======================================
| [   91.069960][  T520]    entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
| [   91.070076][  T520]
| [   91.070120][  T520]
| [   91.070120][  T520] stack backtrace:
[   91.070237][  T520] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   91.070239][  T520] Call Trace:
[   91.070240][  T520]  <TASK>
[   91.070241][  T520]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   91.070246][  T520]  print_irq_inversion_bug.part.0.cold (kernel/locking/lockdep.c:4125)
[   91.070250][  T520]  mark_lock_irq (kernel/locking/lockdep.c:4079 kernel/locking/lockdep.c:4158 kernel/locking/lockdep.c:4294)
[   91.070253][  T520]  mark_lock (kernel/locking/lockdep.c:4753)
[   91.070254][  T520]  mark_usage (kernel/locking/lockdep.c:4666)
[   91.070256][  T520]  __lock_acquire (kernel/locking/lockdep.c:5191)
[   91.070258][  T520]  lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[   91.070259][  T520]  ? __ipv6_dev_ac_dec (./include/linux/spinlock.h:342 net/ipv6/anycast.c:253 net/ipv6/anycast.c:419)
[   91.070261][  T520]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   91.070264][  T520]  ? do_raw_read_unlock (kernel/locking/spinlock_debug.c:180)
[   91.070266][  T520]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[   91.070268][  T520]  _raw_spin_lock (./include/linux/spinlock_api_smp.h:158 (discriminator 1) kernel/locking/spinlock.c:158 (discriminator 1))
[   91.070269][  T520]  ? __ipv6_dev_ac_dec (./include/linux/spinlock.h:342 net/ipv6/anycast.c:253 net/ipv6/anycast.c:419)
[   91.070271][  T520]  __ipv6_dev_ac_dec (./include/linux/spinlock.h:342 net/ipv6/anycast.c:253 net/ipv6/anycast.c:419)
[   91.070273][  T520]  addrconf_leave_anycast (net/ipv6/addrconf.c:2289)
[   91.070275][  T520]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   91.070278][  T520]  ? __ipv6_isatap_ifid (net/ipv6/addrconf.c:2360)
[   91.070279][  T520]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[   91.070281][  T520]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   91.070283][  T520]  dev_forward_change (net/ipv6/addrconf.c:844)
[   91.070285][  T520]  ? addrconf_fixup_forwarding (./include/linux/rtnetlink.h:140 net/ipv6/addrconf.c:878)
[   91.070287][  T520]  ? addrconf_sysctl_proxy_ndp (net/ipv6/addrconf.c:6504)
[   91.070290][  T520]  addrconf_fixup_forwarding (net/ipv6/addrconf.c:868 net/ipv6/addrconf.c:904)
[   91.070292][  T520]  addrconf_sysctl_forward (net/ipv6/addrconf.c:6373)
[   91.070295][  T520]  ? addrconf_fixup_forwarding (net/ipv6/addrconf.c:906)
[   91.070297][  T520]  ? addrconf_fixup_forwarding (net/ipv6/addrconf.c:906)
[   91.070299][  T520]  ? __kvmalloc_node_noprof (mm/slub.c:5297 mm/slub.c:6833)
[   91.070302][  T520]  ? proc_sys_call_handler (fs/proc/proc_sysctl.c:583 (discriminator 7))
[   91.070305][  T520]  proc_sys_call_handler (fs/proc/proc_sysctl.c:600)
[   91.070307][  T520]  ? proc_sys_lookup (fs/proc/proc_sysctl.c:543 (discriminator 3))
[   91.070309][  T520]  ? rcu_read_unlock (./include/linux/rcupdate.h:867 (discriminator 5))
[   91.070311][  T520]  ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[   91.070313][  T520]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4040 (discriminator 3) kernel/rcu/tree.c:4032 (discriminator 3))
[   91.070315][  T520]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   91.070317][  T520]  ? proc_sys_call_handler (fs/proc/proc_sysctl.c:591)
[   91.070319][  T520]  new_sync_write (fs/read_write.c:595)
[   91.070320][  T520]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   91.070322][  T520]  ? new_sync_read (./include/linux/ioprio.h:41)
[   91.070323][  T520]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[   91.070325][  T520]  ? ksys_write (fs/read_write.c:740)
[   91.070327][  T520]  vfs_write (fs/read_write.c:688)
[   91.070329][  T520]  ksys_write (fs/read_write.c:740)
[   91.070330][  T520]  ? __ia32_sys_read (fs/read_write.c:724)
[   91.070332][  T520]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   91.070333][  T520]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   91.070335][  T520]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   91.070336][  T520]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[   91.070339][  T520]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[   91.070341][  T520]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   91.070343][  T520] RIP: 0033:0x7fed8ccf508e
[   91.070346][  T520] 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
[   91.070347][  T520] RSP: 002b:00007ffe84864910 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
[   91.070350][  T520] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fed8ccf508e
[   91.070352][  T520] RDX: 0000000000000002 RSI: 000055ed62f674b0 RDI: 0000000000000005
[   91.070352][  T520] RBP: 00007ffe84864920 R08: 0000000000000000 R09: 0000000000000000
[   91.070353][  T520] R10: 0000000000000000 R11: 0000000000000202 R12: 000055ed62f695e0


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