======================================
| [    9.798716][  T197] softirqs last disabled at (24103): __irq_exit_rcu (kernel/softirq.c:679 kernel/softirq.c:519 kernel/softirq.c:767)
| [    9.798719][  T197] Preemption disabled at:
| [    9.798719][  T197] 0x0
| [    9.798730][  T197] Tainted: [W]=WARN
[    9.798731][  T197] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    9.798732][  T197] Call Trace:
[    9.798734][  T197]  <TASK>
[    9.798735][  T197]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[    9.798742][  T197]  __might_resched.cold (kernel/sched/core.c:9234)
[    9.798746][  T197]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[    9.798750][  T197]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[    9.798754][  T197]  __kmalloc_noprof (./include/linux/sched/mm.h:322 (discriminator 2) mm/slub.c:4636 (discriminator 2) mm/slub.c:4974 (discriminator 2) mm/slub.c:5413 (discriminator 2) mm/slub.c:5439 (discriminator 2))
[    9.798756][  T197]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[    9.798763][  T197]  ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:58 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[    9.798766][  T197]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[    9.798770][  T197]  put_chars (drivers/char/virtio_console.c:1176)
[    9.798772][  T197]  ? __send_to_port (drivers/char/virtio_console.c:654)
[    9.798774][  T197]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[    9.798777][  T197]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[    9.798782][  T197]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[    9.798790][  T197]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[    9.798793][  T197]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[    9.798795][  T197]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[    9.798799][  T197]  console_emit_next_record (kernel/printk/printk.c:3183)
[    9.798802][  T197]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[    9.798804][  T197]  ? console_flush_one_record (./include/linux/rcupdate.h:314 (discriminator 2) ./include/linux/srcu.h:439 (discriminator 2) kernel/printk/printk.c:291 (discriminator 2) kernel/printk/printk.c:3246 (discriminator 2))
[    9.798808][  T197]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[    9.798809][  T197]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[    9.798813][  T197]  console_flush_one_record (kernel/printk/printk.c:3268)
[    9.798817][  T197]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[    9.798819][  T197]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[    9.798824][  T197]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[    9.798827][  T197]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[    9.798829][  T197]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[    9.798831][  T197]  ? lock_acquire (./include/linux/srcutree.h:374 ./include/linux/srcu.h:541 ./include/linux/srcu.h:645 ./include/trace/events/lock.h:23 ./include/trace/events/lock.h:23 kernel/locking/lockdep.c:5871)
[    9.798835][  T197]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[    9.798836][  T197]  ? vprintk_emit (kernel/printk/printk.c:2478)
[    9.798839][  T197]  vprintk_emit (kernel/printk/printk.c:2479)
[    9.798842][  T197]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[    9.798845][  T197]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[    9.798849][  T197]  _printk (kernel/printk/printk.c:2504)
[    9.798852][  T197]  ? snapshot_read.cold (user.c:?)
[    9.798855][  T197]  ? do_raw_spin_lock (./include/linux/instrumented.h:55 ./include/linux/atomic/atomic-instrumented.h:1301 ./include/asm-generic/qspinlock.h:112 kernel/locking/spinlock_debug.c:116)
[    9.798857][  T197]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[    9.798861][  T197]  ? do_raw_spin_lock (./include/linux/instrumented.h:55 ./include/linux/atomic/atomic-instrumented.h:1301 ./include/asm-generic/qspinlock.h:112 kernel/locking/spinlock_debug.c:116)
[    9.798864][  T197]  do_exit.cold (kernel/exit.c:889 (discriminator 4) kernel/exit.c:1043 (discriminator 4))
[    9.798868][  T197]  ? exit_notify (kernel/exit.c:780)
[    9.798869][  T197]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[    9.798872][  T197]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[    9.798875][  T197]  do_group_exit (kernel/exit.c:1151)
[    9.798878][  T197]  __x64_sys_exit_group (kernel/exit.c:1162 kernel/exit.c:1160 kernel/exit.c:1160)
[    9.798880][  T197]  x64_sys_call (./arch/x86/include/generated/asm/syscalls_64.h:232)
[    9.798882][  T197]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[    9.798886][  T197]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[    9.798889][  T197]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    9.798891][  T197] RIP: 0033:0x7f75f3c131b8
[    9.798893][  T197] Code: Unable to access opcode bytes at 0x7f75f3c1318e.

Code starting with the faulting instruction
===========================================
[    9.798894][  T197] RSP: 002b:00007ffd658b4828 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[    9.798897][  T197] RAX: ffffffffffffffda RBX: 00007f75f3d43f88 RCX: 00007f75f3c131b8
[    9.798898][  T197] RDX: 00007f75f395dfc8 RSI: fffffffffffffeb8 RDI: 0000000000000000
[    9.798899][  T197] RBP: 00007ffd658b4880 R08: 0000000000000000 R09: 0000000000008010
[    9.798900][  T197] R10: 00007ffd658b4640 R11: 0000000000000246 R12: 0000000000000001
[    9.798901][  T197] R13: 0000000000000000 R14: 00007f75f3d42680 R15: 00007f75f3d43fa0
| [   10.828940][  T291] softirqs last disabled at (16346): __alloc_skb (./include/linux/bottom_half.h:20 (discriminator 2) net/core/skbuff.c:697 (discriminator 2))
| [   10.828943][  T291] Preemption disabled at:
| [   10.828943][  T291] vprintk_emit (kernel/printk/printk.c:2471)
| [   10.828952][  T291] Tainted: [W]=WARN
[   10.828953][  T291] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   10.828955][  T291] Call Trace:
[   10.828956][  T291]  <TASK>
[   10.828958][  T291]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   10.828963][  T291]  ? vprintk_emit (kernel/printk/printk.c:2471)
[   10.828965][  T291]  __might_resched.cold (kernel/sched/core.c:9234)
[   10.828970][  T291]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   10.828974][  T291]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   10.828978][  T291]  __kmalloc_noprof (./include/linux/sched/mm.h:322 (discriminator 2) mm/slub.c:4636 (discriminator 2) mm/slub.c:4974 (discriminator 2) mm/slub.c:5413 (discriminator 2) mm/slub.c:5439 (discriminator 2))
[   10.828980][  T291]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   10.828987][  T291]  ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:58 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[   10.828989][  T291]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   10.828993][  T291]  put_chars (drivers/char/virtio_console.c:1176)
[   10.828996][  T291]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   10.828997][  T291]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   10.829001][  T291]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   10.829006][  T291]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   10.829014][  T291]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   10.829017][  T291]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   10.829019][  T291]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   10.829023][  T291]  console_emit_next_record (kernel/printk/printk.c:3183)
[   10.829027][  T291]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   10.829029][  T291]  ? console_flush_one_record (./include/linux/rcupdate.h:314 (discriminator 2) ./include/linux/srcu.h:439 (discriminator 2) kernel/printk/printk.c:291 (discriminator 2) kernel/printk/printk.c:3246 (discriminator 2))
[   10.829032][  T291]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   10.829033][  T291]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   10.829037][  T291]  console_flush_one_record (kernel/printk/printk.c:3268)
[   10.829042][  T291]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   10.829044][  T291]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   10.829049][  T291]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   10.829052][  T291]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   10.829054][  T291]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   10.829056][  T291]  ? lock_acquire (./include/linux/srcutree.h:374 ./include/linux/srcu.h:541 ./include/linux/srcu.h:645 ./include/trace/events/lock.h:23 ./include/trace/events/lock.h:23 kernel/locking/lockdep.c:5871)
[   10.829059][  T291]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   10.829061][  T291]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   10.829064][  T291]  vprintk_emit (kernel/printk/printk.c:2479)
[   10.829067][  T291]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   10.829069][  T291]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   10.829071][  T291]  ? mark_held_locks (kernel/locking/lockdep.c:4341)
[   10.829075][  T291]  _printk (kernel/printk/printk.c:2504)
[   10.829081][  T291]  ? snapshot_read.cold (user.c:?)
[   10.829084][  T291]  ? br_multicast_flood (??:?)
[   10.829088][  T291]  ? do_setlink.isra.0 (net/core/rtnetlink.c:3273 (discriminator 1))
[   10.829089][  T291]  ? rtnl_newlink (net/core/rtnetlink.c:4215)
[   10.829091][  T291]  ? rtnetlink_rcv_msg (net/core/rtnetlink.c:7132)
[   10.829095][  T291]  br_set_state (net/bridge/br_stp.c:57 (discriminator 2))
[   10.829099][  T291]  br_init_port (net/bridge/br_stp_if.c:39)
[   10.829102][  T291]  new_nbp (net/bridge/br_if.c:449)
[   10.829106][  T291]  br_add_if (net/bridge/br_if.c:592)
[   10.829108][  T291]  ? is_bpf_text_address (./include/linux/rcupdate.h:882 kernel/bpf/core.c:751)
[   10.829112][  T291]  ? kernel_text_address (kernel/extable.c:125 kernel/extable.c:94)
[   10.829117][  T291]  do_set_master (net/core/rtnetlink.c:3071)
[   10.829121][  T291]  do_setlink.isra.0 (net/core/rtnetlink.c:3273 (discriminator 1))
[   10.829124][  T291]  ? stack_trace_save (kernel/stacktrace.c:122 (discriminator 1))
[   10.829127][  T291]  ? rtnl_link_get_size (net/core/rtnetlink.c:747)
[   10.829129][  T291]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:388 kernel/rcu/update.c:380)
[   10.829131][  T291]  ? stack_depot_save_flags (lib/stackdepot.c:609 (discriminator 2) lib/stackdepot.c:676 (discriminator 2))
[   10.829135][  T291]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   10.829137][  T291]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   10.829139][  T291]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   10.829141][  T291]  ? kasan_save_stack (mm/kasan/common.c:58)
[   10.829144][  T291]  ? kasan_save_stack (mm/kasan/common.c:57)
[   10.829145][  T291]  ? kasan_save_track (mm/kasan/common.c:78)
[   10.829146][  T291]  ? __kasan_kmalloc (mm/kasan/common.c:398 mm/kasan/common.c:415)
[   10.829148][  T291]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   10.829150][  T291]  ? snd_ac97_proc_read_main (sound/pci/ac97/ac97_proc.c:320)
[   10.829153][  T291]  ? ___sys_sendmsg (net/socket.c:2758)
[   10.829157][  T291]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   10.829159][  T291]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   10.829161][  T291]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   10.829163][  T291]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   10.829165][  T291]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   10.829166][  T291]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   10.829167][  T291]  ? trace_contention_end (./include/trace/events/lock.h:121 (discriminator 22))
[   10.829170][  T291]  ? __mutex_lock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:3188 kernel/locking/mutex.c:89 kernel/locking/mutex.c:134 kernel/locking/mutex.c:649 kernel/locking/mutex.c:821)
[   10.829172][  T291]  ? __mutex_lock (kernel/locking/mutex.c:656 (discriminator 1) kernel/locking/mutex.c:821 (discriminator 1))
[   10.829174][  T291]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   10.829178][  T291]  ? ww_mutex_lock (kernel/locking/mutex.c:934)
[   10.829179][  T291]  ? nla_get_range_signed (lib/nlattr.c:270)
[   10.829183][  T291]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   10.829186][  T291]  ? __rtnl_newlink (net/core/rtnetlink.c:4063)
[   10.829191][  T291]  rtnl_newlink (net/core/rtnetlink.c:4215)
[   10.829196][  T291]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   10.829198][  T291]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   10.829203][  T291]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   10.829205][  T291]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   10.829207][  T291]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   10.829209][  T291]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   10.829213][  T291]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   10.829215][  T291]  rtnetlink_rcv_msg (net/core/rtnetlink.c:7132)
[   10.829218][  T291]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   10.829219][  T291]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   10.829224][  T291]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   10.829226][  T291]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   10.829229][  T291]  netlink_rcv_skb (net/netlink/af_netlink.c:2556)
[   10.829232][  T291]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   10.829235][  T291]  ? netlink_ack (./include/linux/skbuff.h:2718)
[   10.829242][  T291]  ? netlink_deliver_tap (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) ./include/net/netns/generic.h:48 (discriminator 2) net/netlink/af_netlink.c:334 (discriminator 2))
[   10.829244][  T291]  ? netlink_deliver_tap (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) net/netlink/af_netlink.c:341 (discriminator 2))
[   10.829248][  T291]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1345)
[   10.829252][  T291]  ? netlink_attachskb (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[   10.829255][  T291]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   10.829259][  T291]  netlink_sendmsg (net/netlink/af_netlink.c:1900)
[   10.829263][  T291]  ? netlink_unicast (./include/net/net_namespace.h:422 (discriminator 7))
[   10.829267][  T291]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   10.829269][  T291]  ? __import_iovec (lib/iov_iter.c:1358 lib/iov_iter.c:1373)
[   10.829274][  T291]  __sock_sendmsg (net/socket.c:800 (discriminator 4) net/socket.c:815 (discriminator 4))
[   10.829277][  T291]  ____sys_sendmsg (net/socket.c:2713)
[   10.829279][  T291]  ? copy_msghdr_from_user (net/socket.c:2650)
[   10.829282][  T291]  ? sock_write_iter (net/socket.c:1269)
[   10.829283][  T291]  ? move_addr_to_kernel (net/socket.c:258)
[   10.829291][  T291]  ___sys_sendmsg (net/socket.c:2767)
[   10.829293][  T291]  ? copy_msghdr_from_user (net/socket.c:2619)
[   10.829310][  T291]  __sys_sendmsg (net/socket.c:2799)
[   10.829312][  T291]  ? __sys_sendmsg_sock (net/socket.c:2780)
[   10.829319][  T291]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   10.829322][  T291]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   10.829325][  T291]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   10.829328][  T291]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   10.829330][  T291] RIP: 0033:0x7f320341c54e
[   10.829333][  T291] Code: 4d 89 d8 e8 b4 bd 00 00 4c 8b 5d f8 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 11 c9 c3 0f 1f 80 00 00 00 00 48 8b 45 10 0f 05 <c9> c3 83 e2 39 83 fa 08 75 e7 e8 03 ff ff ff 0f 1f 00 f3 0f 1e fa
All code
========
   0:	4d 89 d8             	mov    %r11,%r8
   3:	e8 b4 bd 00 00       	call   0xbdbc
   8:	4c 8b 5d f8          	mov    -0x8(%rbp),%r11
   c:	41 8b 93 08 03 00 00 	mov    0x308(%r11),%edx
  13:	59                   	pop    %rcx
  14:	5e                   	pop    %rsi
  15:	48 83 f8 fc          	cmp    $0xfffffffffffffffc,%rax
  19:	74 11                	je     0x2c
  1b:	c9                   	leave
  1c:	c3                   	ret
  1d:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  24:	48 8b 45 10          	mov    0x10(%rbp),%rax
  28:	0f 05                	syscall
  2a:*	c9                   	leave		<-- trapping instruction
  2b:	c3                   	ret
  2c:	83 e2 39             	and    $0x39,%edx
  2f:	83 fa 08             	cmp    $0x8,%edx
  32:	75 e7                	jne    0x1b
  34:	e8 03 ff ff ff       	call   0xffffffffffffff3c
  39:	0f 1f 00             	nopl   (%rax)
  3c:	f3 0f 1e fa          	endbr64

Code starting with the faulting instruction
===========================================
   0:	c9                   	leave
   1:	c3                   	ret
   2:	83 e2 39             	and    $0x39,%edx
   5:	83 fa 08             	cmp    $0x8,%edx
   8:	75 e7                	jne    0xfffffffffffffff1
   a:	e8 03 ff ff ff       	call   0xffffffffffffff12
   f:	0f 1f 00             	nopl   (%rax)
  12:	f3 0f 1e fa          	endbr64
[   10.829335][  T291] RSP: 002b:00007ffe522433c0 EFLAGS: 00000202 ORIG_RAX: 000000000000002e
[   10.829338][  T291] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f320341c54e
[   10.829339][  T291] RDX: 0000000000000000 RSI: 00007ffe52243470 RDI: 0000000000000005
[   10.829340][  T291] RBP: 00007ffe522433d0 R08: 0000000000000000 R09: 0000000000000000
[   10.829341][  T291] R10: 0000000000000000 R11: 0000000000000202 R12: 000000006a915cd1
[   10.829342][  T291] R13: 00000000004a1620 R14: 0000000000000000 R15: 00007ffe52243b30
| [   11.864243][  T388] softirqs last disabled at (23944): br_device_event (./include/linux/spinlock.h:353 net/bridge/br.c:109)
| [   11.864245][  T388] Preemption disabled at:
| [   11.864246][  T388] 0x0
| [   11.864257][  T388] Tainted: [W]=WARN
[   11.864258][  T388] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   11.864259][  T388] Call Trace:
[   11.864261][  T388]  <TASK>
[   11.864263][  T388]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   11.864270][  T388]  __might_resched.cold (kernel/sched/core.c:9234)
[   11.864274][  T388]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   11.864279][  T388]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   11.864283][  T388]  __kmalloc_noprof (./include/linux/sched/mm.h:322 (discriminator 2) mm/slub.c:4636 (discriminator 2) mm/slub.c:4974 (discriminator 2) mm/slub.c:5413 (discriminator 2) mm/slub.c:5439 (discriminator 2))
[   11.864285][  T388]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   11.864292][  T388]  ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:58 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[   11.864295][  T388]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   11.864299][  T388]  put_chars (drivers/char/virtio_console.c:1176)
[   11.864301][  T388]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   11.864307][  T388]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   11.864315][  T388]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   11.864318][  T388]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   11.864322][  T388]  console_emit_next_record (kernel/printk/printk.c:3183)
[   11.864326][  T388]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   11.864328][  T388]  ? console_flush_one_record (./include/linux/rcupdate.h:314 (discriminator 2) ./include/linux/srcu.h:439 (discriminator 2) kernel/printk/printk.c:291 (discriminator 2) kernel/printk/printk.c:3246 (discriminator 2))
[   11.864332][  T388]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.864334][  T388]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   11.864338][  T388]  console_flush_one_record (kernel/printk/printk.c:3268)
[   11.864343][  T388]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   11.864344][  T388]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   11.864350][  T388]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   11.864353][  T388]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   11.864354][  T388]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.864356][  T388]  ? lock_acquire (./include/linux/srcutree.h:374 ./include/linux/srcu.h:541 ./include/linux/srcu.h:645 ./include/trace/events/lock.h:23 ./include/trace/events/lock.h:23 kernel/locking/lockdep.c:5871)
[   11.864360][  T388]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   11.864362][  T388]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   11.864364][  T388]  vprintk_emit (kernel/printk/printk.c:2479)
[   11.864367][  T388]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   11.864369][  T388]  ? mark_held_locks (kernel/locking/lockdep.c:4341)
[   11.864371][  T388]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   11.864373][  T388]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   11.864378][  T388]  _printk (kernel/printk/printk.c:2504)
[   11.864381][  T388]  ? snapshot_read.cold (user.c:?)
[   11.864389][  T388]  br_set_state (net/bridge/br_stp.c:57 (discriminator 2))
[   11.864393][  T388]  br_stp_disable_port (net/bridge/br_stp_if.c:106)
[   11.864397][  T388]  br_device_event (net/bridge/br.c:111)
[   11.864404][  T388]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:211 (discriminator 1) kernel/locking/spinlock.c:221 (discriminator 1))
[   11.864408][  T388]  ? packet_sendmsg_spkt (af_packet.c:?)
[   11.864413][  T388]  notifier_call_chain (kernel/notifier.c:85)
[   11.864419][  T388]  __dev_notify_flags (net/core/dev.c:2313 net/core/dev.c:2327 net/core/dev.c:9855)
[   11.864424][  T388]  ? netif_change_name (net/core/dev.c:1517)
[   11.864428][  T388]  ? netif_set_allmulti (./include/net/netdev_lock.h:33)
[   11.864431][  T388]  ? __kernel_text_address (kernel/extable.c:79)
[   11.864434][  T388]  ? write_profile (profile.c:?)
[   11.864439][  T388]  netif_change_flags (net/core/dev.c:9882)
[   11.864443][  T388]  do_setlink.isra.0 (net/core/rtnetlink.c:3266 (discriminator 1))
[   11.864447][  T388]  ? stack_trace_save (kernel/stacktrace.c:122 (discriminator 1))
[   11.864449][  T388]  ? rtnl_link_get_size (net/core/rtnetlink.c:747)
[   11.864450][  T388]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:388 kernel/rcu/update.c:380)
[   11.864452][  T388]  ? stack_depot_save_flags (lib/stackdepot.c:609 (discriminator 2) lib/stackdepot.c:676 (discriminator 2))
[   11.864455][  T388]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   11.864457][  T388]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   11.864459][  T388]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   11.864462][  T388]  ? kasan_save_stack (mm/kasan/common.c:58)
[   11.864464][  T388]  ? kasan_save_stack (mm/kasan/common.c:57)
[   11.864465][  T388]  ? kasan_save_track (mm/kasan/common.c:78)
[   11.864467][  T388]  ? __kasan_kmalloc (mm/kasan/common.c:398 mm/kasan/common.c:415)
[   11.864469][  T388]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   11.864471][  T388]  ? snd_ac97_proc_read_main (sound/pci/ac97/ac97_proc.c:320)
[   11.864474][  T388]  ? ___sys_sendmsg (net/socket.c:2758)
[   11.864478][  T388]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   11.864480][  T388]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   11.864482][  T388]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.864484][  T388]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   11.864485][  T388]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.864487][  T388]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.864488][  T388]  ? trace_contention_end (./include/trace/events/lock.h:121 (discriminator 22))
[   11.864491][  T388]  ? __mutex_lock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:3188 kernel/locking/mutex.c:89 kernel/locking/mutex.c:134 kernel/locking/mutex.c:649 kernel/locking/mutex.c:821)
[   11.864492][  T388]  ? __mutex_lock (kernel/locking/mutex.c:656 (discriminator 1) kernel/locking/mutex.c:821 (discriminator 1))
[   11.864494][  T388]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   11.864497][  T388]  ? ww_mutex_lock (kernel/locking/mutex.c:934)
[   11.864501][  T388]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.864503][  T388]  ? __rtnl_newlink (net/core/rtnetlink.c:4063)
[   11.864508][  T388]  rtnl_newlink (net/core/rtnetlink.c:4215)
[   11.864513][  T388]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   11.864515][  T388]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   11.864520][  T388]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   11.864522][  T388]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   11.864524][  T388]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   11.864526][  T388]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   11.864529][  T388]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   11.864531][  T388]  rtnetlink_rcv_msg (net/core/rtnetlink.c:7132)
[   11.864535][  T388]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   11.864536][  T388]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   11.864540][  T388]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   11.864542][  T388]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   11.864546][  T388]  netlink_rcv_skb (net/netlink/af_netlink.c:2556)
[   11.864549][  T388]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   11.864552][  T388]  ? netlink_ack (./include/linux/skbuff.h:2718)
[   11.864558][  T388]  ? netlink_deliver_tap (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) ./include/net/netns/generic.h:48 (discriminator 2) net/netlink/af_netlink.c:334 (discriminator 2))
[   11.864561][  T388]  ? netlink_deliver_tap (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) net/netlink/af_netlink.c:341 (discriminator 2))
[   11.864565][  T388]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1345)
[   11.864569][  T388]  ? netlink_attachskb (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[   11.864572][  T388]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   11.864576][  T388]  netlink_sendmsg (net/netlink/af_netlink.c:1900)
[   11.864580][  T388]  ? netlink_unicast (./include/net/net_namespace.h:422 (discriminator 7))
[   11.864584][  T388]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   11.864585][  T388]  ? __import_iovec (lib/iov_iter.c:1358 lib/iov_iter.c:1373)
[   11.864591][  T388]  __sock_sendmsg (net/socket.c:800 (discriminator 4) net/socket.c:815 (discriminator 4))
[   11.864593][  T388]  ____sys_sendmsg (net/socket.c:2713)
[   11.864596][  T388]  ? copy_msghdr_from_user (net/socket.c:2650)
[   11.864598][  T388]  ? sock_write_iter (net/socket.c:1269)
[   11.864599][  T388]  ? move_addr_to_kernel (net/socket.c:258)
[   11.864607][  T388]  ___sys_sendmsg (net/socket.c:2767)
[   11.864610][  T388]  ? copy_msghdr_from_user (net/socket.c:2619)
[   11.864626][  T388]  __sys_sendmsg (net/socket.c:2799)
[   11.864628][  T388]  ? __sys_sendmsg_sock (net/socket.c:2780)
[   11.864635][  T388]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.864638][  T388]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   11.864641][  T388]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   11.864644][  T388]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   11.864646][  T388] RIP: 0033:0x7f3ff551154e
[   11.864648][  T388] Code: 4d 89 d8 e8 b4 bd 00 00 4c 8b 5d f8 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 11 c9 c3 0f 1f 80 00 00 00 00 48 8b 45 10 0f 05 <c9> c3 83 e2 39 83 fa 08 75 e7 e8 03 ff ff ff 0f 1f 00 f3 0f 1e fa
All code
========
   0:	4d 89 d8             	mov    %r11,%r8
   3:	e8 b4 bd 00 00       	call   0xbdbc
   8:	4c 8b 5d f8          	mov    -0x8(%rbp),%r11
   c:	41 8b 93 08 03 00 00 	mov    0x308(%r11),%edx
  13:	59                   	pop    %rcx
  14:	5e                   	pop    %rsi
  15:	48 83 f8 fc          	cmp    $0xfffffffffffffffc,%rax
  19:	74 11                	je     0x2c
  1b:	c9                   	leave
  1c:	c3                   	ret
  1d:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  24:	48 8b 45 10          	mov    0x10(%rbp),%rax
  28:	0f 05                	syscall
  2a:*	c9                   	leave		<-- trapping instruction
  2b:	c3                   	ret
  2c:	83 e2 39             	and    $0x39,%edx
  2f:	83 fa 08             	cmp    $0x8,%edx
  32:	75 e7                	jne    0x1b
  34:	e8 03 ff ff ff       	call   0xffffffffffffff3c
  39:	0f 1f 00             	nopl   (%rax)
  3c:	f3 0f 1e fa          	endbr64

