======================================
| [   11.299293][  T194] softirqs last disabled at (28586): netlink_release (./include/net/sock.h:2138 net/netlink/af_netlink.c:727)
| [   11.299295][  T194] Preemption disabled at:
| [   11.299296][  T194] 0x0
| [   11.299307][  T194] Tainted: [W]=WARN
[   11.299308][  T194] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   11.299310][  T194] Call Trace:
[   11.299312][  T194]  <TASK>
[   11.299313][  T194]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   11.299319][  T194]  __might_resched.cold (kernel/sched/core.c:9234)
[   11.299324][  T194]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   11.299328][  T194]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   11.299333][  T194]  __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))
[   11.299335][  T194]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   11.299341][  T194]  ? 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)
[   11.299344][  T194]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   11.299347][  T194]  put_chars (drivers/char/virtio_console.c:1176)
[   11.299349][  T194]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   11.299351][  T194]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   11.299355][  T194]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   11.299360][  T194]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   11.299367][  T194]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   11.299369][  T194]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.299371][  T194]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   11.299375][  T194]  console_emit_next_record (kernel/printk/printk.c:3183)
[   11.299379][  T194]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   11.299381][  T194]  ? 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))
[   11.299384][  T194]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.299386][  T194]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   11.299390][  T194]  console_flush_one_record (kernel/printk/printk.c:3268)
[   11.299394][  T194]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   11.299396][  T194]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   11.299401][  T194]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   11.299404][  T194]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   11.299405][  T194]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.299408][  T194]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   11.299411][  T194]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   11.299413][  T194]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   11.299416][  T194]  vprintk_emit (kernel/printk/printk.c:2479)
[   11.299420][  T194]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   11.299423][  T194]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   11.299427][  T194]  _printk (kernel/printk/printk.c:2504)
[   11.299431][  T194]  ? snapshot_read.cold (user.c:?)
[   11.299433][  T194]  ? 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)
[   11.299436][  T194]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[   11.299440][  T194]  ? 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)
[   11.299442][  T194]  do_exit.cold (kernel/exit.c:889 (discriminator 4) kernel/exit.c:1043 (discriminator 4))
[   11.299446][  T194]  ? exit_notify (kernel/exit.c:780)
[   11.299448][  T194]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   11.299451][  T194]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.299455][  T194]  do_group_exit (kernel/exit.c:1151)
[   11.299457][  T194]  __x64_sys_exit_group (kernel/exit.c:1162 kernel/exit.c:1160 kernel/exit.c:1160)
[   11.299459][  T194]  x64_sys_call (./arch/x86/include/generated/asm/syscalls_64.h:232)
[   11.299461][  T194]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   11.299464][  T194]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   11.299467][  T194]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   11.299470][  T194] RIP: 0033:0x7fc2460741b8
[   11.299472][  T194] Code: Unable to access opcode bytes at 0x7fc24607418e.

Code starting with the faulting instruction
===========================================
[   11.299473][  T194] RSP: 002b:00007ffe3c841298 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   11.299475][  T194] RAX: ffffffffffffffda RBX: 00007fc2461a4f88 RCX: 00007fc2460741b8
[   11.299477][  T194] RDX: 00007fc245dbefc8 RSI: fffffffffffffeb8 RDI: 0000000000000000
[   11.299478][  T194] RBP: 00007ffe3c8412f0 R08: 0000000000000000 R09: 0000000000008010
[   11.299479][  T194] R10: 00007ffe3c8410b0 R11: 0000000000000246 R12: 0000000000000001
[   11.299479][  T194] R13: 0000000000000000 R14: 00007fc2461a3680 R15: 00007fc2461a4fa0
