======================================
| [   10.913557][  T186] softirqs last disabled at (43261): __irq_exit_rcu (kernel/softirq.c:679 kernel/softirq.c:519 kernel/softirq.c:767)
| [   10.913559][  T186] Preemption disabled at:
| [   10.913560][  T186] 0x0
| [   10.913571][  T186] Tainted: [W]=WARN
[   10.913572][  T186] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   10.913575][  T186] Call Trace:
[   10.913576][  T186]  <TASK>
[   10.913578][  T186]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   10.913585][  T186]  __might_resched.cold (kernel/sched/core.c:9234)
[   10.913589][  T186]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   10.913594][  T186]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   10.913599][  T186]  __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))
[   10.913602][  T186]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   10.913608][  T186]  ? 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)
[   10.913611][  T186]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   10.913615][  T186]  put_chars (drivers/char/virtio_console.c:1176)
[   10.913618][  T186]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   10.913619][  T186]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   10.913625][  T186]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   10.913631][  T186]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   10.913638][  T186]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   10.913640][  T186]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   10.913642][  T186]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   10.913647][  T186]  console_emit_next_record (kernel/printk/printk.c:3183)
[   10.913651][  T186]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   10.913652][  T186]  ? 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))
[   10.913656][  T186]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   10.913658][  T186]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   10.913662][  T186]  console_flush_one_record (kernel/printk/printk.c:3268)
[   10.913666][  T186]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   10.913668][  T186]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   10.913674][  T186]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   10.913677][  T186]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   10.913678][  T186]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   10.913681][  T186]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   10.913685][  T186]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   10.913687][  T186]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   10.913691][  T186]  vprintk_emit (kernel/printk/printk.c:2479)
[   10.913695][  T186]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   10.913698][  T186]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   10.913702][  T186]  _printk (kernel/printk/printk.c:2504)
[   10.913706][  T186]  ? snapshot_read.cold (user.c:?)
[   10.913709][  T186]  ? 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)
[   10.913711][  T186]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[   10.913716][  T186]  ? 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)
[   10.913719][  T186]  do_exit.cold (kernel/exit.c:889 (discriminator 4) kernel/exit.c:1043 (discriminator 4))
[   10.913723][  T186]  ? exit_notify (kernel/exit.c:780)
[   10.913725][  T186]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   10.913728][  T186]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   10.913732][  T186]  do_group_exit (kernel/exit.c:1151)
[   10.913735][  T186]  __x64_sys_exit_group (kernel/exit.c:1162 kernel/exit.c:1160 kernel/exit.c:1160)
[   10.913737][  T186]  x64_sys_call (./arch/x86/include/generated/asm/syscalls_64.h:232)
[   10.913739][  T186]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   10.913742][  T186]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   10.913745][  T186]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   10.913748][  T186] RIP: 0033:0x7f278c6751b8
[   10.913750][  T186] Code: Unable to access opcode bytes at 0x7f278c67518e.

Code starting with the faulting instruction
===========================================
[   10.913751][  T186] RSP: 002b:00007fffd92bd138 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   10.913754][  T186] RAX: ffffffffffffffda RBX: 00007f278c7a5f88 RCX: 00007f278c6751b8
[   10.913755][  T186] RDX: 00007f278c3bffc8 RSI: fffffffffffffeb8 RDI: 0000000000000000
[   10.913756][  T186] RBP: 00007fffd92bd190 R08: 0000000000000000 R09: 0000000000008010
[   10.913757][  T186] R10: 00007fffd92bcf50 R11: 0000000000000246 R12: 0000000000000001
[   10.913758][  T186] R13: 0000000000000000 R14: 00007f278c7a4680 R15: 00007f278c7a5fa0