Code starting with the faulting instruction
===========================================
   0:	c9                   	leave
   1:	c3                   	ret
   2:	83 e2 39             	and    $0x39,%edx
   5:	83 fa 08             	cmp    $0x8,%edx
   8:	75 e7                	jne    0xfffffffffffffff1
   a:	e8 03 ff ff ff       	call   0xffffffffffffff12
   f:	0f 1f 00             	nopl   (%rax)
  12:	f3 0f 1e fa          	endbr64
[   11.864650][  T388] RSP: 002b:00007ffcc08528c0 EFLAGS: 00000202 ORIG_RAX: 000000000000002e
[   11.864653][  T388] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f3ff551154e
[   11.864654][  T388] RDX: 0000000000000000 RSI: 00007ffcc0852970 RDI: 0000000000000005
[   11.864655][  T388] RBP: 00007ffcc08528d0 R08: 0000000000000000 R09: 0000000000000000
[   11.864656][  T388] R10: 0000000000000000 R11: 0000000000000202 R12: 000000006a915cd2
[   11.864656][  T388] R13: 00000000004a1620 R14: 0000000000000000 R15: 00007ffcc0853030
| [   13.132233][   T38] softirqs last disabled at (30220): br_port_carrier_check (./include/linux/spinlock.h:353 net/bridge/br_if.c:87)
| [   13.132236][   T38] Preemption disabled at:
| [   13.132237][   T38] 0x0
| [   13.132248][   T38] Tainted: [W]=WARN
[   13.132249][   T38] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   13.132250][   T38] Workqueue: events_unbound linkwatch_event
[   13.132253][   T38] Call Trace:
[   13.132255][   T38]  <TASK>
[   13.132257][   T38]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   13.132263][   T38]  __might_resched.cold (kernel/sched/core.c:9234)
[   13.132268][   T38]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   13.132272][   T38]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   13.132277][   T38]  __kmalloc_noprof (./include/linux/sched/mm.h:322 (discriminator 2) mm/slub.c:4636 (discriminator 2) mm/slub.c:4974 (discriminator 2) mm/slub.c:5413 (discriminator 2) mm/slub.c:5439 (discriminator 2))
[   13.132279][   T38]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   13.132286][   T38]  ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:58 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[   13.132289][   T38]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   13.132293][   T38]  put_chars (drivers/char/virtio_console.c:1176)
[   13.132295][   T38]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   13.132298][   T38]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   13.132301][   T38]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   13.132304][   T38]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   13.132308][   T38]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   13.132312][   T38]  ? mark_usage (kernel/locking/lockdep.c:4690)
[   13.132314][   T38]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   13.132316][   T38]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   13.132320][   T38]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   13.132322][   T38]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   13.132327][   T38]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   13.132331][   T38]  console_emit_next_record (kernel/printk/printk.c:3183)
[   13.132335][   T38]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   13.132337][   T38]  ? console_flush_one_record (./include/linux/rcupdate.h:314 (discriminator 2) ./include/linux/srcu.h:439 (discriminator 2) kernel/printk/printk.c:291 (discriminator 2) kernel/printk/printk.c:3246 (discriminator 2))
[   13.132340][   T38]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   13.132342][   T38]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   13.132346][   T38]  console_flush_one_record (kernel/printk/printk.c:3268)
[   13.132351][   T38]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   13.132353][   T38]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   13.132358][   T38]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   13.132361][   T38]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   13.132363][   T38]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   13.132365][   T38]  ? lock_acquire (./include/linux/srcutree.h:374 ./include/linux/srcu.h:541 ./include/linux/srcu.h:645 ./include/trace/events/lock.h:23 ./include/trace/events/lock.h:23 kernel/locking/lockdep.c:5871)
[   13.132369][   T38]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   13.132371][   T38]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   13.132373][   T38]  vprintk_emit (kernel/printk/printk.c:2479)
[   13.132377][   T38]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   13.132379][   T38]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   13.132381][   T38]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   13.132385][   T38]  _printk (kernel/printk/printk.c:2504)
[   13.132389][   T38]  ? snapshot_read.cold (user.c:?)
[   13.132394][   T38]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   13.132398][   T38]  br_set_state (net/bridge/br_stp.c:57 (discriminator 2))
[   13.132407][   T38]  br_init_port (net/bridge/br_stp_if.c:39)
[   13.132410][   T38]  br_stp_enable_port (net/bridge/br_stp_if.c:93)
[   13.132412][   T38]  br_port_carrier_check (net/bridge/br_if.c:90)
[   13.132416][   T38]  br_device_event (net/bridge/br.c:101)
[   13.132419][   T38]  ? packet_sendmsg_spkt (af_packet.c:?)
[   13.132421][   T38]  ? nlmsg_notify (./include/net/netlink.h:1165 ./include/net/netlink.h:1184 net/netlink/af_netlink.c:2599)
[   13.132428][   T38]  notifier_call_chain (kernel/notifier.c:85)
[   13.132434][   T38]  netif_state_change (net/core/dev.c:1625)
[   13.132438][   T38]  ? call_netdevice_notifiers_info (./include/net/net_namespace.h:422 (discriminator 7))
[   13.132444][   T38]  ? linkwatch_do_dev (net/core/link_watch.c:182 net/core/link_watch.c:166)
[   13.132446][   T38]  __linkwatch_run_queue (net/core/link_watch.c:240)
[   13.132449][   T38]  ? linkwatch_do_dev (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[   13.132451][   T38]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   13.132456][   T38]  linkwatch_event (net/core/link_watch.c:314 (discriminator 11))
[   13.132458][   T38]  ? __linkwatch_run_queue (net/core/link_watch.c:213)
[   13.132461][   T38]  process_one_work (kernel/workqueue.c:3387)
[   13.132468][   T38]  ? __queue_delayed_work (kernel/workqueue.c:2622)
[   13.132471][   T38]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   13.132479][   T38]  worker_thread (kernel/workqueue.c:3470 kernel/workqueue.c:3551)
[   13.132486][   T38]  ? rescuer_thread (./include/linux/list.h:419 (discriminator 3))
[   13.132488][   T38]  kthread (kernel/kthread.c:436)
[   13.132491][   T38]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   13.132494][   T38]  ? kthread_affine_preferred (kernel/kthread.c:857)
[   13.132497][   T38]  ret_from_fork (arch/x86/kernel/process.c:158)
[   13.132501][   T38]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/vdso/vma.c:80 (discriminator 1))
[   13.132505][   T38]  ? __switch_to (arch/x86/kernel/process_64.c:403 arch/x86/kernel/process_64.c:663)
[   13.132508][   T38]  ? kthread_affine_preferred (kernel/kthread.c:857)
[   13.132511][   T38]  ret_from_fork_asm (arch/x86/entry/entry_64.S:245)
| [   14.574513][  T649] softirqs last disabled at (13546): br_device_event (./include/linux/spinlock.h:353 net/bridge/br.c:109)
| [   14.574515][  T649] Preemption disabled at:
| [   14.574516][  T649] 0x0
| [   14.574526][  T649] Tainted: [W]=WARN
[   14.574527][  T649] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   14.574528][  T649] Call Trace:
[   14.574530][  T649]  <TASK>
[   14.574532][  T649]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   14.574539][  T649]  __might_resched.cold (kernel/sched/core.c:9234)
[   14.574543][  T649]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   14.574547][  T649]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   14.574551][  T649]  __kmalloc_noprof (./include/linux/sched/mm.h:322 (discriminator 2) mm/slub.c:4636 (discriminator 2) mm/slub.c:4974 (discriminator 2) mm/slub.c:5413 (discriminator 2) mm/slub.c:5439 (discriminator 2))
[   14.574553][  T649]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   14.574560][  T649]  ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:58 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[   14.574563][  T649]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   14.574567][  T649]  put_chars (drivers/char/virtio_console.c:1176)
[   14.574569][  T649]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   14.574575][  T649]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   14.574583][  T649]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   14.574586][  T649]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   14.574591][  T649]  console_emit_next_record (kernel/printk/printk.c:3183)
[   14.574595][  T649]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   14.574597][  T649]  ? console_flush_one_record (./include/linux/rcupdate.h:314 (discriminator 2) ./include/linux/srcu.h:439 (discriminator 2) kernel/printk/printk.c:291 (discriminator 2) kernel/printk/printk.c:3246 (discriminator 2))
[   14.574600][  T649]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   14.574603][  T649]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   14.574607][  T649]  console_flush_one_record (kernel/printk/printk.c:3268)
[   14.574611][  T649]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   14.574613][  T649]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   14.574618][  T649]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   14.574621][  T649]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   14.574623][  T649]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   14.574625][  T649]  ? lock_acquire (./include/linux/srcutree.h:374 ./include/linux/srcu.h:541 ./include/linux/srcu.h:645 ./include/trace/events/lock.h:23 ./include/trace/events/lock.h:23 kernel/locking/lockdep.c:5871)
[   14.574628][  T649]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   14.574630][  T649]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   14.574633][  T649]  vprintk_emit (kernel/printk/printk.c:2479)
[   14.574636][  T649]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   14.574637][  T649]  ? mark_held_locks (kernel/locking/lockdep.c:4341)
[   14.574639][  T649]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   14.574641][  T649]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   14.574646][  T649]  _printk (kernel/printk/printk.c:2504)
[   14.574649][  T649]  ? snapshot_read.cold (user.c:?)
[   14.574657][  T649]  br_set_state (net/bridge/br_stp.c:57 (discriminator 2))
[   14.574662][  T649]  br_stp_disable_port (net/bridge/br_stp_if.c:106)
[   14.574665][  T649]  br_device_event (net/bridge/br.c:111)
[   14.574667][  T649]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:211 (discriminator 1) kernel/locking/spinlock.c:221 (discriminator 1))
[   14.574671][  T649]  ? packet_sendmsg_spkt (af_packet.c:?)
[   14.574677][  T649]  notifier_call_chain (kernel/notifier.c:85)
[   14.574683][  T649]  __dev_notify_flags (net/core/dev.c:2313 net/core/dev.c:2327 net/core/dev.c:9855)
[   14.574688][  T649]  ? netif_change_name (net/core/dev.c:1517)
[   14.574691][  T649]  ? netif_set_allmulti (./include/net/netdev_lock.h:33)
[   14.574695][  T649]  ? __kernel_text_address (kernel/extable.c:79)
[   14.574697][  T649]  ? write_profile (profile.c:?)
[   14.574702][  T649]  netif_change_flags (net/core/dev.c:9882)
[   14.574706][  T649]  do_setlink.isra.0 (net/core/rtnetlink.c:3266 (discriminator 1))
[   14.574709][  T649]  ? stack_trace_save (kernel/stacktrace.c:122 (discriminator 1))
[   14.574711][  T649]  ? rtnl_link_get_size (net/core/rtnetlink.c:747)
[   14.574712][  T649]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:388 kernel/rcu/update.c:380)
[   14.574714][  T649]  ? stack_depot_save_flags (lib/stackdepot.c:609 (discriminator 2) lib/stackdepot.c:676 (discriminator 2))
[   14.574718][  T649]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   14.574720][  T649]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   14.574721][  T649]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   14.574724][  T649]  ? kasan_save_stack (mm/kasan/common.c:58)
[   14.574726][  T649]  ? kasan_save_stack (mm/kasan/common.c:57)
[   14.574727][  T649]  ? kasan_save_track (mm/kasan/common.c:78)
[   14.574729][  T649]  ? __kasan_kmalloc (mm/kasan/common.c:398 mm/kasan/common.c:415)
[   14.574731][  T649]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   14.574733][  T649]  ? snd_ac97_proc_read_main (sound/pci/ac97/ac97_proc.c:320)
[   14.574736][  T649]  ? ___sys_sendmsg (net/socket.c:2758)
[   14.574740][  T649]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   14.574742][  T649]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   14.574744][  T649]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   14.574746][  T649]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   14.574748][  T649]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   14.574749][  T649]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   14.574750][  T649]  ? trace_contention_end (./include/trace/events/lock.h:121 (discriminator 22))
[   14.574752][  T649]  ? __mutex_lock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:3188 kernel/locking/mutex.c:89 kernel/locking/mutex.c:134 kernel/locking/mutex.c:649 kernel/locking/mutex.c:821)
[   14.574754][  T649]  ? __mutex_lock (kernel/locking/mutex.c:656 (discriminator 1) kernel/locking/mutex.c:821 (discriminator 1))
[   14.574756][  T649]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   14.574759][  T649]  ? ww_mutex_lock (kernel/locking/mutex.c:934)
[   14.574763][  T649]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   14.574765][  T649]  ? __rtnl_newlink (net/core/rtnetlink.c:4063)
[   14.574770][  T649]  rtnl_newlink (net/core/rtnetlink.c:4215)
[   14.574776][  T649]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   14.574778][  T649]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   14.574782][  T649]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   14.574784][  T649]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   14.574786][  T649]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   14.574788][  T649]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   14.574792][  T649]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   14.574794][  T649]  rtnetlink_rcv_msg (net/core/rtnetlink.c:7132)
[   14.574797][  T649]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   14.574798][  T649]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   14.574803][  T649]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   14.574805][  T649]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   14.574808][  T649]  netlink_rcv_skb (net/netlink/af_netlink.c:2556)
[   14.574812][  T649]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   14.574815][  T649]  ? netlink_ack (./include/linux/skbuff.h:2718)
[   14.574821][  T649]  ? netlink_deliver_tap (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) ./include/net/netns/generic.h:48 (discriminator 2) net/netlink/af_netlink.c:334 (discriminator 2))
[   14.574823][  T649]  ? netlink_deliver_tap (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) net/netlink/af_netlink.c:341 (discriminator 2))
[   14.574828][  T649]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1345)
[   14.574832][  T649]  ? netlink_attachskb (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[   14.574834][  T649]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   14.574838][  T649]  netlink_sendmsg (net/netlink/af_netlink.c:1900)
[   14.574842][  T649]  ? netlink_unicast (./include/net/net_namespace.h:422 (discriminator 7))
[   14.574846][  T649]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   14.574848][  T649]  ? __import_iovec (lib/iov_iter.c:1358 lib/iov_iter.c:1373)
[   14.574853][  T649]  __sock_sendmsg (net/socket.c:800 (discriminator 4) net/socket.c:815 (discriminator 4))
[   14.574856][  T649]  ____sys_sendmsg (net/socket.c:2713)
[   14.574858][  T649]  ? copy_msghdr_from_user (net/socket.c:2650)
[   14.574860][  T649]  ? sock_write_iter (net/socket.c:1269)
[   14.574862][  T649]  ? move_addr_to_kernel (net/socket.c:258)
[   14.574869][  T649]  ___sys_sendmsg (net/socket.c:2767)
[   14.574872][  T649]  ? copy_msghdr_from_user (net/socket.c:2619)
[   14.574888][  T649]  __sys_sendmsg (net/socket.c:2799)
[   14.574891][  T649]  ? __sys_sendmsg_sock (net/socket.c:2780)
[   14.574897][  T649]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   14.574900][  T649]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   14.574903][  T649]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   14.574906][  T649]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   14.574909][  T649] RIP: 0033:0x7f27ec28a54e
[   14.574911][  T649] Code: 4d 89 d8 e8 b4 bd 00 00 4c 8b 5d f8 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 11 c9 c3 0f 1f 80 00 00 00 00 48 8b 45 10 0f 05 <c9> c3 83 e2 39 83 fa 08 75 e7 e8 03 ff ff ff 0f 1f 00 f3 0f 1e fa
All code
========
   0:	4d 89 d8             	mov    %r11,%r8
   3:	e8 b4 bd 00 00       	call   0xbdbc
   8:	4c 8b 5d f8          	mov    -0x8(%rbp),%r11
   c:	41 8b 93 08 03 00 00 	mov    0x308(%r11),%edx
  13:	59                   	pop    %rcx
  14:	5e                   	pop    %rsi
  15:	48 83 f8 fc          	cmp    $0xfffffffffffffffc,%rax
  19:	74 11                	je     0x2c
  1b:	c9                   	leave
  1c:	c3                   	ret
  1d:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  24:	48 8b 45 10          	mov    0x10(%rbp),%rax
  28:	0f 05                	syscall
  2a:*	c9                   	leave		<-- trapping instruction
  2b:	c3                   	ret
  2c:	83 e2 39             	and    $0x39,%edx
  2f:	83 fa 08             	cmp    $0x8,%edx
  32:	75 e7                	jne    0x1b
  34:	e8 03 ff ff ff       	call   0xffffffffffffff3c
  39:	0f 1f 00             	nopl   (%rax)
  3c:	f3 0f 1e fa          	endbr64

Code starting with the faulting instruction
===========================================
   0:	c9                   	leave
   1:	c3                   	ret
   2:	83 e2 39             	and    $0x39,%edx
   5:	83 fa 08             	cmp    $0x8,%edx
   8:	75 e7                	jne    0xfffffffffffffff1
   a:	e8 03 ff ff ff       	call   0xffffffffffffff12
   f:	0f 1f 00             	nopl   (%rax)
  12:	f3 0f 1e fa          	endbr64
[   14.574913][  T649] RSP: 002b:00007fff8c6b3aa0 EFLAGS: 00000202 ORIG_RAX: 000000000000002e
[   14.574916][  T649] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f27ec28a54e
[   14.574917][  T649] RDX: 0000000000000000 RSI: 00007fff8c6b3b50 RDI: 0000000000000005
[   14.574918][  T649] RBP: 00007fff8c6b3ab0 R08: 0000000000000000 R09: 0000000000000000
[   14.574919][  T649] R10: 0000000000000000 R11: 0000000000000202 R12: 000000006a915cd4
[   14.574919][  T649] R13: 00000000004a1620 R14: 0000000000000000 R15: 00007fff8c6b4210
| [   15.862231][  T787] softirqs last disabled at (18374): br_device_event (./include/linux/spinlock.h:353 net/bridge/br.c:119)
| [   15.862235][  T787] Preemption disabled at:
| [   15.862236][  T787] 0x0
| [   15.862248][  T787] Tainted: [W]=WARN
[   15.862249][  T787] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.862251][  T787] Call Trace:
[   15.862254][  T787]  <TASK>
[   15.862256][  T787]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   15.862264][  T787]  __might_resched.cold (kernel/sched/core.c:9234)
[   15.862270][  T787]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   15.862276][  T787]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   15.862283][  T787]  __kmalloc_noprof (./include/linux/sched/mm.h:322 (discriminator 2) mm/slub.c:4636 (discriminator 2) mm/slub.c:4974 (discriminator 2) mm/slub.c:5413 (discriminator 2) mm/slub.c:5439 (discriminator 2))
[   15.862286][  T787]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   15.862296][  T787]  ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:58 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[   15.862300][  T787]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   15.862306][  T787]  put_chars (drivers/char/virtio_console.c:1176)
[   15.862310][  T787]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   15.862312][  T787]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   15.862318][  T787]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   15.862327][  T787]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   15.862339][  T787]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   15.862343][  T787]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   15.862347][  T787]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   15.862354][  T787]  console_emit_next_record (kernel/printk/printk.c:3183)
[   15.862360][  T787]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   15.862363][  T787]  ? console_flush_one_record (./include/linux/rcupdate.h:314 (discriminator 2) ./include/linux/srcu.h:439 (discriminator 2) kernel/printk/printk.c:291 (discriminator 2) kernel/printk/printk.c:3246 (discriminator 2))
[   15.862368][  T787]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   15.862371][  T787]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   15.862378][  T787]  console_flush_one_record (kernel/printk/printk.c:3268)
[   15.862385][  T787]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   15.862388][  T787]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   15.862398][  T787]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   15.862406][  T787]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   15.862408][  T787]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   15.862411][  T787]  ? lock_acquire (./include/linux/srcutree.h:374 ./include/linux/srcu.h:541 ./include/linux/srcu.h:645 ./include/trace/events/lock.h:23 ./include/trace/events/lock.h:23 kernel/locking/lockdep.c:5871)
[   15.862418][  T787]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   15.862420][  T787]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   15.862425][  T787]  vprintk_emit (kernel/printk/printk.c:2479)
[   15.862431][  T787]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   15.862434][  T787]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   15.862438][  T787]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   15.862445][  T787]  _printk (kernel/printk/printk.c:2504)
[   15.862451][  T787]  ? snapshot_read.cold (user.c:?)
[   15.862459][  T787]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   15.862466][  T787]  br_set_state (net/bridge/br_stp.c:57 (discriminator 2))
[   15.862474][  T787]  br_init_port (net/bridge/br_stp_if.c:39)
[   15.862478][  T787]  br_stp_enable_port (net/bridge/br_stp_if.c:93)
[   15.862481][  T787]  br_device_event (net/bridge/br.c:120)
[   15.862486][  T787]  ? packet_sendmsg_spkt (af_packet.c:?)
[   15.862488][  T787]  ? nlmsg_notify (./include/net/netlink.h:1165 ./include/net/netlink.h:1184 net/netlink/af_netlink.c:2599)
[   15.862499][  T787]  notifier_call_chain (kernel/notifier.c:85)
[   15.862509][  T787]  __dev_notify_flags (net/core/dev.c:2313 net/core/dev.c:2327 net/core/dev.c:9853)
[   15.862516][  T787]  ? netif_change_name (net/core/dev.c:1517)
[   15.862523][  T787]  ? netif_set_allmulti (./include/net/netdev_lock.h:33)
[   15.862527][  T787]  ? kernel_text_address (kernel/extable.c:125 kernel/extable.c:94)
[   15.862531][  T787]  ? __kernel_text_address (kernel/extable.c:79)
[   15.862534][  T787]  ? write_profile (profile.c:?)
[   15.862541][  T787]  netif_change_flags (net/core/dev.c:9882)
[   15.862548][  T787]  do_setlink.isra.0 (net/core/rtnetlink.c:3266 (discriminator 1))
[   15.862554][  T787]  ? stack_trace_save (kernel/stacktrace.c:122 (discriminator 1))
[   15.862558][  T787]  ? rtnl_link_get_size (net/core/rtnetlink.c:747)
[   15.862560][  T787]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:388 kernel/rcu/update.c:380)
[   15.862563][  T787]  ? stack_depot_save_flags (lib/stackdepot.c:609 (discriminator 2) lib/stackdepot.c:676 (discriminator 2))
[   15.862568][  T787]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   15.862574][  T787]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   15.862577][  T787]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   15.862581][  T787]  ? kasan_save_stack (mm/kasan/common.c:58)
[   15.862584][  T787]  ? kasan_save_stack (mm/kasan/common.c:57)
[   15.862586][  T787]  ? kasan_save_track (mm/kasan/common.c:78)
[   15.862588][  T787]  ? __kasan_kmalloc (mm/kasan/common.c:398 mm/kasan/common.c:415)
[   15.862592][  T787]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   15.862595][  T787]  ? snd_ac97_proc_read_main (sound/pci/ac97/ac97_proc.c:320)
[   15.862599][  T787]  ? ___sys_sendmsg (net/socket.c:2758)
[   15.862605][  T787]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   15.862609][  T787]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   15.862613][  T787]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   15.862616][  T787]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   15.862619][  T787]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   15.862621][  T787]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   15.862624][  T787]  ? trace_contention_end (./include/trace/events/lock.h:121 (discriminator 22))
[   15.862628][  T787]  ? __mutex_lock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:3188 kernel/locking/mutex.c:89 kernel/locking/mutex.c:134 kernel/locking/mutex.c:649 kernel/locking/mutex.c:821)
[   15.862631][  T787]  ? __mutex_lock (kernel/locking/mutex.c:656 (discriminator 1) kernel/locking/mutex.c:821 (discriminator 1))
[   15.862634][  T787]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   15.862640][  T787]  ? ww_mutex_lock (kernel/locking/mutex.c:934)
[   15.862647][  T787]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   15.862651][  T787]  ? __rtnl_newlink (net/core/rtnetlink.c:4063)
[   15.862660][  T787]  rtnl_newlink (net/core/rtnetlink.c:4215)
[   15.862670][  T787]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   15.862673][  T787]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   15.862681][  T787]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   15.862684][  T787]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   15.862688][  T787]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   15.862691][  T787]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   15.862697][  T787]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   15.862701][  T787]  rtnetlink_rcv_msg (net/core/rtnetlink.c:7132)
[   15.862706][  T787]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   15.862708][  T787]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   15.862716][  T787]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   15.862719][  T787]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   15.862725][  T787]  netlink_rcv_skb (net/netlink/af_netlink.c:2556)
[   15.862729][  T787]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   15.862734][  T787]  ? netlink_ack (./include/linux/skbuff.h:2718)
[   15.862745][  T787]  ? netlink_deliver_tap (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) ./include/net/netns/generic.h:48 (discriminator 2) net/netlink/af_netlink.c:334 (discriminator 2))
[   15.862748][  T787]  ? netlink_deliver_tap (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) net/netlink/af_netlink.c:341 (discriminator 2))
[   15.862757][  T787]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1345)
[   15.862764][  T787]  ? netlink_attachskb (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[   15.862768][  T787]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   15.862776][  T787]  netlink_sendmsg (net/netlink/af_netlink.c:1900)
[   15.862782][  T787]  ? netlink_unicast (./include/net/net_namespace.h:422 (discriminator 7))
[   15.862789][  T787]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   15.862792][  T787]  ? __import_iovec (lib/iov_iter.c:1358 lib/iov_iter.c:1373)
[   15.862800][  T787]  __sock_sendmsg (net/socket.c:800 (discriminator 4) net/socket.c:815 (discriminator 4))
[   15.862805][  T787]  ____sys_sendmsg (net/socket.c:2713)
[   15.862809][  T787]  ? copy_msghdr_from_user (net/socket.c:2650)
[   15.862813][  T787]  ? sock_write_iter (net/socket.c:1269)
[   15.862815][  T787]  ? move_addr_to_kernel (net/socket.c:258)
[   15.862828][  T787]  ___sys_sendmsg (net/socket.c:2767)
[   15.862833][  T787]  ? copy_msghdr_from_user (net/socket.c:2619)
[   15.862863][  T787]  __sys_sendmsg (net/socket.c:2799)
[   15.862868][  T787]  ? __sys_sendmsg_sock (net/socket.c:2780)
[   15.862879][  T787]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   15.862884][  T787]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   15.862888][  T787]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   15.862893][  T787]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   15.862897][  T787] RIP: 0033:0x7f9466b3a54e
[   15.862902][  T787] Code: 4d 89 d8 e8 b4 bd 00 00 4c 8b 5d f8 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 11 c9 c3 0f 1f 80 00 00 00 00 48 8b 45 10 0f 05 <c9> c3 83 e2 39 83 fa 08 75 e7 e8 03 ff ff ff 0f 1f 00 f3 0f 1e fa
All code
========
   0:	4d 89 d8             	mov    %r11,%r8
   3:	e8 b4 bd 00 00       	call   0xbdbc
   8:	4c 8b 5d f8          	mov    -0x8(%rbp),%r11
   c:	41 8b 93 08 03 00 00 	mov    0x308(%r11),%edx
  13:	59                   	pop    %rcx
  14:	5e                   	pop    %rsi
  15:	48 83 f8 fc          	cmp    $0xfffffffffffffffc,%rax
  19:	74 11                	je     0x2c
  1b:	c9                   	leave
  1c:	c3                   	ret
  1d:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  24:	48 8b 45 10          	mov    0x10(%rbp),%rax
  28:	0f 05                	syscall
  2a:*	c9                   	leave		<-- trapping instruction
  2b:	c3                   	ret
  2c:	83 e2 39             	and    $0x39,%edx
  2f:	83 fa 08             	cmp    $0x8,%edx
  32:	75 e7                	jne    0x1b
  34:	e8 03 ff ff ff       	call   0xffffffffffffff3c
  39:	0f 1f 00             	nopl   (%rax)
  3c:	f3 0f 1e fa          	endbr64