| [   12.759546][  T253] softirqs last disabled at (19904): __alloc_skb (./include/linux/bottom_half.h:20 (discriminator 2) net/core/skbuff.c:697 (discriminator 2))
| [   12.759549][  T253] Preemption disabled at:
| [   12.759549][  T253] vprintk_emit (kernel/printk/printk.c:2471)
| [   12.759559][  T253] Tainted: [W]=WARN
[   12.759560][  T253] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   12.759562][  T253] Call Trace:
[   12.759564][  T253]  <TASK>
[   12.759565][  T253]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   12.759571][  T253]  ? vprintk_emit (kernel/printk/printk.c:2471)
[   12.759574][  T253]  __might_resched.cold (kernel/sched/core.c:9234)
[   12.759578][  T253]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   12.759583][  T253]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   12.759588][  T253]  __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))
[   12.759590][  T253]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   12.759596][  T253]  ? 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)
[   12.759599][  T253]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   12.759602][  T253]  put_chars (drivers/char/virtio_console.c:1176)
[   12.759605][  T253]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   12.759610][  T253]  ? validate_chain (kernel/locking/lockdep.c:159 kernel/locking/lockdep.c:191 kernel/locking/lockdep.c:3928)
[   12.759613][  T253]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   12.759616][  T253]  ? mark_usage (kernel/locking/lockdep.c:4690)
[   12.759618][  T253]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.759619][  T253]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.759623][  T253]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   12.759625][  T253]  ? console_emit_next_record (kernel/printk/printk.c:3095 (discriminator 2) kernel/printk/printk.c:3182 (discriminator 2))
[   12.759629][  T253]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.759633][  T253]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   12.759637][  T253]  console_emit_next_record (kernel/printk/printk.c:3183)
[   12.759640][  T253]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   12.759642][  T253]  ? 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))
[   12.759645][  T253]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.759648][  T253]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   12.759652][  T253]  console_flush_one_record (kernel/printk/printk.c:3268)
[   12.759656][  T253]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   12.759658][  T253]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.759663][  T253]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   12.759666][  T253]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   12.759668][  T253]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.759671][  T253]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   12.759674][  T253]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   12.759676][  T253]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   12.759680][  T253]  vprintk_emit (kernel/printk/printk.c:2479)
[   12.759684][  T253]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   12.759686][  T253]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   12.759688][  T253]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:211 (discriminator 1) kernel/locking/spinlock.c:221 (discriminator 1))
[   12.759692][  T253]  ? mark_held_locks (kernel/locking/lockdep.c:4341)
[   12.759696][  T253]  _printk (kernel/printk/printk.c:2504)
[   12.759699][  T253]  ? snapshot_read.cold (user.c:?)
[   12.759703][  T253]  ? br_multicast_flood (??:?) bridge
[   12.759717][  T253]  ? do_setlink.isra.0 (net/core/rtnetlink.c:3273 (discriminator 1))
[   12.759718][  T253]  ? rtnl_newlink (net/core/rtnetlink.c:4215)
[   12.759720][  T253]  ? rtnetlink_rcv_msg (net/core/rtnetlink.c:7132)
[   12.759724][  T253] br_set_state (net/bridge/br_stp.c:57 (discriminator 2)) bridge
[   12.759734][  T253] br_init_port (net/bridge/br_stp_if.c:39) bridge
[   12.759743][  T253] new_nbp (net/bridge/br_if.c:449) bridge
[   12.759752][  T253] br_add_if (net/bridge/br_if.c:592) bridge
[   12.759760][  T253]  ? is_bpf_text_address (./include/linux/rcupdate.h:882 kernel/bpf/core.c:751)
[   12.759764][  T253]  ? kernel_text_address (kernel/extable.c:125 kernel/extable.c:94)
[   12.759767][  T253]  ? __kernel_text_address (kernel/extable.c:79)
[   12.759771][  T253]  do_set_master (net/core/rtnetlink.c:3071)
[   12.759775][  T253]  do_setlink.isra.0 (net/core/rtnetlink.c:3273 (discriminator 1))
[   12.759779][  T253]  ? stack_trace_save (kernel/stacktrace.c:122 (discriminator 1))
[   12.759782][  T253]  ? rtnl_link_get_size (net/core/rtnetlink.c:747)
