======================================
| [ 44.743606][ C1] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
| [   44.743834][    C1]
| [   44.743921][    C1]
| [   44.743921][    C1] stack backtrace:
[   44.744486][    C1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   44.744985][    C1] Call Trace:
[   44.745121][    C1]  <IRQ>
[ 44.745212][ C1] dump_stack_lvl (lib/dump_stack.c:117) 
[ 44.745394][ C1] print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 44.745612][ C1] ? __pfx_print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 44.745940][ C1] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) 
[ 44.746221][ C1] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) 
[ 44.746397][ C1] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 44.746579][ C1] mark_lock_irq (kernel/locking/lockdep.c:4244) 
[ 44.746758][ C1] ? __pfx_mark_lock_irq (kernel/locking/lockdep.c:4207) 
[ 44.747058][ C1] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 44.747235][ C1] ? save_trace (kernel/locking/lockdep.c:586) 
[ 44.747408][ C1] mark_lock (kernel/locking/lockdep.c:4678) 
[ 44.747542][ C1] mark_usage (kernel/locking/lockdep.c:4567) 
[ 44.747774][ C1] __lock_acquire (kernel/locking/lockdep.c:5091) 
[ 44.747950][ C1] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 44.748119][ C1] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934) 
[ 44.748392][ C1] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 44.748574][ C1] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 44.748856][ C1] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934) 
[ 44.749029][ C1] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 44.749200][ C1] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934) 
[ 44.749374][ C1] _raw_read_lock_bh (./include/linux/rwlock_api_smp.h:177 kernel/locking/spinlock.c:252) 
[ 44.749549][ C1] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934) 
[ 44.749726][ C1] ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934) 
[ 44.749894][ C1] ndisc_send_ns (net/ipv6/ndisc.c:658) 
[ 44.750067][ C1] ? __pfx_ndisc_send_ns (net/ipv6/ndisc.c:653) 
[ 44.750238][ C1] ? __ipv6_chk_addr_and_flags (net/ipv6/addrconf.c:2009) 
[ 44.750559][ C1] ndisc_solicit (net/ipv6/ndisc.c:736) 
[ 44.750732][ C1] ? __pfx_ndisc_solicit (net/ipv6/ndisc.c:736) 
[ 44.750905][ C1] ? neigh_probe (net/core/neighbour.c:1074) 
[ 44.751080][ C1] neigh_probe (net/core/neighbour.c:1075) 
[ 44.751313][ C1] neigh_timer_handler (net/core/neighbour.c:1163) 
[ 44.751487][ C1] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 44.751661][ C1] ? __pfx_neigh_timer_handler (net/core/neighbour.c:1083) 
[ 44.751936][ C1] call_timer_fn (kernel/time/timer.c:1793) 
[ 44.752112][ C1] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 44.752290][ C1] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 44.752457][ C1] ? __pfx_call_timer_fn (kernel/time/timer.c:1770) 
[ 44.752763][ C1] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 44.752933][ C1] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[ 44.753104][ C1] __run_timers (kernel/time/timer.c:1845 kernel/time/timer.c:2418) 
[ 44.753272][ C1] ? __pfx_neigh_timer_handler (net/core/neighbour.c:1083) 
[ 44.753443][ C1] ? __pfx___run_timers (kernel/time/timer.c:2389) 
[ 44.753613][ C1] ? do_raw_spin_lock (./arch/x86/include/asm/atomic.h:115 ./include/linux/atomic/atomic-arch-fallback.h:2170 ./include/linux/atomic/atomic-instrumented.h:1302 ./include/asm-generic/qspinlock.h:111 kernel/locking/spinlock_debug.c:116) 
[ 44.753877][ C1] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 44.754040][ C1] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 44.754213][ C1] ? run_timer_softirq (kernel/time/timer.c:2429 kernel/time/timer.c:2422 kernel/time/timer.c:2438 kernel/time/timer.c:2448) 