Code starting with the faulting instruction
===========================================
   0:	c9                   	leave
   1:	c3                   	ret
   2:	83 e2 39             	and    $0x39,%edx
   5:	83 fa 08             	cmp    $0x8,%edx
   8:	75 e7                	jne    0xfffffffffffffff1
   a:	e8 03 ff ff ff       	call   0xffffffffffffff12
   f:	0f 1f 00             	nopl   (%rax)
  12:	f3 0f 1e fa          	endbr64
[   15.862905][  T787] RSP: 002b:00007fff4c99e750 EFLAGS: 00000202 ORIG_RAX: 000000000000002e
[   15.862910][  T787] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f9466b3a54e
[   15.862912][  T787] RDX: 0000000000000000 RSI: 00007fff4c99e800 RDI: 0000000000000005
[   15.862913][  T787] RBP: 00007fff4c99e760 R08: 0000000000000000 R09: 0000000000000000
[   15.862915][  T787] R10: 0000000000000000 R11: 0000000000000202 R12: 000000006a915cd6
[   15.862916][  T787] R13: 00000000004a1620 R14: 0000000000000000 R15: 00007fff4c99eec0
| [   17.266157][   T58] softirqs last disabled at (86408): br_port_carrier_check (./include/linux/spinlock.h:353 net/bridge/br_if.c:87)
| [   17.266160][   T58] Preemption disabled at:
| [   17.266161][   T58] 0x0
| [   17.266171][   T58] Tainted: [W]=WARN
[   17.266172][   T58] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   17.266174][   T58] Workqueue: events_unbound linkwatch_event
[   17.266177][   T58] Call Trace:
[   17.266179][   T58]  <TASK>
[   17.266181][   T58]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   17.266188][   T58]  __might_resched.cold (kernel/sched/core.c:9234)
[   17.266192][   T58]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   17.266196][   T58]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   17.266201][   T58]  __kmalloc_noprof (./include/linux/sched/mm.h:322 (discriminator 2) mm/slub.c:4636 (discriminator 2) mm/slub.c:4974 (discriminator 2) mm/slub.c:5413 (discriminator 2) mm/slub.c:5439 (discriminator 2))
[   17.266203][   T58]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   17.266210][   T58]  ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:58 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[   17.266213][   T58]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   17.266216][   T58]  put_chars (drivers/char/virtio_console.c:1176)
[   17.266218][   T58]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   17.266221][   T58]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   17.266224][   T58]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   17.266226][   T58]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   17.266229][   T58]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   17.266233][   T58]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   17.266237][   T58]  ? mark_usage (kernel/locking/lockdep.c:4690)
[   17.266239][   T58]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   17.266241][   T58]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   17.266245][   T58]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   17.266247][   T58]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   17.266252][   T58]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   17.266256][   T58]  console_emit_next_record (kernel/printk/printk.c:3183)
[   17.266260][   T58]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   17.266262][   T58]  ? console_flush_one_record (./include/linux/rcupdate.h:314 (discriminator 2) ./include/linux/srcu.h:439 (discriminator 2) kernel/printk/printk.c:291 (discriminator 2) kernel/printk/printk.c:3246 (discriminator 2))
[   17.266265][   T58]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   17.266267][   T58]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   17.266271][   T58]  console_flush_one_record (kernel/printk/printk.c:3268)
[   17.266275][   T58]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   17.266277][   T58]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   17.266283][   T58]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   17.266286][   T58]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   17.266288][   T58]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   17.266289][   T58]  ? lock_acquire (./include/linux/srcutree.h:374 ./include/linux/srcu.h:541 ./include/linux/srcu.h:645 ./include/trace/events/lock.h:23 ./include/trace/events/lock.h:23 kernel/locking/lockdep.c:5871)
[   17.266293][   T58]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   17.266295][   T58]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   17.266298][   T58]  vprintk_emit (kernel/printk/printk.c:2479)
[   17.266301][   T58]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   17.266303][   T58]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   17.266305][   T58]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   17.266309][   T58]  _printk (kernel/printk/printk.c:2504)
[   17.266312][   T58]  ? snapshot_read.cold (user.c:?)
[   17.266318][   T58]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   17.266322][   T58]  br_set_state (net/bridge/br_stp.c:57 (discriminator 2))
[   17.266326][   T58]  br_init_port (net/bridge/br_stp_if.c:39)
[   17.266329][   T58]  br_stp_enable_port (net/bridge/br_stp_if.c:93)
[   17.266331][   T58]  br_port_carrier_check (net/bridge/br_if.c:90)
[   17.266334][   T58]  br_device_event (net/bridge/br.c:101)
[   17.266338][   T58]  ? packet_sendmsg_spkt (af_packet.c:?)
[   17.266340][   T58]  ? nlmsg_notify (./include/net/netlink.h:1165 ./include/net/netlink.h:1184 net/netlink/af_netlink.c:2599)
[   17.266347][   T58]  notifier_call_chain (kernel/notifier.c:85)
[   17.266353][   T58]  netif_state_change (net/core/dev.c:1625)
[   17.266358][   T58]  ? call_netdevice_notifiers_info (./include/net/net_namespace.h:422 (discriminator 7))
[   17.266363][   T58]  ? linkwatch_do_dev (net/core/link_watch.c:182 net/core/link_watch.c:166)
[   17.266365][   T58]  __linkwatch_run_queue (net/core/link_watch.c:240)
[   17.266368][   T58]  ? linkwatch_do_dev (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[   17.266371][   T58]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   17.266375][   T58]  linkwatch_event (net/core/link_watch.c:314 (discriminator 11))
[   17.266378][   T58]  ? __linkwatch_run_queue (net/core/link_watch.c:213)
[   17.266381][   T58]  process_one_work (kernel/workqueue.c:3387)
[   17.266388][   T58]  ? __queue_delayed_work (kernel/workqueue.c:2622)
[   17.266391][   T58]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   17.266399][   T58]  worker_thread (kernel/workqueue.c:3470 kernel/workqueue.c:3551)
[   17.266410][   T58]  ? rescuer_thread (./include/linux/list.h:419 (discriminator 3))
[   17.266412][   T58]  kthread (kernel/kthread.c:436)
[   17.266415][   T58]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   17.266418][   T58]  ? kthread_affine_preferred (kernel/kthread.c:857)
[   17.266421][   T58]  ret_from_fork (arch/x86/kernel/process.c:158)
[   17.266425][   T58]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/vdso/vma.c:80 (discriminator 1))
[   17.266429][   T58]  ? __switch_to (arch/x86/kernel/process_64.c:403 arch/x86/kernel/process_64.c:663)
[   17.266432][   T58]  ? kthread_affine_preferred (kernel/kthread.c:857)
[   17.266435][   T58]  ret_from_fork_asm (arch/x86/entry/entry_64.S:245)
| [   18.480535][ T1013] softirqs last disabled at (17240): br_device_event (./include/linux/spinlock.h:353 net/bridge/br.c:119)
| [   18.480537][ T1013] Preemption disabled at:
| [   18.480538][ T1013] 0x0
| [   18.480548][ T1013] Tainted: [W]=WARN
[   18.480549][ T1013] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   18.480551][ T1013] Call Trace:
[   18.480553][ T1013]  <TASK>
[   18.480554][ T1013]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   18.480561][ T1013]  __might_resched.cold (kernel/sched/core.c:9234)
[   18.480565][ T1013]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   18.480570][ T1013]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   18.480574][ T1013]  __kmalloc_noprof (./include/linux/sched/mm.h:322 (discriminator 2) mm/slub.c:4636 (discriminator 2) mm/slub.c:4974 (discriminator 2) mm/slub.c:5413 (discriminator 2) mm/slub.c:5439 (discriminator 2))
[   18.480576][ T1013]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   18.480583][ T1013]  ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:58 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[   18.480585][ T1013]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   18.480590][ T1013]  put_chars (drivers/char/virtio_console.c:1176)
[   18.480592][ T1013]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   18.480593][ T1013]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   18.480597][ T1013]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   18.480602][ T1013]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   18.480610][ T1013]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   18.480613][ T1013]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   18.480615][ T1013]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   18.480619][ T1013]  console_emit_next_record (kernel/printk/printk.c:3183)
[   18.480623][ T1013]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   18.480624][ T1013]  ? console_flush_one_record (./include/linux/rcupdate.h:314 (discriminator 2) ./include/linux/srcu.h:439 (discriminator 2) kernel/printk/printk.c:291 (discriminator 2) kernel/printk/printk.c:3246 (discriminator 2))
[   18.480627][ T1013]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   18.480629][ T1013]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   18.480633][ T1013]  console_flush_one_record (kernel/printk/printk.c:3268)
[   18.480637][ T1013]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   18.480639][ T1013]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   18.480645][ T1013]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   18.480648][ T1013]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   18.480649][ T1013]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   18.480651][ T1013]  ? lock_acquire (./include/linux/srcutree.h:374 ./include/linux/srcu.h:541 ./include/linux/srcu.h:645 ./include/trace/events/lock.h:23 ./include/trace/events/lock.h:23 kernel/locking/lockdep.c:5871)
[   18.480655][ T1013]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   18.480656][ T1013]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   18.480659][ T1013]  vprintk_emit (kernel/printk/printk.c:2479)
[   18.480662][ T1013]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   18.480664][ T1013]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   18.480666][ T1013]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   18.480671][ T1013]  _printk (kernel/printk/printk.c:2504)
[   18.480675][ T1013]  ? snapshot_read.cold (user.c:?)
[   18.480680][ T1013]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   18.480684][ T1013]  br_set_state (net/bridge/br_stp.c:57 (discriminator 2))
[   18.480688][ T1013]  br_init_port (net/bridge/br_stp_if.c:39)
[   18.480691][ T1013]  br_stp_enable_port (net/bridge/br_stp_if.c:93)
[   18.480692][ T1013]  br_device_event (net/bridge/br.c:120)
[   18.480695][ T1013]  ? packet_sendmsg_spkt (af_packet.c:?)
[   18.480697][ T1013]  ? nlmsg_notify (./include/net/netlink.h:1165 ./include/net/netlink.h:1184 net/netlink/af_netlink.c:2599)
[   18.480704][ T1013]  notifier_call_chain (kernel/notifier.c:85)
[   18.480710][ T1013]  __dev_notify_flags (net/core/dev.c:2313 net/core/dev.c:2327 net/core/dev.c:9853)
[   18.480715][ T1013]  ? netif_change_name (net/core/dev.c:1517)
[   18.480719][ T1013]  ? netif_set_allmulti (./include/net/netdev_lock.h:33)
[   18.480721][ T1013]  ? kernel_text_address (kernel/extable.c:125 kernel/extable.c:94)
[   18.480724][ T1013]  ? __kernel_text_address (kernel/extable.c:79)
[   18.480725][ T1013]  ? write_profile (profile.c:?)
[   18.480730][ T1013]  netif_change_flags (net/core/dev.c:9882)
[   18.480734][ T1013]  do_setlink.isra.0 (net/core/rtnetlink.c:3266 (discriminator 1))
[   18.480738][ T1013]  ? stack_trace_save (kernel/stacktrace.c:122 (discriminator 1))
[   18.480740][ T1013]  ? rtnl_link_get_size (net/core/rtnetlink.c:747)
[   18.480741][ T1013]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:388 kernel/rcu/update.c:380)
[   18.480743][ T1013]  ? stack_depot_save_flags (lib/stackdepot.c:609 (discriminator 2) lib/stackdepot.c:676 (discriminator 2))
[   18.480746][ T1013]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   18.480748][ T1013]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   18.480750][ T1013]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   18.480752][ T1013]  ? kasan_save_stack (mm/kasan/common.c:58)
[   18.480755][ T1013]  ? kasan_save_stack (mm/kasan/common.c:57)
[   18.480756][ T1013]  ? kasan_save_track (mm/kasan/common.c:78)
[   18.480757][ T1013]  ? __kasan_kmalloc (mm/kasan/common.c:398 mm/kasan/common.c:415)
[   18.480759][ T1013]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   18.480761][ T1013]  ? snd_ac97_proc_read_main (sound/pci/ac97/ac97_proc.c:320)
[   18.480764][ T1013]  ? ___sys_sendmsg (net/socket.c:2758)
[   18.480768][ T1013]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   18.480770][ T1013]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   18.480773][ T1013]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   18.480775][ T1013]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   18.480776][ T1013]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   18.480777][ T1013]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   18.480779][ T1013]  ? trace_contention_end (./include/trace/events/lock.h:121 (discriminator 22))
[   18.480781][ T1013]  ? __mutex_lock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:3188 kernel/locking/mutex.c:89 kernel/locking/mutex.c:134 kernel/locking/mutex.c:649 kernel/locking/mutex.c:821)
[   18.480784][ T1013]  ? __mutex_lock (kernel/locking/mutex.c:656 (discriminator 1) kernel/locking/mutex.c:821 (discriminator 1))
[   18.480786][ T1013]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   18.480789][ T1013]  ? ww_mutex_lock (kernel/locking/mutex.c:934)
[   18.480792][ T1013]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   18.480795][ T1013]  ? __rtnl_newlink (net/core/rtnetlink.c:4063)
[   18.480800][ T1013]  rtnl_newlink (net/core/rtnetlink.c:4215)
[   18.480805][ T1013]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   18.480807][ T1013]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   18.480812][ T1013]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   18.480813][ T1013]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   18.480816][ T1013]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   18.480818][ T1013]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   18.480821][ T1013]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   18.480823][ T1013]  rtnetlink_rcv_msg (net/core/rtnetlink.c:7132)
[   18.480826][ T1013]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   18.480828][ T1013]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   18.480832][ T1013]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   18.480834][ T1013]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   18.480838][ T1013]  netlink_rcv_skb (net/netlink/af_netlink.c:2556)
[   18.480840][ T1013]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   18.480843][ T1013]  ? netlink_ack (./include/linux/skbuff.h:2718)
[   18.480849][ T1013]  ? netlink_deliver_tap (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) ./include/net/netns/generic.h:48 (discriminator 2) net/netlink/af_netlink.c:334 (discriminator 2))
[   18.480851][ T1013]  ? netlink_deliver_tap (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) net/netlink/af_netlink.c:341 (discriminator 2))
[   18.480856][ T1013]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1345)
[   18.480860][ T1013]  ? netlink_attachskb (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[   18.480862][ T1013]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   18.480866][ T1013]  netlink_sendmsg (net/netlink/af_netlink.c:1900)
[   18.480870][ T1013]  ? netlink_unicast (./include/net/net_namespace.h:422 (discriminator 7))
[   18.480874][ T1013]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   18.480876][ T1013]  ? __import_iovec (lib/iov_iter.c:1358 lib/iov_iter.c:1373)
[   18.480881][ T1013]  __sock_sendmsg (net/socket.c:800 (discriminator 4) net/socket.c:815 (discriminator 4))
[   18.480884][ T1013]  ____sys_sendmsg (net/socket.c:2713)
[   18.480886][ T1013]  ? copy_msghdr_from_user (net/socket.c:2650)
[   18.480889][ T1013]  ? sock_write_iter (net/socket.c:1269)
[   18.480890][ T1013]  ? move_addr_to_kernel (net/socket.c:258)
[   18.480897][ T1013]  ___sys_sendmsg (net/socket.c:2767)
[   18.480900][ T1013]  ? copy_msghdr_from_user (net/socket.c:2619)
[   18.480916][ T1013]  __sys_sendmsg (net/socket.c:2799)
[   18.480919][ T1013]  ? __sys_sendmsg_sock (net/socket.c:2780)
[   18.480925][ T1013]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   18.480928][ T1013]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   18.480931][ T1013]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   18.480934][ T1013]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   18.480936][ T1013] RIP: 0033:0x7f99bf90d54e
[   18.480938][ T1013] Code: 4d 89 d8 e8 b4 bd 00 00 4c 8b 5d f8 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 11 c9 c3 0f 1f 80 00 00 00 00 48 8b 45 10 0f 05 <c9> c3 83 e2 39 83 fa 08 75 e7 e8 03 ff ff ff 0f 1f 00 f3 0f 1e fa
All code
========
   0:	4d 89 d8             	mov    %r11,%r8
   3:	e8 b4 bd 00 00       	call   0xbdbc
   8:	4c 8b 5d f8          	mov    -0x8(%rbp),%r11
   c:	41 8b 93 08 03 00 00 	mov    0x308(%r11),%edx
  13:	59                   	pop    %rcx
  14:	5e                   	pop    %rsi
  15:	48 83 f8 fc          	cmp    $0xfffffffffffffffc,%rax
  19:	74 11                	je     0x2c
  1b:	c9                   	leave
  1c:	c3                   	ret
  1d:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  24:	48 8b 45 10          	mov    0x10(%rbp),%rax
  28:	0f 05                	syscall
  2a:*	c9                   	leave		<-- trapping instruction
  2b:	c3                   	ret
  2c:	83 e2 39             	and    $0x39,%edx
  2f:	83 fa 08             	cmp    $0x8,%edx
  32:	75 e7                	jne    0x1b
  34:	e8 03 ff ff ff       	call   0xffffffffffffff3c
  39:	0f 1f 00             	nopl   (%rax)
  3c:	f3 0f 1e fa          	endbr64

Code starting with the faulting instruction
===========================================
   0:	c9                   	leave
   1:	c3                   	ret
   2:	83 e2 39             	and    $0x39,%edx
   5:	83 fa 08             	cmp    $0x8,%edx
   8:	75 e7                	jne    0xfffffffffffffff1
   a:	e8 03 ff ff ff       	call   0xffffffffffffff12
   f:	0f 1f 00             	nopl   (%rax)
  12:	f3 0f 1e fa          	endbr64
[   18.480940][ T1013] RSP: 002b:00007ffebca92f80 EFLAGS: 00000202 ORIG_RAX: 000000000000002e
[   18.480943][ T1013] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f99bf90d54e
[   18.480944][ T1013] RDX: 0000000000000000 RSI: 00007ffebca93030 RDI: 0000000000000005
[   18.480945][ T1013] RBP: 00007ffebca92f90 R08: 0000000000000000 R09: 0000000000000000
[   18.480946][ T1013] R10: 0000000000000000 R11: 0000000000000202 R12: 000000006a915cd8
[   18.480947][ T1013] R13: 00000000004a1620 R14: 0000000000000000 R15: 00007ffebca936f0
| [   19.570620][ T1113] softirqs last disabled at (21740): br_device_event (./include/linux/spinlock.h:353 net/bridge/br.c:119)
| [   19.570623][ T1113] Preemption disabled at:
| [   19.570623][ T1113] 0x0
| [   19.570634][ T1113] Tainted: [W]=WARN
[   19.570634][ T1113] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   19.570636][ T1113] Call Trace:
[   19.570637][ T1113]  <TASK>
[   19.570639][ T1113]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   19.570646][ T1113]  __might_resched.cold (kernel/sched/core.c:9234)
[   19.570650][ T1113]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   19.570654][ T1113]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   19.570658][ T1113]  __kmalloc_noprof (./include/linux/sched/mm.h:322 (discriminator 2) mm/slub.c:4636 (discriminator 2) mm/slub.c:4974 (discriminator 2) mm/slub.c:5413 (discriminator 2) mm/slub.c:5439 (discriminator 2))
[   19.570660][ T1113]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   19.570667][ T1113]  ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:58 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[   19.570670][ T1113]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   19.570674][ T1113]  put_chars (drivers/char/virtio_console.c:1176)
[   19.570676][ T1113]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   19.570677][ T1113]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   19.570681][ T1113]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   19.570686][ T1113]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   19.570694][ T1113]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   19.570697][ T1113]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   19.570699][ T1113]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   19.570703][ T1113]  console_emit_next_record (kernel/printk/printk.c:3183)
[   19.570707][ T1113]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   19.570708][ T1113]  ? console_flush_one_record (./include/linux/rcupdate.h:314 (discriminator 2) ./include/linux/srcu.h:439 (discriminator 2) kernel/printk/printk.c:291 (discriminator 2) kernel/printk/printk.c:3246 (discriminator 2))
[   19.570712][ T1113]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   19.570713][ T1113]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   19.570717][ T1113]  console_flush_one_record (kernel/printk/printk.c:3268)
[   19.570721][ T1113]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   19.570723][ T1113]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   19.570729][ T1113]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   19.570732][ T1113]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   19.570733][ T1113]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   19.570735][ T1113]  ? lock_acquire (./include/linux/srcutree.h:374 ./include/linux/srcu.h:541 ./include/linux/srcu.h:645 ./include/trace/events/lock.h:23 ./include/trace/events/lock.h:23 kernel/locking/lockdep.c:5871)
[   19.570739][ T1113]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   19.570740][ T1113]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   19.570743][ T1113]  vprintk_emit (kernel/printk/printk.c:2479)
[   19.570746][ T1113]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   19.570749][ T1113]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   19.570750][ T1113]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   19.570755][ T1113]  _printk (kernel/printk/printk.c:2504)
[   19.570759][ T1113]  ? snapshot_read.cold (user.c:?)
[   19.570764][ T1113]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   19.570768][ T1113]  br_set_state (net/bridge/br_stp.c:57 (discriminator 2))
[   19.570773][ T1113]  br_init_port (net/bridge/br_stp_if.c:39)
[   19.570775][ T1113]  br_stp_enable_port (net/bridge/br_stp_if.c:93)
[   19.570777][ T1113]  br_device_event (net/bridge/br.c:120)
[   19.570780][ T1113]  ? packet_sendmsg_spkt (af_packet.c:?)
[   19.570781][ T1113]  ? nlmsg_notify (./include/net/netlink.h:1165 ./include/net/netlink.h:1184 net/netlink/af_netlink.c:2599)
[   19.570788][ T1113]  notifier_call_chain (kernel/notifier.c:85)
[   19.570794][ T1113]  __dev_notify_flags (net/core/dev.c:2313 net/core/dev.c:2327 net/core/dev.c:9853)
[   19.570799][ T1113]  ? netif_change_name (net/core/dev.c:1517)
[   19.570803][ T1113]  ? netif_set_allmulti (./include/net/netdev_lock.h:33)
[   19.570805][ T1113]  ? kernel_text_address (kernel/extable.c:125 kernel/extable.c:94)
[   19.570808][ T1113]  ? __kernel_text_address (kernel/extable.c:79)
[   19.570810][ T1113]  ? write_profile (profile.c:?)
[   19.570815][ T1113]  netif_change_flags (net/core/dev.c:9882)
[   19.570818][ T1113]  do_setlink.isra.0 (net/core/rtnetlink.c:3266 (discriminator 1))
[   19.570822][ T1113]  ? stack_trace_save (kernel/stacktrace.c:122 (discriminator 1))
[   19.570824][ T1113]  ? rtnl_link_get_size (net/core/rtnetlink.c:747)
[   19.570825][ T1113]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:388 kernel/rcu/update.c:380)
[   19.570827][ T1113]  ? stack_depot_save_flags (lib/stackdepot.c:609 (discriminator 2) lib/stackdepot.c:676 (discriminator 2))
[   19.570831][ T1113]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   19.570832][ T1113]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   19.570834][ T1113]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   19.570837][ T1113]  ? kasan_save_stack (mm/kasan/common.c:58)
[   19.570839][ T1113]  ? kasan_save_stack (mm/kasan/common.c:57)
[   19.570840][ T1113]  ? kasan_save_track (mm/kasan/common.c:78)
[   19.570841][ T1113]  ? __kasan_kmalloc (mm/kasan/common.c:398 mm/kasan/common.c:415)
[   19.570844][ T1113]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   19.570846][ T1113]  ? snd_ac97_proc_read_main (sound/pci/ac97/ac97_proc.c:320)
[   19.570849][ T1113]  ? ___sys_sendmsg (net/socket.c:2758)
[   19.570852][ T1113]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   19.570854][ T1113]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   19.570857][ T1113]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   19.570859][ T1113]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   19.570860][ T1113]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   19.570861][ T1113]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   19.570863][ T1113]  ? trace_contention_end (./include/trace/events/lock.h:121 (discriminator 22))
[   19.570865][ T1113]  ? __mutex_lock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:3188 kernel/locking/mutex.c:89 kernel/locking/mutex.c:134 kernel/locking/mutex.c:649 kernel/locking/mutex.c:821)
[   19.570868][ T1113]  ? __mutex_lock (kernel/locking/mutex.c:656 (discriminator 1) kernel/locking/mutex.c:821 (discriminator 1))
[   19.570870][ T1113]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   19.570873][ T1113]  ? ww_mutex_lock (kernel/locking/mutex.c:934)
[   19.570877][ T1113]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   19.570879][ T1113]  ? __rtnl_newlink (net/core/rtnetlink.c:4063)
[   19.570884][ T1113]  rtnl_newlink (net/core/rtnetlink.c:4215)
[   19.570890][ T1113]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   19.570891][ T1113]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   19.570896][ T1113]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   19.570898][ T1113]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   19.570900][ T1113]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   19.570902][ T1113]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   19.570906][ T1113]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   19.570908][ T1113]  rtnetlink_rcv_msg (net/core/rtnetlink.c:7132)
[   19.570911][ T1113]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   19.570912][ T1113]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   19.570917][ T1113]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   19.570919][ T1113]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   19.570922][ T1113]  netlink_rcv_skb (net/netlink/af_netlink.c:2556)
[   19.570924][ T1113]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   19.570927][ T1113]  ? netlink_ack (./include/linux/skbuff.h:2718)
[   19.570934][ T1113]  ? netlink_deliver_tap (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) ./include/net/netns/generic.h:48 (discriminator 2) net/netlink/af_netlink.c:334 (discriminator 2))
[   19.570936][ T1113]  ? netlink_deliver_tap (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) net/netlink/af_netlink.c:341 (discriminator 2))
[   19.570940][ T1113]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1345)
[   19.570944][ T1113]  ? netlink_attachskb (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[   19.570947][ T1113]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   19.570951][ T1113]  netlink_sendmsg (net/netlink/af_netlink.c:1900)
[   19.570955][ T1113]  ? netlink_unicast (./include/net/net_namespace.h:422 (discriminator 7))
[   19.570959][ T1113]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   19.570960][ T1113]  ? __import_iovec (lib/iov_iter.c:1358 lib/iov_iter.c:1373)
[   19.570966][ T1113]  __sock_sendmsg (net/socket.c:800 (discriminator 4) net/socket.c:815 (discriminator 4))
[   19.570969][ T1113]  ____sys_sendmsg (net/socket.c:2713)
[   19.570971][ T1113]  ? copy_msghdr_from_user (net/socket.c:2650)
[   19.570973][ T1113]  ? sock_write_iter (net/socket.c:1269)
[   19.570975][ T1113]  ? move_addr_to_kernel (net/socket.c:258)
[   19.570982][ T1113]  ___sys_sendmsg (net/socket.c:2767)
[   19.570985][ T1113]  ? copy_msghdr_from_user (net/socket.c:2619)
[   19.571001][ T1113]  __sys_sendmsg (net/socket.c:2799)
[   19.571004][ T1113]  ? __sys_sendmsg_sock (net/socket.c:2780)
[   19.571010][ T1113]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   19.571013][ T1113]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   19.571016][ T1113]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   19.571019][ T1113]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   19.571021][ T1113] RIP: 0033:0x7f8cd941154e
[   19.571023][ T1113] Code: 4d 89 d8 e8 b4 bd 00 00 4c 8b 5d f8 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 11 c9 c3 0f 1f 80 00 00 00 00 48 8b 45 10 0f 05 <c9> c3 83 e2 39 83 fa 08 75 e7 e8 03 ff ff ff 0f 1f 00 f3 0f 1e fa
All code
========
   0:	4d 89 d8             	mov    %r11,%r8
   3:	e8 b4 bd 00 00       	call   0xbdbc
   8:	4c 8b 5d f8          	mov    -0x8(%rbp),%r11
   c:	41 8b 93 08 03 00 00 	mov    0x308(%r11),%edx
  13:	59                   	pop    %rcx
  14:	5e                   	pop    %rsi
  15:	48 83 f8 fc          	cmp    $0xfffffffffffffffc,%rax
  19:	74 11                	je     0x2c
  1b:	c9                   	leave
  1c:	c3                   	ret
  1d:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  24:	48 8b 45 10          	mov    0x10(%rbp),%rax
  28:	0f 05                	syscall
  2a:*	c9                   	leave		<-- trapping instruction
  2b:	c3                   	ret
  2c:	83 e2 39             	and    $0x39,%edx
  2f:	83 fa 08             	cmp    $0x8,%edx
  32:	75 e7                	jne    0x1b
  34:	e8 03 ff ff ff       	call   0xffffffffffffff3c
  39:	0f 1f 00             	nopl   (%rax)
  3c:	f3 0f 1e fa          	endbr64

