======================================
| [    9.715104][  T187] softirqs last disabled at (33517): __irq_exit_rcu (kernel/softirq.c:679 kernel/softirq.c:519 kernel/softirq.c:767)
| [    9.715107][  T187] Preemption disabled at:
| [    9.715107][  T187] 0x0
| [    9.715125][  T187] Tainted: [W]=WARN
[    9.715126][  T187] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    9.715128][  T187] Call Trace:
[    9.715130][  T187]  <TASK>
[    9.715132][  T187]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[    9.715138][  T187]  __might_resched.cold (kernel/sched/core.c:9234)
[    9.715143][  T187]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[    9.715147][  T187]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[    9.715152][  T187]  __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))
[    9.715155][  T187]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[    9.715161][  T187]  ? 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)
[    9.715164][  T187]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[    9.715167][  T187]  put_chars (drivers/char/virtio_console.c:1176)
[    9.715170][  T187]  ? __send_to_port (drivers/char/virtio_console.c:654)
[    9.715172][  T187]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[    9.715177][  T187]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[    9.715182][  T187]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[    9.715188][  T187]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[    9.715190][  T187]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[    9.715193][  T187]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[    9.715197][  T187]  console_emit_next_record (kernel/printk/printk.c:3183)
[    9.715201][  T187]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[    9.715203][  T187]  ? 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))
[    9.715206][  T187]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[    9.715209][  T187]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[    9.715213][  T187]  console_flush_one_record (kernel/printk/printk.c:3268)
[    9.715217][  T187]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[    9.715219][  T187]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[    9.715224][  T187]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[    9.715227][  T187]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[    9.715229][  T187]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[    9.715231][  T187]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[    9.715235][  T187]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[    9.715237][  T187]  ? vprintk_emit (kernel/printk/printk.c:2478)
[    9.715240][  T187]  vprintk_emit (kernel/printk/printk.c:2479)
[    9.715244][  T187]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[    9.715248][  T187]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[    9.715252][  T187]  _printk (kernel/printk/printk.c:2504)
[    9.715256][  T187]  ? snapshot_read.cold (user.c:?)
[    9.715259][  T187]  ? 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)
[    9.715261][  T187]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[    9.715265][  T187]  ? 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)
[    9.715268][  T187]  do_exit.cold (kernel/exit.c:889 (discriminator 4) kernel/exit.c:1043 (discriminator 4))
[    9.715272][  T187]  ? exit_notify (kernel/exit.c:780)
[    9.715274][  T187]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[    9.715276][  T187]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[    9.715281][  T187]  do_group_exit (kernel/exit.c:1151)
[    9.715284][  T187]  __x64_sys_exit_group (kernel/exit.c:1162 kernel/exit.c:1160 kernel/exit.c:1160)
[    9.715285][  T187]  x64_sys_call (./arch/x86/include/generated/asm/syscalls_64.h:232)
[    9.715288][  T187]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[    9.715291][  T187]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[    9.715294][  T187]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    9.715297][  T187] RIP: 0033:0x7f8a5a6111b8
[    9.715299][  T187] Code: Unable to access opcode bytes at 0x7f8a5a61118e.

