======================================
| [   10.568295][  T187] softirqs last disabled at (30280): netlink_release (./include/net/sock.h:2138 net/netlink/af_netlink.c:727)
| [   10.568297][  T187] Preemption disabled at:
| [   10.568298][  T187] 0x0
| [   10.568308][  T187] Tainted: [W]=WARN
[   10.568309][  T187] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   10.568311][  T187] Call Trace:
[   10.568313][  T187]  <TASK>
[   10.568314][  T187]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   10.568320][  T187]  __might_resched.cold (kernel/sched/core.c:9234)
[   10.568325][  T187]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   10.568329][  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)
[   10.568334][  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))
[   10.568336][  T187]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   10.568342][  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)
[   10.568345][  T187]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   10.568348][  T187]  put_chars (drivers/char/virtio_console.c:1176)
[   10.568350][  T187]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   10.568352][  T187]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   10.568356][  T187]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   10.568361][  T187]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   10.568368][  T187]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   10.568370][  T187]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   10.568372][  T187]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   10.568376][  T187]  console_emit_next_record (kernel/printk/printk.c:3183)
[   10.568380][  T187]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   10.568382][  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))
[   10.568385][  T187]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   10.568387][  T187]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   10.568391][  T187]  console_flush_one_record (kernel/printk/printk.c:3268)
[   10.568395][  T187]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   10.568397][  T187]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   10.568402][  T187]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   10.568405][  T187]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   10.568407][  T187]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   10.568409][  T187]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   10.568413][  T187]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   10.568414][  T187]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   10.568418][  T187]  vprintk_emit (kernel/printk/printk.c:2479)
[   10.568421][  T187]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   10.568425][  T187]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   10.568428][  T187]  _printk (kernel/printk/printk.c:2504)
[   10.568432][  T187]  ? snapshot_read.cold (user.c:?)
[   10.568437][  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)
[   10.568439][  T187]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[   10.568443][  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)
[   10.568445][  T187]  do_exit.cold (kernel/exit.c:889 (discriminator 4) kernel/exit.c:1043 (discriminator 4))
[   10.568449][  T187]  ? exit_notify (kernel/exit.c:780)
[   10.568451][  T187]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   10.568454][  T187]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   10.568458][  T187]  do_group_exit (kernel/exit.c:1151)
[   10.568460][  T187]  __x64_sys_exit_group (kernel/exit.c:1162 kernel/exit.c:1160 kernel/exit.c:1160)
[   10.568462][  T187]  x64_sys_call (./arch/x86/include/generated/asm/syscalls_64.h:232)
[   10.568464][  T187]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   10.568467][  T187]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   10.568470][  T187]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   10.568472][  T187] RIP: 0033:0x7f61c3ca81b8
[   10.568474][  T187] Code: Unable to access opcode bytes at 0x7f61c3ca818e.

Code starting with the faulting instruction
===========================================
[   10.568476][  T187] RSP: 002b:00007ffd66ee7f98 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   10.568478][  T187] RAX: ffffffffffffffda RBX: 00007f61c3dd8f88 RCX: 00007f61c3ca81b8
[   10.568479][  T187] RDX: 00007f61c39f2fc8 RSI: fffffffffffffeb8 RDI: 0000000000000000
[   10.568480][  T187] RBP: 00007ffd66ee7ff0 R08: 0000000000000000 R09: 0000000000008010
[   10.568481][  T187] R10: 00007ffd66ee7db0 R11: 0000000000000246 R12: 0000000000000001
[   10.568482][  T187] R13: 0000000000000000 R14: 00007f61c3dd7680 R15: 00007f61c3dd8fa0