Code starting with the faulting instruction
===========================================
   0:	c9                   	leave
   1:	c3                   	ret
   2:	83 e2 39             	and    $0x39,%edx
   5:	83 fa 08             	cmp    $0x8,%edx
   8:	75 e7                	jne    0xfffffffffffffff1
   a:	e8 03 ff ff ff       	call   0xffffffffffffff12
   f:	0f 1f 00             	nopl   (%rax)
  12:	f3 0f 1e fa          	endbr64
[   19.571025][ T1113] RSP: 002b:00007fff542287f0 EFLAGS: 00000202 ORIG_RAX: 000000000000002e
[   19.571027][ T1113] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f8cd941154e
[   19.571029][ T1113] RDX: 0000000000000000 RSI: 00007fff542288a0 RDI: 0000000000000005
[   19.571030][ T1113] RBP: 00007fff54228800 R08: 0000000000000000 R09: 0000000000000000
[   19.571031][ T1113] R10: 0000000000000000 R11: 0000000000000202 R12: 000000006a915cd9
[   19.571031][ T1113] R13: 00000000004a1620 R14: 0000000000000000 R15: 00007fff54228f60
| [   21.353606][ T1238] softirqs last disabled at (12716): br_device_event (./include/linux/spinlock.h:353 net/bridge/br.c:109)
| [   21.353609][ T1238] Preemption disabled at:
| [   21.353609][ T1238] 0x0
| [   21.353620][ T1238] Tainted: [W]=WARN
[   21.353621][ T1238] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   21.353622][ T1238] Call Trace:
[   21.353624][ T1238]  <TASK>
[   21.353625][ T1238]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   21.353632][ T1238]  __might_resched.cold (kernel/sched/core.c:9234)
[   21.353636][ T1238]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   21.353641][ T1238]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   21.353645][ T1238]  __kmalloc_noprof (./include/linux/sched/mm.h:322 (discriminator 2) mm/slub.c:4636 (discriminator 2) mm/slub.c:4974 (discriminator 2) mm/slub.c:5413 (discriminator 2) mm/slub.c:5439 (discriminator 2))
[   21.353647][ T1238]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   21.353653][ T1238]  ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:58 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[   21.353656][ T1238]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   21.353660][ T1238]  put_chars (drivers/char/virtio_console.c:1176)
[   21.353662][ T1238]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   21.353669][ T1238]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   21.353676][ T1238]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   21.353679][ T1238]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   21.353684][ T1238]  console_emit_next_record (kernel/printk/printk.c:3183)
[   21.353688][ T1238]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   21.353690][ T1238]  ? console_flush_one_record (./include/linux/rcupdate.h:314 (discriminator 2) ./include/linux/srcu.h:439 (discriminator 2) kernel/printk/printk.c:291 (discriminator 2) kernel/printk/printk.c:3246 (discriminator 2))
[   21.353693][ T1238]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   21.353696][ T1238]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   21.353700][ T1238]  console_flush_one_record (kernel/printk/printk.c:3268)
[   21.353704][ T1238]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   21.353706][ T1238]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   21.353711][ T1238]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   21.353714][ T1238]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   21.353716][ T1238]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   21.353717][ T1238]  ? lock_acquire (./include/linux/srcutree.h:374 ./include/linux/srcu.h:541 ./include/linux/srcu.h:645 ./include/trace/events/lock.h:23 ./include/trace/events/lock.h:23 kernel/locking/lockdep.c:5871)
[   21.353721][ T1238]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   21.353723][ T1238]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   21.353726][ T1238]  vprintk_emit (kernel/printk/printk.c:2479)
[   21.353729][ T1238]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   21.353730][ T1238]  ? mark_held_locks (kernel/locking/lockdep.c:4341)
[   21.353732][ T1238]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   21.353735][ T1238]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   21.353739][ T1238]  _printk (kernel/printk/printk.c:2504)
[   21.353743][ T1238]  ? snapshot_read.cold (user.c:?)
[   21.353750][ T1238]  br_set_state (net/bridge/br_stp.c:57 (discriminator 2))
[   21.353755][ T1238]  br_stp_disable_port (net/bridge/br_stp_if.c:106)
[   21.353758][ T1238]  br_device_event (net/bridge/br.c:111)
[   21.353760][ T1238]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:211 (discriminator 1) kernel/locking/spinlock.c:221 (discriminator 1))
[   21.353765][ T1238]  ? packet_sendmsg_spkt (af_packet.c:?)
[   21.353770][ T1238]  notifier_call_chain (kernel/notifier.c:85)
[   21.353776][ T1238]  __dev_notify_flags (net/core/dev.c:2313 net/core/dev.c:2327 net/core/dev.c:9855)
[   21.353781][ T1238]  ? netif_change_name (net/core/dev.c:1517)
[   21.353785][ T1238]  ? netif_set_allmulti (./include/net/netdev_lock.h:33)
[   21.353788][ T1238]  ? __kernel_text_address (kernel/extable.c:79)
[   21.353790][ T1238]  ? write_profile (profile.c:?)
[   21.353795][ T1238]  netif_change_flags (net/core/dev.c:9882)
[   21.353799][ T1238]  do_setlink.isra.0 (net/core/rtnetlink.c:3266 (discriminator 1))
[   21.353802][ T1238]  ? stack_trace_save (kernel/stacktrace.c:122 (discriminator 1))
[   21.353805][ T1238]  ? rtnl_link_get_size (net/core/rtnetlink.c:747)
[   21.353806][ T1238]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:388 kernel/rcu/update.c:380)
[   21.353808][ T1238]  ? stack_depot_save_flags (lib/stackdepot.c:609 (discriminator 2) lib/stackdepot.c:676 (discriminator 2))
[   21.353811][ T1238]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   21.353813][ T1238]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   21.353815][ T1238]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   21.353818][ T1238]  ? kasan_save_stack (mm/kasan/common.c:58)
[   21.353820][ T1238]  ? kasan_save_stack (mm/kasan/common.c:57)
[   21.353821][ T1238]  ? kasan_save_track (mm/kasan/common.c:78)
[   21.353822][ T1238]  ? __kasan_kmalloc (mm/kasan/common.c:398 mm/kasan/common.c:415)
[   21.353825][ T1238]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   21.353827][ T1238]  ? snd_ac97_proc_read_main (sound/pci/ac97/ac97_proc.c:320)
[   21.353830][ T1238]  ? ___sys_sendmsg (net/socket.c:2758)
[   21.353833][ T1238]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   21.353835][ T1238]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   21.353838][ T1238]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   21.353840][ T1238]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   21.353841][ T1238]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   21.353842][ T1238]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   21.353844][ T1238]  ? trace_contention_end (./include/trace/events/lock.h:121 (discriminator 22))
[   21.353846][ T1238]  ? __mutex_lock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:3188 kernel/locking/mutex.c:89 kernel/locking/mutex.c:134 kernel/locking/mutex.c:649 kernel/locking/mutex.c:821)
[   21.353848][ T1238]  ? __mutex_lock (kernel/locking/mutex.c:656 (discriminator 1) kernel/locking/mutex.c:821 (discriminator 1))
[   21.353849][ T1238]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   21.353853][ T1238]  ? ww_mutex_lock (kernel/locking/mutex.c:934)
[   21.353856][ T1238]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   21.353859][ T1238]  ? __rtnl_newlink (net/core/rtnetlink.c:4063)
[   21.353864][ T1238]  rtnl_newlink (net/core/rtnetlink.c:4215)
[   21.353869][ T1238]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   21.353871][ T1238]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   21.353875][ T1238]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   21.353877][ T1238]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   21.353880][ T1238]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   21.353881][ T1238]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   21.353885][ T1238]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   21.353887][ T1238]  rtnetlink_rcv_msg (net/core/rtnetlink.c:7132)
[   21.353890][ T1238]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   21.353892][ T1238]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   21.353896][ T1238]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   21.353898][ T1238]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   21.353901][ T1238]  netlink_rcv_skb (net/netlink/af_netlink.c:2556)
[   21.353905][ T1238]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   21.353908][ T1238]  ? netlink_ack (./include/linux/skbuff.h:2718)
[   21.353914][ T1238]  ? netlink_deliver_tap (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) ./include/net/netns/generic.h:48 (discriminator 2) net/netlink/af_netlink.c:334 (discriminator 2))
[   21.353916][ T1238]  ? netlink_deliver_tap (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) net/netlink/af_netlink.c:341 (discriminator 2))
[   21.353921][ T1238]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1345)
[   21.353925][ T1238]  ? netlink_attachskb (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[   21.353927][ T1238]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   21.353931][ T1238]  netlink_sendmsg (net/netlink/af_netlink.c:1900)
[   21.353935][ T1238]  ? netlink_unicast (./include/net/net_namespace.h:422 (discriminator 7))
[   21.353939][ T1238]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   21.353941][ T1238]  ? __import_iovec (lib/iov_iter.c:1358 lib/iov_iter.c:1373)
[   21.353946][ T1238]  __sock_sendmsg (net/socket.c:800 (discriminator 4) net/socket.c:815 (discriminator 4))
[   21.353949][ T1238]  ____sys_sendmsg (net/socket.c:2713)
[   21.353951][ T1238]  ? copy_msghdr_from_user (net/socket.c:2650)
[   21.353954][ T1238]  ? sock_write_iter (net/socket.c:1269)
[   21.353955][ T1238]  ? move_addr_to_kernel (net/socket.c:258)
[   21.353963][ T1238]  ___sys_sendmsg (net/socket.c:2767)
[   21.353965][ T1238]  ? copy_msghdr_from_user (net/socket.c:2619)
[   21.353981][ T1238]  __sys_sendmsg (net/socket.c:2799)
[   21.353984][ T1238]  ? __sys_sendmsg_sock (net/socket.c:2780)
[   21.353991][ T1238]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   21.353994][ T1238]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   21.353996][ T1238]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   21.353999][ T1238]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   21.354002][ T1238] RIP: 0033:0x7f0d1f19f54e
[   21.354004][ T1238] Code: 4d 89 d8 e8 b4 bd 00 00 4c 8b 5d f8 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 11 c9 c3 0f 1f 80 00 00 00 00 48 8b 45 10 0f 05 <c9> c3 83 e2 39 83 fa 08 75 e7 e8 03 ff ff ff 0f 1f 00 f3 0f 1e fa
All code
========
   0:	4d 89 d8             	mov    %r11,%r8
   3:	e8 b4 bd 00 00       	call   0xbdbc
   8:	4c 8b 5d f8          	mov    -0x8(%rbp),%r11
   c:	41 8b 93 08 03 00 00 	mov    0x308(%r11),%edx
  13:	59                   	pop    %rcx
  14:	5e                   	pop    %rsi
  15:	48 83 f8 fc          	cmp    $0xfffffffffffffffc,%rax
  19:	74 11                	je     0x2c
  1b:	c9                   	leave
  1c:	c3                   	ret
  1d:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  24:	48 8b 45 10          	mov    0x10(%rbp),%rax
  28:	0f 05                	syscall
  2a:*	c9                   	leave		<-- trapping instruction
  2b:	c3                   	ret
  2c:	83 e2 39             	and    $0x39,%edx
  2f:	83 fa 08             	cmp    $0x8,%edx
  32:	75 e7                	jne    0x1b
  34:	e8 03 ff ff ff       	call   0xffffffffffffff3c
  39:	0f 1f 00             	nopl   (%rax)
  3c:	f3 0f 1e fa          	endbr64

Code starting with the faulting instruction
===========================================
   0:	c9                   	leave
   1:	c3                   	ret
   2:	83 e2 39             	and    $0x39,%edx
   5:	83 fa 08             	cmp    $0x8,%edx
   8:	75 e7                	jne    0xfffffffffffffff1
   a:	e8 03 ff ff ff       	call   0xffffffffffffff12
   f:	0f 1f 00             	nopl   (%rax)
  12:	f3 0f 1e fa          	endbr64
[   21.354005][ T1238] RSP: 002b:00007fff8bed2b60 EFLAGS: 00000202 ORIG_RAX: 000000000000002e
[   21.354008][ T1238] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f0d1f19f54e
[   21.354010][ T1238] RDX: 0000000000000000 RSI: 00007fff8bed2c10 RDI: 0000000000000005
[   21.354011][ T1238] RBP: 00007fff8bed2b70 R08: 0000000000000000 R09: 0000000000000000
[   21.354011][ T1238] R10: 0000000000000000 R11: 0000000000000202 R12: 000000006a915cdb
[   21.354012][ T1238] R13: 00000000004a1620 R14: 0000000000000000 R15: 00007fff8bed32d0
| [   22.412177][ T1330] softirqs last disabled at (15276): br_device_event (./include/linux/spinlock.h:353 net/bridge/br.c:109)
| [   22.412179][ T1330] Preemption disabled at:
| [   22.412180][ T1330] 0x0
| [   22.412190][ T1330] Tainted: [W]=WARN
[   22.412191][ T1330] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   22.412192][ T1330] Call Trace:
[   22.412194][ T1330]  <TASK>
[   22.412195][ T1330]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   22.412202][ T1330]  __might_resched.cold (kernel/sched/core.c:9234)
[   22.412207][ T1330]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   22.412211][ T1330]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   22.412216][ T1330]  __kmalloc_noprof (./include/linux/sched/mm.h:322 (discriminator 2) mm/slub.c:4636 (discriminator 2) mm/slub.c:4974 (discriminator 2) mm/slub.c:5413 (discriminator 2) mm/slub.c:5439 (discriminator 2))
[   22.412218][ T1330]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   22.412224][ T1330]  ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:58 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[   22.412227][ T1330]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   22.412231][ T1330]  put_chars (drivers/char/virtio_console.c:1176)
[   22.412233][ T1330]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   22.412240][ T1330]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   22.412248][ T1330]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   22.412251][ T1330]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   22.412256][ T1330]  console_emit_next_record (kernel/printk/printk.c:3183)
[   22.412260][ T1330]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   22.412261][ T1330]  ? console_flush_one_record (./include/linux/rcupdate.h:314 (discriminator 2) ./include/linux/srcu.h:439 (discriminator 2) kernel/printk/printk.c:291 (discriminator 2) kernel/printk/printk.c:3246 (discriminator 2))
[   22.412265][ T1330]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   22.412268][ T1330]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   22.412272][ T1330]  console_flush_one_record (kernel/printk/printk.c:3268)
[   22.412276][ T1330]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   22.412278][ T1330]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   22.412283][ T1330]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   22.412286][ T1330]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   22.412288][ T1330]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   22.412290][ T1330]  ? lock_acquire (./include/linux/srcutree.h:374 ./include/linux/srcu.h:541 ./include/linux/srcu.h:645 ./include/trace/events/lock.h:23 ./include/trace/events/lock.h:23 kernel/locking/lockdep.c:5871)
[   22.412294][ T1330]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   22.412296][ T1330]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   22.412298][ T1330]  vprintk_emit (kernel/printk/printk.c:2479)
[   22.412302][ T1330]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   22.412303][ T1330]  ? mark_held_locks (kernel/locking/lockdep.c:4341)
[   22.412305][ T1330]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   22.412307][ T1330]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   22.412312][ T1330]  _printk (kernel/printk/printk.c:2504)
[   22.412316][ T1330]  ? snapshot_read.cold (user.c:?)
[   22.412323][ T1330]  br_set_state (net/bridge/br_stp.c:57 (discriminator 2))
[   22.412328][ T1330]  br_stp_disable_port (net/bridge/br_stp_if.c:106)
[   22.412332][ T1330]  br_device_event (net/bridge/br.c:111)
[   22.412334][ T1330]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:211 (discriminator 1) kernel/locking/spinlock.c:221 (discriminator 1))
[   22.412338][ T1330]  ? packet_sendmsg_spkt (af_packet.c:?)
[   22.412344][ T1330]  notifier_call_chain (kernel/notifier.c:85)
[   22.412350][ T1330]  __dev_notify_flags (net/core/dev.c:2313 net/core/dev.c:2327 net/core/dev.c:9855)
[   22.412355][ T1330]  ? netif_change_name (net/core/dev.c:1517)
[   22.412359][ T1330]  ? netif_set_allmulti (./include/net/netdev_lock.h:33)
[   22.412362][ T1330]  ? __kernel_text_address (kernel/extable.c:79)
[   22.412364][ T1330]  ? write_profile (profile.c:?)
[   22.412369][ T1330]  netif_change_flags (net/core/dev.c:9882)
[   22.412373][ T1330]  do_setlink.isra.0 (net/core/rtnetlink.c:3266 (discriminator 1))
[   22.412377][ T1330]  ? stack_trace_save (kernel/stacktrace.c:122 (discriminator 1))
[   22.412379][ T1330]  ? rtnl_link_get_size (net/core/rtnetlink.c:747)
[   22.412380][ T1330]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:388 kernel/rcu/update.c:380)
[   22.412382][ T1330]  ? stack_depot_save_flags (lib/stackdepot.c:609 (discriminator 2) lib/stackdepot.c:676 (discriminator 2))
[   22.412385][ T1330]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   22.412387][ T1330]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   22.412389][ T1330]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   22.412392][ T1330]  ? kasan_save_stack (mm/kasan/common.c:58)
[   22.412394][ T1330]  ? kasan_save_stack (mm/kasan/common.c:57)
[   22.412395][ T1330]  ? kasan_save_track (mm/kasan/common.c:78)
[   22.412397][ T1330]  ? __kasan_kmalloc (mm/kasan/common.c:398 mm/kasan/common.c:415)
[   22.412399][ T1330]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   22.412401][ T1330]  ? snd_ac97_proc_read_main (sound/pci/ac97/ac97_proc.c:320)
[   22.412404][ T1330]  ? ___sys_sendmsg (net/socket.c:2758)
[   22.412408][ T1330]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   22.412410][ T1330]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   22.412412][ T1330]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   22.412418][ T1330]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   22.412420][ T1330]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   22.412421][ T1330]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   22.412423][ T1330]  ? trace_contention_end (./include/trace/events/lock.h:121 (discriminator 22))
[   22.412425][ T1330]  ? __mutex_lock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:3188 kernel/locking/mutex.c:89 kernel/locking/mutex.c:134 kernel/locking/mutex.c:649 kernel/locking/mutex.c:821)
[   22.412426][ T1330]  ? __mutex_lock (kernel/locking/mutex.c:656 (discriminator 1) kernel/locking/mutex.c:821 (discriminator 1))
[   22.412428][ T1330]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   22.412432][ T1330]  ? ww_mutex_lock (kernel/locking/mutex.c:934)
[   22.412435][ T1330]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   22.412437][ T1330]  ? __rtnl_newlink (net/core/rtnetlink.c:4063)
[   22.412443][ T1330]  rtnl_newlink (net/core/rtnetlink.c:4215)
[   22.412448][ T1330]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   22.412450][ T1330]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   22.412454][ T1330]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   22.412456][ T1330]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   22.412458][ T1330]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   22.412460][ T1330]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   22.412464][ T1330]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   22.412466][ T1330]  rtnetlink_rcv_msg (net/core/rtnetlink.c:7132)
[   22.412469][ T1330]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   22.412471][ T1330]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   22.412475][ T1330]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   22.412477][ T1330]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   22.412481][ T1330]  netlink_rcv_skb (net/netlink/af_netlink.c:2556)
[   22.412484][ T1330]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   22.412487][ T1330]  ? netlink_ack (./include/linux/skbuff.h:2718)
[   22.412493][ T1330]  ? netlink_deliver_tap (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) ./include/net/netns/generic.h:48 (discriminator 2) net/netlink/af_netlink.c:334 (discriminator 2))
[   22.412496][ T1330]  ? netlink_deliver_tap (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) net/netlink/af_netlink.c:341 (discriminator 2))
[   22.412500][ T1330]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1345)
[   22.412504][ T1330]  ? netlink_attachskb (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[   22.412507][ T1330]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   22.412511][ T1330]  netlink_sendmsg (net/netlink/af_netlink.c:1900)
[   22.412515][ T1330]  ? netlink_unicast (./include/net/net_namespace.h:422 (discriminator 7))
[   22.412519][ T1330]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   22.412521][ T1330]  ? __import_iovec (lib/iov_iter.c:1358 lib/iov_iter.c:1373)
[   22.412526][ T1330]  __sock_sendmsg (net/socket.c:800 (discriminator 4) net/socket.c:815 (discriminator 4))
[   22.412529][ T1330]  ____sys_sendmsg (net/socket.c:2713)
[   22.412531][ T1330]  ? copy_msghdr_from_user (net/socket.c:2650)
[   22.412533][ T1330]  ? sock_write_iter (net/socket.c:1269)
[   22.412535][ T1330]  ? move_addr_to_kernel (net/socket.c:258)
[   22.412542][ T1330]  ___sys_sendmsg (net/socket.c:2767)
[   22.412545][ T1330]  ? copy_msghdr_from_user (net/socket.c:2619)
[   22.412561][ T1330]  __sys_sendmsg (net/socket.c:2799)
[   22.412564][ T1330]  ? __sys_sendmsg_sock (net/socket.c:2780)
[   22.412570][ T1330]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   22.412573][ T1330]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   22.412576][ T1330]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   22.412579][ T1330]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   22.412581][ T1330] RIP: 0033:0x7f56e132e54e
[   22.412583][ T1330] Code: 4d 89 d8 e8 b4 bd 00 00 4c 8b 5d f8 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 11 c9 c3 0f 1f 80 00 00 00 00 48 8b 45 10 0f 05 <c9> c3 83 e2 39 83 fa 08 75 e7 e8 03 ff ff ff 0f 1f 00 f3 0f 1e fa
All code
========
   0:	4d 89 d8             	mov    %r11,%r8
   3:	e8 b4 bd 00 00       	call   0xbdbc
   8:	4c 8b 5d f8          	mov    -0x8(%rbp),%r11
   c:	41 8b 93 08 03 00 00 	mov    0x308(%r11),%edx
  13:	59                   	pop    %rcx
  14:	5e                   	pop    %rsi
  15:	48 83 f8 fc          	cmp    $0xfffffffffffffffc,%rax
  19:	74 11                	je     0x2c
  1b:	c9                   	leave
  1c:	c3                   	ret
  1d:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  24:	48 8b 45 10          	mov    0x10(%rbp),%rax
  28:	0f 05                	syscall
  2a:*	c9                   	leave		<-- trapping instruction
  2b:	c3                   	ret
  2c:	83 e2 39             	and    $0x39,%edx
  2f:	83 fa 08             	cmp    $0x8,%edx
  32:	75 e7                	jne    0x1b
  34:	e8 03 ff ff ff       	call   0xffffffffffffff3c
  39:	0f 1f 00             	nopl   (%rax)
  3c:	f3 0f 1e fa          	endbr64

