======================================
| [   30.984929][  T473]    entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
| [   30.985066][  T473]
| [   30.985123][  T473]
| [   30.985123][  T473] stack backtrace:
[   30.985267][  T473] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   30.985270][  T473] Call Trace:
[   30.985272][  T473]  <TASK>
[   30.985274][  T473]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   30.985280][  T473]  print_irq_inversion_bug.part.0.cold (kernel/locking/lockdep.c:4125)
[   30.985285][  T473]  mark_lock_irq (kernel/locking/lockdep.c:4079 kernel/locking/lockdep.c:4158 kernel/locking/lockdep.c:4294)
[   30.985289][  T473]  mark_lock (kernel/locking/lockdep.c:4753)
[   30.985292][  T473]  mark_usage (kernel/locking/lockdep.c:4666)
[   30.985295][  T473]  __lock_acquire (kernel/locking/lockdep.c:5191)
[   30.985298][  T473]  lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[   30.985301][  T473]  ? __ipv6_dev_ac_dec (./include/linux/spinlock.h:342 net/ipv6/anycast.c:253 net/ipv6/anycast.c:419)
[   30.985303][  T473]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   30.985307][  T473]  ? do_raw_read_unlock (kernel/locking/spinlock_debug.c:180)
[   30.985309][  T473]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[   30.985312][  T473]  _raw_spin_lock (./include/linux/spinlock_api_smp.h:158 (discriminator 1) kernel/locking/spinlock.c:158 (discriminator 1))
[   30.985315][  T473]  ? __ipv6_dev_ac_dec (./include/linux/spinlock.h:342 net/ipv6/anycast.c:253 net/ipv6/anycast.c:419)
[   30.985317][  T473]  __ipv6_dev_ac_dec (./include/linux/spinlock.h:342 net/ipv6/anycast.c:253 net/ipv6/anycast.c:419)
[   30.985321][  T473]  addrconf_leave_anycast (net/ipv6/addrconf.c:2289)
[   30.985323][  T473]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   30.985327][  T473]  ? __ipv6_isatap_ifid (net/ipv6/addrconf.c:2360)
[   30.985329][  T473]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[   30.985332][  T473]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   30.985335][  T473]  dev_forward_change (net/ipv6/addrconf.c:844)
[   30.985338][  T473]  ? addrconf_fixup_forwarding (./include/linux/rtnetlink.h:140 net/ipv6/addrconf.c:878)
[   30.985341][  T473]  ? addrconf_sysctl_proxy_ndp (net/ipv6/addrconf.c:6504)
[   30.985346][  T473]  addrconf_fixup_forwarding (net/ipv6/addrconf.c:868 net/ipv6/addrconf.c:904)
[   30.985350][  T473]  addrconf_sysctl_forward (net/ipv6/addrconf.c:6373)
[   30.985353][  T473]  ? addrconf_fixup_forwarding (net/ipv6/addrconf.c:906)
[   30.985356][  T473]  ? addrconf_fixup_forwarding (net/ipv6/addrconf.c:906)
[   30.985363][  T473]  ? __kvmalloc_node_noprof (mm/slub.c:5297 mm/slub.c:6833)
[   30.985367][  T473]  ? proc_sys_call_handler (fs/proc/proc_sysctl.c:583 (discriminator 7))
[   30.985371][  T473]  proc_sys_call_handler (fs/proc/proc_sysctl.c:600)
[   30.985374][  T473]  ? proc_sys_lookup (fs/proc/proc_sysctl.c:543 (discriminator 3))
[   30.985377][  T473]  ? do_fault_around (./include/linux/rcupdate.h:871 mm/memory.c:5870)
[   30.985380][  T473]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   30.985383][  T473]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4040 (discriminator 3) kernel/rcu/tree.c:4032 (discriminator 3))
[   30.985386][  T473]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   30.985389][  T473]  ? proc_sys_call_handler (fs/proc/proc_sysctl.c:591)
[   30.985392][  T473]  new_sync_write (fs/read_write.c:595)
[   30.985395][  T473]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   30.985397][  T473]  ? new_sync_read (./include/linux/ioprio.h:41)
[   30.985400][  T473]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[   30.985402][  T473]  ? ksys_write (fs/read_write.c:740)
[   30.985406][  T473]  vfs_write (fs/read_write.c:688)
[   30.985409][  T473]  ksys_write (fs/read_write.c:740)
[   30.985412][  T473]  ? __ia32_sys_read (fs/read_write.c:724)
[   30.985414][  T473]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   30.985416][  T473]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   30.985419][  T473]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   30.985422][  T473]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[   30.985425][  T473]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[   30.985428][  T473]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   30.985431][  T473] RIP: 0033:0x7f9ad780408e
[   30.985434][  T473] Code: 4d 89 d8 e8 94 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 94 bd 00 00       	call   0xbd9c
   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
[   30.985437][  T473] RSP: 002b:00007ffdc042d6c0 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
[   30.985441][  T473] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f9ad780408e
[   30.985443][  T473] RDX: 0000000000000002 RSI: 0000557c247224b0 RDI: 0000000000000005
[   30.985444][  T473] RBP: 00007ffdc042d6d0 R08: 0000000000000000 R09: 0000000000000000
[   30.985446][  T473] R10: 0000000000000000 R11: 0000000000000202 R12: 0000557c247245e0


Finger prints:
mark_lock_irq:mark_lock:mark_usage:__lock_acquire:_raw_spin_lock