======================================
| [   11.118896][  T219] softirqs last disabled at (35303): __irq_exit_rcu (kernel/softirq.c:679 kernel/softirq.c:519 kernel/softirq.c:767)
| [   11.118899][  T219] Preemption disabled at:
| [   11.118900][  T219] 0x0
| [   11.118914][  T219] Tainted: [W]=WARN
[   11.118915][  T219] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   11.118918][  T219] Call Trace:
[   11.118920][  T219]  <TASK>
[   11.118922][  T219]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   11.118931][  T219]  __might_resched.cold (kernel/sched/core.c:9234)
[   11.118937][  T219]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   11.118943][  T219]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   11.118949][  T219]  __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))
[   11.118953][  T219]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   11.118963][  T219]  ? 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)
[   11.118966][  T219]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   11.118972][  T219]  put_chars (drivers/char/virtio_console.c:1176)
[   11.118976][  T219]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   11.118978][  T219]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   11.118984][  T219]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   11.118993][  T219]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   11.119010][  T219]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   11.119014][  T219]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.119017][  T219]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   11.119024][  T219]  console_emit_next_record (kernel/printk/printk.c:3183)
[   11.119031][  T219]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   11.119033][  T219]  ? 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))
[   11.119039][  T219]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.119042][  T219]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   11.119049][  T219]  console_flush_one_record (kernel/printk/printk.c:3268)
[   11.119056][  T219]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   11.119059][  T219]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   11.119069][  T219]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   11.119073][  T219]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   11.119076][  T219]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.119079][  T219]  ? 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)
[   11.119085][  T219]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   11.119088][  T219]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   11.119095][  T219]  vprintk_emit (kernel/printk/printk.c:2479)
[   11.119100][  T219]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   11.119106][  T219]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   11.119112][  T219]  _printk (kernel/printk/printk.c:2504)
[   11.119117][  T219]  ? snapshot_read.cold (user.c:?)
[   11.119121][  T219]  ? 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)
[   11.119126][  T219]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[   11.119132][  T219]  ? 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)
[   11.119137][  T219]  do_exit.cold (kernel/exit.c:889 (discriminator 4) kernel/exit.c:1043 (discriminator 4))
[   11.119142][  T219]  ? exit_notify (kernel/exit.c:780)
[   11.119144][  T219]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   11.119149][  T219]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.119156][  T219]  do_group_exit (kernel/exit.c:1151)
[   11.119161][  T219]  __x64_sys_exit_group (kernel/exit.c:1162 kernel/exit.c:1160 kernel/exit.c:1160)
[   11.119164][  T219]  x64_sys_call (./arch/x86/include/generated/asm/syscalls_64.h:232)
[   11.119168][  T219]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   11.119173][  T219]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   11.119178][  T219]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   11.119181][  T219] RIP: 0033:0x7fca962be1b8
[   11.119184][  T219] Code: Unable to access opcode bytes at 0x7fca962be18e.