| [   12.699444][  T253] softirqs last disabled at (15558): __alloc_skb (./include/linux/bottom_half.h:20 (discriminator 2) net/core/skbuff.c:697 (discriminator 2))
| [   12.699447][  T253] Preemption disabled at:
| [   12.699448][  T253] vprintk_emit (kernel/printk/printk.c:2471)
| [   12.699464][  T253] Tainted: [W]=WARN
[   12.699465][  T253] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   12.699468][  T253] Call Trace:
[   12.699470][  T253]  <TASK>
[   12.699472][  T253]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   12.699479][  T253]  ? vprintk_emit (kernel/printk/printk.c:2471)
[   12.699482][  T253]  __might_resched.cold (kernel/sched/core.c:9234)
[   12.699488][  T253]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   12.699494][  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)
[   12.699501][  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))
[   12.699505][  T253]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   12.699513][  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)
[   12.699516][  T253]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   12.699521][  T253]  put_chars (drivers/char/virtio_console.c:1176)
[   12.699526][  T253]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   12.699533][  T253]  ? validate_chain (kernel/locking/lockdep.c:159 kernel/locking/lockdep.c:191 kernel/locking/lockdep.c:3928)
[   12.699539][  T253]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   12.699543][  T253]  ? mark_usage (kernel/locking/lockdep.c:4690)
[   12.699545][  T253]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.699548][  T253]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.699555][  T253]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   12.699558][  T253]  ? console_emit_next_record (kernel/printk/printk.c:3095 (discriminator 2) kernel/printk/printk.c:3182 (discriminator 2))
[   12.699563][  T253]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.699568][  T253]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   12.699575][  T253]  console_emit_next_record (kernel/printk/printk.c:3183)
[   12.699581][  T253]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   12.699583][  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))
[   12.699588][  T253]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.699592][  T253]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   12.699598][  T253]  console_flush_one_record (kernel/printk/printk.c:3268)
[   12.699605][  T253]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   12.699607][  T253]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.699617][  T253]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   12.699621][  T253]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   12.699623][  T253]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.699627][  T253]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   12.699633][  T253]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   12.699635][  T253]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   12.699641][  T253]  vprintk_emit (kernel/printk/printk.c:2479)
[   12.699647][  T253]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   12.699650][  T253]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   12.699653][  T253]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:211 (discriminator 1) kernel/locking/spinlock.c:221 (discriminator 1))
[   12.699659][  T253]  ? mark_held_locks (kernel/locking/lockdep.c:4341)
[   12.699665][  T253]  _printk (kernel/printk/printk.c:2504)
[   12.699669][  T253]  ? snapshot_read.cold (user.c:?)
[   12.699676][  T253]  ? br_multicast_flood (??:?) bridge
[   12.699694][  T253]  ? do_setlink.isra.0 (net/core/rtnetlink.c:3273 (discriminator 1))
[   12.699696][  T253]  ? rtnl_newlink (net/core/rtnetlink.c:4215)
[   12.699698][  T253]  ? rtnetlink_rcv_msg (net/core/rtnetlink.c:7132)
[   12.699705][  T253] br_set_state (net/bridge/br_stp.c:57 (discriminator 2)) bridge
[   12.699722][  T253] br_init_port (net/bridge/br_stp_if.c:39) bridge
[   12.699736][  T253] new_nbp (net/bridge/br_if.c:449) bridge
[   12.699752][  T253] br_add_if (net/bridge/br_if.c:592) bridge
[   12.699764][  T253]  ? is_bpf_text_address (./include/linux/rcupdate.h:882 kernel/bpf/core.c:751)
[   12.699769][  T253]  ? kernel_text_address (kernel/extable.c:125 kernel/extable.c:94)
[   12.699774][  T253]  ? __kernel_text_address (kernel/extable.c:79)
[   12.699780][  T253]  do_set_master (net/core/rtnetlink.c:3071)
[   12.699787][  T253]  do_setlink.isra.0 (net/core/rtnetlink.c:3273 (discriminator 1))
[   12.699793][  T253]  ? stack_trace_save (kernel/stacktrace.c:122 (discriminator 1))
[   12.699797][  T253]  ? rtnl_link_get_size (net/core/rtnetlink.c:747)
[   12.699799][  T253]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:388 kernel/rcu/update.c:380)
