======================================
| [   10.795464][  T199] softirqs last disabled at (31871): __irq_exit_rcu (kernel/softirq.c:679 kernel/softirq.c:519 kernel/softirq.c:767)
| [   10.795466][  T199] Preemption disabled at:
| [   10.795467][  T199] 0x0
| [   10.795477][  T199] Tainted: [W]=WARN
[   10.795478][  T199] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   10.795480][  T199] Call Trace:
[   10.795482][  T199]  <TASK>
[   10.795483][  T199]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   10.795490][  T199]  __might_resched.cold (kernel/sched/core.c:9234)
[   10.795494][  T199]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   10.795499][  T199]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   10.795504][  T199]  __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))
[   10.795507][  T199]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   10.795513][  T199]  ? 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)
[   10.795516][  T199]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   10.795519][  T199]  put_chars (drivers/char/virtio_console.c:1176)
[   10.795522][  T199]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   10.795524][  T199]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   10.795529][  T199]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   10.795535][  T199]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   10.795541][  T199]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   10.795544][  T199]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   10.795546][  T199]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   10.795556][  T199]  console_emit_next_record (kernel/printk/printk.c:3183)
[   10.795560][  T199]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   10.795562][  T199]  ? 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))
[   10.795566][  T199]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   10.795568][  T199]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   10.795572][  T199]  console_flush_one_record (kernel/printk/printk.c:3268)
[   10.795577][  T199]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   10.795579][  T199]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   10.795585][  T199]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   10.795588][  T199]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   10.795590][  T199]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   10.795593][  T199]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   10.795597][  T199]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   10.795599][  T199]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   10.795602][  T199]  vprintk_emit (kernel/printk/printk.c:2479)
[   10.795606][  T199]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   10.795610][  T199]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   10.795614][  T199]  _printk (kernel/printk/printk.c:2504)
[   10.795618][  T199]  ? snapshot_read.cold (user.c:?)
[   10.795621][  T199]  ? 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)
[   10.795624][  T199]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[   10.795628][  T199]  ? 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)
[   10.795631][  T199]  do_exit.cold (kernel/exit.c:889 (discriminator 4) kernel/exit.c:1043 (discriminator 4))
[   10.795635][  T199]  ? exit_notify (kernel/exit.c:780)
[   10.795637][  T199]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   10.795640][  T199]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   10.795645][  T199]  do_group_exit (kernel/exit.c:1151)
[   10.795648][  T199]  __x64_sys_exit_group (kernel/exit.c:1162 kernel/exit.c:1160 kernel/exit.c:1160)
[   10.795650][  T199]  x64_sys_call (./arch/x86/include/generated/asm/syscalls_64.h:232)
[   10.795652][  T199]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   10.795655][  T199]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   10.795659][  T199]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   10.795661][  T199] RIP: 0033:0x7f5d76b281b8
[   10.795663][  T199] Code: Unable to access opcode bytes at 0x7f5d76b2818e.

Code starting with the faulting instruction
===========================================
[   10.795664][  T199] RSP: 002b:00007ffc4c871bb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   10.795667][  T199] RAX: ffffffffffffffda RBX: 00007f5d76c58f88 RCX: 00007f5d76b281b8
[   10.795668][  T199] RDX: 00007f5d76872fc8 RSI: fffffffffffffeb8 RDI: 0000000000000000
[   10.795669][  T199] RBP: 00007ffc4c871c10 R08: 0000000000000000 R09: 0000000000008010
[   10.795670][  T199] R10: 00007ffc4c8719d0 R11: 0000000000000246 R12: 0000000000000001
[   10.795671][  T199] R13: 0000000000000000 R14: 00007f5d76c57680 R15: 00007f5d76c58fa0