Code starting with the faulting instruction
===========================================
[    9.715300][  T187] RSP: 002b:00007fff14a0f1a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[    9.715303][  T187] RAX: ffffffffffffffda RBX: 00007f8a5a741f88 RCX: 00007f8a5a6111b8
[    9.715304][  T187] RDX: 00007f8a5a35bfc8 RSI: fffffffffffffeb8 RDI: 0000000000000000
[    9.715305][  T187] RBP: 00007fff14a0f200 R08: 0000000000000000 R09: 0000000000008010
[    9.715306][  T187] R10: 00007fff14a0efc0 R11: 0000000000000246 R12: 0000000000000001
[    9.715307][  T187] R13: 0000000000000000 R14: 00007f8a5a740680 R15: 00007f8a5a741fa0
| [   11.071706][  T241] softirqs last disabled at (25510): __alloc_skb (./include/linux/bottom_half.h:20 (discriminator 2) net/core/skbuff.c:697 (discriminator 2))
| [   11.071708][  T241] Preemption disabled at:
| [   11.071709][  T241] vprintk_emit (kernel/printk/printk.c:2471)
| [   11.071719][  T241] Tainted: [W]=WARN
[   11.071719][  T241] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   11.071721][  T241] Call Trace:
[   11.071723][  T241]  <TASK>
[   11.071724][  T241]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   11.071730][  T241]  ? vprintk_emit (kernel/printk/printk.c:2471)
[   11.071732][  T241]  __might_resched.cold (kernel/sched/core.c:9234)
[   11.071737][  T241]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   11.071741][  T241]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   11.071746][  T241]  __kmalloc_noprof (./include/linux/sched/mm.h:322 (discriminator 2) mm/slub.c:4636 (discriminator 2) mm/slub.c:4974 (discriminator 2) mm/slub.c:5413 (discriminator 2) mm/slub.c:5439 (discriminator 2))
[   11.071748][  T241]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   11.071754][  T241]  ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:58 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[   11.071757][  T241]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   11.071760][  T241]  put_chars (drivers/char/virtio_console.c:1176)
[   11.071763][  T241]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   11.071767][  T241]  ? validate_chain (kernel/locking/lockdep.c:159 kernel/locking/lockdep.c:191 kernel/locking/lockdep.c:3928)
[   11.071771][  T241]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   11.071774][  T241]  ? mark_usage (kernel/locking/lockdep.c:4690)
[   11.071775][  T241]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   11.071777][  T241]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   11.071781][  T241]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   11.071783][  T241]  ? console_emit_next_record (kernel/printk/printk.c:3095 (discriminator 2) kernel/printk/printk.c:3182 (discriminator 2))
[   11.071786][  T241]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.071790][  T241]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   11.071794][  T241]  console_emit_next_record (kernel/printk/printk.c:3183)
[   11.071797][  T241]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   11.071799][  T241]  ? console_flush_one_record (./include/linux/rcupdate.h:314 (discriminator 2) ./include/linux/srcu.h:439 (discriminator 2) kernel/printk/printk.c:291 (discriminator 2) kernel/printk/printk.c:3246 (discriminator 2))
[   11.071802][  T241]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.071805][  T241]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   11.071808][  T241]  console_flush_one_record (kernel/printk/printk.c:3268)
[   11.071812][  T241]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   11.071814][  T241]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   11.071819][  T241]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   11.071822][  T241]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   11.071824][  T241]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.071826][  T241]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   11.071829][  T241]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   11.071831][  T241]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   11.071834][  T241]  vprintk_emit (kernel/printk/printk.c:2479)
[   11.071838][  T241]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   11.071840][  T241]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   11.071842][  T241]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:211 (discriminator 1) kernel/locking/spinlock.c:221 (discriminator 1))
[   11.071846][  T241]  ? mark_held_locks (kernel/locking/lockdep.c:4341)
[   11.071850][  T241]  _printk (kernel/printk/printk.c:2504)
[   11.071853][  T241]  ? snapshot_read.cold (user.c:?)
[   11.071857][  T241]  ? br_multicast_flood (??:?) bridge
[   11.071869][  T241]  ? do_setlink.isra.0 (net/core/rtnetlink.c:3273 (discriminator 1))
[   11.071871][  T241]  ? rtnl_newlink (net/core/rtnetlink.c:4215)
[   11.071874][  T241]  ? rtnetlink_rcv_msg (net/core/rtnetlink.c:7132)
[   11.071879][  T241] br_set_state (net/bridge/br_stp.c:57 (discriminator 2)) bridge
[   11.071888][  T241] br_init_port (net/bridge/br_stp_if.c:39) bridge