[   12.699802][  T253]  ? stack_depot_save_flags (lib/stackdepot.c:609 (discriminator 2) lib/stackdepot.c:676 (discriminator 2))
[   12.699807][  T253]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   12.699811][  T253]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   12.699814][  T253]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   12.699818][  T253]  ? kasan_save_stack (mm/kasan/common.c:58)
[   12.699822][  T253]  ? kasan_save_stack (mm/kasan/common.c:57)
[   12.699824][  T253]  ? kasan_save_track (mm/kasan/common.c:78)
[   12.699828][  T253]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.699831][  T253]  ? netlink_seq_next (net/netlink/af_netlink.c:2685)
[   12.699835][  T253]  ? ___sys_sendmsg (net/socket.c:2757)
[   12.699842][  T253]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   12.699845][  T253]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   12.699849][  T253]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.699853][  T253]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   12.699855][  T253]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.699858][  T253]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.699861][  T253]  ? trace_contention_end (./include/trace/events/lock.h:121 (discriminator 22))
[   12.699866][  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)
[   12.699869][  T253]  ? __mutex_lock (kernel/locking/mutex.c:656 (discriminator 1) kernel/locking/mutex.c:821 (discriminator 1))
[   12.699872][  T253]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   12.699878][  T253]  ? ww_mutex_lock (kernel/locking/mutex.c:934)
[   12.699880][  T253]  ? nla_get_range_signed (lib/nlattr.c:270)
[   12.699889][  T253]  ? __rtnl_newlink (net/core/rtnetlink.c:4063)
[   12.699898][  T253]  rtnl_newlink (net/core/rtnetlink.c:4215)
[   12.699908][  T253]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   12.699911][  T253]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.699919][  T253]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   12.699922][  T253]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   12.699925][  T253]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   12.699928][  T253]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   12.699934][  T253]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   12.699938][  T253]  rtnetlink_rcv_msg (net/core/rtnetlink.c:7132)
[   12.699943][  T253]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   12.699945][  T253]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.699953][  T253]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   12.699956][  T253]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   12.699962][  T253]  netlink_rcv_skb (net/netlink/af_netlink.c:2556)
[   12.699964][  T253]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   12.699969][  T253]  ? netlink_ack (./include/linux/skbuff.h:2718)
[   12.699980][  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))
[   12.699982][  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))
[   12.699990][  T253]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1345)
[   12.699996][  T253]  ? netlink_attachskb (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[   12.700000][  T253]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.700008][  T253]  netlink_sendmsg (net/netlink/af_netlink.c:1900)
[   12.700014][  T253]  ? netlink_unicast (./include/net/net_namespace.h:422 (discriminator 7))
[   12.700021][  T253]  ? __might_fault (mm/memory.c:7482 (discriminator 5))
[   12.700028][  T253]  ____sys_sendmsg (net/socket.c:800 (discriminator 4) net/socket.c:815 (discriminator 4) net/socket.c:2713 (discriminator 4))
[   12.700032][  T253]  ? copy_msghdr_from_user (net/socket.c:2650)
[   12.700035][  T253]  ? get_timestamp.constprop.0 (./include/linux/netdevice.h:5399)
[   12.700038][  T253]  ? move_addr_to_kernel (net/socket.c:258)
[   12.700051][  T253]  ___sys_sendmsg (net/socket.c:2767)
[   12.700055][  T253]  ? copy_msghdr_from_user (net/socket.c:2619)
[   12.700084][  T253]  __sys_sendmsg (net/socket.c:2799)
[   12.700089][  T253]  ? __sys_sendmsg_sock (net/socket.c:2780)
[   12.700100][  T253]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.700106][  T253]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   12.700109][  T253]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   12.700114][  T253]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   12.700117][  T253] RIP: 0033:0x7ff3a63d254e
[   12.700124][  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
[   12.700127][  T253] RSP: 002b:00007ffdd4fd9c20 EFLAGS: 00000202 ORIG_RAX: 000000000000002e
[   12.700130][  T253] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007ff3a63d254e
[   12.700132][  T253] RDX: 0000000000000000 RSI: 00007ffdd4fd9cd0 RDI: 0000000000000005
[   12.700133][  T253] RBP: 00007ffdd4fd9c30 R08: 0000000000000000 R09: 0000000000000000