| [   12.153632][  T253] softirqs last disabled at (11950): __alloc_skb (./include/linux/bottom_half.h:20 (discriminator 2) net/core/skbuff.c:697 (discriminator 2))
| [   12.153635][  T253] Preemption disabled at:
| [   12.153635][  T253] vprintk_emit (kernel/printk/printk.c:2471)
| [   12.153645][  T253] Tainted: [W]=WARN
[   12.153646][  T253] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   12.153647][  T253] Call Trace:
[   12.153649][  T253]  <TASK>
[   12.153650][  T253]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   12.153656][  T253]  ? vprintk_emit (kernel/printk/printk.c:2471)
[   12.153659][  T253]  __might_resched.cold (kernel/sched/core.c:9234)
[   12.153663][  T253]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   12.153668][  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)
[   12.153673][  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))
[   12.153675][  T253]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   12.153681][  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)
[   12.153684][  T253]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   12.153687][  T253]  put_chars (drivers/char/virtio_console.c:1176)
[   12.153690][  T253]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   12.153695][  T253]  ? validate_chain (kernel/locking/lockdep.c:159 kernel/locking/lockdep.c:191 kernel/locking/lockdep.c:3928)
[   12.153699][  T253]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   12.153701][  T253]  ? mark_usage (kernel/locking/lockdep.c:4690)
[   12.153703][  T253]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.153709][  T253]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.153713][  T253]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   12.153716][  T253]  ? console_emit_next_record (kernel/printk/printk.c:3095 (discriminator 2) kernel/printk/printk.c:3182 (discriminator 2))
[   12.153719][  T253]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.153723][  T253]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   12.153727][  T253]  console_emit_next_record (kernel/printk/printk.c:3183)
[   12.153730][  T253]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   12.153732][  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))
[   12.153735][  T253]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.153737][  T253]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   12.153741][  T253]  console_flush_one_record (kernel/printk/printk.c:3268)
[   12.153746][  T253]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   12.153748][  T253]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.153753][  T253]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   12.153755][  T253]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   12.153757][  T253]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.153760][  T253]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   12.153763][  T253]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   12.153765][  T253]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   12.153768][  T253]  vprintk_emit (kernel/printk/printk.c:2479)
[   12.153772][  T253]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   12.153775][  T253]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   12.153776][  T253]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:211 (discriminator 1) kernel/locking/spinlock.c:221 (discriminator 1))
[   12.153781][  T253]  ? mark_held_locks (kernel/locking/lockdep.c:4341)
[   12.153784][  T253]  _printk (kernel/printk/printk.c:2504)
[   12.153788][  T253]  ? snapshot_read.cold (user.c:?)
[   12.153792][  T253]  ? br_multicast_flood (??:?) bridge
[   12.153805][  T253]  ? do_setlink.isra.0 (net/core/rtnetlink.c:3273 (discriminator 1))
[   12.153806][  T253]  ? rtnl_newlink (net/core/rtnetlink.c:4215)
[   12.153808][  T253]  ? rtnetlink_rcv_msg (net/core/rtnetlink.c:7132)
[   12.153812][  T253] br_set_state (net/bridge/br_stp.c:57 (discriminator 2)) bridge
[   12.153822][  T253] br_init_port (net/bridge/br_stp_if.c:39) bridge
[   12.153831][  T253] new_nbp (net/bridge/br_if.c:449) bridge
[   12.153840][  T253] br_add_if (net/bridge/br_if.c:592) bridge
[   12.153847][  T253]  ? is_bpf_text_address (./include/linux/rcupdate.h:882 kernel/bpf/core.c:751)
[   12.153851][  T253]  ? kernel_text_address (kernel/extable.c:125 kernel/extable.c:94)
[   12.153854][  T253]  ? __kernel_text_address (kernel/extable.c:79)
[   12.153858][  T253]  do_set_master (net/core/rtnetlink.c:3071)
[   12.153863][  T253]  do_setlink.isra.0 (net/core/rtnetlink.c:3273 (discriminator 1))
[   12.153866][  T253]  ? stack_trace_save (kernel/stacktrace.c:122 (discriminator 1))
[   12.153869][  T253]  ? rtnl_link_get_size (net/core/rtnetlink.c:747)
