======================================
| [   10.672439][  T192] softirqs last disabled at (35553): __irq_exit_rcu (kernel/softirq.c:679 kernel/softirq.c:519 kernel/softirq.c:767)
| [   10.672442][  T192] Preemption disabled at:
| [   10.672442][  T192] 0x0
| [   10.672453][  T192] Tainted: [W]=WARN
[   10.672454][  T192] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   10.672456][  T192] Call Trace:
[   10.672458][  T192]  <TASK>
[   10.672459][  T192]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   10.672466][  T192]  __might_resched.cold (kernel/sched/core.c:9234)
[   10.672470][  T192]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   10.672474][  T192]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   10.672480][  T192]  __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))
[   10.672482][  T192]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   10.672488][  T192]  ? 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)
[   10.672491][  T192]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   10.672494][  T192]  put_chars (drivers/char/virtio_console.c:1176)
[   10.672497][  T192]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   10.672498][  T192]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   10.672503][  T192]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   10.672508][  T192]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   10.672515][  T192]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   10.672517][  T192]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   10.672519][  T192]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   10.672523][  T192]  console_emit_next_record (kernel/printk/printk.c:3183)
[   10.672527][  T192]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   10.672529][  T192]  ? 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))
[   10.672532][  T192]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   10.672534][  T192]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   10.672538][  T192]  console_flush_one_record (kernel/printk/printk.c:3268)
[   10.672542][  T192]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   10.672544][  T192]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   10.672549][  T192]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   10.672552][  T192]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   10.672554][  T192]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   10.672556][  T192]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   10.672560][  T192]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   10.672561][  T192]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   10.672565][  T192]  vprintk_emit (kernel/printk/printk.c:2479)
[   10.672568][  T192]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   10.672572][  T192]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   10.672575][  T192]  _printk (kernel/printk/printk.c:2504)
[   10.672579][  T192]  ? snapshot_read.cold (user.c:?)
[   10.672582][  T192]  ? 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)
[   10.672584][  T192]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[   10.672588][  T192]  ? 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)
[   10.672591][  T192]  do_exit.cold (kernel/exit.c:889 (discriminator 4) kernel/exit.c:1043 (discriminator 4))
[   10.672595][  T192]  ? exit_notify (kernel/exit.c:780)
[   10.672597][  T192]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   10.672599][  T192]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   10.672603][  T192]  do_group_exit (kernel/exit.c:1151)
[   10.672606][  T192]  __x64_sys_exit_group (kernel/exit.c:1162 kernel/exit.c:1160 kernel/exit.c:1160)
[   10.672608][  T192]  x64_sys_call (./arch/x86/include/generated/asm/syscalls_64.h:232)
[   10.672610][  T192]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   10.672613][  T192]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   10.672616][  T192]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   10.672619][  T192] RIP: 0033:0x7f2fa252b1b8
[   10.672621][  T192] Code: Unable to access opcode bytes at 0x7f2fa252b18e.

Code starting with the faulting instruction
===========================================
[   10.672622][  T192] RSP: 002b:00007ffc722f7e08 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   10.672625][  T192] RAX: ffffffffffffffda RBX: 00007f2fa265bf88 RCX: 00007f2fa252b1b8
[   10.672626][  T192] RDX: 00007f2fa2275fc8 RSI: fffffffffffffeb8 RDI: 0000000000000000
[   10.672627][  T192] RBP: 00007ffc722f7e60 R08: 0000000000000000 R09: 0000000000008010
[   10.672628][  T192] R10: 00007ffc722f7c20 R11: 0000000000000246 R12: 0000000000000001
[   10.672629][  T192] R13: 0000000000000000 R14: 00007f2fa265a680 R15: 00007f2fa265bfa0