[   12.700135][  T253] R10: 0000000000000000 R11: 0000000000000202 R12: 000000006a9159ff
[   12.700136][  T253] R13: 00000000004a1620 R14: 0000000000000000 R15: 00007ffdd4fda390
| [   24.132941][  T358] softirqs last disabled at (14392): br_device_event (./include/linux/spinlock.h:353 net/bridge/br.c:109) bridge
| [   24.132949][  T358] Preemption disabled at:
| [   24.132950][  T358] 0x0
| [   24.132960][  T358] Tainted: [W]=WARN
[   24.132961][  T358] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   24.132963][  T358] Call Trace:
[   24.132965][  T358]  <TASK>
[   24.132966][  T358]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   24.132973][  T358]  __might_resched.cold (kernel/sched/core.c:9234)
[   24.132977][  T358]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   24.132982][  T358]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   24.132987][  T358]  __kmalloc_noprof (./include/linux/sched/mm.h:322 (discriminator 2) mm/slub.c:4636 (discriminator 2) mm/slub.c:4974 (discriminator 2) mm/slub.c:5413 (discriminator 2) mm/slub.c:5439 (discriminator 2))
[   24.132989][  T358]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   24.132995][  T358]  ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:58 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[   24.132998][  T358]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   24.133001][  T358]  put_chars (drivers/char/virtio_console.c:1176)
[   24.133004][  T358]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   24.133005][  T358]  ? check_prev_add (kernel/locking/lockdep.c:3185)
[   24.133010][  T358]  ? validate_chain (kernel/locking/lockdep.c:159 kernel/locking/lockdep.c:191 kernel/locking/lockdep.c:3928)
[   24.133013][  T358]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   24.133016][  T358]  ? mark_usage (kernel/locking/lockdep.c:4690)
[   24.133018][  T358]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   24.133019][  T358]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   24.133023][  T358]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   24.133025][  T358]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   24.133029][  T358]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   24.133033][  T358]  console_emit_next_record (kernel/printk/printk.c:3183)
[   24.133037][  T358]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   24.133039][  T358]  ? console_flush_one_record (./include/linux/rcupdate.h:314 (discriminator 2) ./include/linux/srcu.h:439 (discriminator 2) kernel/printk/printk.c:291 (discriminator 2) kernel/printk/printk.c:3246 (discriminator 2))
[   24.133042][  T358]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   24.133046][  T358]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   24.133050][  T358]  console_flush_one_record (kernel/printk/printk.c:3268)
[   24.133054][  T358]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   24.133056][  T358]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   24.133061][  T358]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   24.133064][  T358]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   24.133066][  T358]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   24.133068][  T358]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   24.133072][  T358]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   24.133074][  T358]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   24.133077][  T358]  vprintk_emit (kernel/printk/printk.c:2479)
[   24.133081][  T358]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   24.133083][  T358]  ? mark_held_locks (kernel/locking/lockdep.c:4341)
[   24.133086][  T358]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   24.133088][  T358]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   24.133092][  T358]  _printk (kernel/printk/printk.c:2504)
[   24.133096][  T358]  ? snapshot_read.cold (user.c:?)
[   24.133104][  T358] br_set_state (net/bridge/br_stp.c:57 (discriminator 2)) bridge
[   24.133115][  T358] br_stp_disable_port (net/bridge/br_stp_if.c:106) bridge
[   24.133127][  T358] br_device_event (net/bridge/br.c:111) bridge
[   24.133134][  T358]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:211 (discriminator 1) kernel/locking/spinlock.c:221 (discriminator 1))
[   24.133139][  T358]  ? _sub_I_65535_1+0x4d0/0x4d0 stp
[   24.133145][  T358]  notifier_call_chain (kernel/notifier.c:85)
[   24.133150][  T358]  __dev_notify_flags (net/core/dev.c:2313 net/core/dev.c:2327 net/core/dev.c:9855)
[   24.133155][  T358]  ? netif_change_name (net/core/dev.c:1517)
[   24.133159][  T358]  ? netif_set_allmulti (./include/net/netdev_lock.h:30 (discriminator 1))
[   24.133162][  T358]  ? __kernel_text_address (kernel/extable.c:79)
[   24.133164][  T358]  ? write_profile (profile.c:?)