[   11.071896][  T241] new_nbp (net/bridge/br_if.c:449) bridge
[   11.071905][  T241] br_add_if (net/bridge/br_if.c:592) bridge
[   11.071912][  T241]  ? is_bpf_text_address (./include/linux/rcupdate.h:882 kernel/bpf/core.c:751)
[   11.071916][  T241]  ? kernel_text_address (kernel/extable.c:125 kernel/extable.c:94)
[   11.071919][  T241]  ? __kernel_text_address (kernel/extable.c:79)
[   11.071922][  T241]  do_set_master (net/core/rtnetlink.c:3071)
[   11.071927][  T241]  do_setlink.isra.0 (net/core/rtnetlink.c:3273 (discriminator 1))
[   11.071930][  T241]  ? stack_trace_save (kernel/stacktrace.c:122 (discriminator 1))
[   11.071933][  T241]  ? rtnl_link_get_size (net/core/rtnetlink.c:747)
[   11.071934][  T241]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:388 kernel/rcu/update.c:380)
[   11.071937][  T241]  ? stack_depot_save_flags (lib/stackdepot.c:609 (discriminator 2) lib/stackdepot.c:676 (discriminator 2))
[   11.071940][  T241]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   11.071943][  T241]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   11.071945][  T241]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   11.071947][  T241]  ? kasan_save_stack (mm/kasan/common.c:58)
[   11.071950][  T241]  ? kasan_save_stack (mm/kasan/common.c:57)
[   11.071952][  T241]  ? kasan_save_track (mm/kasan/common.c:78)
[   11.071954][  T241]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   11.071956][  T241]  ? netlink_seq_next (net/netlink/af_netlink.c:2685)
[   11.071959][  T241]  ? ___sys_sendmsg (net/socket.c:2757)
[   11.071964][  T241]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   11.071966][  T241]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   11.071968][  T241]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.071970][  T241]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   11.071972][  T241]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.071974][  T241]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.071976][  T241]  ? trace_contention_end (./include/trace/events/lock.h:121 (discriminator 22))
[   11.071980][  T241]  ? __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)
[   11.071981][  T241]  ? __mutex_lock (kernel/locking/mutex.c:656 (discriminator 1) kernel/locking/mutex.c:821 (discriminator 1))
[   11.071983][  T241]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   11.071986][  T241]  ? ww_mutex_lock (kernel/locking/mutex.c:934)
[   11.071988][  T241]  ? nla_get_range_signed (lib/nlattr.c:270)
[   11.071993][  T241]  ? __rtnl_newlink (net/core/rtnetlink.c:4063)
[   11.071998][  T241]  rtnl_newlink (net/core/rtnetlink.c:4215)
[   11.072003][  T241]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   11.072005][  T241]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   11.072009][  T241]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   11.072011][  T241]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   11.072013][  T241]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   11.072015][  T241]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   11.072018][  T241]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   11.072020][  T241]  rtnetlink_rcv_msg (net/core/rtnetlink.c:7132)
[   11.072023][  T241]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   11.072024][  T241]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   11.072029][  T241]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   11.072030][  T241]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   11.072034][  T241]  netlink_rcv_skb (net/netlink/af_netlink.c:2556)
[   11.072035][  T241]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   11.072038][  T241]  ? netlink_ack (./include/linux/skbuff.h:2718)
[   11.072044][  T241]  ? 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))
[   11.072046][  T241]  ? 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))
[   11.072050][  T241]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1345)
[   11.072053][  T241]  ? netlink_attachskb (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[   11.072056][  T241]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   11.072060][  T241]  netlink_sendmsg (net/netlink/af_netlink.c:1900)
[   11.072063][  T241]  ? netlink_unicast (./include/net/net_namespace.h:422 (discriminator 7))
[   11.072067][  T241]  ? __might_fault (mm/memory.c:7482 (discriminator 5))
[   11.072072][  T241]  ____sys_sendmsg (net/socket.c:800 (discriminator 4) net/socket.c:815 (discriminator 4) net/socket.c:2713 (discriminator 4))
[   11.072074][  T241]  ? copy_msghdr_from_user (net/socket.c:2650)
[   11.072077][  T241]  ? get_timestamp.constprop.0 (./include/linux/netdevice.h:5399)
[   11.072078][  T241]  ? move_addr_to_kernel (net/socket.c:258)
[   11.072085][  T241]  ___sys_sendmsg (net/socket.c:2767)
[   11.072088][  T241]  ? copy_msghdr_from_user (net/socket.c:2619)
[   11.072103][  T241]  __sys_sendmsg (net/socket.c:2799)
[   11.072106][  T241]  ? __sys_sendmsg_sock (net/socket.c:2780)