Code starting with the faulting instruction
===========================================
   0:	c9                   	leave
   1:	c3                   	ret
   2:	83 e2 39             	and    $0x39,%edx
   5:	83 fa 08             	cmp    $0x8,%edx
   8:	75 e7                	jne    0xfffffffffffffff1
   a:	e8 03 ff ff ff       	call   0xffffffffffffff12
   f:	0f 1f 00             	nopl   (%rax)
  12:	f3 0f 1e fa          	endbr64
[   22.412585][ T1330] RSP: 002b:00007ffeeb8c3c10 EFLAGS: 00000202 ORIG_RAX: 000000000000002e
[   22.412588][ T1330] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f56e132e54e
[   22.412589][ T1330] RDX: 0000000000000000 RSI: 00007ffeeb8c3cc0 RDI: 0000000000000005
[   22.412590][ T1330] RBP: 00007ffeeb8c3c20 R08: 0000000000000000 R09: 0000000000000000
[   22.412591][ T1330] R10: 0000000000000000 R11: 0000000000000202 R12: 000000006a915cdc
[   22.412591][ T1330] R13: 00000000004a1620 R14: 0000000000000000 R15: 00007ffeeb8c4380
| [   24.480557][   T36] softirqs last disabled at (171304): br_port_carrier_check (./include/linux/spinlock.h:353 net/bridge/br_if.c:87)
| [   24.480560][   T36] Preemption disabled at:
| [   24.480560][   T36] 0x0
| [   24.480570][   T36] Tainted: [W]=WARN
[   24.480571][   T36] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   24.480573][   T36] Workqueue: events_unbound linkwatch_event
[   24.480576][   T36] Call Trace:
[   24.480577][   T36]  <TASK>
[   24.480579][   T36]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   24.480585][   T36]  __might_resched.cold (kernel/sched/core.c:9234)
[   24.480590][   T36]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   24.480594][   T36]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   24.480599][   T36]  __kmalloc_noprof (./include/linux/sched/mm.h:322 (discriminator 2) mm/slub.c:4636 (discriminator 2) mm/slub.c:4974 (discriminator 2) mm/slub.c:5413 (discriminator 2) mm/slub.c:5439 (discriminator 2))
[   24.480601][   T36]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   24.480608][   T36]  ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:58 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[   24.480610][   T36]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   24.480614][   T36]  put_chars (drivers/char/virtio_console.c:1176)
[   24.480617][   T36]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   24.480619][   T36]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   24.480622][   T36]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   24.480625][   T36]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   24.480629][   T36]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   24.480634][   T36]  ? mark_usage (kernel/locking/lockdep.c:4690)
[   24.480636][   T36]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   24.480637][   T36]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   24.480642][   T36]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   24.480644][   T36]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   24.480648][   T36]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   24.480652][   T36]  console_emit_next_record (kernel/printk/printk.c:3183)
[   24.480656][   T36]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   24.480658][   T36]  ? console_flush_one_record (./include/linux/rcupdate.h:314 (discriminator 2) ./include/linux/srcu.h:439 (discriminator 2) kernel/printk/printk.c:291 (discriminator 2) kernel/printk/printk.c:3246 (discriminator 2))
[   24.480662][   T36]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   24.480664][   T36]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   24.480668][   T36]  console_flush_one_record (kernel/printk/printk.c:3268)
[   24.480672][   T36]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   24.480674][   T36]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   24.480679][   T36]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   24.480682][   T36]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   24.480684][   T36]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   24.480686][   T36]  ? lock_acquire (./include/linux/srcutree.h:374 ./include/linux/srcu.h:541 ./include/linux/srcu.h:645 ./include/trace/events/lock.h:23 ./include/trace/events/lock.h:23 kernel/locking/lockdep.c:5871)
[   24.480690][   T36]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   24.480691][   T36]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   24.480694][   T36]  vprintk_emit (kernel/printk/printk.c:2479)
[   24.480698][   T36]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   24.480700][   T36]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   24.480702][   T36]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   24.480706][   T36]  _printk (kernel/printk/printk.c:2504)
[   24.480709][   T36]  ? snapshot_read.cold (user.c:?)
[   24.480715][   T36]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   24.480718][   T36]  br_set_state (net/bridge/br_stp.c:57 (discriminator 2))
[   24.480723][   T36]  br_init_port (net/bridge/br_stp_if.c:39)
[   24.480725][   T36]  br_stp_enable_port (net/bridge/br_stp_if.c:93)
[   24.480727][   T36]  br_port_carrier_check (net/bridge/br_if.c:90)
[   24.480731][   T36]  br_device_event (net/bridge/br.c:101)
[   24.480735][   T36]  ? packet_sendmsg_spkt (af_packet.c:?)
[   24.480736][   T36]  ? nlmsg_notify (./include/net/netlink.h:1165 ./include/net/netlink.h:1184 net/netlink/af_netlink.c:2599)
[   24.480744][   T36]  notifier_call_chain (kernel/notifier.c:85)
[   24.480750][   T36]  netif_state_change (net/core/dev.c:1625)
[   24.480754][   T36]  ? call_netdevice_notifiers_info (./include/net/net_namespace.h:422 (discriminator 7))
[   24.480759][   T36]  ? linkwatch_do_dev (net/core/link_watch.c:182 net/core/link_watch.c:166)
[   24.480761][   T36]  __linkwatch_run_queue (net/core/link_watch.c:240)
[   24.480765][   T36]  ? linkwatch_do_dev (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[   24.480767][   T36]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   24.480772][   T36]  linkwatch_event (net/core/link_watch.c:314 (discriminator 11))
[   24.480774][   T36]  ? __linkwatch_run_queue (net/core/link_watch.c:213)
[   24.480777][   T36]  process_one_work (kernel/workqueue.c:3387)
[   24.480784][   T36]  ? __queue_delayed_work (kernel/workqueue.c:2622)
[   24.480787][   T36]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   24.480795][   T36]  worker_thread (kernel/workqueue.c:3470 kernel/workqueue.c:3551)
[   24.480802][   T36]  ? rescuer_thread (./include/linux/list.h:419 (discriminator 3))
[   24.480804][   T36]  kthread (kernel/kthread.c:436)
[   24.480807][   T36]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   24.480810][   T36]  ? kthread_affine_preferred (kernel/kthread.c:857)
[   24.480813][   T36]  ret_from_fork (arch/x86/kernel/process.c:158)
[   24.480817][   T36]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/vdso/vma.c:80 (discriminator 1))
[   24.480821][   T36]  ? __switch_to (arch/x86/kernel/process_64.c:403 arch/x86/kernel/process_64.c:663)
[   24.480824][   T36]  ? kthread_affine_preferred (kernel/kthread.c:857)
[   24.480827][   T36]  ret_from_fork_asm (arch/x86/entry/entry_64.S:245)
| [   25.807872][ T1626] softirqs last disabled at (14380): br_device_event (./include/linux/spinlock.h:353 net/bridge/br.c:119)
| [   25.807875][ T1626] Preemption disabled at:
| [   25.807875][ T1626] 0x0
| [   25.807885][ T1626] Tainted: [W]=WARN
[   25.807886][ T1626] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   25.807888][ T1626] Call Trace:
[   25.807890][ T1626]  <TASK>
[   25.807891][ T1626]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   25.807898][ T1626]  __might_resched.cold (kernel/sched/core.c:9234)
[   25.807903][ T1626]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   25.807907][ T1626]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   25.807912][ T1626]  __kmalloc_noprof (./include/linux/sched/mm.h:322 (discriminator 2) mm/slub.c:4636 (discriminator 2) mm/slub.c:4974 (discriminator 2) mm/slub.c:5413 (discriminator 2) mm/slub.c:5439 (discriminator 2))
[   25.807914][ T1626]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   25.807920][ T1626]  ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:58 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[   25.807923][ T1626]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   25.807927][ T1626]  put_chars (drivers/char/virtio_console.c:1176)
[   25.807929][ T1626]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   25.807931][ T1626]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   25.807934][ T1626]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   25.807940][ T1626]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   25.807948][ T1626]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   25.807950][ T1626]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   25.807952][ T1626]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   25.807956][ T1626]  console_emit_next_record (kernel/printk/printk.c:3183)
[   25.807960][ T1626]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   25.807962][ T1626]  ? console_flush_one_record (./include/linux/rcupdate.h:314 (discriminator 2) ./include/linux/srcu.h:439 (discriminator 2) kernel/printk/printk.c:291 (discriminator 2) kernel/printk/printk.c:3246 (discriminator 2))
[   25.807966][ T1626]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   25.807967][ T1626]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   25.807971][ T1626]  console_flush_one_record (kernel/printk/printk.c:3268)
[   25.807975][ T1626]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   25.807977][ T1626]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   25.807983][ T1626]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   25.807985][ T1626]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   25.807987][ T1626]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   25.807989][ T1626]  ? lock_acquire (./include/linux/srcutree.h:374 ./include/linux/srcu.h:541 ./include/linux/srcu.h:645 ./include/trace/events/lock.h:23 ./include/trace/events/lock.h:23 kernel/locking/lockdep.c:5871)
[   25.807993][ T1626]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   25.807994][ T1626]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   25.807997][ T1626]  vprintk_emit (kernel/printk/printk.c:2479)
[   25.808000][ T1626]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   25.808002][ T1626]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   25.808004][ T1626]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   25.808009][ T1626]  _printk (kernel/printk/printk.c:2504)
[   25.808012][ T1626]  ? snapshot_read.cold (user.c:?)
[   25.808018][ T1626]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   25.808021][ T1626]  br_set_state (net/bridge/br_stp.c:57 (discriminator 2))
[   25.808026][ T1626]  br_init_port (net/bridge/br_stp_if.c:39)
[   25.808028][ T1626]  br_stp_enable_port (net/bridge/br_stp_if.c:93)
[   25.808030][ T1626]  br_device_event (net/bridge/br.c:120)
[   25.808033][ T1626]  ? packet_sendmsg_spkt (af_packet.c:?)
[   25.808035][ T1626]  ? nlmsg_notify (./include/net/netlink.h:1165 ./include/net/netlink.h:1184 net/netlink/af_netlink.c:2599)
[   25.808042][ T1626]  notifier_call_chain (kernel/notifier.c:85)
[   25.808047][ T1626]  __dev_notify_flags (net/core/dev.c:2313 net/core/dev.c:2327 net/core/dev.c:9853)
[   25.808053][ T1626]  ? netif_change_name (net/core/dev.c:1517)
[   25.808056][ T1626]  ? netif_set_allmulti (./include/net/netdev_lock.h:33)
[   25.808059][ T1626]  ? kernel_text_address (kernel/extable.c:125 kernel/extable.c:94)
[   25.808062][ T1626]  ? __kernel_text_address (kernel/extable.c:79)
[   25.808063][ T1626]  ? write_profile (profile.c:?)
[   25.808068][ T1626]  netif_change_flags (net/core/dev.c:9882)
[   25.808072][ T1626]  do_setlink.isra.0 (net/core/rtnetlink.c:3266 (discriminator 1))
[   25.808076][ T1626]  ? stack_trace_save (kernel/stacktrace.c:122 (discriminator 1))
[   25.808080][ T1626]  ? rtnl_link_get_size (net/core/rtnetlink.c:747)
[   25.808081][ T1626]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:388 kernel/rcu/update.c:380)
[   25.808083][ T1626]  ? stack_depot_save_flags (lib/stackdepot.c:609 (discriminator 2) lib/stackdepot.c:676 (discriminator 2))
[   25.808087][ T1626]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   25.808089][ T1626]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   25.808091][ T1626]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   25.808093][ T1626]  ? kasan_save_stack (mm/kasan/common.c:58)
[   25.808095][ T1626]  ? kasan_save_stack (mm/kasan/common.c:57)
[   25.808097][ T1626]  ? kasan_save_track (mm/kasan/common.c:78)
[   25.808098][ T1626]  ? __kasan_kmalloc (mm/kasan/common.c:398 mm/kasan/common.c:415)
[   25.808100][ T1626]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   25.808102][ T1626]  ? snd_ac97_proc_read_main (sound/pci/ac97/ac97_proc.c:320)
[   25.808105][ T1626]  ? ___sys_sendmsg (net/socket.c:2758)
[   25.808109][ T1626]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   25.808111][ T1626]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   25.808114][ T1626]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   25.808115][ T1626]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   25.808117][ T1626]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   25.808118][ T1626]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   25.808120][ T1626]  ? trace_contention_end (./include/trace/events/lock.h:121 (discriminator 22))
[   25.808122][ T1626]  ? __mutex_lock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:3188 kernel/locking/mutex.c:89 kernel/locking/mutex.c:134 kernel/locking/mutex.c:649 kernel/locking/mutex.c:821)
[   25.808125][ T1626]  ? __mutex_lock (kernel/locking/mutex.c:656 (discriminator 1) kernel/locking/mutex.c:821 (discriminator 1))
[   25.808127][ T1626]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   25.808130][ T1626]  ? ww_mutex_lock (kernel/locking/mutex.c:934)
[   25.808134][ T1626]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   25.808136][ T1626]  ? __rtnl_newlink (net/core/rtnetlink.c:4063)
[   25.808141][ T1626]  rtnl_newlink (net/core/rtnetlink.c:4215)
[   25.808146][ T1626]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   25.808148][ T1626]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   25.808153][ T1626]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   25.808154][ T1626]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   25.808157][ T1626]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   25.808159][ T1626]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   25.808162][ T1626]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   25.808165][ T1626]  rtnetlink_rcv_msg (net/core/rtnetlink.c:7132)
[   25.808168][ T1626]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   25.808169][ T1626]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   25.808173][ T1626]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   25.808175][ T1626]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   25.808179][ T1626]  netlink_rcv_skb (net/netlink/af_netlink.c:2556)
[   25.808181][ T1626]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   25.808184][ T1626]  ? netlink_ack (./include/linux/skbuff.h:2718)
[   25.808190][ T1626]  ? netlink_deliver_tap (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) ./include/net/netns/generic.h:48 (discriminator 2) net/netlink/af_netlink.c:334 (discriminator 2))
[   25.808192][ T1626]  ? netlink_deliver_tap (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) net/netlink/af_netlink.c:341 (discriminator 2))
[   25.808197][ T1626]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1345)
[   25.808201][ T1626]  ? netlink_attachskb (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[   25.808203][ T1626]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   25.808207][ T1626]  netlink_sendmsg (net/netlink/af_netlink.c:1900)
[   25.808211][ T1626]  ? netlink_unicast (./include/net/net_namespace.h:422 (discriminator 7))
[   25.808215][ T1626]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   25.808217][ T1626]  ? __import_iovec (lib/iov_iter.c:1358 lib/iov_iter.c:1373)
[   25.808222][ T1626]  __sock_sendmsg (net/socket.c:800 (discriminator 4) net/socket.c:815 (discriminator 4))
[   25.808225][ T1626]  ____sys_sendmsg (net/socket.c:2713)
[   25.808227][ T1626]  ? copy_msghdr_from_user (net/socket.c:2650)
[   25.808230][ T1626]  ? sock_write_iter (net/socket.c:1269)
[   25.808231][ T1626]  ? move_addr_to_kernel (net/socket.c:258)
[   25.808239][ T1626]  ___sys_sendmsg (net/socket.c:2767)
[   25.808242][ T1626]  ? copy_msghdr_from_user (net/socket.c:2619)
[   25.808258][ T1626]  __sys_sendmsg (net/socket.c:2799)
[   25.808260][ T1626]  ? __sys_sendmsg_sock (net/socket.c:2780)
[   25.808267][ T1626]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   25.808270][ T1626]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   25.808273][ T1626]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   25.808276][ T1626]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   25.808278][ T1626] RIP: 0033:0x7fe1db4e354e
[   25.808280][ T1626] Code: 4d 89 d8 e8 b4 bd 00 00 4c 8b 5d f8 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 11 c9 c3 0f 1f 80 00 00 00 00 48 8b 45 10 0f 05 <c9> c3 83 e2 39 83 fa 08 75 e7 e8 03 ff ff ff 0f 1f 00 f3 0f 1e fa
All code
========
   0:	4d 89 d8             	mov    %r11,%r8
   3:	e8 b4 bd 00 00       	call   0xbdbc
   8:	4c 8b 5d f8          	mov    -0x8(%rbp),%r11
   c:	41 8b 93 08 03 00 00 	mov    0x308(%r11),%edx
  13:	59                   	pop    %rcx
  14:	5e                   	pop    %rsi
  15:	48 83 f8 fc          	cmp    $0xfffffffffffffffc,%rax
  19:	74 11                	je     0x2c
  1b:	c9                   	leave
  1c:	c3                   	ret
  1d:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  24:	48 8b 45 10          	mov    0x10(%rbp),%rax
  28:	0f 05                	syscall
  2a:*	c9                   	leave		<-- trapping instruction
  2b:	c3                   	ret
  2c:	83 e2 39             	and    $0x39,%edx
  2f:	83 fa 08             	cmp    $0x8,%edx
  32:	75 e7                	jne    0x1b
  34:	e8 03 ff ff ff       	call   0xffffffffffffff3c
  39:	0f 1f 00             	nopl   (%rax)
  3c:	f3 0f 1e fa          	endbr64

Code starting with the faulting instruction
===========================================
   0:	c9                   	leave
   1:	c3                   	ret
   2:	83 e2 39             	and    $0x39,%edx
   5:	83 fa 08             	cmp    $0x8,%edx
   8:	75 e7                	jne    0xfffffffffffffff1
   a:	e8 03 ff ff ff       	call   0xffffffffffffff12
   f:	0f 1f 00             	nopl   (%rax)
  12:	f3 0f 1e fa          	endbr64
[   25.808283][ T1626] RSP: 002b:00007ffe5ffbf090 EFLAGS: 00000202 ORIG_RAX: 000000000000002e
[   25.808285][ T1626] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fe1db4e354e
[   25.808287][ T1626] RDX: 0000000000000000 RSI: 00007ffe5ffbf140 RDI: 0000000000000005
[   25.808287][ T1626] RBP: 00007ffe5ffbf0a0 R08: 0000000000000000 R09: 0000000000000000
[   25.808288][ T1626] R10: 0000000000000000 R11: 0000000000000202 R12: 000000006a915ce0
[   25.808289][ T1626] R13: 00000000004a1620 R14: 0000000000000000 R15: 00007ffe5ffbf800
| [   26.850224][ T1726] softirqs last disabled at (14906): br_device_event (./include/linux/spinlock.h:353 net/bridge/br.c:119)
| [   26.850227][ T1726] Preemption disabled at:
| [   26.850228][ T1726] 0x0
| [   26.850238][ T1726] Tainted: [W]=WARN
[   26.850239][ T1726] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   26.850241][ T1726] Call Trace:
[   26.850242][ T1726]  <TASK>
[   26.850244][ T1726]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   26.850251][ T1726]  __might_resched.cold (kernel/sched/core.c:9234)
[   26.850255][ T1726]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   26.850260][ T1726]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   26.850264][ T1726]  __kmalloc_noprof (./include/linux/sched/mm.h:322 (discriminator 2) mm/slub.c:4636 (discriminator 2) mm/slub.c:4974 (discriminator 2) mm/slub.c:5413 (discriminator 2) mm/slub.c:5439 (discriminator 2))
[   26.850266][ T1726]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   26.850273][ T1726]  ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:58 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[   26.850276][ T1726]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   26.850280][ T1726]  put_chars (drivers/char/virtio_console.c:1176)
[   26.850282][ T1726]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   26.850283][ T1726]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   26.850287][ T1726]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   26.850292][ T1726]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   26.850300][ T1726]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   26.850303][ T1726]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   26.850305][ T1726]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   26.850309][ T1726]  console_emit_next_record (kernel/printk/printk.c:3183)
[   26.850313][ T1726]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   26.850315][ T1726]  ? console_flush_one_record (./include/linux/rcupdate.h:314 (discriminator 2) ./include/linux/srcu.h:439 (discriminator 2) kernel/printk/printk.c:291 (discriminator 2) kernel/printk/printk.c:3246 (discriminator 2))
[   26.850318][ T1726]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   26.850320][ T1726]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   26.850324][ T1726]  console_flush_one_record (kernel/printk/printk.c:3268)
[   26.850328][ T1726]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   26.850330][ T1726]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   26.850336][ T1726]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   26.850338][ T1726]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   26.850340][ T1726]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   26.850342][ T1726]  ? lock_acquire (./include/linux/srcutree.h:374 ./include/linux/srcu.h:541 ./include/linux/srcu.h:645 ./include/trace/events/lock.h:23 ./include/trace/events/lock.h:23 kernel/locking/lockdep.c:5871)
[   26.850346][ T1726]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   26.850348][ T1726]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   26.850350][ T1726]  vprintk_emit (kernel/printk/printk.c:2479)
[   26.850354][ T1726]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   26.850356][ T1726]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   26.850358][ T1726]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   26.850362][ T1726]  _printk (kernel/printk/printk.c:2504)
[   26.850366][ T1726]  ? snapshot_read.cold (user.c:?)
[   26.850371][ T1726]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   26.850375][ T1726]  br_set_state (net/bridge/br_stp.c:57 (discriminator 2))
[   26.850380][ T1726]  br_init_port (net/bridge/br_stp_if.c:39)
[   26.850382][ T1726]  br_stp_enable_port (net/bridge/br_stp_if.c:93)
[   26.850384][ T1726]  br_device_event (net/bridge/br.c:120)
[   26.850387][ T1726]  ? packet_sendmsg_spkt (af_packet.c:?)
[   26.850389][ T1726]  ? nlmsg_notify (./include/net/netlink.h:1165 ./include/net/netlink.h:1184 net/netlink/af_netlink.c:2599)
[   26.850395][ T1726]  notifier_call_chain (kernel/notifier.c:85)
[   26.850401][ T1726]  __dev_notify_flags (net/core/dev.c:2313 net/core/dev.c:2327 net/core/dev.c:9853)
[   26.850407][ T1726]  ? netif_change_name (net/core/dev.c:1517)
[   26.850410][ T1726]  ? netif_set_allmulti (./include/net/netdev_lock.h:33)
[   26.850413][ T1726]  ? kernel_text_address (kernel/extable.c:125 kernel/extable.c:94)
[   26.850416][ T1726]  ? __kernel_text_address (kernel/extable.c:79)
[   26.850417][ T1726]  ? write_profile (profile.c:?)
[   26.850422][ T1726]  netif_change_flags (net/core/dev.c:9882)
[   26.850426][ T1726]  do_setlink.isra.0 (net/core/rtnetlink.c:3266 (discriminator 1))
[   26.850435][ T1726]  ? stack_trace_save (kernel/stacktrace.c:122 (discriminator 1))
[   26.850437][ T1726]  ? rtnl_link_get_size (net/core/rtnetlink.c:747)
[   26.850438][ T1726]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:388 kernel/rcu/update.c:380)
[   26.850440][ T1726]  ? stack_depot_save_flags (lib/stackdepot.c:609 (discriminator 2) lib/stackdepot.c:676 (discriminator 2))
[   26.850444][ T1726]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   26.850446][ T1726]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   26.850448][ T1726]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   26.850450][ T1726]  ? kasan_save_stack (mm/kasan/common.c:58)
[   26.850453][ T1726]  ? kasan_save_stack (mm/kasan/common.c:57)
[   26.850454][ T1726]  ? kasan_save_track (mm/kasan/common.c:78)
[   26.850455][ T1726]  ? __kasan_kmalloc (mm/kasan/common.c:398 mm/kasan/common.c:415)
[   26.850458][ T1726]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   26.850460][ T1726]  ? snd_ac97_proc_read_main (sound/pci/ac97/ac97_proc.c:320)
[   26.850463][ T1726]  ? ___sys_sendmsg (net/socket.c:2758)
[   26.850466][ T1726]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   26.850468][ T1726]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   26.850471][ T1726]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   26.850473][ T1726]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   26.850474][ T1726]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   26.850475][ T1726]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   26.850477][ T1726]  ? trace_contention_end (./include/trace/events/lock.h:121 (discriminator 22))
[   26.850479][ T1726]  ? __mutex_lock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:3188 kernel/locking/mutex.c:89 kernel/locking/mutex.c:134 kernel/locking/mutex.c:649 kernel/locking/mutex.c:821)
[   26.850482][ T1726]  ? __mutex_lock (kernel/locking/mutex.c:656 (discriminator 1) kernel/locking/mutex.c:821 (discriminator 1))
[   26.850484][ T1726]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   26.850488][ T1726]  ? ww_mutex_lock (kernel/locking/mutex.c:934)
[   26.850491][ T1726]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   26.850493][ T1726]  ? __rtnl_newlink (net/core/rtnetlink.c:4063)
[   26.850499][ T1726]  rtnl_newlink (net/core/rtnetlink.c:4215)
[   26.850504][ T1726]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   26.850506][ T1726]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   26.850511][ T1726]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   26.850512][ T1726]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   26.850515][ T1726]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   26.850517][ T1726]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   26.850520][ T1726]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   26.850522][ T1726]  rtnetlink_rcv_msg (net/core/rtnetlink.c:7132)
[   26.850526][ T1726]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   26.850527][ T1726]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   26.850531][ T1726]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   26.850533][ T1726]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   26.850537][ T1726]  netlink_rcv_skb (net/netlink/af_netlink.c:2556)
[   26.850539][ T1726]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   26.850542][ T1726]  ? netlink_ack (./include/linux/skbuff.h:2718)
[   26.850548][ T1726]  ? netlink_deliver_tap (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) ./include/net/netns/generic.h:48 (discriminator 2) net/netlink/af_netlink.c:334 (discriminator 2))
[   26.850550][ T1726]  ? netlink_deliver_tap (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) net/netlink/af_netlink.c:341 (discriminator 2))
[   26.850555][ T1726]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1345)
[   26.850559][ T1726]  ? netlink_attachskb (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[   26.850562][ T1726]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   26.850566][ T1726]  netlink_sendmsg (net/netlink/af_netlink.c:1900)
[   26.850570][ T1726]  ? netlink_unicast (./include/net/net_namespace.h:422 (discriminator 7))
[   26.850574][ T1726]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   26.850575][ T1726]  ? __import_iovec (lib/iov_iter.c:1358 lib/iov_iter.c:1373)
[   26.850581][ T1726]  __sock_sendmsg (net/socket.c:800 (discriminator 4) net/socket.c:815 (discriminator 4))
[   26.850584][ T1726]  ____sys_sendmsg (net/socket.c:2713)
[   26.850586][ T1726]  ? copy_msghdr_from_user (net/socket.c:2650)
[   26.850588][ T1726]  ? sock_write_iter (net/socket.c:1269)
[   26.850590][ T1726]  ? move_addr_to_kernel (net/socket.c:258)
[   26.850597][ T1726]  ___sys_sendmsg (net/socket.c:2767)
[   26.850600][ T1726]  ? copy_msghdr_from_user (net/socket.c:2619)
[   26.850616][ T1726]  __sys_sendmsg (net/socket.c:2799)
[   26.850619][ T1726]  ? __sys_sendmsg_sock (net/socket.c:2780)
[   26.850625][ T1726]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   26.850628][ T1726]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   26.850631][ T1726]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   26.850634][ T1726]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   26.850636][ T1726] RIP: 0033:0x7f623855654e
[   26.850638][ T1726] Code: 4d 89 d8 e8 b4 bd 00 00 4c 8b 5d f8 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 11 c9 c3 0f 1f 80 00 00 00 00 48 8b 45 10 0f 05 <c9> c3 83 e2 39 83 fa 08 75 e7 e8 03 ff ff ff 0f 1f 00 f3 0f 1e fa
All code
========
   0:	4d 89 d8             	mov    %r11,%r8
   3:	e8 b4 bd 00 00       	call   0xbdbc
   8:	4c 8b 5d f8          	mov    -0x8(%rbp),%r11
   c:	41 8b 93 08 03 00 00 	mov    0x308(%r11),%edx
  13:	59                   	pop    %rcx
  14:	5e                   	pop    %rsi
  15:	48 83 f8 fc          	cmp    $0xfffffffffffffffc,%rax
  19:	74 11                	je     0x2c
  1b:	c9                   	leave
  1c:	c3                   	ret
  1d:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  24:	48 8b 45 10          	mov    0x10(%rbp),%rax
  28:	0f 05                	syscall
  2a:*	c9                   	leave		<-- trapping instruction
  2b:	c3                   	ret
  2c:	83 e2 39             	and    $0x39,%edx
  2f:	83 fa 08             	cmp    $0x8,%edx
  32:	75 e7                	jne    0x1b
  34:	e8 03 ff ff ff       	call   0xffffffffffffff3c
  39:	0f 1f 00             	nopl   (%rax)
  3c:	f3 0f 1e fa          	endbr64