[ 44.754381][ C1] run_timer_softirq (kernel/time/timer.c:2430 kernel/time/timer.c:2422 kernel/time/timer.c:2438 kernel/time/timer.c:2448) 
[ 44.754660][ C1] __do_softirq (kernel/softirq.c:554) 
[ 44.754830][ C1] irq_exit_rcu (kernel/softirq.c:428 kernel/softirq.c:633 kernel/softirq.c:645) 
[ 44.754960][ C1] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1043 arch/x86/kernel/apic/apic.c:1043) 
[   44.755130][    C1]  </IRQ>
[   44.755217][    C1]  <TASK>
[ 44.755303][ C1] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 44.755513][ C1] RIP: 0010:_raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 44.755732][ C1] Code: 10 e8 21 49 9b fd 48 89 ef e8 59 b9 9b fd 81 e3 00 02 00 00 75 1d 9c 58 f6 c4 02 75 29 48 85 db 74 01 fb 65 ff 0d 05 bf 2f 52 <74> 0e 5b 5d c3 cc cc cc cc e8 4f b3 be fd eb dc 0f 1f 44 00 00 5b
All code
========
   0:	10 e8                	adc    %ch,%al
   2:	21 49 9b             	and    %ecx,-0x65(%rcx)
   5:	fd                   	std
   6:	48 89 ef             	mov    %rbp,%rdi
   9:	e8 59 b9 9b fd       	call   0xfffffffffd9bb967
   e:	81 e3 00 02 00 00    	and    $0x200,%ebx
  14:	75 1d                	jne    0x33
  16:	9c                   	pushf
  17:	58                   	pop    %rax
  18:	f6 c4 02             	test   $0x2,%ah
  1b:	75 29                	jne    0x46
  1d:	48 85 db             	test   %rbx,%rbx
  20:	74 01                	je     0x23
  22:	fb                   	sti
  23:	65 ff 0d 05 bf 2f 52 	decl   %gs:0x522fbf05(%rip)        # 0x522fbf2f
  2a:*	74 0e                	je     0x3a		<-- trapping instruction
  2c:	5b                   	pop    %rbx
  2d:	5d                   	pop    %rbp
  2e:	c3                   	ret
  2f:	cc                   	int3
  30:	cc                   	int3
  31:	cc                   	int3
  32:	cc                   	int3
  33:	e8 4f b3 be fd       	call   0xfffffffffdbeb387
  38:	eb dc                	jmp    0x16
  3a:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  3f:	5b                   	pop    %rbx

Code starting with the faulting instruction
===========================================
   0:	74 0e                	je     0x10
   2:	5b                   	pop    %rbx
   3:	5d                   	pop    %rbp
   4:	c3                   	ret
   5:	cc                   	int3
   6:	cc                   	int3
   7:	cc                   	int3
   8:	cc                   	int3
   9:	e8 4f b3 be fd       	call   0xfffffffffdbeb35d
   e:	eb dc                	jmp    0xffffffffffffffec
  10:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  15:	5b                   	pop    %rbx
[   44.756435][    C1] RSP: 0018:ffffc9000071f768 EFLAGS: 00000246
[   44.756765][    C1] RAX: 0000000000000002 RBX: 0000000000000200 RCX: 1ffffffff61e5955
[   44.757021][    C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffadd40911
[   44.757272][    C1] RBP: ffff88800104f440 R08: 0000000000000001 R09: fffffbfff61e38a9
[   44.757525][    C1] R10: ffffffffb0f1c54f R11: 0000000000000008 R12: ffff8880043c0788
[   44.757827][    C1] R13: 0000000000000000 R14: ffffc9000071f7b8 R15: ffff888002bfe288
[ 44.758082][ C1] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 44.758393][ C1] qlist_free_all (mm/kasan/quarantine.c:174) 
[ 44.758568][ C1] ? p9_fcall_init (net/9p/client.c:232) 
[ 44.758742][ C1] kasan_quarantine_reduce (./include/linux/srcu.h:285 mm/kasan/quarantine.c:287) 
[ 44.758915][ C1] __kasan_slab_alloc (mm/kasan/common.c:322) 
[ 44.759094][ C1] __kmalloc (mm/slub.c:3799 mm/slub.c:3845 mm/slub.c:3965 mm/slub.c:3979) 