| [   12.193790][  T251] softirqs last disabled at (19726): __alloc_skb (./include/linux/bottom_half.h:20 (discriminator 2) net/core/skbuff.c:697 (discriminator 2))
| [   12.193792][  T251] Preemption disabled at:
| [   12.193793][  T251] vprintk_emit (kernel/printk/printk.c:2471)
| [   12.193802][  T251] Tainted: [W]=WARN
[   12.193803][  T251] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   12.193805][  T251] Call Trace:
[   12.193807][  T251]  <TASK>
[   12.193809][  T251]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   12.193814][  T251]  ? vprintk_emit (kernel/printk/printk.c:2471)
[   12.193816][  T251]  __might_resched.cold (kernel/sched/core.c:9234)
[   12.193821][  T251]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   12.193825][  T251]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   12.193830][  T251]  __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))
[   12.193833][  T251]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   12.193838][  T251]  ? 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)
[   12.193841][  T251]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   12.193844][  T251]  put_chars (drivers/char/virtio_console.c:1176)
[   12.193847][  T251]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   12.193851][  T251]  ? validate_chain (kernel/locking/lockdep.c:159 kernel/locking/lockdep.c:191 kernel/locking/lockdep.c:3928)
[   12.193855][  T251]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   12.193857][  T251]  ? mark_usage (kernel/locking/lockdep.c:4690)
[   12.193859][  T251]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.193861][  T251]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.193865][  T251]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   12.193867][  T251]  ? console_emit_next_record (kernel/printk/printk.c:3095 (discriminator 2) kernel/printk/printk.c:3182 (discriminator 2))
[   12.193870][  T251]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.193874][  T251]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   12.193878][  T251]  console_emit_next_record (kernel/printk/printk.c:3183)
[   12.193882][  T251]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   12.193884][  T251]  ? 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))
[   12.193887][  T251]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.193890][  T251]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   12.193894][  T251]  console_flush_one_record (kernel/printk/printk.c:3268)
[   12.193898][  T251]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   12.193900][  T251]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.193905][  T251]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   12.193908][  T251]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   12.193910][  T251]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.193912][  T251]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   12.193916][  T251]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   12.193917][  T251]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   12.193921][  T251]  vprintk_emit (kernel/printk/printk.c:2479)
[   12.193925][  T251]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   12.193927][  T251]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   12.193929][  T251]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:211 (discriminator 1) kernel/locking/spinlock.c:221 (discriminator 1))
[   12.193933][  T251]  ? mark_held_locks (kernel/locking/lockdep.c:4341)
[   12.193937][  T251]  _printk (kernel/printk/printk.c:2504)
[   12.193940][  T251]  ? snapshot_read.cold (user.c:?)
[   12.193944][  T251]  ? br_multicast_flood (??:?) bridge
[   12.193958][  T251]  ? do_setlink.isra.0 (net/core/rtnetlink.c:3273 (discriminator 1))
[   12.193959][  T251]  ? rtnl_newlink (net/core/rtnetlink.c:4215)
[   12.193960][  T251]  ? rtnetlink_rcv_msg (net/core/rtnetlink.c:7132)
[   12.193965][  T251] br_set_state (net/bridge/br_stp.c:57 (discriminator 2)) bridge
[   12.193975][  T251] br_init_port (net/bridge/br_stp_if.c:39) bridge
[   12.193984][  T251] new_nbp (net/bridge/br_if.c:449) bridge
[   12.193994][  T251] br_add_if (net/bridge/br_if.c:592) bridge
[   12.194001][  T251]  ? is_bpf_text_address (./include/linux/rcupdate.h:882 kernel/bpf/core.c:751)
[   12.194005][  T251]  ? kernel_text_address (kernel/extable.c:125 kernel/extable.c:94)
[   12.194008][  T251]  ? __kernel_text_address (kernel/extable.c:79)
[   12.194012][  T251]  do_set_master (net/core/rtnetlink.c:3071)
[   12.194017][  T251]  do_setlink.isra.0 (net/core/rtnetlink.c:3273 (discriminator 1))
[   12.194020][  T251]  ? stack_trace_save (kernel/stacktrace.c:122 (discriminator 1))