Code starting with the faulting instruction
===========================================
[   11.119186][  T219] RSP: 002b:00007ffe84122678 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   11.119190][  T219] RAX: ffffffffffffffda RBX: 00007fca963eef88 RCX: 00007fca962be1b8
[   11.119192][  T219] RDX: 00007fca96008fc8 RSI: fffffffffffffeb8 RDI: 0000000000000000
[   11.119194][  T219] RBP: 00007ffe841226d0 R08: 0000000000000000 R09: 0000000000000050
[   11.119195][  T219] R10: 00007ffe84122490 R11: 0000000000000246 R12: 0000000000000001
[   11.119196][  T219] R13: 0000000000000000 R14: 00007fca963ed680 R15: 00007fca963eefa0
| [   12.217272][  T263] softirqs last disabled at (21010): __alloc_skb (./include/linux/bottom_half.h:20 (discriminator 2) net/core/skbuff.c:697 (discriminator 2))
| [   12.217275][  T263] Preemption disabled at:
| [   12.217276][  T263] vprintk_emit (kernel/printk/printk.c:2471)
| [   12.217284][  T263] Tainted: [W]=WARN
[   12.217285][  T263] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   12.217287][  T263] Call Trace:
[   12.217289][  T263]  <TASK>
[   12.217290][  T263]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   12.217296][  T263]  ? vprintk_emit (kernel/printk/printk.c:2471)
[   12.217298][  T263]  __might_resched.cold (kernel/sched/core.c:9234)
[   12.217302][  T263]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   12.217306][  T263]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   12.217311][  T263]  __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))
[   12.217312][  T263]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   12.217319][  T263]  ? 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)
[   12.217322][  T263]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   12.217326][  T263]  put_chars (drivers/char/virtio_console.c:1176)
[   12.217328][  T263]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   12.217329][  T263]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   12.217333][  T263]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   12.217338][  T263]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   12.217346][  T263]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   12.217349][  T263]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.217351][  T263]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   12.217355][  T263]  console_emit_next_record (kernel/printk/printk.c:3183)
[   12.217359][  T263]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   12.217361][  T263]  ? 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))
[   12.217364][  T263]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.217365][  T263]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   12.217369][  T263]  console_flush_one_record (kernel/printk/printk.c:3268)
[   12.217374][  T263]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   12.217376][  T263]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.217381][  T263]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   12.217384][  T263]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   12.217386][  T263]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.217387][  T263]  ? 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)
[   12.217391][  T263]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   12.217393][  T263]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   12.217396][  T263]  vprintk_emit (kernel/printk/printk.c:2479)
[   12.217399][  T263]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   12.217401][  T263]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   12.217406][  T263]  _printk (kernel/printk/printk.c:2504)
[   12.217410][  T263]  ? snapshot_read.cold (user.c:?)
[   12.217414][  T263]  ? br_multicast_flood (??:?)
[   12.217417][  T263]  ? do_setlink.isra.0 (net/core/rtnetlink.c:3273 (discriminator 1))
[   12.217418][  T263]  ? rtnl_newlink (net/core/rtnetlink.c:4215)
[   12.217420][  T263]  ? rtnetlink_rcv_msg (net/core/rtnetlink.c:7132)
[   12.217424][  T263]  br_set_state (net/bridge/br_stp.c:57 (discriminator 2))
[   12.217429][  T263]  br_init_port (net/bridge/br_stp_if.c:39)
[   12.217432][  T263]  new_nbp (net/bridge/br_if.c:449)
[   12.217436][  T263]  br_add_if (net/bridge/br_if.c:592)
[   12.217438][  T263]  ? is_bpf_text_address (./include/linux/rcupdate.h:882 kernel/bpf/core.c:751)
[   12.217442][  T263]  ? kernel_text_address (kernel/extable.c:125 kernel/extable.c:94)
[   12.217448][  T263]  do_set_master (net/core/rtnetlink.c:3071)
[   12.217452][  T263]  do_setlink.isra.0 (net/core/rtnetlink.c:3273 (discriminator 1))
[   12.217455][  T263]  ? stack_trace_save (kernel/stacktrace.c:122 (discriminator 1))
[   12.217458][  T263]  ? rtnl_link_get_size (net/core/rtnetlink.c:747)