| [   12.310693][  T252] softirqs last disabled at (14521): __irq_exit_rcu (kernel/softirq.c:679 kernel/softirq.c:519 kernel/softirq.c:767)
| [   12.310696][  T252] Preemption disabled at:
| [   12.310697][  T252] vprintk_emit (kernel/printk/printk.c:2471)
| [   12.310709][  T252] Tainted: [W]=WARN
[   12.310711][  T252] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   12.310713][  T252] Call Trace:
[   12.310715][  T252]  <TASK>
[   12.310717][  T252]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   12.310725][  T252]  ? vprintk_emit (kernel/printk/printk.c:2471)
[   12.310728][  T252]  __might_resched.cold (kernel/sched/core.c:9234)
[   12.310734][  T252]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   12.310739][  T252]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   12.310747][  T252]  __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))
[   12.310750][  T252]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   12.310759][  T252]  ? 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)
[   12.310763][  T252]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   12.310768][  T252]  put_chars (drivers/char/virtio_console.c:1176)
[   12.310772][  T252]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   12.310780][  T252]  ? validate_chain (kernel/locking/lockdep.c:159 kernel/locking/lockdep.c:191 kernel/locking/lockdep.c:3928)
[   12.310786][  T252]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   12.310790][  T252]  ? mark_usage (kernel/locking/lockdep.c:4690)
[   12.310793][  T252]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.310795][  T252]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.310802][  T252]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   12.310805][  T252]  ? console_emit_next_record (kernel/printk/printk.c:3095 (discriminator 2) kernel/printk/printk.c:3182 (discriminator 2))
[   12.310810][  T252]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.310815][  T252]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   12.310822][  T252]  console_emit_next_record (kernel/printk/printk.c:3183)
[   12.310828][  T252]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   12.310830][  T252]  ? 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))
[   12.310835][  T252]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.310839][  T252]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   12.310845][  T252]  console_flush_one_record (kernel/printk/printk.c:3268)
[   12.310852][  T252]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   12.310855][  T252]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.310864][  T252]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   12.310868][  T252]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   12.310871][  T252]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.310874][  T252]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   12.310880][  T252]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   12.310882][  T252]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   12.310888][  T252]  vprintk_emit (kernel/printk/printk.c:2479)
[   12.310894][  T252]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   12.310898][  T252]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   12.310900][  T252]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:211 (discriminator 1) kernel/locking/spinlock.c:221 (discriminator 1))
[   12.310905][  T252]  ? mark_held_locks (kernel/locking/lockdep.c:4341)
[   12.310911][  T252]  _printk (kernel/printk/printk.c:2504)
[   12.310916][  T252]  ? snapshot_read.cold (user.c:?)
[   12.310922][  T252]  ? br_multicast_flood (??:?) bridge
[   12.310940][  T252]  ? do_setlink.isra.0 (net/core/rtnetlink.c:3273 (discriminator 1))
[   12.310943][  T252]  ? rtnl_newlink (net/core/rtnetlink.c:4215)
[   12.310945][  T252]  ? rtnetlink_rcv_msg (net/core/rtnetlink.c:7132)
[   12.310952][  T252] br_set_state (net/bridge/br_stp.c:57 (discriminator 2)) bridge
[   12.310969][  T252] br_init_port (net/bridge/br_stp_if.c:39) bridge
[   12.310983][  T252] new_nbp (net/bridge/br_if.c:449) bridge
[   12.311002][  T252] br_add_if (net/bridge/br_if.c:592) bridge
[   12.311014][  T252]  ? is_bpf_text_address (./include/linux/rcupdate.h:882 kernel/bpf/core.c:751)
[   12.311019][  T252]  ? kernel_text_address (kernel/extable.c:125 kernel/extable.c:94)
[   12.311023][  T252]  ? __kernel_text_address (kernel/extable.c:79)
[   12.311030][  T252]  do_set_master (net/core/rtnetlink.c:3071)
[   12.311038][  T252]  do_setlink.isra.0 (net/core/rtnetlink.c:3273 (discriminator 1))
[   12.311043][  T252]  ? stack_trace_save (kernel/stacktrace.c:122 (discriminator 1))
[   12.311047][  T252]  ? rtnl_link_get_size (net/core/rtnetlink.c:747)