[   12.194023][  T251]  ? rtnl_link_get_size (net/core/rtnetlink.c:747)
[   12.194024][  T251]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:388 kernel/rcu/update.c:380)
[   12.194027][  T251]  ? stack_depot_save_flags (lib/stackdepot.c:609 (discriminator 2) lib/stackdepot.c:676 (discriminator 2))
[   12.194031][  T251]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   12.194033][  T251]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   12.194035][  T251]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   12.194038][  T251]  ? kasan_save_stack (mm/kasan/common.c:58)
[   12.194041][  T251]  ? kasan_save_stack (mm/kasan/common.c:57)
[   12.194043][  T251]  ? kasan_save_track (mm/kasan/common.c:78)
[   12.194045][  T251]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.194047][  T251]  ? netlink_seq_next (net/netlink/af_netlink.c:2684)
[   12.194050][  T251]  ? ___sys_sendmsg (net/socket.c:2757)
[   12.194055][  T251]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   12.194057][  T251]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   12.194060][  T251]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.194062][  T251]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   12.194064][  T251]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.194066][  T251]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.194068][  T251]  ? trace_contention_end (./include/trace/events/lock.h:121 (discriminator 22))
[   12.194072][  T251]  ? __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)
[   12.194074][  T251]  ? __mutex_lock (kernel/locking/mutex.c:656 (discriminator 1) kernel/locking/mutex.c:821 (discriminator 1))
[   12.194076][  T251]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   12.194079][  T251]  ? ww_mutex_lock (kernel/locking/mutex.c:934)
[   12.194081][  T251]  ? nla_get_range_signed (lib/nlattr.c:270)
[   12.194086][  T251]  ? __rtnl_newlink (net/core/rtnetlink.c:4063)
[   12.194091][  T251]  rtnl_newlink (net/core/rtnetlink.c:4215)
[   12.194097][  T251]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   12.194099][  T251]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.194103][  T251]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   12.194105][  T251]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   12.194107][  T251]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   12.194109][  T251]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   12.194113][  T251]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   12.194115][  T251]  rtnetlink_rcv_msg (net/core/rtnetlink.c:7132)
[   12.194118][  T251]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   12.194120][  T251]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.194124][  T251]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   12.194126][  T251]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   12.194129][  T251]  netlink_rcv_skb (net/netlink/af_netlink.c:2556)
[   12.194131][  T251]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   12.194134][  T251]  ? netlink_ack (./include/linux/skbuff.h:2718)
[   12.194140][  T251]  ? 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))
[   12.194142][  T251]  ? 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))
[   12.194146][  T251]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1345)
[   12.194150][  T251]  ? netlink_attachskb (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[   12.194153][  T251]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.194157][  T251]  netlink_sendmsg (net/netlink/af_netlink.c:1900)
[   12.194161][  T251]  ? netlink_unicast (./include/net/net_namespace.h:422 (discriminator 7))
[   12.194165][  T251]  ? __might_fault (mm/memory.c:7482 (discriminator 5))
[   12.194170][  T251]  ____sys_sendmsg (net/socket.c:800 (discriminator 4) net/socket.c:815 (discriminator 4) net/socket.c:2713 (discriminator 4))
[   12.194172][  T251]  ? copy_msghdr_from_user (net/socket.c:2650)
[   12.194175][  T251]  ? get_timestamp.constprop.0 (./include/linux/netdevice.h:5399)
[   12.194176][  T251]  ? move_addr_to_kernel (net/socket.c:258)
[   12.194184][  T251]  ___sys_sendmsg (net/socket.c:2767)
[   12.194187][  T251]  ? copy_msghdr_from_user (net/socket.c:2619)
[   12.194203][  T251]  __sys_sendmsg (net/socket.c:2799)
[   12.194206][  T251]  ? __sys_sendmsg_sock (net/socket.c:2780)
[   12.194212][  T251]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.194216][  T251]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   12.194218][  T251]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   12.194221][  T251]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   12.194224][  T251] RIP: 0033:0x7f9ea2ca554e
[   12.194227][  T251] 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