Code starting with the faulting instruction
===========================================
   0:	c9                   	leave
   1:	c3                   	ret
   2:	83 e2 39             	and    $0x39,%edx
   5:	83 fa 08             	cmp    $0x8,%edx
   8:	75 e7                	jne    0xfffffffffffffff1
   a:	e8 03 ff ff ff       	call   0xffffffffffffff12
   f:	0f 1f 00             	nopl   (%rax)
  12:	f3 0f 1e fa          	endbr64
[   26.850640][ T1726] RSP: 002b:00007ffdd0a01d20 EFLAGS: 00000202 ORIG_RAX: 000000000000002e
[   26.850643][ T1726] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f623855654e
[   26.850644][ T1726] RDX: 0000000000000000 RSI: 00007ffdd0a01dd0 RDI: 0000000000000005
[   26.850645][ T1726] RBP: 00007ffdd0a01d30 R08: 0000000000000000 R09: 0000000000000000
[   26.850646][ T1726] R10: 0000000000000000 R11: 0000000000000202 R12: 000000006a915ce1
[   26.850647][ T1726] R13: 00000000004a1620 R14: 0000000000000000 R15: 00007ffdd0a02490
| [   28.462702][ T1851] softirqs last disabled at (15116): br_device_event (./include/linux/spinlock.h:353 net/bridge/br.c:109)
| [   28.462704][ T1851] Preemption disabled at:
| [   28.462705][ T1851] 0x0
| [   28.462715][ T1851] Tainted: [W]=WARN
[   28.462716][ T1851] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   28.462718][ T1851] Call Trace:
[   28.462719][ T1851]  <TASK>
[   28.462721][ T1851]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   28.462727][ T1851]  __might_resched.cold (kernel/sched/core.c:9234)
[   28.462732][ T1851]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   28.462737][ T1851]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   28.462741][ T1851]  __kmalloc_noprof (./include/linux/sched/mm.h:322 (discriminator 2) mm/slub.c:4636 (discriminator 2) mm/slub.c:4974 (discriminator 2) mm/slub.c:5413 (discriminator 2) mm/slub.c:5439 (discriminator 2))
[   28.462743][ T1851]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   28.462750][ T1851]  ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:58 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[   28.462753][ T1851]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   28.462757][ T1851]  put_chars (drivers/char/virtio_console.c:1176)
[   28.462759][ T1851]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   28.462765][ T1851]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   28.462773][ T1851]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   28.462776][ T1851]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   28.462783][ T1851]  console_emit_next_record (kernel/printk/printk.c:3183)
[   28.462787][ T1851]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   28.462789][ T1851]  ? console_flush_one_record (./include/linux/rcupdate.h:314 (discriminator 2) ./include/linux/srcu.h:439 (discriminator 2) kernel/printk/printk.c:291 (discriminator 2) kernel/printk/printk.c:3246 (discriminator 2))
[   28.462792][ T1851]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   28.462795][ T1851]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   28.462799][ T1851]  console_flush_one_record (kernel/printk/printk.c:3268)
[   28.462803][ T1851]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   28.462805][ T1851]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   28.462810][ T1851]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   28.462813][ T1851]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   28.462815][ T1851]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   28.462817][ T1851]  ? lock_acquire (./include/linux/srcutree.h:374 ./include/linux/srcu.h:541 ./include/linux/srcu.h:645 ./include/trace/events/lock.h:23 ./include/trace/events/lock.h:23 kernel/locking/lockdep.c:5871)
[   28.462821][ T1851]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   28.462822][ T1851]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   28.462825][ T1851]  vprintk_emit (kernel/printk/printk.c:2479)
[   28.462828][ T1851]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   28.462830][ T1851]  ? mark_held_locks (kernel/locking/lockdep.c:4341)
[   28.462832][ T1851]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   28.462834][ T1851]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   28.462839][ T1851]  _printk (kernel/printk/printk.c:2504)
[   28.462843][ T1851]  ? snapshot_read.cold (user.c:?)
[   28.462850][ T1851]  br_set_state (net/bridge/br_stp.c:57 (discriminator 2))
[   28.462855][ T1851]  br_stp_disable_port (net/bridge/br_stp_if.c:106)
[   28.462858][ T1851]  br_device_event (net/bridge/br.c:111)
[   28.462860][ T1851]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:211 (discriminator 1) kernel/locking/spinlock.c:221 (discriminator 1))
[   28.462864][ T1851]  ? packet_sendmsg_spkt (af_packet.c:?)
[   28.462870][ T1851]  notifier_call_chain (kernel/notifier.c:85)
[   28.462876][ T1851]  __dev_notify_flags (net/core/dev.c:2313 net/core/dev.c:2327 net/core/dev.c:9855)
[   28.462881][ T1851]  ? netif_change_name (net/core/dev.c:1517)
[   28.462885][ T1851]  ? netif_set_allmulti (./include/net/netdev_lock.h:33)
[   28.462888][ T1851]  ? __kernel_text_address (kernel/extable.c:79)
[   28.462890][ T1851]  ? write_profile (profile.c:?)
[   28.462895][ T1851]  netif_change_flags (net/core/dev.c:9882)
[   28.462899][ T1851]  do_setlink.isra.0 (net/core/rtnetlink.c:3266 (discriminator 1))
[   28.462902][ T1851]  ? stack_trace_save (kernel/stacktrace.c:122 (discriminator 1))
[   28.462904][ T1851]  ? rtnl_link_get_size (net/core/rtnetlink.c:747)
[   28.462906][ T1851]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:388 kernel/rcu/update.c:380)
[   28.462908][ T1851]  ? stack_depot_save_flags (lib/stackdepot.c:609 (discriminator 2) lib/stackdepot.c:676 (discriminator 2))
[   28.462911][ T1851]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   28.462913][ T1851]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   28.462915][ T1851]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   28.462917][ T1851]  ? kasan_save_stack (mm/kasan/common.c:58)
[   28.462920][ T1851]  ? kasan_save_stack (mm/kasan/common.c:57)
[   28.462921][ T1851]  ? kasan_save_track (mm/kasan/common.c:78)
[   28.462922][ T1851]  ? __kasan_kmalloc (mm/kasan/common.c:398 mm/kasan/common.c:415)
[   28.462925][ T1851]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   28.462926][ T1851]  ? snd_ac97_proc_read_main (sound/pci/ac97/ac97_proc.c:320)
[   28.462929][ T1851]  ? ___sys_sendmsg (net/socket.c:2758)
[   28.462933][ T1851]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   28.462935][ T1851]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   28.462938][ T1851]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   28.462940][ T1851]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   28.462941][ T1851]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   28.462942][ T1851]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   28.462944][ T1851]  ? trace_contention_end (./include/trace/events/lock.h:121 (discriminator 22))
[   28.462946][ T1851]  ? __mutex_lock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:3188 kernel/locking/mutex.c:89 kernel/locking/mutex.c:134 kernel/locking/mutex.c:649 kernel/locking/mutex.c:821)
[   28.462948][ T1851]  ? __mutex_lock (kernel/locking/mutex.c:656 (discriminator 1) kernel/locking/mutex.c:821 (discriminator 1))
[   28.462950][ T1851]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   28.462953][ T1851]  ? ww_mutex_lock (kernel/locking/mutex.c:934)
[   28.462956][ T1851]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   28.462959][ T1851]  ? __rtnl_newlink (net/core/rtnetlink.c:4063)
[   28.462964][ T1851]  rtnl_newlink (net/core/rtnetlink.c:4215)
[   28.462969][ T1851]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   28.462971][ T1851]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   28.462976][ T1851]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   28.462978][ T1851]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   28.462980][ T1851]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   28.462982][ T1851]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   28.462986][ T1851]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   28.462988][ T1851]  rtnetlink_rcv_msg (net/core/rtnetlink.c:7132)
[   28.462991][ T1851]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   28.462992][ T1851]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   28.462996][ T1851]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   28.462998][ T1851]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   28.463002][ T1851]  netlink_rcv_skb (net/netlink/af_netlink.c:2556)
[   28.463006][ T1851]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   28.463008][ T1851]  ? netlink_ack (./include/linux/skbuff.h:2718)
[   28.463015][ T1851]  ? netlink_deliver_tap (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) ./include/net/netns/generic.h:48 (discriminator 2) net/netlink/af_netlink.c:334 (discriminator 2))
[   28.463017][ T1851]  ? netlink_deliver_tap (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) net/netlink/af_netlink.c:341 (discriminator 2))
[   28.463022][ T1851]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1345)
[   28.463026][ T1851]  ? netlink_attachskb (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[   28.463028][ T1851]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   28.463032][ T1851]  netlink_sendmsg (net/netlink/af_netlink.c:1900)
[   28.463036][ T1851]  ? netlink_unicast (./include/net/net_namespace.h:422 (discriminator 7))
[   28.463040][ T1851]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   28.463042][ T1851]  ? __import_iovec (lib/iov_iter.c:1358 lib/iov_iter.c:1373)
[   28.463047][ T1851]  __sock_sendmsg (net/socket.c:800 (discriminator 4) net/socket.c:815 (discriminator 4))
[   28.463050][ T1851]  ____sys_sendmsg (net/socket.c:2713)
[   28.463052][ T1851]  ? copy_msghdr_from_user (net/socket.c:2650)
[   28.463055][ T1851]  ? sock_write_iter (net/socket.c:1269)
[   28.463056][ T1851]  ? move_addr_to_kernel (net/socket.c:258)
[   28.463064][ T1851]  ___sys_sendmsg (net/socket.c:2767)
[   28.463066][ T1851]  ? copy_msghdr_from_user (net/socket.c:2619)
[   28.463083][ T1851]  __sys_sendmsg (net/socket.c:2799)
[   28.463085][ T1851]  ? __sys_sendmsg_sock (net/socket.c:2780)
[   28.463092][ T1851]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   28.463095][ T1851]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   28.463098][ T1851]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   28.463101][ T1851]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   28.463103][ T1851] RIP: 0033:0x7fd27192b54e
[   28.463105][ T1851] Code: 4d 89 d8 e8 b4 bd 00 00 4c 8b 5d f8 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 11 c9 c3 0f 1f 80 00 00 00 00 48 8b 45 10 0f 05 <c9> c3 83 e2 39 83 fa 08 75 e7 e8 03 ff ff ff 0f 1f 00 f3 0f 1e fa
All code
========
   0:	4d 89 d8             	mov    %r11,%r8
   3:	e8 b4 bd 00 00       	call   0xbdbc
   8:	4c 8b 5d f8          	mov    -0x8(%rbp),%r11
   c:	41 8b 93 08 03 00 00 	mov    0x308(%r11),%edx
  13:	59                   	pop    %rcx
  14:	5e                   	pop    %rsi
  15:	48 83 f8 fc          	cmp    $0xfffffffffffffffc,%rax
  19:	74 11                	je     0x2c
  1b:	c9                   	leave
  1c:	c3                   	ret
  1d:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  24:	48 8b 45 10          	mov    0x10(%rbp),%rax
  28:	0f 05                	syscall
  2a:*	c9                   	leave		<-- trapping instruction
  2b:	c3                   	ret
  2c:	83 e2 39             	and    $0x39,%edx
  2f:	83 fa 08             	cmp    $0x8,%edx
  32:	75 e7                	jne    0x1b
  34:	e8 03 ff ff ff       	call   0xffffffffffffff3c
  39:	0f 1f 00             	nopl   (%rax)
  3c:	f3 0f 1e fa          	endbr64

Code starting with the faulting instruction
===========================================
   0:	c9                   	leave
   1:	c3                   	ret
   2:	83 e2 39             	and    $0x39,%edx
   5:	83 fa 08             	cmp    $0x8,%edx
   8:	75 e7                	jne    0xfffffffffffffff1
   a:	e8 03 ff ff ff       	call   0xffffffffffffff12
   f:	0f 1f 00             	nopl   (%rax)
  12:	f3 0f 1e fa          	endbr64
[   28.463107][ T1851] RSP: 002b:00007fffb5af1120 EFLAGS: 00000202 ORIG_RAX: 000000000000002e
[   28.463109][ T1851] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fd27192b54e
[   28.463111][ T1851] RDX: 0000000000000000 RSI: 00007fffb5af11d0 RDI: 0000000000000005
[   28.463112][ T1851] RBP: 00007fffb5af1130 R08: 0000000000000000 R09: 0000000000000000
[   28.463113][ T1851] R10: 0000000000000000 R11: 0000000000000202 R12: 000000006a915ce2
[   28.463113][ T1851] R13: 00000000004a1620 R14: 0000000000000000 R15: 00007fffb5af1890
| [   29.485871][ T1943] softirqs last disabled at (19046): br_device_event (./include/linux/spinlock.h:353 net/bridge/br.c:109)
| [   29.485875][ T1943] Preemption disabled at:
| [   29.485876][ T1943] 0x0
| [   29.485889][ T1943] Tainted: [W]=WARN
[   29.485890][ T1943] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   29.485893][ T1943] Call Trace:
[   29.485894][ T1943]  <TASK>
[   29.485896][ T1943]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   29.485905][ T1943]  __might_resched.cold (kernel/sched/core.c:9234)
[   29.485911][ T1943]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   29.485916][ T1943]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   29.485923][ T1943]  __kmalloc_noprof (./include/linux/sched/mm.h:322 (discriminator 2) mm/slub.c:4636 (discriminator 2) mm/slub.c:4974 (discriminator 2) mm/slub.c:5413 (discriminator 2) mm/slub.c:5439 (discriminator 2))
[   29.485926][ T1943]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   29.485935][ T1943]  ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:58 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[   29.485939][ T1943]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   29.485945][ T1943]  put_chars (drivers/char/virtio_console.c:1176)
[   29.485949][ T1943]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   29.485960][ T1943]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   29.485971][ T1943]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   29.485976][ T1943]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   29.485983][ T1943]  console_emit_next_record (kernel/printk/printk.c:3183)
[   29.485989][ T1943]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   29.485992][ T1943]  ? console_flush_one_record (./include/linux/rcupdate.h:314 (discriminator 2) ./include/linux/srcu.h:439 (discriminator 2) kernel/printk/printk.c:291 (discriminator 2) kernel/printk/printk.c:3246 (discriminator 2))
[   29.485997][ T1943]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   29.486001][ T1943]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   29.486008][ T1943]  console_flush_one_record (kernel/printk/printk.c:3268)
[   29.486015][ T1943]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   29.486017][ T1943]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   29.486026][ T1943]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   29.486031][ T1943]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   29.486033][ T1943]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   29.486036][ T1943]  ? lock_acquire (./include/linux/srcutree.h:374 ./include/linux/srcu.h:541 ./include/linux/srcu.h:645 ./include/trace/events/lock.h:23 ./include/trace/events/lock.h:23 kernel/locking/lockdep.c:5871)
[   29.486042][ T1943]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   29.486045][ T1943]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   29.486050][ T1943]  vprintk_emit (kernel/printk/printk.c:2479)
[   29.486055][ T1943]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   29.486057][ T1943]  ? mark_held_locks (kernel/locking/lockdep.c:4341)
[   29.486061][ T1943]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   29.486064][ T1943]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   29.486071][ T1943]  _printk (kernel/printk/printk.c:2504)
[   29.486076][ T1943]  ? snapshot_read.cold (user.c:?)
[   29.486092][ T1943]  br_set_state (net/bridge/br_stp.c:57 (discriminator 2))
[   29.486099][ T1943]  br_stp_disable_port (net/bridge/br_stp_if.c:106)
[   29.486105][ T1943]  br_device_event (net/bridge/br.c:111)
[   29.486108][ T1943]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:211 (discriminator 1) kernel/locking/spinlock.c:221 (discriminator 1))
[   29.486113][ T1943]  ? packet_sendmsg_spkt (af_packet.c:?)
[   29.486122][ T1943]  notifier_call_chain (kernel/notifier.c:85)
[   29.486132][ T1943]  __dev_notify_flags (net/core/dev.c:2313 net/core/dev.c:2327 net/core/dev.c:9855)
[   29.486139][ T1943]  ? netif_change_name (net/core/dev.c:1517)
[   29.486145][ T1943]  ? netif_set_allmulti (./include/net/netdev_lock.h:33)
[   29.486150][ T1943]  ? __kernel_text_address (kernel/extable.c:79)
[   29.486153][ T1943]  ? write_profile (profile.c:?)
[   29.486161][ T1943]  netif_change_flags (net/core/dev.c:9882)
[   29.486167][ T1943]  do_setlink.isra.0 (net/core/rtnetlink.c:3266 (discriminator 1))
[   29.486173][ T1943]  ? stack_trace_save (kernel/stacktrace.c:122 (discriminator 1))
[   29.486176][ T1943]  ? rtnl_link_get_size (net/core/rtnetlink.c:747)
[   29.486178][ T1943]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:388 kernel/rcu/update.c:380)
[   29.486181][ T1943]  ? stack_depot_save_flags (lib/stackdepot.c:609 (discriminator 2) lib/stackdepot.c:676 (discriminator 2))
[   29.486186][ T1943]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   29.486189][ T1943]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   29.486192][ T1943]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   29.486196][ T1943]  ? kasan_save_stack (mm/kasan/common.c:58)
[   29.486199][ T1943]  ? kasan_save_stack (mm/kasan/common.c:57)
[   29.486201][ T1943]  ? kasan_save_track (mm/kasan/common.c:78)
[   29.486203][ T1943]  ? __kasan_kmalloc (mm/kasan/common.c:398 mm/kasan/common.c:415)
[   29.486207][ T1943]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   29.486210][ T1943]  ? snd_ac97_proc_read_main (sound/pci/ac97/ac97_proc.c:320)
[   29.486214][ T1943]  ? ___sys_sendmsg (net/socket.c:2758)
[   29.486220][ T1943]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   29.486223][ T1943]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   29.486228][ T1943]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   29.486231][ T1943]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   29.486233][ T1943]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   29.486235][ T1943]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   29.486238][ T1943]  ? trace_contention_end (./include/trace/events/lock.h:121 (discriminator 22))
[   29.486241][ T1943]  ? __mutex_lock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:3188 kernel/locking/mutex.c:89 kernel/locking/mutex.c:134 kernel/locking/mutex.c:649 kernel/locking/mutex.c:821)
[   29.486243][ T1943]  ? __mutex_lock (kernel/locking/mutex.c:656 (discriminator 1) kernel/locking/mutex.c:821 (discriminator 1))
[   29.486247][ T1943]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   29.486252][ T1943]  ? ww_mutex_lock (kernel/locking/mutex.c:934)
[   29.486259][ T1943]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   29.486262][ T1943]  ? __rtnl_newlink (net/core/rtnetlink.c:4063)
[   29.486271][ T1943]  rtnl_newlink (net/core/rtnetlink.c:4215)
[   29.486281][ T1943]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   29.486284][ T1943]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   29.486291][ T1943]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   29.486294][ T1943]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   29.486297][ T1943]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   29.486300][ T1943]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   29.486307][ T1943]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   29.486310][ T1943]  rtnetlink_rcv_msg (net/core/rtnetlink.c:7132)
[   29.486316][ T1943]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   29.486318][ T1943]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   29.486325][ T1943]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   29.486328][ T1943]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   29.486334][ T1943]  netlink_rcv_skb (net/netlink/af_netlink.c:2556)
[   29.486339][ T1943]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   29.486343][ T1943]  ? netlink_ack (./include/linux/skbuff.h:2718)
[   29.486354][ T1943]  ? netlink_deliver_tap (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) ./include/net/netns/generic.h:48 (discriminator 2) net/netlink/af_netlink.c:334 (discriminator 2))
[   29.486357][ T1943]  ? netlink_deliver_tap (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) net/netlink/af_netlink.c:341 (discriminator 2))
[   29.486365][ T1943]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1345)
[   29.486372][ T1943]  ? netlink_attachskb (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[   29.486376][ T1943]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   29.486383][ T1943]  netlink_sendmsg (net/netlink/af_netlink.c:1900)
[   29.486390][ T1943]  ? netlink_unicast (./include/net/net_namespace.h:422 (discriminator 7))
[   29.486396][ T1943]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   29.486398][ T1943]  ? __import_iovec (lib/iov_iter.c:1358 lib/iov_iter.c:1373)
[   29.486406][ T1943]  __sock_sendmsg (net/socket.c:800 (discriminator 4) net/socket.c:815 (discriminator 4))
[   29.486411][ T1943]  ____sys_sendmsg (net/socket.c:2713)
[   29.486414][ T1943]  ? copy_msghdr_from_user (net/socket.c:2650)
[   29.486418][ T1943]  ? sock_write_iter (net/socket.c:1269)
[   29.486420][ T1943]  ? move_addr_to_kernel (net/socket.c:258)
[   29.486433][ T1943]  ___sys_sendmsg (net/socket.c:2767)
[   29.486444][ T1943]  ? copy_msghdr_from_user (net/socket.c:2619)
[   29.486472][ T1943]  __sys_sendmsg (net/socket.c:2799)
[   29.486477][ T1943]  ? __sys_sendmsg_sock (net/socket.c:2780)
[   29.486487][ T1943]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   29.486492][ T1943]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   29.486496][ T1943]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   29.486501][ T1943]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   29.486504][ T1943] RIP: 0033:0x7f07c88d854e
[   29.486507][ T1943] Code: 4d 89 d8 e8 b4 bd 00 00 4c 8b 5d f8 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 11 c9 c3 0f 1f 80 00 00 00 00 48 8b 45 10 0f 05 <c9> c3 83 e2 39 83 fa 08 75 e7 e8 03 ff ff ff 0f 1f 00 f3 0f 1e fa
All code
========
   0:	4d 89 d8             	mov    %r11,%r8
   3:	e8 b4 bd 00 00       	call   0xbdbc
   8:	4c 8b 5d f8          	mov    -0x8(%rbp),%r11
   c:	41 8b 93 08 03 00 00 	mov    0x308(%r11),%edx
  13:	59                   	pop    %rcx
  14:	5e                   	pop    %rsi
  15:	48 83 f8 fc          	cmp    $0xfffffffffffffffc,%rax
  19:	74 11                	je     0x2c
  1b:	c9                   	leave
  1c:	c3                   	ret
  1d:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  24:	48 8b 45 10          	mov    0x10(%rbp),%rax
  28:	0f 05                	syscall
  2a:*	c9                   	leave		<-- trapping instruction
  2b:	c3                   	ret
  2c:	83 e2 39             	and    $0x39,%edx
  2f:	83 fa 08             	cmp    $0x8,%edx
  32:	75 e7                	jne    0x1b
  34:	e8 03 ff ff ff       	call   0xffffffffffffff3c
  39:	0f 1f 00             	nopl   (%rax)
  3c:	f3 0f 1e fa          	endbr64