[   12.759783][  T253]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:388 kernel/rcu/update.c:380)
[   12.759785][  T253]  ? stack_depot_save_flags (lib/stackdepot.c:609 (discriminator 2) lib/stackdepot.c:676 (discriminator 2))
[   12.759789][  T253]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   12.759792][  T253]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   12.759793][  T253]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   12.759796][  T253]  ? kasan_save_stack (mm/kasan/common.c:58)
[   12.759799][  T253]  ? kasan_save_stack (mm/kasan/common.c:57)
[   12.759801][  T253]  ? kasan_save_track (mm/kasan/common.c:78)
[   12.759804][  T253]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.759805][  T253]  ? netlink_seq_next (net/netlink/af_netlink.c:2685)
[   12.759808][  T253]  ? ___sys_sendmsg (net/socket.c:2757)
[   12.759813][  T253]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   12.759815][  T253]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   12.759818][  T253]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.759820][  T253]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   12.759822][  T253]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.759824][  T253]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.759826][  T253]  ? trace_contention_end (./include/trace/events/lock.h:121 (discriminator 22))
[   12.759830][  T253]  ? __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)
[   12.759831][  T253]  ? __mutex_lock (kernel/locking/mutex.c:656 (discriminator 1) kernel/locking/mutex.c:821 (discriminator 1))
[   12.759833][  T253]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   12.759837][  T253]  ? ww_mutex_lock (kernel/locking/mutex.c:934)
[   12.759839][  T253]  ? nla_get_range_signed (lib/nlattr.c:270)
[   12.759844][  T253]  ? __rtnl_newlink (net/core/rtnetlink.c:4063)
[   12.759849][  T253]  rtnl_newlink (net/core/rtnetlink.c:4215)
[   12.759854][  T253]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   12.759856][  T253]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.759861][  T253]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   12.759862][  T253]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   12.759864][  T253]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   12.759866][  T253]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   12.759870][  T253]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   12.759872][  T253]  rtnetlink_rcv_msg (net/core/rtnetlink.c:7132)
[   12.759875][  T253]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   12.759877][  T253]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.759881][  T253]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   12.759883][  T253]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   12.759886][  T253]  netlink_rcv_skb (net/netlink/af_netlink.c:2556)
[   12.759888][  T253]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   12.759891][  T253]  ? netlink_ack (./include/linux/skbuff.h:2718)
[   12.759897][  T253]  ? 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))
[   12.759899][  T253]  ? 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))
[   12.759903][  T253]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1345)
[   12.759907][  T253]  ? netlink_attachskb (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[   12.759910][  T253]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.759914][  T253]  netlink_sendmsg (net/netlink/af_netlink.c:1900)
[   12.759918][  T253]  ? netlink_unicast (./include/net/net_namespace.h:422 (discriminator 7))
[   12.759922][  T253]  ? __might_fault (mm/memory.c:7482 (discriminator 5))
[   12.759927][  T253]  ____sys_sendmsg (net/socket.c:800 (discriminator 4) net/socket.c:815 (discriminator 4) net/socket.c:2713 (discriminator 4))
[   12.759929][  T253]  ? copy_msghdr_from_user (net/socket.c:2650)
[   12.759932][  T253]  ? get_timestamp.constprop.0 (./include/linux/netdevice.h:5399)
[   12.759933][  T253]  ? move_addr_to_kernel (net/socket.c:258)
[   12.759941][  T253]  ___sys_sendmsg (net/socket.c:2767)
[   12.759943][  T253]  ? copy_msghdr_from_user (net/socket.c:2619)
[   12.759959][  T253]  __sys_sendmsg (net/socket.c:2799)
[   12.759962][  T253]  ? __sys_sendmsg_sock (net/socket.c:2780)
[   12.759969][  T253]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.759975][  T253]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   12.759978][  T253]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   12.759981][  T253]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   12.759984][  T253] RIP: 0033:0x7f1db3c2b54e
[   12.759987][  T253] 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