[   12.311050][  T252]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:388 kernel/rcu/update.c:380)
[   12.311053][  T252]  ? stack_depot_save_flags (lib/stackdepot.c:609 (discriminator 2) lib/stackdepot.c:676 (discriminator 2))
[   12.311058][  T252]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   12.311062][  T252]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   12.311065][  T252]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   12.311069][  T252]  ? kasan_save_stack (mm/kasan/common.c:58)
[   12.311073][  T252]  ? kasan_save_stack (mm/kasan/common.c:57)
[   12.311075][  T252]  ? kasan_save_track (mm/kasan/common.c:78)
[   12.311080][  T252]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.311082][  T252]  ? netlink_seq_next (net/netlink/af_netlink.c:2685)
[   12.311086][  T252]  ? ___sys_sendmsg (net/socket.c:2757)
[   12.311094][  T252]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   12.311097][  T252]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   12.311101][  T252]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.311105][  T252]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   12.311107][  T252]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.311110][  T252]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.311113][  T252]  ? trace_contention_end (./include/trace/events/lock.h:121 (discriminator 22))
[   12.311119][  T252]  ? __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)
[   12.311121][  T252]  ? __mutex_lock (kernel/locking/mutex.c:656 (discriminator 1) kernel/locking/mutex.c:821 (discriminator 1))
[   12.311125][  T252]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   12.311131][  T252]  ? ww_mutex_lock (kernel/locking/mutex.c:934)
[   12.311133][  T252]  ? nla_get_range_signed (lib/nlattr.c:270)
[   12.311142][  T252]  ? __rtnl_newlink (net/core/rtnetlink.c:4063)
[   12.311151][  T252]  rtnl_newlink (net/core/rtnetlink.c:4215)
[   12.311161][  T252]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   12.311164][  T252]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.311172][  T252]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   12.311175][  T252]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   12.311178][  T252]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   12.311181][  T252]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   12.311188][  T252]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   12.311191][  T252]  rtnetlink_rcv_msg (net/core/rtnetlink.c:7132)
[   12.311197][  T252]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   12.311199][  T252]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.311207][  T252]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   12.311210][  T252]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   12.311216][  T252]  netlink_rcv_skb (net/netlink/af_netlink.c:2556)
[   12.311219][  T252]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   12.311224][  T252]  ? netlink_ack (./include/linux/skbuff.h:2718)
[   12.311235][  T252]  ? 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))
[   12.311237][  T252]  ? 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))
[   12.311245][  T252]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1345)
[   12.311251][  T252]  ? netlink_attachskb (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[   12.311255][  T252]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.311262][  T252]  netlink_sendmsg (net/netlink/af_netlink.c:1900)
[   12.311269][  T252]  ? netlink_unicast (./include/net/net_namespace.h:422 (discriminator 7))
[   12.311276][  T252]  ? __might_fault (mm/memory.c:7482 (discriminator 5))
[   12.311284][  T252]  ____sys_sendmsg (net/socket.c:800 (discriminator 4) net/socket.c:815 (discriminator 4) net/socket.c:2713 (discriminator 4))
[   12.311288][  T252]  ? copy_msghdr_from_user (net/socket.c:2650)
[   12.311291][  T252]  ? get_timestamp.constprop.0 (./include/linux/netdevice.h:5399)
[   12.311294][  T252]  ? move_addr_to_kernel (net/socket.c:258)
[   12.311307][  T252]  ___sys_sendmsg (net/socket.c:2767)
[   12.311311][  T252]  ? copy_msghdr_from_user (net/socket.c:2619)
[   12.311341][  T252]  __sys_sendmsg (net/socket.c:2799)
[   12.311345][  T252]  ? __sys_sendmsg_sock (net/socket.c:2780)
[   12.311356][  T252]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.311362][  T252]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   12.311365][  T252]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   12.311370][  T252]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   12.311374][  T252] RIP: 0033:0x7fedae3db54e
[   12.311378][  T252] 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
[   12.311381][  T252] RSP: 002b:00007fff5440d3a0 EFLAGS: 00000202 ORIG_RAX: 000000000000002e