[   12.217460][  T263]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:388 kernel/rcu/update.c:380)
[   12.217463][  T263]  ? stack_depot_save_flags (lib/stackdepot.c:609 (discriminator 2) lib/stackdepot.c:676 (discriminator 2))
[   12.217466][  T263]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   12.217468][  T263]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   12.217470][  T263]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   12.217473][  T263]  ? kasan_save_stack (mm/kasan/common.c:58)
[   12.217475][  T263]  ? kasan_save_stack (mm/kasan/common.c:57)
[   12.217477][  T263]  ? kasan_save_track (mm/kasan/common.c:78)
[   12.217478][  T263]  ? __kasan_kmalloc (mm/kasan/common.c:398 mm/kasan/common.c:415)
[   12.217480][  T263]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.217482][  T263]  ? snd_ac97_proc_read_main (sound/pci/ac97/ac97_proc.c:320)
[   12.217485][  T263]  ? ___sys_sendmsg (net/socket.c:2758)
[   12.217489][  T263]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   12.217491][  T263]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   12.217493][  T263]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.217495][  T263]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   12.217497][  T263]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.217498][  T263]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.217499][  T263]  ? trace_contention_end (./include/trace/events/lock.h:121 (discriminator 22))
[   12.217502][  T263]  ? __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)
[   12.217505][  T263]  ? __mutex_lock (kernel/locking/mutex.c:656 (discriminator 1) kernel/locking/mutex.c:821 (discriminator 1))
[   12.217506][  T263]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   12.217510][  T263]  ? ww_mutex_lock (kernel/locking/mutex.c:934)
[   12.217511][  T263]  ? nla_get_range_signed (lib/nlattr.c:270)
[   12.217516][  T263]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.217518][  T263]  ? __rtnl_newlink (net/core/rtnetlink.c:4063)
[   12.217523][  T263]  rtnl_newlink (net/core/rtnetlink.c:4215)
[   12.217529][  T263]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   12.217531][  T263]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.217535][  T263]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   12.217537][  T263]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   12.217539][  T263]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   12.217541][  T263]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   12.217545][  T263]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   12.217547][  T263]  rtnetlink_rcv_msg (net/core/rtnetlink.c:7132)
[   12.217550][  T263]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   12.217551][  T263]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.217556][  T263]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   12.217558][  T263]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   12.217561][  T263]  netlink_rcv_skb (net/netlink/af_netlink.c:2556)
[   12.217564][  T263]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   12.217567][  T263]  ? netlink_ack (./include/linux/skbuff.h:2718)
[   12.217574][  T263]  ? 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))
[   12.217576][  T263]  ? 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))
[   12.217580][  T263]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1345)
[   12.217584][  T263]  ? netlink_attachskb (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[   12.217587][  T263]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   12.217591][  T263]  netlink_sendmsg (net/netlink/af_netlink.c:1900)
[   12.217595][  T263]  ? netlink_unicast (./include/net/net_namespace.h:422 (discriminator 7))
[   12.217599][  T263]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   12.217601][  T263]  ? __import_iovec (lib/iov_iter.c:1358 lib/iov_iter.c:1373)
[   12.217606][  T263]  __sock_sendmsg (net/socket.c:800 (discriminator 4) net/socket.c:815 (discriminator 4))
[   12.217609][  T263]  ____sys_sendmsg (net/socket.c:2713)
[   12.217612][  T263]  ? copy_msghdr_from_user (net/socket.c:2650)
[   12.217614][  T263]  ? sock_write_iter (net/socket.c:1269)
[   12.217616][  T263]  ? move_addr_to_kernel (net/socket.c:258)
[   12.217623][  T263]  ___sys_sendmsg (net/socket.c:2767)
[   12.217626][  T263]  ? copy_msghdr_from_user (net/socket.c:2619)
[   12.217642][  T263]  __sys_sendmsg (net/socket.c:2799)
[   12.217645][  T263]  ? __sys_sendmsg_sock (net/socket.c:2780)
[   12.217651][  T263]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.217654][  T263]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   12.217657][  T263]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   12.217660][  T263]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   12.217663][  T263] RIP: 0033:0x7fe9399dd54e