[   11.072112][  T241]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.072115][  T241]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   11.072118][  T241]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   11.072125][  T241]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   11.072127][  T241] RIP: 0033:0x7f98ff99654e
[   11.072131][  T241] 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
[   11.072133][  T241] RSP: 002b:00007ffd27019b30 EFLAGS: 00000202 ORIG_RAX: 000000000000002e
[   11.072135][  T241] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f98ff99654e
[   11.072137][  T241] RDX: 0000000000000000 RSI: 00007ffd27019be0 RDI: 0000000000000005
[   11.072138][  T241] RBP: 00007ffd27019b40 R08: 0000000000000000 R09: 0000000000000000
[   11.072139][  T241] R10: 0000000000000000 R11: 0000000000000202 R12: 000000006a91056b
[   11.072140][  T241] R13: 00000000004a1620 R14: 0000000000000000 R15: 00007ffd2701a2a0
| [   26.221520][  T623] softirqs last disabled at (13318): br_device_event (./include/linux/spinlock.h:353 net/bridge/br.c:109) bridge
| [   26.221528][  T623] Preemption disabled at:
| [   26.221528][  T623] 0x0
| [   26.221539][  T623] Tainted: [W]=WARN
[   26.221540][  T623] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   26.221542][  T623] Call Trace:
[   26.221543][  T623]  <TASK>
[   26.221545][  T623]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   26.221552][  T623]  __might_resched.cold (kernel/sched/core.c:9234)
[   26.221556][  T623]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   26.221561][  T623]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   26.221566][  T623]  __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))
[   26.221568][  T623]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   26.221574][  T623]  ? 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)
[   26.221576][  T623]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   26.221579][  T623]  put_chars (drivers/char/virtio_console.c:1176)
[   26.221582][  T623]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   26.221583][  T623]  ? check_prev_add (kernel/locking/lockdep.c:3185)
[   26.221587][  T623]  ? validate_chain (kernel/locking/lockdep.c:159 kernel/locking/lockdep.c:191 kernel/locking/lockdep.c:3928)
[   26.221591][  T623]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   26.221594][  T623]  ? mark_usage (kernel/locking/lockdep.c:4690)
[   26.221595][  T623]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   26.221597][  T623]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   26.221601][  T623]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   26.221603][  T623]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   26.221607][  T623]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   26.221611][  T623]  console_emit_next_record (kernel/printk/printk.c:3183)
[   26.221615][  T623]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   26.221616][  T623]  ? 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))
[   26.221619][  T623]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   26.221623][  T623]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   26.221627][  T623]  console_flush_one_record (kernel/printk/printk.c:3268)
[   26.221631][  T623]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   26.221633][  T623]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   26.221638][  T623]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   26.221641][  T623]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   26.221643][  T623]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   26.221645][  T623]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   26.221649][  T623]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   26.221651][  T623]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   26.221654][  T623]  vprintk_emit (kernel/printk/printk.c:2479)
[   26.221658][  T623]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   26.221660][  T623]  ? mark_held_locks (kernel/locking/lockdep.c:4341)
[   26.221662][  T623]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   26.221665][  T623]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   26.221669][  T623]  _printk (kernel/printk/printk.c:2504)
[   26.221673][  T623]  ? snapshot_read.cold (user.c:?)
[   26.221680][  T623] br_set_state (net/bridge/br_stp.c:57 (discriminator 2)) bridge
[   26.221691][  T623] br_stp_disable_port (net/bridge/br_stp_if.c:106) bridge
[   26.221701][  T623] br_device_event (net/bridge/br.c:111) bridge
[   26.221708][  T623]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:211 (discriminator 1) kernel/locking/spinlock.c:221 (discriminator 1))
[   26.221712][  T623]  ? _sub_I_65535_1+0x4d0/0x4d0 stp
[   26.221718][  T623]  notifier_call_chain (kernel/notifier.c:85)
[   26.221724][  T623]  __dev_notify_flags (net/core/dev.c:2313 net/core/dev.c:2327 net/core/dev.c:9855)
[   26.221728][  T623]  ? netif_change_name (net/core/dev.c:1517)
[   26.221732][  T623]  ? netif_set_allmulti (./include/net/netdev_lock.h:30 (discriminator 1))
[   26.221735][  T623]  ? __kernel_text_address (kernel/extable.c:79)
[   26.221738][  T623]  ? write_profile (profile.c:?)