[   12.153871][  T253]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:388 kernel/rcu/update.c:380)
[   12.153873][  T253]  ? stack_depot_save_flags (lib/stackdepot.c:609 (discriminator 2) lib/stackdepot.c:676 (discriminator 2))
[   12.153877][  T253]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   12.153880][  T253]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   12.153881][  T253]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   12.153884][  T253]  ? kasan_save_stack (mm/kasan/common.c:58)
[   12.153887][  T253]  ? kasan_save_stack (mm/kasan/common.c:57)
[   12.153889][  T253]  ? kasan_save_track (mm/kasan/common.c:78)
[   12.153892][  T253]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.153894][  T253]  ? netlink_seq_next (net/netlink/af_netlink.c:2685)
[   12.153897][  T253]  ? ___sys_sendmsg (net/socket.c:2757)
[   12.153901][  T253]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   12.153903][  T253]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   12.153906][  T253]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.153908][  T253]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   12.153910][  T253]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.153912][  T253]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.153914][  T253]  ? trace_contention_end (./include/trace/events/lock.h:121 (discriminator 22))
[   12.153918][  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)
[   12.153920][  T253]  ? __mutex_lock (kernel/locking/mutex.c:656 (discriminator 1) kernel/locking/mutex.c:821 (discriminator 1))
[   12.153922][  T253]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   12.153925][  T253]  ? ww_mutex_lock (kernel/locking/mutex.c:934)
[   12.153927][  T253]  ? nla_get_range_signed (lib/nlattr.c:270)
[   12.153932][  T253]  ? __rtnl_newlink (net/core/rtnetlink.c:4063)
[   12.153937][  T253]  rtnl_newlink (net/core/rtnetlink.c:4215)
[   12.153943][  T253]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   12.153945][  T253]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.153949][  T253]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   12.153951][  T253]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   12.153953][  T253]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   12.153955][  T253]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   12.153959][  T253]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   12.153961][  T253]  rtnetlink_rcv_msg (net/core/rtnetlink.c:7132)
[   12.153964][  T253]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   12.153965][  T253]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.153970][  T253]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   12.153971][  T253]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   12.153975][  T253]  netlink_rcv_skb (net/netlink/af_netlink.c:2556)
[   12.153977][  T253]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   12.153980][  T253]  ? netlink_ack (./include/linux/skbuff.h:2718)
[   12.153986][  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))
[   12.153987][  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))
[   12.153992][  T253]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1345)
[   12.153995][  T253]  ? netlink_attachskb (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[   12.153998][  T253]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.154002][  T253]  netlink_sendmsg (net/netlink/af_netlink.c:1900)
[   12.154006][  T253]  ? netlink_unicast (./include/net/net_namespace.h:422 (discriminator 7))
[   12.154010][  T253]  ? __might_fault (mm/memory.c:7482 (discriminator 5))
[   12.154015][  T253]  ____sys_sendmsg (net/socket.c:800 (discriminator 4) net/socket.c:815 (discriminator 4) net/socket.c:2713 (discriminator 4))
[   12.154018][  T253]  ? copy_msghdr_from_user (net/socket.c:2650)
[   12.154020][  T253]  ? get_timestamp.constprop.0 (./include/linux/netdevice.h:5399)
[   12.154022][  T253]  ? move_addr_to_kernel (net/socket.c:258)
[   12.154029][  T253]  ___sys_sendmsg (net/socket.c:2767)
[   12.154032][  T253]  ? copy_msghdr_from_user (net/socket.c:2619)
[   12.154047][  T253]  __sys_sendmsg (net/socket.c:2799)
[   12.154050][  T253]  ? __sys_sendmsg_sock (net/socket.c:2780)
[   12.154057][  T253]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.154060][  T253]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   12.154063][  T253]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   12.154066][  T253]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   12.154068][  T253] RIP: 0033:0x7f669128854e
[   12.154072][  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
[   12.154074][  T253] RSP: 002b:00007ffdf341a3f0 EFLAGS: 00000202 ORIG_RAX: 000000000000002e