[   12.311386][  T252] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fedae3db54e
[   12.311388][  T252] RDX: 0000000000000000 RSI: 00007fff5440d450 RDI: 0000000000000005
[   12.311389][  T252] RBP: 00007fff5440d3b0 R08: 0000000000000000 R09: 0000000000000000
[   12.311391][  T252] R10: 0000000000000000 R11: 0000000000000202 R12: 000000006a915936
[   12.311392][  T252] R13: 00000000004a1620 R14: 0000000000000000 R15: 00007fff5440db10
| [   27.037165][  T396] softirqs last disabled at (18252): br_device_event (./include/linux/spinlock.h:353 net/bridge/br.c:109) bridge
| [   27.037173][  T396] Preemption disabled at:
| [   27.037173][  T396] 0x0
| [   27.037184][  T396] Tainted: [W]=WARN
[   27.037184][  T396] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   27.037186][  T396] Call Trace:
[   27.037188][  T396]  <TASK>
[   27.037189][  T396]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   27.037196][  T396]  __might_resched.cold (kernel/sched/core.c:9234)
[   27.037200][  T396]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   27.037205][  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)
[   27.037210][  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))
[   27.037212][  T396]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   27.037218][  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)
[   27.037220][  T396]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   27.037224][  T396]  put_chars (drivers/char/virtio_console.c:1176)
[   27.037227][  T396]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   27.037228][  T396]  ? check_prev_add (kernel/locking/lockdep.c:3185)
[   27.037232][  T396]  ? validate_chain (kernel/locking/lockdep.c:159 kernel/locking/lockdep.c:191 kernel/locking/lockdep.c:3928)
[   27.037236][  T396]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   27.037239][  T396]  ? mark_usage (kernel/locking/lockdep.c:4690)
[   27.037240][  T396]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   27.037242][  T396]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   27.037246][  T396]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   27.037248][  T396]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   27.037252][  T396]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   27.037256][  T396]  console_emit_next_record (kernel/printk/printk.c:3183)
[   27.037260][  T396]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   27.037262][  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))
[   27.037265][  T396]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   27.037269][  T396]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   27.037273][  T396]  console_flush_one_record (kernel/printk/printk.c:3268)
[   27.037277][  T396]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   27.037279][  T396]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   27.037281][  T396]  ? insn_get_immediate.part.0 (./arch/x86/include/asm/insn.h:30 arch/x86/lib/insn.c:570 arch/x86/lib/insn.c:678)
[   27.037287][  T396]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   27.037290][  T396]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   27.037292][  T396]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   27.037294][  T396]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   27.037298][  T396]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   27.037300][  T396]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   27.037303][  T396]  vprintk_emit (kernel/printk/printk.c:2479)
[   27.037308][  T396]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   27.037310][  T396]  ? mark_held_locks (kernel/locking/lockdep.c:4341)
[   27.037312][  T396]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   27.037315][  T396]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   27.037319][  T396]  _printk (kernel/printk/printk.c:2504)
[   27.037323][  T396]  ? snapshot_read.cold (user.c:?)
[   27.037330][  T396] br_set_state (net/bridge/br_stp.c:57 (discriminator 2)) bridge
[   27.037341][  T396] br_stp_disable_port (net/bridge/br_stp_if.c:106) bridge
[   27.037351][  T396] br_device_event (net/bridge/br.c:111) bridge
[   27.037359][  T396]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:211 (discriminator 1) kernel/locking/spinlock.c:221 (discriminator 1))
[   27.037362][  T396]  ? _sub_I_65535_1+0x4d0/0x4d0 stp
[   27.037368][  T396]  notifier_call_chain (kernel/notifier.c:85)
[   27.037374][  T396]  __dev_notify_flags (net/core/dev.c:2313 net/core/dev.c:2327 net/core/dev.c:9855)
[   27.037379][  T396]  ? netif_change_name (net/core/dev.c:1517)
[   27.037383][  T396]  ? netif_set_allmulti (./include/net/netdev_lock.h:30 (discriminator 1))
[   27.037386][  T396]  ? __kernel_text_address (kernel/extable.c:79)
[   27.037388][  T396]  ? write_profile (profile.c:?)