[   12.194229][  T251] RSP: 002b:00007ffe337ead40 EFLAGS: 00000202 ORIG_RAX: 000000000000002e
[   12.194232][  T251] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f9ea2ca554e
[   12.194233][  T251] RDX: 0000000000000000 RSI: 00007ffe337eadf0 RDI: 0000000000000005
[   12.194234][  T251] RBP: 00007ffe337ead50 R08: 0000000000000000 R09: 0000000000000000
[   12.194235][  T251] R10: 0000000000000000 R11: 0000000000000202 R12: 000000006a91ada4
[   12.194236][  T251] R13: 00000000004a1620 R14: 0000000000000000 R15: 00007ffe337eb4b0
| [   27.044182][  T396] softirqs last disabled at (13484): br_device_event (./include/linux/spinlock.h:353 net/bridge/br.c:109) bridge
| [   27.044190][  T396] Preemption disabled at:
| [   27.044191][  T396] 0x0
| [   27.044201][  T396] Tainted: [W]=WARN
[   27.044202][  T396] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   27.044204][  T396] Call Trace:
[   27.044205][  T396]  <TASK>
[   27.044207][  T396]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   27.044214][  T396]  __might_resched.cold (kernel/sched/core.c:9234)
[   27.044219][  T396]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   27.044223][  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)
[   27.044228][  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))
[   27.044231][  T396]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   27.044236][  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)
[   27.044239][  T396]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   27.044243][  T396]  put_chars (drivers/char/virtio_console.c:1176)
[   27.044246][  T396]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   27.044247][  T396]  ? check_prev_add (kernel/locking/lockdep.c:3185)
[   27.044251][  T396]  ? validate_chain (kernel/locking/lockdep.c:159 kernel/locking/lockdep.c:191 kernel/locking/lockdep.c:3928)
[   27.044255][  T396]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   27.044258][  T396]  ? mark_usage (kernel/locking/lockdep.c:4690)
[   27.044259][  T396]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   27.044261][  T396]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   27.044266][  T396]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   27.044268][  T396]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   27.044272][  T396]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   27.044276][  T396]  console_emit_next_record (kernel/printk/printk.c:3183)
[   27.044280][  T396]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   27.044282][  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))
[   27.044285][  T396]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   27.044289][  T396]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   27.044294][  T396]  console_flush_one_record (kernel/printk/printk.c:3268)
[   27.044298][  T396]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   27.044300][  T396]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   27.044305][  T396]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   27.044308][  T396]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   27.044310][  T396]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   27.044312][  T396]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   27.044316][  T396]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   27.044318][  T396]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   27.044321][  T396]  vprintk_emit (kernel/printk/printk.c:2479)
[   27.044325][  T396]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   27.044327][  T396]  ? mark_held_locks (kernel/locking/lockdep.c:4341)
[   27.044329][  T396]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   27.044332][  T396]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   27.044337][  T396]  _printk (kernel/printk/printk.c:2504)
[   27.044340][  T396]  ? snapshot_read.cold (user.c:?)
[   27.044348][  T396] br_set_state (net/bridge/br_stp.c:57 (discriminator 2)) bridge
[   27.044360][  T396] br_stp_disable_port (net/bridge/br_stp_if.c:106) bridge
[   27.044370][  T396] br_device_event (net/bridge/br.c:111) bridge
[   27.044377][  T396]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:211 (discriminator 1) kernel/locking/spinlock.c:221 (discriminator 1))
[   27.044381][  T396]  ? _sub_I_65535_1+0x4d0/0x4d0 stp
[   27.044388][  T396]  notifier_call_chain (kernel/notifier.c:85)
[   27.044394][  T396]  __dev_notify_flags (net/core/dev.c:2313 net/core/dev.c:2327 net/core/dev.c:9855)
[   27.044398][  T396]  ? netif_change_name (net/core/dev.c:1517)
[   27.044402][  T396]  ? netif_set_allmulti (./include/net/netdev_lock.h:30 (discriminator 1))
[   27.044405][  T396]  ? __kernel_text_address (kernel/extable.c:79)
[   27.044408][  T396]  ? write_profile (profile.c:?)