[   12.154077][  T253] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f669128854e
[   12.154078][  T253] RDX: 0000000000000000 RSI: 00007ffdf341a4a0 RDI: 0000000000000005
[   12.154079][  T253] RBP: 00007ffdf341a400 R08: 0000000000000000 R09: 0000000000000000
[   12.154080][  T253] R10: 0000000000000000 R11: 0000000000000202 R12: 000000006a916322
[   12.154081][  T253] R13: 00000000004a1620 R14: 0000000000000000 R15: 00007ffdf341ab60
| [   26.815448][  T398] softirqs last disabled at (18840): br_device_event (./include/linux/spinlock.h:353 net/bridge/br.c:109) bridge
| [   26.815459][  T398] Preemption disabled at:
| [   26.815459][  T398] 0x0
| [   26.815470][  T398] Tainted: [W]=WARN
[   26.815471][  T398] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   26.815472][  T398] Call Trace:
[   26.815474][  T398]  <TASK>
[   26.815475][  T398]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   26.815482][  T398]  __might_resched.cold (kernel/sched/core.c:9234)
[   26.815486][  T398]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   26.815491][  T398]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   26.815496][  T398]  __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))
[   26.815499][  T398]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   26.815504][  T398]  ? 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)
[   26.815507][  T398]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   26.815510][  T398]  put_chars (drivers/char/virtio_console.c:1176)
[   26.815513][  T398]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   26.815515][  T398]  ? check_prev_add (kernel/locking/lockdep.c:3185)
[   26.815519][  T398]  ? validate_chain (kernel/locking/lockdep.c:159 kernel/locking/lockdep.c:191 kernel/locking/lockdep.c:3928)
[   26.815523][  T398]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   26.815525][  T398]  ? mark_usage (kernel/locking/lockdep.c:4690)
[   26.815527][  T398]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   26.815529][  T398]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   26.815533][  T398]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   26.815534][  T398]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   26.815539][  T398]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   26.815543][  T398]  console_emit_next_record (kernel/printk/printk.c:3183)
[   26.815547][  T398]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   26.815549][  T398]  ? 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))
[   26.815552][  T398]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   26.815556][  T398]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   26.815560][  T398]  console_flush_one_record (kernel/printk/printk.c:3268)
[   26.815564][  T398]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   26.815566][  T398]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   26.815572][  T398]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   26.815574][  T398]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   26.815576][  T398]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   26.815579][  T398]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   26.815582][  T398]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   26.815584][  T398]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   26.815587][  T398]  vprintk_emit (kernel/printk/printk.c:2479)
[   26.815592][  T398]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   26.815593][  T398]  ? mark_held_locks (kernel/locking/lockdep.c:4341)
[   26.815596][  T398]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   26.815599][  T398]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   26.815603][  T398]  _printk (kernel/printk/printk.c:2504)
[   26.815606][  T398]  ? snapshot_read.cold (user.c:?)
[   26.815614][  T398] br_set_state (net/bridge/br_stp.c:57 (discriminator 2)) bridge
[   26.815626][  T398] br_stp_disable_port (net/bridge/br_stp_if.c:106) bridge
[   26.815637][  T398] br_device_event (net/bridge/br.c:111) bridge
[   26.815645][  T398]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:211 (discriminator 1) kernel/locking/spinlock.c:221 (discriminator 1))
[   26.815649][  T398]  ? _sub_I_65535_1+0x4d0/0x4d0 stp
[   26.815655][  T398]  notifier_call_chain (kernel/notifier.c:85)
[   26.815661][  T398]  __dev_notify_flags (net/core/dev.c:2313 net/core/dev.c:2327 net/core/dev.c:9855)
[   26.815666][  T398]  ? netif_change_name (net/core/dev.c:1517)
[   26.815670][  T398]  ? netif_set_allmulti (./include/net/netdev_lock.h:30 (discriminator 1))
[   26.815673][  T398]  ? __kernel_text_address (kernel/extable.c:79)
[   26.815675][  T398]  ? write_profile (profile.c:?)