[   27.037391][  T396]  ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:385 arch/x86/kernel/unwind_orc.c:380)
[   27.037396][  T396]  netif_change_flags (net/core/dev.c:9882)
[   27.037400][  T396]  do_setlink.isra.0 (net/core/rtnetlink.c:3266 (discriminator 1))
[   27.037404][  T396]  ? stack_trace_save (kernel/stacktrace.c:122 (discriminator 1))
[   27.037406][  T396]  ? rtnl_link_get_size (net/core/rtnetlink.c:747)
[   27.037408][  T396]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:388 kernel/rcu/update.c:380)
[   27.037409][  T396]  ? stack_depot_save_flags (lib/stackdepot.c:609 (discriminator 2) lib/stackdepot.c:676 (discriminator 2))
[   27.037413][  T396]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   27.037416][  T396]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   27.037417][  T396]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   27.037420][  T396]  ? kasan_save_stack (mm/kasan/common.c:58)
[   27.037423][  T396]  ? kasan_save_stack (mm/kasan/common.c:57)
[   27.037425][  T396]  ? kasan_save_track (mm/kasan/common.c:78)
[   27.037427][  T396]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   27.037429][  T396]  ? netlink_seq_next (net/netlink/af_netlink.c:2685)
[   27.037432][  T396]  ? ___sys_sendmsg (net/socket.c:2757)
[   27.037437][  T396]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   27.037439][  T396]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   27.037441][  T396]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   27.037444][  T396]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   27.037445][  T396]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   27.037447][  T396]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   27.037450][  T396]  ? trace_contention_end (./include/trace/events/lock.h:121 (discriminator 22))
[   27.037453][  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)
[   27.037455][  T396]  ? __mutex_lock (kernel/locking/mutex.c:656 (discriminator 1) kernel/locking/mutex.c:821 (discriminator 1))
[   27.037457][  T396]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   27.037461][  T396]  ? ww_mutex_lock (kernel/locking/mutex.c:934)
[   27.037466][  T396]  ? __rtnl_newlink (net/core/rtnetlink.c:4063)
[   27.037471][  T396]  rtnl_newlink (net/core/rtnetlink.c:4215)
[   27.037477][  T396]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   27.037479][  T396]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   27.037483][  T396]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   27.037485][  T396]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   27.037487][  T396]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   27.037489][  T396]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   27.037493][  T396]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   27.037495][  T396]  rtnetlink_rcv_msg (net/core/rtnetlink.c:7132)
[   27.037498][  T396]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   27.037499][  T396]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   27.037504][  T396]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   27.037506][  T396]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   27.037509][  T396]  netlink_rcv_skb (net/netlink/af_netlink.c:2556)
[   27.037511][  T396]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   27.037514][  T396]  ? netlink_ack (./include/linux/skbuff.h:2718)
[   27.037521][  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))
[   27.037522][  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))
[   27.037526][  T396]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1345)
[   27.037530][  T396]  ? netlink_attachskb (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[   27.037533][  T396]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   27.037537][  T396]  netlink_sendmsg (net/netlink/af_netlink.c:1900)
[   27.037541][  T396]  ? netlink_unicast (./include/net/net_namespace.h:422 (discriminator 7))
[   27.037545][  T396]  ? __might_fault (mm/memory.c:7482 (discriminator 5))
[   27.037551][  T396]  ____sys_sendmsg (net/socket.c:800 (discriminator 4) net/socket.c:815 (discriminator 4) net/socket.c:2713 (discriminator 4))
[   27.037553][  T396]  ? copy_msghdr_from_user (net/socket.c:2650)
[   27.037555][  T396]  ? get_timestamp.constprop.0 (./include/linux/netdevice.h:5399)
[   27.037557][  T396]  ? move_addr_to_kernel (net/socket.c:258)
[   27.037565][  T396]  ___sys_sendmsg (net/socket.c:2767)
[   27.037567][  T396]  ? copy_msghdr_from_user (net/socket.c:2619)
[   27.037583][  T396]  __sys_sendmsg (net/socket.c:2799)
[   27.037586][  T396]  ? __sys_sendmsg_sock (net/socket.c:2780)
[   27.037593][  T396]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   27.037596][  T396]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   27.037598][  T396]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   27.037601][  T396]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   27.037603][  T396] RIP: 0033:0x7fef1314754e
[   27.037605][  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
[   27.037607][  T396] RSP: 002b:00007fff546288d0 EFLAGS: 00000202 ORIG_RAX: 000000000000002e
[   27.037610][  T396] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fef1314754e
[   27.037611][  T396] RDX: 0000000000000000 RSI: 00007fff54628980 RDI: 0000000000000005
[   27.037612][  T396] RBP: 00007fff546288e0 R08: 0000000000000000 R09: 0000000000000000
[   27.037613][  T396] R10: 0000000000000000 R11: 0000000000000202 R12: 000000006a915945


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