[   26.221740][  T623]  ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:385 arch/x86/kernel/unwind_orc.c:380)
[   26.221745][  T623]  netif_change_flags (net/core/dev.c:9882)
[   26.221749][  T623]  do_setlink.isra.0 (net/core/rtnetlink.c:3266 (discriminator 1))
[   26.221752][  T623]  ? stack_trace_save (kernel/stacktrace.c:122 (discriminator 1))
[   26.221754][  T623]  ? rtnl_link_get_size (net/core/rtnetlink.c:747)
[   26.221756][  T623]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:388 kernel/rcu/update.c:380)
[   26.221758][  T623]  ? stack_depot_save_flags (lib/stackdepot.c:609 (discriminator 2) lib/stackdepot.c:676 (discriminator 2))
[   26.221761][  T623]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   26.221764][  T623]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   26.221765][  T623]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   26.221768][  T623]  ? kasan_save_stack (mm/kasan/common.c:58)
[   26.221771][  T623]  ? kasan_save_stack (mm/kasan/common.c:57)
[   26.221773][  T623]  ? kasan_save_track (mm/kasan/common.c:78)
[   26.221776][  T623]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   26.221777][  T623]  ? netlink_seq_next (net/netlink/af_netlink.c:2685)
[   26.221780][  T623]  ? ___sys_sendmsg (net/socket.c:2757)
[   26.221785][  T623]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   26.221787][  T623]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   26.221789][  T623]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   26.221792][  T623]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   26.221793][  T623]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   26.221795][  T623]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   26.221797][  T623]  ? trace_contention_end (./include/trace/events/lock.h:121 (discriminator 22))
[   26.221801][  T623]  ? __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)
[   26.221803][  T623]  ? __mutex_lock (kernel/locking/mutex.c:656 (discriminator 1) kernel/locking/mutex.c:821 (discriminator 1))
[   26.221805][  T623]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   26.221808][  T623]  ? ww_mutex_lock (kernel/locking/mutex.c:934)
[   26.221813][  T623]  ? __rtnl_newlink (net/core/rtnetlink.c:4063)
[   26.221818][  T623]  rtnl_newlink (net/core/rtnetlink.c:4215)
[   26.221824][  T623]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   26.221825][  T623]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   26.221830][  T623]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   26.221832][  T623]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   26.221834][  T623]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   26.221836][  T623]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   26.221839][  T623]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   26.221842][  T623]  rtnetlink_rcv_msg (net/core/rtnetlink.c:7132)
[   26.221845][  T623]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   26.221846][  T623]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   26.221850][  T623]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   26.221852][  T623]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   26.221856][  T623]  netlink_rcv_skb (net/netlink/af_netlink.c:2556)
[   26.221858][  T623]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   26.221860][  T623]  ? netlink_ack (./include/linux/skbuff.h:2718)
[   26.221867][  T623]  ? 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))
[   26.221868][  T623]  ? 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))
[   26.221876][  T623]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1345)
[   26.221880][  T623]  ? netlink_attachskb (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[   26.221883][  T623]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   26.221887][  T623]  netlink_sendmsg (net/netlink/af_netlink.c:1900)
[   26.221890][  T623]  ? netlink_unicast (./include/net/net_namespace.h:422 (discriminator 7))
[   26.221894][  T623]  ? __might_fault (mm/memory.c:7482 (discriminator 5))
[   26.221900][  T623]  ____sys_sendmsg (net/socket.c:800 (discriminator 4) net/socket.c:815 (discriminator 4) net/socket.c:2713 (discriminator 4))
[   26.221902][  T623]  ? copy_msghdr_from_user (net/socket.c:2650)
[   26.221904][  T623]  ? get_timestamp.constprop.0 (./include/linux/netdevice.h:5399)
[   26.221906][  T623]  ? move_addr_to_kernel (net/socket.c:258)
[   26.221913][  T623]  ___sys_sendmsg (net/socket.c:2767)
[   26.221916][  T623]  ? copy_msghdr_from_user (net/socket.c:2619)
[   26.221931][  T623]  __sys_sendmsg (net/socket.c:2799)
[   26.221934][  T623]  ? __sys_sendmsg_sock (net/socket.c:2780)
[   26.221940][  T623]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   26.221944][  T623]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   26.221946][  T623]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   26.221949][  T623]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   26.221952][  T623] RIP: 0033:0x7f57c044954e
[   26.221954][  T623] 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
[   26.221956][  T623] RSP: 002b:00007fff7392d2b0 EFLAGS: 00000202 ORIG_RAX: 000000000000002e
[   26.221959][  T623] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f57c044954e
[   26.221960][  T623] RDX: 0000000000000000 RSI: 00007fff7392d360 RDI: 0000000000000005
[   26.221961][  T623] RBP: 00007fff7392d2c0 R08: 0000000000000000 R09: 0000000000000000
[   26.221962][  T623] R10: 0000000000000000 R11: 0000000000000202 R12: 000000006a91057a


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