[   12.217666][  T263] 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
[   12.217668][  T263] RSP: 002b:00007ffc076fe570 EFLAGS: 00000202 ORIG_RAX: 000000000000002e
[   12.217671][  T263] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fe9399dd54e
[   12.217673][  T263] RDX: 0000000000000000 RSI: 00007ffc076fe620 RDI: 0000000000000005
[   12.217673][  T263] RBP: 00007ffc076fe580 R08: 0000000000000000 R09: 0000000000000000
[   12.217674][  T263] R10: 0000000000000000 R11: 0000000000000202 R12: 000000006a918b32
[   12.217675][  T263] R13: 00000000004a1620 R14: 0000000000000000 R15: 00007ffc076fecf0
| [   13.249758][  T292] softirqs last disabled at (23210): br_device_event (./include/linux/spinlock.h:353 net/bridge/br.c:119)
| [   13.249760][  T292] Preemption disabled at:
| [   13.249761][  T292] 0x0
| [   13.249771][  T292] Tainted: [W]=WARN
[   13.249772][  T292] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   13.249773][  T292] Call Trace:
[   13.249775][  T292]  <TASK>
[   13.249776][  T292]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   13.249783][  T292]  __might_resched.cold (kernel/sched/core.c:9234)
[   13.249787][  T292]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   13.249792][  T292]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   13.249796][  T292]  __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))
[   13.249798][  T292]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   13.249804][  T292]  ? 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)
[   13.249807][  T292]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   13.249811][  T292]  put_chars (drivers/char/virtio_console.c:1176)
[   13.249813][  T292]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   13.249814][  T292]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   13.249818][  T292]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   13.249824][  T292]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   13.249831][  T292]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   13.249834][  T292]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   13.249836][  T292]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   13.249840][  T292]  console_emit_next_record (kernel/printk/printk.c:3183)
[   13.249844][  T292]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   13.249846][  T292]  ? 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))
[   13.249849][  T292]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   13.249851][  T292]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   13.249855][  T292]  console_flush_one_record (kernel/printk/printk.c:3268)
[   13.249859][  T292]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   13.249861][  T292]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   13.249866][  T292]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   13.249869][  T292]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   13.249871][  T292]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   13.249873][  T292]  ? 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)
[   13.249876][  T292]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   13.249878][  T292]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   13.249881][  T292]  vprintk_emit (kernel/printk/printk.c:2479)
[   13.249884][  T292]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   13.249886][  T292]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   13.249888][  T292]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   13.249893][  T292]  _printk (kernel/printk/printk.c:2504)
[   13.249897][  T292]  ? snapshot_read.cold (user.c:?)
[   13.249902][  T292]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   13.249906][  T292]  br_set_state (net/bridge/br_stp.c:57 (discriminator 2))
[   13.249911][  T292]  br_init_port (net/bridge/br_stp_if.c:39)
[   13.249913][  T292]  br_stp_enable_port (net/bridge/br_stp_if.c:93)
[   13.249915][  T292]  br_device_event (net/bridge/br.c:120)
[   13.249918][  T292]  ? packet_sendmsg_spkt (af_packet.c:?)
[   13.249920][  T292]  ? nlmsg_notify (./include/net/netlink.h:1165 ./include/net/netlink.h:1184 net/netlink/af_netlink.c:2599)
[   13.249927][  T292]  notifier_call_chain (kernel/notifier.c:85)
[   13.249932][  T292]  __dev_notify_flags (net/core/dev.c:2313 net/core/dev.c:2327 net/core/dev.c:9853)
[   13.249937][  T292]  ? netif_change_name (net/core/dev.c:1517)
[   13.249941][  T292]  ? netif_set_allmulti (./include/net/netdev_lock.h:33)
[   13.249944][  T292]  ? kernel_text_address (kernel/extable.c:125 kernel/extable.c:94)
[   13.249947][  T292]  ? __kernel_text_address (kernel/extable.c:79)
[   13.249948][  T292]  ? write_profile (profile.c:?)