[   12.759989][  T253] RSP: 002b:00007ffebecdff30 EFLAGS: 00000202 ORIG_RAX: 000000000000002e
[   12.759992][  T253] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f1db3c2b54e
[   12.759993][  T253] RDX: 0000000000000000 RSI: 00007ffebecdffe0 RDI: 0000000000000005
[   12.759994][  T253] RBP: 00007ffebecdff40 R08: 0000000000000000 R09: 0000000000000000
[   12.759995][  T253] R10: 0000000000000000 R11: 0000000000000202 R12: 000000006a910f2b
[   12.759996][  T253] R13: 00000000004a1620 R14: 0000000000000000 R15: 00007ffebece06a0
| [   27.719758][  T396] softirqs last disabled at (22888): br_device_event (./include/linux/spinlock.h:353 net/bridge/br.c:109) bridge
| [   27.719771][  T396] Preemption disabled at:
| [   27.719773][  T396] 0x0
| [   27.719786][  T396] Tainted: [W]=WARN
[   27.719787][  T396] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   27.719790][  T396] Call Trace:
[   27.719792][  T396]  <TASK>
[   27.719794][  T396]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   27.719803][  T396]  __might_resched.cold (kernel/sched/core.c:9234)
[   27.719809][  T396]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   27.719815][  T396]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   27.719822][  T396]  __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))
[   27.719826][  T396]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   27.719835][  T396]  ? 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)
[   27.719839][  T396]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   27.719844][  T396]  put_chars (drivers/char/virtio_console.c:1176)
[   27.719848][  T396]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   27.719851][  T396]  ? check_prev_add (kernel/locking/lockdep.c:3185)
[   27.719858][  T396]  ? validate_chain (kernel/locking/lockdep.c:159 kernel/locking/lockdep.c:191 kernel/locking/lockdep.c:3928)
[   27.719865][  T396]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   27.719868][  T396]  ? mark_usage (kernel/locking/lockdep.c:4690)
[   27.719871][  T396]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   27.719874][  T396]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   27.719881][  T396]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   27.719883][  T396]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   27.719891][  T396]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   27.719898][  T396]  console_emit_next_record (kernel/printk/printk.c:3183)
[   27.719905][  T396]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   27.719907][  T396]  ? 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))
[   27.719913][  T396]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   27.719918][  T396]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   27.719925][  T396]  console_flush_one_record (kernel/printk/printk.c:3268)
[   27.719932][  T396]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   27.719935][  T396]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   27.719945][  T396]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   27.719949][  T396]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   27.719952][  T396]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   27.719956][  T396]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   27.719962][  T396]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   27.719965][  T396]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   27.719971][  T396]  vprintk_emit (kernel/printk/printk.c:2479)
[   27.719983][  T396]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   27.719986][  T396]  ? mark_held_locks (kernel/locking/lockdep.c:4341)
[   27.719990][  T396]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   27.719994][  T396]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   27.720001][  T396]  _printk (kernel/printk/printk.c:2504)
[   27.720007][  T396]  ? snapshot_read.cold (user.c:?)
[   27.720021][  T396] br_set_state (net/bridge/br_stp.c:57 (discriminator 2)) bridge
[   27.720041][  T396] br_stp_disable_port (net/bridge/br_stp_if.c:106) bridge
[   27.720058][  T396] br_device_event (net/bridge/br.c:111) bridge
[   27.720071][  T396]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:211 (discriminator 1) kernel/locking/spinlock.c:221 (discriminator 1))
[   27.720077][  T396]  ? _sub_I_65535_1+0x4d0/0x4d0 stp
[   27.720088][  T396]  notifier_call_chain (kernel/notifier.c:85)
[   27.720098][  T396]  __dev_notify_flags (net/core/dev.c:2313 net/core/dev.c:2327 net/core/dev.c:9855)
[   27.720105][  T396]  ? netif_change_name (net/core/dev.c:1517)
[   27.720112][  T396]  ? netif_set_allmulti (./include/net/netdev_lock.h:30 (discriminator 1))
[   27.720117][  T396]  ? __kernel_text_address (kernel/extable.c:79)
[   27.720120][  T396]  ? write_profile (profile.c:?)