[   27.044410][  T396]  ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:385 arch/x86/kernel/unwind_orc.c:380)
[   27.044415][  T396]  netif_change_flags (net/core/dev.c:9882)
[   27.044419][  T396]  do_setlink.isra.0 (net/core/rtnetlink.c:3266 (discriminator 1))
[   27.044423][  T396]  ? stack_trace_save (kernel/stacktrace.c:122 (discriminator 1))
[   27.044425][  T396]  ? rtnl_link_get_size (net/core/rtnetlink.c:747)
[   27.044426][  T396]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:388 kernel/rcu/update.c:380)
[   27.044428][  T396]  ? stack_depot_save_flags (lib/stackdepot.c:609 (discriminator 2) lib/stackdepot.c:676 (discriminator 2))
[   27.044432][  T396]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   27.044435][  T396]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   27.044436][  T396]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   27.044439][  T396]  ? kasan_save_stack (mm/kasan/common.c:58)
[   27.044442][  T396]  ? kasan_save_stack (mm/kasan/common.c:57)
[   27.044444][  T396]  ? kasan_save_track (mm/kasan/common.c:78)
[   27.044447][  T396]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   27.044448][  T396]  ? netlink_seq_next (net/netlink/af_netlink.c:2684)
[   27.044452][  T396]  ? ___sys_sendmsg (net/socket.c:2757)
[   27.044457][  T396]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   27.044459][  T396]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   27.044461][  T396]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   27.044464][  T396]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   27.044465][  T396]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   27.044467][  T396]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   27.044470][  T396]  ? trace_contention_end (./include/trace/events/lock.h:121 (discriminator 22))
[   27.044474][  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)
[   27.044476][  T396]  ? __mutex_lock (kernel/locking/mutex.c:656 (discriminator 1) kernel/locking/mutex.c:821 (discriminator 1))
[   27.044478][  T396]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   27.044481][  T396]  ? ww_mutex_lock (kernel/locking/mutex.c:934)
[   27.044487][  T396]  ? __rtnl_newlink (net/core/rtnetlink.c:4063)
[   27.044492][  T396]  rtnl_newlink (net/core/rtnetlink.c:4215)
[   27.044498][  T396]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   27.044500][  T396]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   27.044504][  T396]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   27.044506][  T396]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   27.044508][  T396]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   27.044510][  T396]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   27.044514][  T396]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   27.044516][  T396]  rtnetlink_rcv_msg (net/core/rtnetlink.c:7132)
[   27.044519][  T396]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   27.044521][  T396]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   27.044526][  T396]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   27.044528][  T396]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   27.044531][  T396]  netlink_rcv_skb (net/netlink/af_netlink.c:2556)
[   27.044533][  T396]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   27.044536][  T396]  ? netlink_ack (./include/linux/skbuff.h:2718)
[   27.044543][  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))
[   27.044544][  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))
[   27.044548][  T396]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1345)
[   27.044552][  T396]  ? netlink_attachskb (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[   27.044555][  T396]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   27.044559][  T396]  netlink_sendmsg (net/netlink/af_netlink.c:1900)
[   27.044563][  T396]  ? netlink_unicast (./include/net/net_namespace.h:422 (discriminator 7))
[   27.044567][  T396]  ? __might_fault (mm/memory.c:7482 (discriminator 5))
[   27.044573][  T396]  ____sys_sendmsg (net/socket.c:800 (discriminator 4) net/socket.c:815 (discriminator 4) net/socket.c:2713 (discriminator 4))
[   27.044576][  T396]  ? copy_msghdr_from_user (net/socket.c:2650)
[   27.044578][  T396]  ? get_timestamp.constprop.0 (./include/linux/netdevice.h:5399)
[   27.044580][  T396]  ? move_addr_to_kernel (net/socket.c:258)
[   27.044587][  T396]  ___sys_sendmsg (net/socket.c:2767)
[   27.044590][  T396]  ? copy_msghdr_from_user (net/socket.c:2619)
[   27.044606][  T396]  __sys_sendmsg (net/socket.c:2799)
[   27.044610][  T396]  ? __sys_sendmsg_sock (net/socket.c:2780)
[   27.044616][  T396]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   27.044620][  T396]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   27.044622][  T396]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   27.044625][  T396]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   27.044628][  T396] RIP: 0033:0x7fbaff04b54e
[   27.044630][  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
[   27.044632][  T396] RSP: 002b:00007fff1749d450 EFLAGS: 00000202 ORIG_RAX: 000000000000002e
[   27.044635][  T396] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fbaff04b54e
[   27.044636][  T396] RDX: 0000000000000000 RSI: 00007fff1749d500 RDI: 0000000000000005
[   27.044637][  T396] RBP: 00007fff1749d460 R08: 0000000000000000 R09: 0000000000000000
[   27.044638][  T396] R10: 0000000000000000 R11: 0000000000000202 R12: 000000006a91adb3


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