[   13.249953][  T292]  netif_change_flags (net/core/dev.c:9882)
[   13.249957][  T292]  do_setlink.isra.0 (net/core/rtnetlink.c:3266 (discriminator 1))
[   13.249960][  T292]  ? stack_trace_save (kernel/stacktrace.c:122 (discriminator 1))
[   13.249962][  T292]  ? rtnl_link_get_size (net/core/rtnetlink.c:747)
[   13.249964][  T292]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:388 kernel/rcu/update.c:380)
[   13.249966][  T292]  ? stack_depot_save_flags (lib/stackdepot.c:609 (discriminator 2) lib/stackdepot.c:676 (discriminator 2))
[   13.249969][  T292]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   13.249971][  T292]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   13.249973][  T292]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   13.249975][  T292]  ? kasan_save_stack (mm/kasan/common.c:58)
[   13.249977][  T292]  ? kasan_save_stack (mm/kasan/common.c:57)
[   13.249979][  T292]  ? kasan_save_track (mm/kasan/common.c:78)
[   13.249980][  T292]  ? __kasan_kmalloc (mm/kasan/common.c:398 mm/kasan/common.c:415)
[   13.249982][  T292]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   13.249984][  T292]  ? snd_ac97_proc_read_main (sound/pci/ac97/ac97_proc.c:320)
[   13.249987][  T292]  ? ___sys_sendmsg (net/socket.c:2758)
[   13.249991][  T292]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   13.249993][  T292]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   13.249996][  T292]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   13.249997][  T292]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   13.249999][  T292]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   13.250000][  T292]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   13.250002][  T292]  ? trace_contention_end (./include/trace/events/lock.h:121 (discriminator 22))
[   13.250004][  T292]  ? __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)
[   13.250007][  T292]  ? __mutex_lock (kernel/locking/mutex.c:656 (discriminator 1) kernel/locking/mutex.c:821 (discriminator 1))
[   13.250009][  T292]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   13.250018][  T292]  ? ww_mutex_lock (kernel/locking/mutex.c:934)
[   13.250021][  T292]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   13.250024][  T292]  ? __rtnl_newlink (net/core/rtnetlink.c:4063)
[   13.250029][  T292]  rtnl_newlink (net/core/rtnetlink.c:4215)
[   13.250034][  T292]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   13.250036][  T292]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   13.250041][  T292]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   13.250043][  T292]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   13.250045][  T292]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   13.250046][  T292]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   13.250050][  T292]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   13.250052][  T292]  rtnetlink_rcv_msg (net/core/rtnetlink.c:7132)
[   13.250055][  T292]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   13.250057][  T292]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   13.250061][  T292]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   13.250063][  T292]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   13.250067][  T292]  netlink_rcv_skb (net/netlink/af_netlink.c:2556)
[   13.250069][  T292]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   13.250072][  T292]  ? netlink_ack (./include/linux/skbuff.h:2718)
[   13.250078][  T292]  ? 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))
[   13.250080][  T292]  ? 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))
[   13.250085][  T292]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1345)
[   13.250089][  T292]  ? netlink_attachskb (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[   13.250093][  T292]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   13.250097][  T292]  netlink_sendmsg (net/netlink/af_netlink.c:1900)
[   13.250101][  T292]  ? netlink_unicast (./include/net/net_namespace.h:422 (discriminator 7))
[   13.250105][  T292]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   13.250107][  T292]  ? __import_iovec (lib/iov_iter.c:1358 lib/iov_iter.c:1373)
[   13.250112][  T292]  __sock_sendmsg (net/socket.c:800 (discriminator 4) net/socket.c:815 (discriminator 4))
[   13.250115][  T292]  ____sys_sendmsg (net/socket.c:2713)
[   13.250117][  T292]  ? copy_msghdr_from_user (net/socket.c:2650)
[   13.250120][  T292]  ? sock_write_iter (net/socket.c:1269)
[   13.250121][  T292]  ? move_addr_to_kernel (net/socket.c:258)
[   13.250129][  T292]  ___sys_sendmsg (net/socket.c:2767)
[   13.250132][  T292]  ? copy_msghdr_from_user (net/socket.c:2619)
[   13.250147][  T292]  __sys_sendmsg (net/socket.c:2799)
[   13.250150][  T292]  ? __sys_sendmsg_sock (net/socket.c:2780)
[   13.250157][  T292]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   13.250160][  T292]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   13.250163][  T292]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   13.250165][  T292]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   13.250168][  T292] RIP: 0033:0x7f87e470b54e
[   13.250170][  T292] 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
[   13.250171][  T292] RSP: 002b:00007ffe1f456620 EFLAGS: 00000202 ORIG_RAX: 000000000000002e
[   13.250174][  T292] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f87e470b54e
[   13.250175][  T292] RDX: 0000000000000000 RSI: 00007ffe1f4566d0 RDI: 0000000000000005
[   13.250176][  T292] RBP: 00007ffe1f456630 R08: 0000000000000000 R09: 0000000000000000
[   13.250177][  T292] R10: 0000000000000000 R11: 0000000000000202 R12: 000000006a918b33


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
__alloc_skb:vprintk_emit:dump_stack_lvl:__kmalloc_noprof:put_chars