[   26.815678][  T398]  ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:385 arch/x86/kernel/unwind_orc.c:380)
[   26.815683][  T398]  netif_change_flags (net/core/dev.c:9882)
[   26.815687][  T398]  do_setlink.isra.0 (net/core/rtnetlink.c:3266 (discriminator 1))
[   26.815690][  T398]  ? stack_trace_save (kernel/stacktrace.c:122 (discriminator 1))
[   26.815692][  T398]  ? rtnl_link_get_size (net/core/rtnetlink.c:747)
[   26.815694][  T398]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:388 kernel/rcu/update.c:380)
[   26.815696][  T398]  ? stack_depot_save_flags (lib/stackdepot.c:609 (discriminator 2) lib/stackdepot.c:676 (discriminator 2))
[   26.815699][  T398]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   26.815702][  T398]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   26.815704][  T398]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   26.815706][  T398]  ? kasan_save_stack (mm/kasan/common.c:58)
[   26.815710][  T398]  ? kasan_save_stack (mm/kasan/common.c:57)
[   26.815711][  T398]  ? kasan_save_track (mm/kasan/common.c:78)
[   26.815714][  T398]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   26.815716][  T398]  ? netlink_seq_next (net/netlink/af_netlink.c:2685)
[   26.815719][  T398]  ? ___sys_sendmsg (net/socket.c:2757)
[   26.815724][  T398]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   26.815726][  T398]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   26.815728][  T398]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   26.815731][  T398]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   26.815732][  T398]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   26.815734][  T398]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   26.815737][  T398]  ? trace_contention_end (./include/trace/events/lock.h:121 (discriminator 22))
[   26.815745][  T398]  ? __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)
[   26.815747][  T398]  ? __mutex_lock (kernel/locking/mutex.c:656 (discriminator 1) kernel/locking/mutex.c:821 (discriminator 1))
[   26.815749][  T398]  ? rtnl_newlink (net/core/rtnetlink.c:80 net/core/rtnetlink.c:366 net/core/rtnetlink.c:4214)
[   26.815752][  T398]  ? ww_mutex_lock (kernel/locking/mutex.c:934)
[   26.815758][  T398]  ? __rtnl_newlink (net/core/rtnetlink.c:4063)
[   26.815763][  T398]  rtnl_newlink (net/core/rtnetlink.c:4215)
[   26.815769][  T398]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   26.815770][  T398]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   26.815775][  T398]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   26.815777][  T398]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   26.815779][  T398]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   26.815781][  T398]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   26.815785][  T398]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:5558)
[   26.815787][  T398]  rtnetlink_rcv_msg (net/core/rtnetlink.c:7132)
[   26.815790][  T398]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   26.815791][  T398]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   26.815796][  T398]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5908 (discriminator 2))
[   26.815798][  T398]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   26.815801][  T398]  netlink_rcv_skb (net/netlink/af_netlink.c:2556)
[   26.815803][  T398]  ? rtnl_link_fill (./include/net/netlink.h:1107 (discriminator 1))
[   26.815806][  T398]  ? netlink_ack (./include/linux/skbuff.h:2718)
[   26.815812][  T398]  ? 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))
[   26.815814][  T398]  ? 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))
[   26.815818][  T398]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1345)
[   26.815822][  T398]  ? netlink_attachskb (./arch/x86/include/asm/bitops.h:202 (discriminator 1))
[   26.815825][  T398]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   26.815829][  T398]  netlink_sendmsg (net/netlink/af_netlink.c:1900)
[   26.815833][  T398]  ? netlink_unicast (./include/net/net_namespace.h:422 (discriminator 7))
[   26.815837][  T398]  ? __might_fault (mm/memory.c:7482 (discriminator 5))
[   26.815843][  T398]  ____sys_sendmsg (net/socket.c:800 (discriminator 4) net/socket.c:815 (discriminator 4) net/socket.c:2713 (discriminator 4))
[   26.815845][  T398]  ? copy_msghdr_from_user (net/socket.c:2650)
[   26.815848][  T398]  ? get_timestamp.constprop.0 (./include/linux/netdevice.h:5399)
[   26.815849][  T398]  ? move_addr_to_kernel (net/socket.c:258)
[   26.815857][  T398]  ___sys_sendmsg (net/socket.c:2767)
[   26.815860][  T398]  ? copy_msghdr_from_user (net/socket.c:2619)
[   26.815876][  T398]  __sys_sendmsg (net/socket.c:2799)
[   26.815879][  T398]  ? __sys_sendmsg_sock (net/socket.c:2780)
[   26.815885][  T398]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   26.815889][  T398]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   26.815891][  T398]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   26.815895][  T398]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   26.815897][  T398] RIP: 0033:0x7fdae806254e
[   26.815899][  T398] 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
[   26.815901][  T398] RSP: 002b:00007ffd5bd86920 EFLAGS: 00000202 ORIG_RAX: 000000000000002e
[   26.815904][  T398] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fdae806254e
[   26.815905][  T398] RDX: 0000000000000000 RSI: 00007ffd5bd869d0 RDI: 0000000000000005
[   26.815906][  T398] RBP: 00007ffd5bd86930 R08: 0000000000000000 R09: 0000000000000000
[   26.815907][  T398] R10: 0000000000000000 R11: 0000000000000202 R12: 000000006a916331


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