Code starting with the faulting instruction
===========================================
   0:	c9                   	leave
   1:	c3                   	ret
   2:	83 e2 39             	and    $0x39,%edx
   5:	83 fa 08             	cmp    $0x8,%edx
   8:	75 e7                	jne    0xfffffffffffffff1
   a:	e8 03 ff ff ff       	call   0xffffffffffffff12
   f:	0f 1f 00             	nopl   (%rax)
  12:	f3 0f 1e fa          	endbr64
[   29.486510][ T1943] RSP: 002b:00007ffcd3b655e0 EFLAGS: 00000202 ORIG_RAX: 000000000000002e
[   29.486513][ T1943] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f07c88d854e
[   29.486515][ T1943] RDX: 0000000000000000 RSI: 00007ffcd3b65690 RDI: 0000000000000005
[   29.486517][ T1943] RBP: 00007ffcd3b655f0 R08: 0000000000000000 R09: 0000000000000000
[   29.486518][ T1943] R10: 0000000000000000 R11: 0000000000000202 R12: 000000006a915ce3
[   29.486520][ T1943] R13: 00000000004a1620 R14: 0000000000000000 R15: 00007ffcd3b65d50
| [   31.541575][   T39] softirqs last disabled at (146790): br_port_carrier_check (./include/linux/spinlock.h:353 net/bridge/br_if.c:87)
| [   31.541578][   T39] Preemption disabled at:
| [   31.541578][   T39] 0x0
| [   31.541589][   T39] Tainted: [W]=WARN
[   31.541590][   T39] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   31.541592][   T39] Workqueue: events_unbound linkwatch_event
[   31.541595][   T39] Call Trace:
[   31.541597][   T39]  <TASK>
[   31.541599][   T39]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   31.541605][   T39]  __might_resched.cold (kernel/sched/core.c:9234)
[   31.541609][   T39]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   31.541613][   T39]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   31.541618][   T39]  __kmalloc_noprof (./include/linux/sched/mm.h:322 (discriminator 2) mm/slub.c:4636 (discriminator 2) mm/slub.c:4974 (discriminator 2) mm/slub.c:5413 (discriminator 2) mm/slub.c:5439 (discriminator 2))
[   31.541620][   T39]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   31.541626][   T39]  ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:58 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[   31.541629][   T39]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   31.541633][   T39]  put_chars (drivers/char/virtio_console.c:1176)
[   31.541636][   T39]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   31.541638][   T39]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   31.541641][   T39]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   31.541644][   T39]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   31.541648][   T39]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   31.541653][   T39]  ? mark_usage (kernel/locking/lockdep.c:4690)
[   31.541654][   T39]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   31.541656][   T39]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   31.541661][   T39]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   31.541662][   T39]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   31.541667][   T39]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   31.541671][   T39]  console_emit_next_record (kernel/printk/printk.c:3183)
[   31.541675][   T39]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   31.541677][   T39]  ? console_flush_one_record (./include/linux/rcupdate.h:314 (discriminator 2) ./include/linux/srcu.h:439 (discriminator 2) kernel/printk/printk.c:291 (discriminator 2) kernel/printk/printk.c:3246 (discriminator 2))
[   31.541680][   T39]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   31.541682][   T39]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   31.541686][   T39]  console_flush_one_record (kernel/printk/printk.c:3268)
[   31.541691][   T39]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   31.541693][   T39]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   31.541698][   T39]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   31.541701][   T39]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   31.541703][   T39]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   31.541705][   T39]  ? lock_acquire (./include/linux/srcutree.h:374 ./include/linux/srcu.h:541 ./include/linux/srcu.h:645 ./include/trace/events/lock.h:23 ./include/trace/events/lock.h:23 kernel/locking/lockdep.c:5871)
[   31.541708][   T39]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   31.541710][   T39]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   31.541713][   T39]  vprintk_emit (kernel/printk/printk.c:2479)
[   31.541716][   T39]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   31.541718][   T39]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   31.541720][   T39]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   31.541724][   T39]  _printk (kernel/printk/printk.c:2504)
[   31.541728][   T39]  ? snapshot_read.cold (user.c:?)
[   31.541733][   T39]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   31.541737][   T39]  br_set_state (net/bridge/br_stp.c:57 (discriminator 2))
[   31.541741][   T39]  br_init_port (net/bridge/br_stp_if.c:39)
[   31.541743][   T39]  br_stp_enable_port (net/bridge/br_stp_if.c:93)
[   31.541745][   T39]  br_port_carrier_check (net/bridge/br_if.c:90)
[   31.541749][   T39]  br_device_event (net/bridge/br.c:101)
[   31.541753][   T39]  ? packet_sendmsg_spkt (af_packet.c:?)
[   31.541754][   T39]  ? nlmsg_notify (./include/net/netlink.h:1165 ./include/net/netlink.h:1184 net/netlink/af_netlink.c:2599)
[   31.541761][   T39]  notifier_call_chain (kernel/notifier.c:85)
[   31.541767][   T39]  netif_state_change (net/core/dev.c:1625)
[   31.541772][   T39]  ? call_netdevice_notifiers_info (./include/net/net_namespace.h:422 (discriminator 7))
[   31.541776][   T39]  ? linkwatch_do_dev (net/core/link_watch.c:182 net/core/link_watch.c:166)
[   31.541779][   T39]  __linkwatch_run_queue (net/core/link_watch.c:240)
[   31.541782][   T39]  ? linkwatch_do_dev (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[   31.541784][   T39]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   31.541789][   T39]  linkwatch_event (net/core/link_watch.c:314 (discriminator 11))
[   31.541791][   T39]  ? __linkwatch_run_queue (net/core/link_watch.c:213)
[   31.541794][   T39]  process_one_work (kernel/workqueue.c:3387)
[   31.541801][   T39]  ? __queue_delayed_work (kernel/workqueue.c:2622)
[   31.541804][   T39]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   31.541811][   T39]  worker_thread (kernel/workqueue.c:3470 kernel/workqueue.c:3551)
[   31.541819][   T39]  ? rescuer_thread (./include/linux/list.h:419 (discriminator 3))
[   31.541821][   T39]  kthread (kernel/kthread.c:436)
[   31.541823][   T39]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   31.541826][   T39]  ? kthread_affine_preferred (kernel/kthread.c:857)
[   31.541829][   T39]  ret_from_fork (arch/x86/kernel/process.c:158)
[   31.541834][   T39]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/vdso/vma.c:80 (discriminator 1))
[   31.541837][   T39]  ? __switch_to (arch/x86/kernel/process_64.c:403 arch/x86/kernel/process_64.c:663)
[   31.541841][   T39]  ? kthread_affine_preferred (kernel/kthread.c:857)
[   31.541843][   T39]  ret_from_fork_asm (arch/x86/entry/entry_64.S:245)
| [   32.925228][ T2254] softirqs last disabled at (16772): br_device_event (./include/linux/spinlock.h:353 net/bridge/br.c:119)
| [   32.925231][ T2254] Preemption disabled at:
| [   32.925231][ T2254] 0x0
| [   32.925242][ T2254] Tainted: [W]=WARN
[   32.925243][ T2254] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   32.925244][ T2254] Call Trace:
[   32.925246][ T2254]  <TASK>
[   32.925248][ T2254]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   32.925254][ T2254]  __might_resched.cold (kernel/sched/core.c:9234)
[   32.925259][ T2254]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   32.925263][ T2254]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   32.925268][ T2254]  __kmalloc_noprof (./include/linux/sched/mm.h:322 (discriminator 2) mm/slub.c:4636 (discriminator 2) mm/slub.c:4974 (discriminator 2) mm/slub.c:5413 (discriminator 2) mm/slub.c:5439 (discriminator 2))
[   32.925269][ T2254]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   32.925276][ T2254]  ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:58 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[   32.925279][ T2254]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   32.925283][ T2254]  put_chars (drivers/char/virtio_console.c:1176)
[   32.925285][ T2254]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   32.925286][ T2254]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   32.925290][ T2254]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   32.925296][ T2254]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   32.925304][ T2254]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   32.925306][ T2254]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   32.925308][ T2254]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   32.925312][ T2254]  console_emit_next_record (kernel/printk/printk.c:3183)
[   32.925317][ T2254]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   32.925318][ T2254]  ? console_flush_one_record (./include/linux/rcupdate.h:314 (discriminator 2) ./include/linux/srcu.h:439 (discriminator 2) kernel/printk/printk.c:291 (discriminator 2) kernel/printk/printk.c:3246 (discriminator 2))
[   32.925322][ T2254]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   32.925323][ T2254]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   32.925328][ T2254]  console_flush_one_record (kernel/printk/printk.c:3268)
[   32.925332][ T2254]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   32.925334][ T2254]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   32.925339][ T2254]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   32.925342][ T2254]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   32.925344][ T2254]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   32.925346][ T2254]  ? lock_acquire (./include/linux/srcutree.h:374 ./include/linux/srcu.h:541 ./include/linux/srcu.h:645 ./include/trace/events/lock.h:23 ./include/trace/events/lock.h:23 kernel/locking/lockdep.c:5871)
[   32.925349][ T2254]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   32.925351][ T2254]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   32.925354][ T2254]  vprintk_emit (kernel/printk/printk.c:2479)
[   32.925357][ T2254]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   32.925363][ T2254]  _printk (kernel/printk/printk.c:2504)
[   32.925367][ T2254]  ? snapshot_read.cold (user.c:?)
[   32.925372][ T2254]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   32.925376][ T2254]  br_set_state (net/bridge/br_stp.c:57 (discriminator 2))
[   32.925381][ T2254]  br_init_port (net/bridge/br_stp_if.c:39)
[   32.925383][ T2254]  br_stp_enable_port (net/bridge/br_stp_if.c:93)
[   32.925385][ T2254]  br_device_event (net/bridge/br.c:120)
[   32.925388][ T2254]  ? packet_sendmsg_spkt (af_packet.c:?)
[   32.925390][ T2254]  ? nlmsg_notify (./include/net/netlink.h:1165 ./include/net/netlink.h:1184 net/netlink/af_netlink.c:2599)
[   32.925397][ T2254]  notifier_call_chain (kernel/notifier.c:85)
[   32.925403][ T2254]  __dev_notify_flags (net/core/dev.c:2313 net/core/dev.c:2327 net/core/dev.c:9853)
[   32.925408][ T2254]  ? netif_change_name (net/core/dev.c:1517)
[   32.925412][ T2254]  ? netif_set_allmulti (./include/net/netdev_lock.h:33)
[   32.925414][ T2254]  ? kernel_text_address (kernel/extable.c:125 kernel/extable.c:94)
[   32.925417][ T2254]  ? __kernel_text_address (kernel/extable.c:79)
[   32.925419][ T2254]  ? write_profile (profile.c:?)
[   32.925424][ T2254]  netif_change_flags (net/core/dev.c:9882)
[   32.925428][ T2254]  do_setlink.isra.0 (net/core/rtnetlink.c:3266 (discriminator 1))
[   32.925431][ T2254]  ? stack_trace_save (kernel/stacktrace.c:122 (discriminator 1))
[   32.925433][ T2254]  ? rtnl_link_get_size (net/core/rtnetlink.c:747)
[   32.925435][ T2254]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:388 kernel/rcu/update.c:380)
[   32.925438][ T2254]  ? stack_depot_save_flags (lib/stackdepot.c:609 (discriminator 2) lib/stackdepot.c:676 (discriminator 2))
[   32.925441][ T2254]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   32.925443][ T2254]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   32.925445][ T2254]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   32.925447][ T2254]  ? kasan_save_stack (mm/kasan/common.c:58)
[   32.925455][ T2254]  ? kasan_save_stack (mm/kasan/common.c:57)
[   32.925456][ T2254]  ? kasan_save_track (mm/kasan/common.c:78)
[   32.925457][ T2254]  ? __kasan_kmalloc (mm/kasan/common.c:398 mm/kasan/common.c:415)
[   32.925459][ T2254]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   32.925461][ T2254]  ? snd_ac97_proc_read_main (sound/pci/ac97/ac97_proc.c:320)
[   32.925465][ T2254]  ? ___sys_sendmsg (net/socket.c:2758)
[   32.925469][ T2254]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   32.925471][ T2254]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   32.925473][ T2254]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   32.925475][ T2254]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   32.925476][ T2254]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   32.925478][ T2254]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   32.925479][ T2254]  ? trace_contention_end (./include/trace/events/lock.h:121 (discriminator 22))
[   32.925482][ T2254]  ? __mutex_lock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:3188 kernel/locking/mutex.c:89 kernel/locking/mutex.c:134 kernel/locking/mutex.c:649 kernel/locking/mutex.c:821)
[   32.925485][ T2254]  ? __mutex_lock (kernel/locking/mutex.c:656 (discriminator 1) kernel/locking/mutex.c:821 (discriminator 1))
[   32.925486][ T2254]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   32.925490][ T2254]  ? ww_mutex_lock (kernel/locking/mutex.c:934)
[   32.925493][ T2254]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   32.925496][ T2254]  ? __rtnl_newlink (net/core/rtnetlink.c:4063)
[   32.925501][ T2254]  rtnl_newlink (net/core/rtnetlink.c:4215)
[   32.925506][ T2254]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   32.925508][ T2254]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   32.925513][ T2254]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   32.925515][ T2254]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   32.925517][ T2254]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   32.925519][ T2254]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   32.925522][ T2254]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   32.925524][ T2254]  rtnetlink_rcv_msg (net/core/rtnetlink.c:7132)
[   32.925528][ T2254]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   32.925529][ T2254]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   32.925533][ T2254]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   32.925535][ T2254]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   32.925539][ T2254]  netlink_rcv_skb (net/netlink/af_netlink.c:2556)
[   32.925541][ T2254]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   32.925544][ T2254]  ? netlink_ack (./include/linux/skbuff.h:2718)
[   32.925550][ T2254]  ? netlink_deliver_tap (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) ./include/net/netns/generic.h:48 (discriminator 2) net/netlink/af_netlink.c:334 (discriminator 2))
[   32.925552][ T2254]  ? netlink_deliver_tap (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) net/netlink/af_netlink.c:341 (discriminator 2))
[   32.925557][ T2254]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1345)
[   32.925561][ T2254]  ? netlink_attachskb (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[   32.925563][ T2254]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   32.925568][ T2254]  netlink_sendmsg (net/netlink/af_netlink.c:1900)
[   32.925572][ T2254]  ? netlink_unicast (./include/net/net_namespace.h:422 (discriminator 7))
[   32.925575][ T2254]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   32.925577][ T2254]  ? __import_iovec (lib/iov_iter.c:1358 lib/iov_iter.c:1373)
[   32.925582][ T2254]  __sock_sendmsg (net/socket.c:800 (discriminator 4) net/socket.c:815 (discriminator 4))
[   32.925585][ T2254]  ____sys_sendmsg (net/socket.c:2713)
[   32.925587][ T2254]  ? copy_msghdr_from_user (net/socket.c:2650)
[   32.925590][ T2254]  ? sock_write_iter (net/socket.c:1269)
[   32.925591][ T2254]  ? move_addr_to_kernel (net/socket.c:258)
[   32.925599][ T2254]  ___sys_sendmsg (net/socket.c:2767)
[   32.925601][ T2254]  ? copy_msghdr_from_user (net/socket.c:2619)
[   32.925617][ T2254]  __sys_sendmsg (net/socket.c:2799)
[   32.925620][ T2254]  ? __sys_sendmsg_sock (net/socket.c:2780)
[   32.925626][ T2254]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   32.925629][ T2254]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   32.925632][ T2254]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   32.925635][ T2254]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   32.925637][ T2254] RIP: 0033:0x7fbcd5a2c54e
[   32.925639][ T2254] Code: 4d 89 d8 e8 b4 bd 00 00 4c 8b 5d f8 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 11 c9 c3 0f 1f 80 00 00 00 00 48 8b 45 10 0f 05 <c9> c3 83 e2 39 83 fa 08 75 e7 e8 03 ff ff ff 0f 1f 00 f3 0f 1e fa
All code
========
   0:	4d 89 d8             	mov    %r11,%r8
   3:	e8 b4 bd 00 00       	call   0xbdbc
   8:	4c 8b 5d f8          	mov    -0x8(%rbp),%r11
   c:	41 8b 93 08 03 00 00 	mov    0x308(%r11),%edx
  13:	59                   	pop    %rcx
  14:	5e                   	pop    %rsi
  15:	48 83 f8 fc          	cmp    $0xfffffffffffffffc,%rax
  19:	74 11                	je     0x2c
  1b:	c9                   	leave
  1c:	c3                   	ret
  1d:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  24:	48 8b 45 10          	mov    0x10(%rbp),%rax
  28:	0f 05                	syscall
  2a:*	c9                   	leave		<-- trapping instruction
  2b:	c3                   	ret
  2c:	83 e2 39             	and    $0x39,%edx
  2f:	83 fa 08             	cmp    $0x8,%edx
  32:	75 e7                	jne    0x1b
  34:	e8 03 ff ff ff       	call   0xffffffffffffff3c
  39:	0f 1f 00             	nopl   (%rax)
  3c:	f3 0f 1e fa          	endbr64