[   24.133167][  T358]  ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:385 arch/x86/kernel/unwind_orc.c:380)
[   24.133172][  T358]  netif_change_flags (net/core/dev.c:9882)
[   24.133176][  T358]  do_setlink.isra.0 (net/core/rtnetlink.c:3266 (discriminator 1))
[   24.133180][  T358]  ? stack_trace_save (kernel/stacktrace.c:122 (discriminator 1))
[   24.133182][  T358]  ? rtnl_link_get_size (net/core/rtnetlink.c:747)
[   24.133183][  T358]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:388 kernel/rcu/update.c:380)
[   24.133185][  T358]  ? stack_depot_save_flags (lib/stackdepot.c:609 (discriminator 2) lib/stackdepot.c:676 (discriminator 2))
[   24.133188][  T358]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   24.133191][  T358]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   24.133193][  T358]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   24.133196][  T358]  ? kasan_save_stack (mm/kasan/common.c:58)
[   24.133199][  T358]  ? kasan_save_stack (mm/kasan/common.c:57)
[   24.133200][  T358]  ? kasan_save_track (mm/kasan/common.c:78)
[   24.133203][  T358]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   24.133205][  T358]  ? netlink_seq_next (net/netlink/af_netlink.c:2685)
[   24.133208][  T358]  ? ___sys_sendmsg (net/socket.c:2757)
[   24.133213][  T358]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   24.133215][  T358]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   24.133217][  T358]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   24.133220][  T358]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   24.133221][  T358]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   24.133223][  T358]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   24.133226][  T358]  ? trace_contention_end (./include/trace/events/lock.h:121 (discriminator 22))
[   24.133230][  T358]  ? __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)
[   24.133231][  T358]  ? __mutex_lock (kernel/locking/mutex.c:656 (discriminator 1) kernel/locking/mutex.c:821 (discriminator 1))
[   24.133233][  T358]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   24.133237][  T358]  ? ww_mutex_lock (kernel/locking/mutex.c:934)
[   24.133242][  T358]  ? __rtnl_newlink (net/core/rtnetlink.c:4063)
[   24.133248][  T358]  rtnl_newlink (net/core/rtnetlink.c:4215)
[   24.133253][  T358]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   24.133255][  T358]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   24.133259][  T358]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   24.133261][  T358]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   24.133264][  T358]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   24.133265][  T358]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   24.133269][  T358]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   24.133271][  T358]  rtnetlink_rcv_msg (net/core/rtnetlink.c:7132)
[   24.133274][  T358]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   24.133276][  T358]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   24.133280][  T358]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   24.133282][  T358]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   24.133286][  T358]  netlink_rcv_skb (net/netlink/af_netlink.c:2556)
[   24.133288][  T358]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   24.133291][  T358]  ? netlink_ack (./include/linux/skbuff.h:2718)
[   24.133297][  T358]  ? 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))
[   24.133298][  T358]  ? 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))
[   24.133303][  T358]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1345)
[   24.133307][  T358]  ? netlink_attachskb (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[   24.133309][  T358]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   24.133313][  T358]  netlink_sendmsg (net/netlink/af_netlink.c:1900)
[   24.133317][  T358]  ? netlink_unicast (./include/net/net_namespace.h:422 (discriminator 7))
[   24.133321][  T358]  ? __might_fault (mm/memory.c:7482 (discriminator 5))
[   24.133327][  T358]  ____sys_sendmsg (net/socket.c:800 (discriminator 4) net/socket.c:815 (discriminator 4) net/socket.c:2713 (discriminator 4))
[   24.133329][  T358]  ? copy_msghdr_from_user (net/socket.c:2650)
[   24.133332][  T358]  ? get_timestamp.constprop.0 (./include/linux/netdevice.h:5399)
[   24.133333][  T358]  ? move_addr_to_kernel (net/socket.c:258)
[   24.133341][  T358]  ___sys_sendmsg (net/socket.c:2767)
[   24.133343][  T358]  ? copy_msghdr_from_user (net/socket.c:2619)
[   24.133359][  T358]  __sys_sendmsg (net/socket.c:2799)
[   24.133362][  T358]  ? __sys_sendmsg_sock (net/socket.c:2780)
[   24.133369][  T358]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   24.133372][  T358]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   24.133375][  T358]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   24.133378][  T358]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   24.133380][  T358] RIP: 0033:0x7fa29b51b54e
[   24.133382][  T358] 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
[   24.133384][  T358] RSP: 002b:00007ffe58fd70a0 EFLAGS: 00000202 ORIG_RAX: 000000000000002e
[   24.133387][  T358] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fa29b51b54e
[   24.133389][  T358] RDX: 0000000000000000 RSI: 00007ffe58fd7150 RDI: 0000000000000005
[   24.133389][  T358] RBP: 00007ffe58fd70b0 R08: 0000000000000000 R09: 0000000000000000
[   24.133390][  T358] R10: 0000000000000000 R11: 0000000000000202 R12: 000000006a915a0a


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
__irq_exit_rcu:dump_stack_lvl:__kmalloc_noprof:put_chars:hvc_console_print