[   27.720124][  T396]  ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:385 arch/x86/kernel/unwind_orc.c:380)
[   27.720132][  T396]  netif_change_flags (net/core/dev.c:9882)
[   27.720138][  T396]  do_setlink.isra.0 (net/core/rtnetlink.c:3266 (discriminator 1))
[   27.720144][  T396]  ? stack_trace_save (kernel/stacktrace.c:122 (discriminator 1))
[   27.720148][  T396]  ? rtnl_link_get_size (net/core/rtnetlink.c:747)
[   27.720150][  T396]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:388 kernel/rcu/update.c:380)
[   27.720153][  T396]  ? stack_depot_save_flags (lib/stackdepot.c:609 (discriminator 2) lib/stackdepot.c:676 (discriminator 2))
[   27.720158][  T396]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   27.720162][  T396]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   27.720164][  T396]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   27.720169][  T396]  ? kasan_save_stack (mm/kasan/common.c:58)
[   27.720173][  T396]  ? kasan_save_stack (mm/kasan/common.c:57)
[   27.720176][  T396]  ? kasan_save_track (mm/kasan/common.c:78)
[   27.720180][  T396]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   27.720188][  T396]  ? netlink_seq_next (net/netlink/af_netlink.c:2685)
[   27.720192][  T396]  ? ___sys_sendmsg (net/socket.c:2757)
[   27.720199][  T396]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   27.720202][  T396]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   27.720207][  T396]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   27.720211][  T396]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   27.720213][  T396]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   27.720216][  T396]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   27.720219][  T396]  ? trace_contention_end (./include/trace/events/lock.h:121 (discriminator 22))
[   27.720225][  T396]  ? __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)
[   27.720227][  T396]  ? __mutex_lock (kernel/locking/mutex.c:656 (discriminator 1) kernel/locking/mutex.c:821 (discriminator 1))
[   27.720231][  T396]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   27.720237][  T396]  ? ww_mutex_lock (kernel/locking/mutex.c:934)
[   27.720247][  T396]  ? __rtnl_newlink (net/core/rtnetlink.c:4063)
[   27.720257][  T396]  rtnl_newlink (net/core/rtnetlink.c:4215)
[   27.720267][  T396]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   27.720270][  T396]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   27.720278][  T396]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   27.720281][  T396]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   27.720284][  T396]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   27.720287][  T396]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   27.720294][  T396]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   27.720298][  T396]  rtnetlink_rcv_msg (net/core/rtnetlink.c:7132)
[   27.720304][  T396]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   27.720306][  T396]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   27.720314][  T396]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   27.720317][  T396]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   27.720323][  T396]  netlink_rcv_skb (net/netlink/af_netlink.c:2556)
[   27.720326][  T396]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   27.720331][  T396]  ? netlink_ack (./include/linux/skbuff.h:2718)
[   27.720343][  T396]  ? 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))
[   27.720345][  T396]  ? 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))
[   27.720353][  T396]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1345)
[   27.720360][  T396]  ? netlink_attachskb (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[   27.720364][  T396]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   27.720372][  T396]  netlink_sendmsg (net/netlink/af_netlink.c:1900)
[   27.720379][  T396]  ? netlink_unicast (./include/net/net_namespace.h:422 (discriminator 7))
[   27.720386][  T396]  ? __might_fault (mm/memory.c:7482 (discriminator 5))
[   27.720394][  T396]  ____sys_sendmsg (net/socket.c:800 (discriminator 4) net/socket.c:815 (discriminator 4) net/socket.c:2713 (discriminator 4))
[   27.720398][  T396]  ? copy_msghdr_from_user (net/socket.c:2650)
[   27.720402][  T396]  ? get_timestamp.constprop.0 (./include/linux/netdevice.h:5399)
[   27.720405][  T396]  ? move_addr_to_kernel (net/socket.c:258)
[   27.720419][  T396]  ___sys_sendmsg (net/socket.c:2767)
[   27.720423][  T396]  ? copy_msghdr_from_user (net/socket.c:2619)
[   27.720455][  T396]  __sys_sendmsg (net/socket.c:2799)
[   27.720459][  T396]  ? __sys_sendmsg_sock (net/socket.c:2780)
[   27.720471][  T396]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   27.720477][  T396]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   27.720481][  T396]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   27.720486][  T396]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   27.720489][  T396] RIP: 0033:0x7fac0175954e
[   27.720493][  T396] 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
[   27.720496][  T396] RSP: 002b:00007ffe5ae290d0 EFLAGS: 00000202 ORIG_RAX: 000000000000002e
[   27.720500][  T396] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fac0175954e
[   27.720502][  T396] RDX: 0000000000000000 RSI: 00007ffe5ae29180 RDI: 0000000000000005
[   27.720504][  T396] RBP: 00007ffe5ae290e0 R08: 0000000000000000 R09: 0000000000000000
[   27.720505][  T396] R10: 0000000000000000 R11: 0000000000000202 R12: 000000006a910f3a


Finger prints:
br_device_event:dump_stack_lvl:__kmalloc_noprof:put_chars:hvc_console_print
__alloc_skb:vprintk_emit:dump_stack_lvl:__kmalloc_noprof:put_chars
netlink_release:dump_stack_lvl:__kmalloc_noprof:put_chars:hvc_console_print