Code starting with the faulting instruction
===========================================
   0:	c9                   	leave
   1:	c3                   	ret
   2:	83 e2 39             	and    $0x39,%edx
   5:	83 fa 08             	cmp    $0x8,%edx
   8:	75 e7                	jne    0xfffffffffffffff1
   a:	e8 03 ff ff ff       	call   0xffffffffffffff12
   f:	0f 1f 00             	nopl   (%rax)
  12:	f3 0f 1e fa          	endbr64
[   32.925641][ T2254] RSP: 002b:00007ffda16ceae0 EFLAGS: 00000202 ORIG_RAX: 000000000000002e
[   32.925644][ T2254] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fbcd5a2c54e
[   32.925645][ T2254] RDX: 0000000000000000 RSI: 00007ffda16ceb90 RDI: 0000000000000005
[   32.925646][ T2254] RBP: 00007ffda16ceaf0 R08: 0000000000000000 R09: 0000000000000000
[   32.925647][ T2254] R10: 0000000000000000 R11: 0000000000000202 R12: 000000006a915ce7
[   32.925648][ T2254] R13: 00000000004a1620 R14: 0000000000000000 R15: 00007ffda16cf250
| [   34.361055][   T38] softirqs last disabled at (352678): br_port_carrier_check (./include/linux/spinlock.h:353 net/bridge/br_if.c:87)
| [   34.361058][   T38] Preemption disabled at:
| [   34.361058][   T38] 0x0
| [   34.361069][   T38] Tainted: [W]=WARN
[   34.361070][   T38] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   34.361072][   T38] Workqueue: events_unbound linkwatch_event
[   34.361075][   T38] Call Trace:
[   34.361079][   T38]  <TASK>
[   34.361080][   T38]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   34.361087][   T38]  __might_resched.cold (kernel/sched/core.c:9234)
[   34.361092][   T38]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   34.361096][   T38]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   34.361100][   T38]  __kmalloc_noprof (./include/linux/sched/mm.h:322 (discriminator 2) mm/slub.c:4636 (discriminator 2) mm/slub.c:4974 (discriminator 2) mm/slub.c:5413 (discriminator 2) mm/slub.c:5439 (discriminator 2))
[   34.361102][   T38]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   34.361109][   T38]  ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:58 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[   34.361112][   T38]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   34.361116][   T38]  put_chars (drivers/char/virtio_console.c:1176)
[   34.361118][   T38]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   34.361121][   T38]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   34.361124][   T38]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   34.361127][   T38]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   34.361131][   T38]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   34.361135][   T38]  ? mark_usage (kernel/locking/lockdep.c:4690)
[   34.361137][   T38]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   34.361139][   T38]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   34.361143][   T38]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   34.361145][   T38]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   34.361150][   T38]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   34.361154][   T38]  console_emit_next_record (kernel/printk/printk.c:3183)
[   34.361158][   T38]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   34.361160][   T38]  ? console_flush_one_record (./include/linux/rcupdate.h:314 (discriminator 2) ./include/linux/srcu.h:439 (discriminator 2) kernel/printk/printk.c:291 (discriminator 2) kernel/printk/printk.c:3246 (discriminator 2))
[   34.361163][   T38]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   34.361165][   T38]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   34.361169][   T38]  console_flush_one_record (kernel/printk/printk.c:3268)
[   34.361174][   T38]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   34.361176][   T38]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   34.361181][   T38]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   34.361184][   T38]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   34.361186][   T38]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   34.361188][   T38]  ? lock_acquire (./include/linux/srcutree.h:374 ./include/linux/srcu.h:541 ./include/linux/srcu.h:645 ./include/trace/events/lock.h:23 ./include/trace/events/lock.h:23 kernel/locking/lockdep.c:5871)
[   34.361192][   T38]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   34.361193][   T38]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   34.361196][   T38]  vprintk_emit (kernel/printk/printk.c:2479)
[   34.361199][   T38]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   34.361201][   T38]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   34.361203][   T38]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   34.361207][   T38]  _printk (kernel/printk/printk.c:2504)
[   34.361211][   T38]  ? snapshot_read.cold (user.c:?)
[   34.361216][   T38]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   34.361220][   T38]  br_set_state (net/bridge/br_stp.c:57 (discriminator 2))
[   34.361224][   T38]  br_init_port (net/bridge/br_stp_if.c:39)
[   34.361227][   T38]  br_stp_enable_port (net/bridge/br_stp_if.c:93)
[   34.361229][   T38]  br_port_carrier_check (net/bridge/br_if.c:90)
[   34.361232][   T38]  br_device_event (net/bridge/br.c:101)
[   34.361236][   T38]  ? packet_sendmsg_spkt (af_packet.c:?)
[   34.361237][   T38]  ? nlmsg_notify (./include/net/netlink.h:1165 ./include/net/netlink.h:1184 net/netlink/af_netlink.c:2599)
[   34.361244][   T38]  notifier_call_chain (kernel/notifier.c:85)
[   34.361250][   T38]  netif_state_change (net/core/dev.c:1625)
[   34.361255][   T38]  ? call_netdevice_notifiers_info (./include/net/net_namespace.h:422 (discriminator 7))
[   34.361260][   T38]  ? linkwatch_do_dev (net/core/link_watch.c:182 net/core/link_watch.c:166)
[   34.361262][   T38]  __linkwatch_run_queue (net/core/link_watch.c:240)
[   34.361265][   T38]  ? linkwatch_do_dev (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[   34.361268][   T38]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   34.361272][   T38]  linkwatch_event (net/core/link_watch.c:314 (discriminator 11))
[   34.361274][   T38]  ? __linkwatch_run_queue (net/core/link_watch.c:213)
[   34.361278][   T38]  process_one_work (kernel/workqueue.c:3387)
[   34.361284][   T38]  ? __queue_delayed_work (kernel/workqueue.c:2622)
[   34.361287][   T38]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   34.361295][   T38]  worker_thread (kernel/workqueue.c:3470 kernel/workqueue.c:3551)
[   34.361302][   T38]  ? rescuer_thread (./include/linux/list.h:419 (discriminator 3))
[   34.361305][   T38]  kthread (kernel/kthread.c:436)
[   34.361307][   T38]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   34.361310][   T38]  ? kthread_affine_preferred (kernel/kthread.c:857)
[   34.361313][   T38]  ret_from_fork (arch/x86/kernel/process.c:158)
[   34.361317][   T38]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/vdso/vma.c:80 (discriminator 1))
[   34.361321][   T38]  ? __switch_to (arch/x86/kernel/process_64.c:403 arch/x86/kernel/process_64.c:663)
[   34.361324][   T38]  ? kthread_affine_preferred (kernel/kthread.c:857)
[   34.361327][   T38]  ret_from_fork_asm (arch/x86/entry/entry_64.S:245)
| [   35.389848][   T38] softirqs last disabled at (374658): br_port_carrier_check (./include/linux/spinlock.h:353 net/bridge/br_if.c:87)
| [   35.389851][   T38] Preemption disabled at:
| [   35.389852][   T38] 0x0
| [   35.389865][   T38] Tainted: [W]=WARN
[   35.389866][   T38] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   35.389869][   T38] Workqueue: events_unbound linkwatch_event
[   35.389873][   T38] Call Trace:
[   35.389875][   T38]  <TASK>
[   35.389877][   T38]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   35.389885][   T38]  __might_resched.cold (kernel/sched/core.c:9234)
[   35.389891][   T38]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   35.389897][   T38]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   35.389903][   T38]  __kmalloc_noprof (./include/linux/sched/mm.h:322 (discriminator 2) mm/slub.c:4636 (discriminator 2) mm/slub.c:4974 (discriminator 2) mm/slub.c:5413 (discriminator 2) mm/slub.c:5439 (discriminator 2))
[   35.389907][   T38]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   35.389917][   T38]  ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:58 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[   35.389920][   T38]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   35.389926][   T38]  put_chars (drivers/char/virtio_console.c:1176)
[   35.389930][   T38]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   35.389935][   T38]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   35.389940][   T38]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   35.389943][   T38]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   35.389951][   T38]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   35.389956][   T38]  ? mark_usage (kernel/locking/lockdep.c:4690)
[   35.389958][   T38]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   35.389961][   T38]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   35.389969][   T38]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   35.389971][   T38]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   35.389979][   T38]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   35.389986][   T38]  console_emit_next_record (kernel/printk/printk.c:3183)
[   35.389993][   T38]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   35.389995][   T38]  ? console_flush_one_record (./include/linux/rcupdate.h:314 (discriminator 2) ./include/linux/srcu.h:439 (discriminator 2) kernel/printk/printk.c:291 (discriminator 2) kernel/printk/printk.c:3246 (discriminator 2))
[   35.390001][   T38]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   35.390004][   T38]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   35.390011][   T38]  console_flush_one_record (kernel/printk/printk.c:3268)
[   35.390018][   T38]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   35.390021][   T38]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   35.390031][   T38]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   35.390036][   T38]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   35.390038][   T38]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   35.390042][   T38]  ? lock_acquire (./include/linux/srcutree.h:374 ./include/linux/srcu.h:541 ./include/linux/srcu.h:645 ./include/trace/events/lock.h:23 ./include/trace/events/lock.h:23 kernel/locking/lockdep.c:5871)
[   35.390048][   T38]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   35.390051][   T38]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   35.390056][   T38]  vprintk_emit (kernel/printk/printk.c:2479)
[   35.390062][   T38]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   35.390065][   T38]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   35.390069][   T38]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   35.390075][   T38]  _printk (kernel/printk/printk.c:2504)
[   35.390083][   T38]  ? snapshot_read.cold (user.c:?)
[   35.390092][   T38]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   35.390099][   T38]  br_set_state (net/bridge/br_stp.c:57 (discriminator 2))
[   35.390106][   T38]  br_init_port (net/bridge/br_stp_if.c:39)
[   35.390110][   T38]  br_stp_enable_port (net/bridge/br_stp_if.c:93)
[   35.390113][   T38]  br_port_carrier_check (net/bridge/br_if.c:90)
[   35.390120][   T38]  br_device_event (net/bridge/br.c:101)
[   35.390125][   T38]  ? packet_sendmsg_spkt (af_packet.c:?)
[   35.390127][   T38]  ? nlmsg_notify (./include/net/netlink.h:1165 ./include/net/netlink.h:1184 net/netlink/af_netlink.c:2599)
[   35.390138][   T38]  notifier_call_chain (kernel/notifier.c:85)
[   35.390148][   T38]  netif_state_change (net/core/dev.c:1625)
[   35.390155][   T38]  ? call_netdevice_notifiers_info (./include/net/net_namespace.h:422 (discriminator 7))
[   35.390164][   T38]  ? linkwatch_do_dev (net/core/link_watch.c:182 net/core/link_watch.c:166)
[   35.390167][   T38]  __linkwatch_run_queue (net/core/link_watch.c:240)
[   35.390173][   T38]  ? linkwatch_do_dev (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[   35.390177][   T38]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   35.390185][   T38]  linkwatch_event (net/core/link_watch.c:314 (discriminator 11))
[   35.390188][   T38]  ? __linkwatch_run_queue (net/core/link_watch.c:213)
[   35.390194][   T38]  process_one_work (kernel/workqueue.c:3387)
[   35.390206][   T38]  ? __queue_delayed_work (kernel/workqueue.c:2622)
[   35.390210][   T38]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   35.390224][   T38]  worker_thread (kernel/workqueue.c:3470 kernel/workqueue.c:3551)
[   35.390236][   T38]  ? rescuer_thread (./include/linux/list.h:419 (discriminator 3))
[   35.390240][   T38]  kthread (kernel/kthread.c:436)
[   35.390243][   T38]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   35.390247][   T38]  ? kthread_affine_preferred (kernel/kthread.c:857)
[   35.390252][   T38]  ret_from_fork (arch/x86/kernel/process.c:158)
[   35.390258][   T38]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/vdso/vma.c:80 (discriminator 1))
[   35.390264][   T38]  ? __switch_to (arch/x86/kernel/process_64.c:403 arch/x86/kernel/process_64.c:663)
[   35.390268][   T38]  ? kthread_affine_preferred (kernel/kthread.c:857)
[   35.390273][   T38]  ret_from_fork_asm (arch/x86/entry/entry_64.S:245)
| [   36.864500][   T38] softirqs last disabled at (396582): br_port_carrier_check (./include/linux/spinlock.h:353 net/bridge/br_if.c:87)
| [   36.864504][   T38] Preemption disabled at:
| [   36.864505][   T38] 0x0
| [   36.864518][   T38] Tainted: [W]=WARN
[   36.864519][   T38] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   36.864521][   T38] Workqueue: events_unbound linkwatch_event
[   36.864526][   T38] Call Trace:
[   36.864528][   T38]  <TASK>
[   36.864531][   T38]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   36.864539][   T38]  __might_resched.cold (kernel/sched/core.c:9234)
[   36.864545][   T38]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   36.864551][   T38]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   36.864558][   T38]  __kmalloc_noprof (./include/linux/sched/mm.h:322 (discriminator 2) mm/slub.c:4636 (discriminator 2) mm/slub.c:4974 (discriminator 2) mm/slub.c:5413 (discriminator 2) mm/slub.c:5439 (discriminator 2))
[   36.864561][   T38]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   36.864571][   T38]  ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:58 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[   36.864575][   T38]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   36.864581][   T38]  put_chars (drivers/char/virtio_console.c:1176)
[   36.864585][   T38]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   36.864590][   T38]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   36.864595][   T38]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   36.864598][   T38]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   36.864606][   T38]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   36.864611][   T38]  ? mark_usage (kernel/locking/lockdep.c:4690)
[   36.864614][   T38]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   36.864616][   T38]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   36.864624][   T38]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   36.864627][   T38]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   36.864634][   T38]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   36.864642][   T38]  console_emit_next_record (kernel/printk/printk.c:3183)
[   36.864648][   T38]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   36.864651][   T38]  ? console_flush_one_record (./include/linux/rcupdate.h:314 (discriminator 2) ./include/linux/srcu.h:439 (discriminator 2) kernel/printk/printk.c:291 (discriminator 2) kernel/printk/printk.c:3246 (discriminator 2))
[   36.864657][   T38]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   36.864660][   T38]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   36.864667][   T38]  console_flush_one_record (kernel/printk/printk.c:3268)
[   36.864674][   T38]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   36.864677][   T38]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   36.864687][   T38]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   36.864692][   T38]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   36.864695][   T38]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   36.864698][   T38]  ? lock_acquire (./include/linux/srcutree.h:374 ./include/linux/srcu.h:541 ./include/linux/srcu.h:645 ./include/trace/events/lock.h:23 ./include/trace/events/lock.h:23 kernel/locking/lockdep.c:5871)
[   36.864704][   T38]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   36.864707][   T38]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   36.864712][   T38]  vprintk_emit (kernel/printk/printk.c:2479)
[   36.864717][   T38]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   36.864721][   T38]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   36.864724][   T38]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   36.864731][   T38]  _printk (kernel/printk/printk.c:2504)
[   36.864736][   T38]  ? snapshot_read.cold (user.c:?)
[   36.864745][   T38]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   36.864752][   T38]  br_set_state (net/bridge/br_stp.c:57 (discriminator 2))
[   36.864759][   T38]  br_init_port (net/bridge/br_stp_if.c:39)
[   36.864764][   T38]  br_stp_enable_port (net/bridge/br_stp_if.c:93)
[   36.864767][   T38]  br_port_carrier_check (net/bridge/br_if.c:90)
[   36.864773][   T38]  br_device_event (net/bridge/br.c:101)
[   36.864778][   T38]  ? packet_sendmsg_spkt (af_packet.c:?)
[   36.864781][   T38]  ? nlmsg_notify (./include/net/netlink.h:1165 ./include/net/netlink.h:1184 net/netlink/af_netlink.c:2599)
[   36.864792][   T38]  notifier_call_chain (kernel/notifier.c:85)
[   36.864802][   T38]  netif_state_change (net/core/dev.c:1625)
[   36.864810][   T38]  ? call_netdevice_notifiers_info (./include/net/net_namespace.h:422 (discriminator 7))
[   36.864818][   T38]  ? linkwatch_do_dev (net/core/link_watch.c:182 net/core/link_watch.c:166)
[   36.864822][   T38]  __linkwatch_run_queue (net/core/link_watch.c:240)
[   36.864827][   T38]  ? linkwatch_do_dev (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[   36.864831][   T38]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   36.864839][   T38]  linkwatch_event (net/core/link_watch.c:314 (discriminator 11))
[   36.864843][   T38]  ? __linkwatch_run_queue (net/core/link_watch.c:213)
[   36.864849][   T38]  process_one_work (kernel/workqueue.c:3387)
[   36.864861][   T38]  ? __queue_delayed_work (kernel/workqueue.c:2622)
[   36.864866][   T38]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   36.864881][   T38]  worker_thread (kernel/workqueue.c:3470 kernel/workqueue.c:3551)
[   36.864894][   T38]  ? rescuer_thread (./include/linux/list.h:419 (discriminator 3))
[   36.864897][   T38]  kthread (kernel/kthread.c:436)
[   36.864900][   T38]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   36.864904][   T38]  ? kthread_affine_preferred (kernel/kthread.c:857)
[   36.864909][   T38]  ret_from_fork (arch/x86/kernel/process.c:158)
[   36.864916][   T38]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/vdso/vma.c:80 (discriminator 1))
[   36.864921][   T38]  ? __switch_to (arch/x86/kernel/process_64.c:403 arch/x86/kernel/process_64.c:663)
[   36.864926][   T38]  ? kthread_affine_preferred (kernel/kthread.c:857)
[   36.864931][   T38]  ret_from_fork_asm (arch/x86/entry/entry_64.S:245)
| [   38.428702][   T46] softirqs last disabled at (215692): br_port_carrier_check (./include/linux/spinlock.h:353 net/bridge/br_if.c:87)
| [   38.428705][   T46] Preemption disabled at:
| [   38.428705][   T46] 0x0
| [   38.428716][   T46] Tainted: [W]=WARN
[   38.428717][   T46] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   38.428718][   T46] Workqueue: events_unbound linkwatch_event
[   38.428722][   T46] Call Trace:
[   38.428723][   T46]  <TASK>
[   38.428725][   T46]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   38.428732][   T46]  __might_resched.cold (kernel/sched/core.c:9234)
[   38.428736][   T46]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   38.428741][   T46]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   38.428745][   T46]  __kmalloc_noprof (./include/linux/sched/mm.h:322 (discriminator 2) mm/slub.c:4636 (discriminator 2) mm/slub.c:4974 (discriminator 2) mm/slub.c:5413 (discriminator 2) mm/slub.c:5439 (discriminator 2))
[   38.428747][   T46]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   38.428754][   T46]  ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:58 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[   38.428757][   T46]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   38.428761][   T46]  put_chars (drivers/char/virtio_console.c:1176)
[   38.428763][   T46]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   38.428766][   T46]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   38.428769][   T46]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   38.428772][   T46]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   38.428776][   T46]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   38.428780][   T46]  ? mark_usage (kernel/locking/lockdep.c:4690)
[   38.428782][   T46]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   38.428784][   T46]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   38.428788][   T46]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   38.428790][   T46]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   38.428794][   T46]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   38.428799][   T46]  console_emit_next_record (kernel/printk/printk.c:3183)
[   38.428803][   T46]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   38.428804][   T46]  ? console_flush_one_record (./include/linux/rcupdate.h:314 (discriminator 2) ./include/linux/srcu.h:439 (discriminator 2) kernel/printk/printk.c:291 (discriminator 2) kernel/printk/printk.c:3246 (discriminator 2))
[   38.428808][   T46]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   38.428810][   T46]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   38.428814][   T46]  console_flush_one_record (kernel/printk/printk.c:3268)
[   38.428818][   T46]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   38.428820][   T46]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   38.428826][   T46]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   38.428829][   T46]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   38.428831][   T46]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   38.428832][   T46]  ? lock_acquire (./include/linux/srcutree.h:374 ./include/linux/srcu.h:541 ./include/linux/srcu.h:645 ./include/trace/events/lock.h:23 ./include/trace/events/lock.h:23 kernel/locking/lockdep.c:5871)
[   38.428836][   T46]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   38.428838][   T46]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   38.428841][   T46]  vprintk_emit (kernel/printk/printk.c:2479)
[   38.428844][   T46]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   38.428846][   T46]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   38.428848][   T46]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   38.428852][   T46]  _printk (kernel/printk/printk.c:2504)
[   38.428855][   T46]  ? snapshot_read.cold (user.c:?)
[   38.428861][   T46]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   38.428865][   T46]  br_set_state (net/bridge/br_stp.c:57 (discriminator 2))
[   38.428869][   T46]  br_init_port (net/bridge/br_stp_if.c:39)
[   38.428872][   T46]  br_stp_enable_port (net/bridge/br_stp_if.c:93)
[   38.428873][   T46]  br_port_carrier_check (net/bridge/br_if.c:90)
[   38.428877][   T46]  br_device_event (net/bridge/br.c:101)
[   38.428881][   T46]  ? packet_sendmsg_spkt (af_packet.c:?)
[   38.428882][   T46]  ? nlmsg_notify (./include/net/netlink.h:1165 ./include/net/netlink.h:1184 net/netlink/af_netlink.c:2599)
[   38.428889][   T46]  notifier_call_chain (kernel/notifier.c:85)
[   38.428895][   T46]  netif_state_change (net/core/dev.c:1625)
[   38.428900][   T46]  ? call_netdevice_notifiers_info (./include/net/net_namespace.h:422 (discriminator 7))
[   38.428905][   T46]  ? linkwatch_do_dev (net/core/link_watch.c:182 net/core/link_watch.c:166)
[   38.428907][   T46]  __linkwatch_run_queue (net/core/link_watch.c:240)
[   38.428910][   T46]  ? linkwatch_do_dev (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[   38.428913][   T46]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   38.428917][   T46]  linkwatch_event (net/core/link_watch.c:314 (discriminator 11))
[   38.428919][   T46]  ? __linkwatch_run_queue (net/core/link_watch.c:213)
[   38.428923][   T46]  process_one_work (kernel/workqueue.c:3387)
[   38.428929][   T46]  ? __queue_delayed_work (kernel/workqueue.c:2622)
[   38.428932][   T46]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   38.428940][   T46]  worker_thread (kernel/workqueue.c:3470 kernel/workqueue.c:3551)
[   38.428947][   T46]  ? rescuer_thread (./include/linux/list.h:419 (discriminator 3))
[   38.428949][   T46]  kthread (kernel/kthread.c:436)
[   38.428952][   T46]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   38.428955][   T46]  ? kthread_affine_preferred (kernel/kthread.c:857)
[   38.428958][   T46]  ret_from_fork (arch/x86/kernel/process.c:158)
[   38.428962][   T46]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/vdso/vma.c:80 (discriminator 1))
[   38.428966][   T46]  ? __switch_to (arch/x86/kernel/process_64.c:403 arch/x86/kernel/process_64.c:663)
[   38.428969][   T46]  ? kthread_affine_preferred (kernel/kthread.c:857)
[   38.428972][   T46]  ret_from_fork_asm (arch/x86/entry/entry_64.S:245)
| [   40.062190][ T2823] softirqs last disabled at (20700): __alloc_skb (./include/linux/bottom_half.h:20 (discriminator 2) net/core/skbuff.c:697 (discriminator 2))
| [   40.062193][ T2823] Preemption disabled at:
| [   40.062194][ T2823] vprintk_emit (kernel/printk/printk.c:2471)
| [   40.062202][ T2823] Tainted: [W]=WARN
[   40.062203][ T2823] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   40.062205][ T2823] Call Trace:
[   40.062206][ T2823]  <TASK>
[   40.062208][ T2823]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   40.062214][ T2823]  ? vprintk_emit (kernel/printk/printk.c:2471)
[   40.062216][ T2823]  __might_resched.cold (kernel/sched/core.c:9234)
[   40.062220][ T2823]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   40.062225][ T2823]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   40.062229][ T2823]  __kmalloc_noprof (./include/linux/sched/mm.h:322 (discriminator 2) mm/slub.c:4636 (discriminator 2) mm/slub.c:4974 (discriminator 2) mm/slub.c:5413 (discriminator 2) mm/slub.c:5439 (discriminator 2))
[   40.062231][ T2823]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   40.062238][ T2823]  ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:58 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[   40.062240][ T2823]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   40.062244][ T2823]  put_chars (drivers/char/virtio_console.c:1176)
[   40.062246][ T2823]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   40.062249][ T2823]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   40.062255][ T2823]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   40.062262][ T2823]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   40.062265][ T2823]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   40.062268][ T2823]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   40.062272][ T2823]  console_emit_next_record (kernel/printk/printk.c:3183)
[   40.062276][ T2823]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   40.062278][ T2823]  ? console_flush_one_record (./include/linux/rcupdate.h:314 (discriminator 2) ./include/linux/srcu.h:439 (discriminator 2) kernel/printk/printk.c:291 (discriminator 2) kernel/printk/printk.c:3246 (discriminator 2))
[   40.062281][ T2823]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   40.062283][ T2823]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   40.062287][ T2823]  console_flush_one_record (kernel/printk/printk.c:3268)
[   40.062291][ T2823]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   40.062293][ T2823]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   40.062299][ T2823]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   40.062302][ T2823]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   40.062303][ T2823]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   40.062305][ T2823]  ? lock_acquire (./include/linux/srcutree.h:374 ./include/linux/srcu.h:541 ./include/linux/srcu.h:645 ./include/trace/events/lock.h:23 ./include/trace/events/lock.h:23 kernel/locking/lockdep.c:5871)
[   40.062309][ T2823]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   40.062311][ T2823]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   40.062313][ T2823]  vprintk_emit (kernel/printk/printk.c:2479)
[   40.062316][ T2823]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   40.062318][ T2823]  ? rtnl_newlink (net/core/rtnetlink.c:4215)
[   40.062319][ T2823]  ? netlink_rcv_skb (net/netlink/af_netlink.c:2556)
[   40.062323][ T2823]  ? netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1345)
[   40.062324][ T2823]  ? netlink_sendmsg (net/netlink/af_netlink.c:1900)
[   40.062326][ T2823]  ? __sock_sendmsg (net/socket.c:800 (discriminator 4) net/socket.c:815 (discriminator 4))
[   40.062329][ T2823]  ? ____sys_sendmsg (net/socket.c:2713)
[   40.062330][ T2823]  ? ___sys_sendmsg (net/socket.c:2767)
[   40.062334][ T2823]  _printk (kernel/printk/printk.c:2504)
[   40.062337][ T2823]  ? snapshot_read.cold (user.c:?)
[   40.062342][ T2823]  ? netdev_name (./include/linux/netdevice.h:5709 (discriminator 1))
[   40.062346][ T2823]  ? __netdev_printk (net/core/dev.c:13148 (discriminator 2))
[   40.062350][ T2823]  netdev_info (net/core/dev.c:13195 (discriminator 3))
[   40.062353][ T2823]  ? netdev_notice (net/core/dev.c:13194)
[   40.062357][ T2823]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   40.062359][ T2823]  ? __up_read (kernel/locking/rwsem.c:1397 (discriminator 1))
[   40.062361][ T2823]  ? down_write_nested (kernel/locking/rwsem.c:1759)
[   40.062363][ T2823]  ? mutex_is_locked (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:3188 kernel/locking/mutex.h:48 kernel/locking/mutex.c:65)
[   40.062366][ T2823]  netif_set_allmulti.cold (net/core/dev.c:9731 (discriminator 3))
[   40.062370][ T2823]  dev_set_allmulti (net/core/dev_api.c:315)
[   40.062373][ T2823]  del_nbp (net/bridge/br_if.c:253 net/bridge/br_if.c:341)
[   40.062380][ T2823]  br_del_if (net/bridge/br_if.c:732)
[   40.062382][ T2823]  ? rtnl_is_locked (net/core/rtnetlink.c:169)
[   40.062385][ T2823]  do_set_master (net/core/rtnetlink.c:3055)
[   40.062388][ T2823]  do_setlink.isra.0 (net/core/rtnetlink.c:3273 (discriminator 1))
[   40.062392][ T2823]  ? stack_trace_save (kernel/stacktrace.c:122 (discriminator 1))
[   40.062395][ T2823]  ? rtnl_link_get_size (net/core/rtnetlink.c:747)
[   40.062397][ T2823]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:388 kernel/rcu/update.c:380)
[   40.062399][ T2823]  ? stack_depot_save_flags (lib/stackdepot.c:609 (discriminator 2) lib/stackdepot.c:676 (discriminator 2))
[   40.062403][ T2823]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   40.062405][ T2823]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   40.062407][ T2823]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   40.062409][ T2823]  ? kasan_save_stack (mm/kasan/common.c:58)
[   40.062411][ T2823]  ? kasan_save_stack (mm/kasan/common.c:57)
[   40.062413][ T2823]  ? kasan_save_track (mm/kasan/common.c:78)
[   40.062414][ T2823]  ? __kasan_kmalloc (mm/kasan/common.c:398 mm/kasan/common.c:415)
[   40.062416][ T2823]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   40.062418][ T2823]  ? snd_ac97_proc_read_main (sound/pci/ac97/ac97_proc.c:320)
[   40.062421][ T2823]  ? ___sys_sendmsg (net/socket.c:2758)
[   40.062424][ T2823]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   40.062426][ T2823]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   40.062429][ T2823]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   40.062430][ T2823]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   40.062432][ T2823]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   40.062433][ T2823]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   40.062435][ T2823]  ? trace_contention_end (./include/trace/events/lock.h:121 (discriminator 22))
[   40.062437][ T2823]  ? __mutex_lock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:3188 kernel/locking/mutex.c:89 kernel/locking/mutex.c:134 kernel/locking/mutex.c:649 kernel/locking/mutex.c:821)
[   40.062440][ T2823]  ? __mutex_lock (kernel/locking/mutex.c:656 (discriminator 1) kernel/locking/mutex.c:821 (discriminator 1))
[   40.062442][ T2823]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   40.062445][ T2823]  ? ww_mutex_lock (kernel/locking/mutex.c:934)
[   40.062446][ T2823]  ? nla_get_range_signed (lib/nlattr.c:270)
[   40.062451][ T2823]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   40.062453][ T2823]  ? __rtnl_newlink (net/core/rtnetlink.c:4063)
[   40.062459][ T2823]  rtnl_newlink (net/core/rtnetlink.c:4215)
[   40.062464][ T2823]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   40.062466][ T2823]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   40.062471][ T2823]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   40.062478][ T2823]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   40.062480][ T2823]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   40.062482][ T2823]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   40.062485][ T2823]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   40.062487][ T2823]  rtnetlink_rcv_msg (net/core/rtnetlink.c:7132)
[   40.062490][ T2823]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   40.062492][ T2823]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   40.062496][ T2823]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   40.062498][ T2823]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   40.062502][ T2823]  netlink_rcv_skb (net/netlink/af_netlink.c:2556)
[   40.062503][ T2823]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   40.062506][ T2823]  ? netlink_ack (./include/linux/skbuff.h:2718)
[   40.062513][ T2823]  ? netlink_deliver_tap (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) ./include/net/netns/generic.h:48 (discriminator 2) net/netlink/af_netlink.c:334 (discriminator 2))
[   40.062515][ T2823]  ? netlink_deliver_tap (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) net/netlink/af_netlink.c:341 (discriminator 2))
[   40.062519][ T2823]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1345)
[   40.062523][ T2823]  ? netlink_attachskb (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[   40.062526][ T2823]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   40.062530][ T2823]  netlink_sendmsg (net/netlink/af_netlink.c:1900)
[   40.062534][ T2823]  ? netlink_unicast (./include/net/net_namespace.h:422 (discriminator 7))
[   40.062538][ T2823]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   40.062539][ T2823]  ? __import_iovec (lib/iov_iter.c:1358 lib/iov_iter.c:1373)
[   40.062545][ T2823]  __sock_sendmsg (net/socket.c:800 (discriminator 4) net/socket.c:815 (discriminator 4))
[   40.062548][ T2823]  ____sys_sendmsg (net/socket.c:2713)
[   40.062550][ T2823]  ? copy_msghdr_from_user (net/socket.c:2650)
[   40.062552][ T2823]  ? sock_write_iter (net/socket.c:1269)
[   40.062554][ T2823]  ? move_addr_to_kernel (net/socket.c:258)
[   40.062561][ T2823]  ___sys_sendmsg (net/socket.c:2767)
[   40.062564][ T2823]  ? copy_msghdr_from_user (net/socket.c:2619)
[   40.062579][ T2823]  __sys_sendmsg (net/socket.c:2799)
[   40.062582][ T2823]  ? __sys_sendmsg_sock (net/socket.c:2780)
[   40.062588][ T2823]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   40.062591][ T2823]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   40.062594][ T2823]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   40.062597][ T2823]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   40.062600][ T2823] RIP: 0033:0x7f63df84b54e
[   40.062603][ T2823] Code: 4d 89 d8 e8 b4 bd 00 00 4c 8b 5d f8 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 11 c9 c3 0f 1f 80 00 00 00 00 48 8b 45 10 0f 05 <c9> c3 83 e2 39 83 fa 08 75 e7 e8 03 ff ff ff 0f 1f 00 f3 0f 1e fa
All code
========
   0:	4d 89 d8             	mov    %r11,%r8
   3:	e8 b4 bd 00 00       	call   0xbdbc
   8:	4c 8b 5d f8          	mov    -0x8(%rbp),%r11
   c:	41 8b 93 08 03 00 00 	mov    0x308(%r11),%edx
  13:	59                   	pop    %rcx
  14:	5e                   	pop    %rsi
  15:	48 83 f8 fc          	cmp    $0xfffffffffffffffc,%rax
  19:	74 11                	je     0x2c
  1b:	c9                   	leave
  1c:	c3                   	ret
  1d:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  24:	48 8b 45 10          	mov    0x10(%rbp),%rax
  28:	0f 05                	syscall
  2a:*	c9                   	leave		<-- trapping instruction
  2b:	c3                   	ret
  2c:	83 e2 39             	and    $0x39,%edx
  2f:	83 fa 08             	cmp    $0x8,%edx
  32:	75 e7                	jne    0x1b
  34:	e8 03 ff ff ff       	call   0xffffffffffffff3c
  39:	0f 1f 00             	nopl   (%rax)
  3c:	f3 0f 1e fa          	endbr64

Code starting with the faulting instruction
===========================================
   0:	c9                   	leave
   1:	c3                   	ret
   2:	83 e2 39             	and    $0x39,%edx
   5:	83 fa 08             	cmp    $0x8,%edx
   8:	75 e7                	jne    0xfffffffffffffff1
   a:	e8 03 ff ff ff       	call   0xffffffffffffff12
   f:	0f 1f 00             	nopl   (%rax)
  12:	f3 0f 1e fa          	endbr64
[   40.062605][ T2823] RSP: 002b:00007ffd29b9c390 EFLAGS: 00000202 ORIG_RAX: 000000000000002e
[   40.062608][ T2823] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f63df84b54e
[   40.062609][ T2823] RDX: 0000000000000000 RSI: 00007ffd29b9c440 RDI: 0000000000000005
[   40.062610][ T2823] RBP: 00007ffd29b9c3a0 R08: 0000000000000000 R09: 0000000000000000
[   40.062611][ T2823] R10: 0000000000000000 R11: 0000000000000202 R12: 000000006a915cee


Finger prints:
__irq_exit_rcu:dump_stack_lvl:__kmalloc_noprof:put_chars:hvc_console_print
br_device_event:dump_stack_lvl:__kmalloc_noprof:put_chars:hvc_console_print
br_port_carrier_check:dump_stack_lvl:__kmalloc_noprof:put_chars:hvc_console_print
__alloc_skb:vprintk_emit:dump_stack_lvl:__kmalloc_noprof:put_chars