[ 44.759226][ C1] p9_fcall_init (net/9p/client.c:232) 
[ 44.759504][ C1] p9_tag_alloc (net/9p/client.c:297) 
[ 44.759674][ C1] ? __pfx_p9_tag_alloc (net/9p/client.c:277) 
[ 44.759845][ C1] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 44.760020][ C1] ? stack_depot_save_flags (lib/stackdepot.c:609) 
[ 44.760297][ C1] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 44.760466][ C1] p9_client_prepare_req (net/9p/client.c:641) 
[ 44.760632][ C1] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 44.760800][ C1] ? __kasan_kmalloc (mm/kasan/common.c:391) 
[ 44.761169][ C1] ? __pfx_p9_client_prepare_req (net/9p/client.c:625) 
[ 44.761378][ C1] ? vfs_fstat (./include/linux/file.h:47 fs/stat.c:199) 
[ 44.761514][ C1] p9_client_rpc (net/9p/client.c:688 (discriminator 4)) 
[ 44.761677][ C1] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 44.761843][ C1] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 44.762107][ C1] ? __pfx_p9_client_rpc (net/9p/client.c:672) 
[ 44.762268][ C1] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 44.762435][ C1] ? __create_object (mm/kmemleak.c:756) 
[ 44.762616][ C1] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 44.762901][ C1] p9_client_getattr_dotl (net/9p/client.c:1732) 
[ 44.763068][ C1] v9fs_vfs_getattr_dotl (fs/9p/vfs_inode_dotl.c:396) 
[ 44.763234][ C1] ovl_getattr (fs/overlayfs/overlayfs.h:416 fs/overlayfs/inode.c:174) 
[ 44.763404][ C1] ? __pfx_ovl_getattr (fs/overlayfs/inode.c:159) 
[ 44.763674][ C1] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 44.763842][ C1] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 44.764007][ C1] ? __might_fault (mm/memory.c:6216 mm/memory.c:6209) 
[ 44.764173][ C1] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 44.764338][ C1] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 44.764502][ C1] ? __might_fault (mm/memory.c:6216 mm/memory.c:6209) 
[ 44.764667][ C1] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 44.764833][ C1] ? __might_fault (mm/memory.c:6216 mm/memory.c:6209) 
[ 44.765004][ C1] ? vfs_getattr_nosec (fs/stat.c:112) 
[ 44.765172][ C1] vfs_fstat (./include/linux/file.h:47 fs/stat.c:199) 
[ 44.765297][ C1] __do_sys_newfstatat (fs/stat.c:469) 
[ 44.765461][ C1] ? __pfx___do_sys_newfstatat (fs/stat.c:464) 
[ 44.765632][ C1] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 44.765838][ C1] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 44.766005][ C1] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[   44.766208][    C1] RIP: 0033:0x7f019ef41eae
[ 44.766384][ C1] Code: 48 89 f2 b9 00 01 00 00 48 89 fe bf 9c ff ff ff e9 07 00 00 00 0f 1f 80 00 00 00 00 f3 0f 1e fa 41 89 ca b8 06 01 00 00 0f 05 <3d> 00 f0 ff ff 77 0b 31 c0 c3 0f 1f 84 00 00 00 00 00 f7 d8 89 05
All code
========
   0:	48 89 f2             	mov    %rsi,%rdx
   3:	b9 00 01 00 00       	mov    $0x100,%ecx
   8:	48 89 fe             	mov    %rdi,%rsi
   b:	bf 9c ff ff ff       	mov    $0xffffff9c,%edi
  10:	e9 07 00 00 00       	jmp    0x1c
  15:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  1c:	f3 0f 1e fa          	endbr64
  20:	41 89 ca             	mov    %ecx,%r10d
  23:	b8 06 01 00 00       	mov    $0x106,%eax
  28:	0f 05                	syscall
  2a:*	3d 00 f0 ff ff       	cmp    $0xfffff000,%eax		<-- trapping instruction
  2f:	77 0b                	ja     0x3c
  31:	31 c0                	xor    %eax,%eax
  33:	c3                   	ret
  34:	0f 1f 84 00 00 00 00 	nopl   0x0(%rax,%rax,1)
  3b:	00 
  3c:	f7 d8                	neg    %eax
  3e:	89                   	.byte 0x89
  3f:	05                   	.byte 0x5

Code starting with the faulting instruction
===========================================
   0:	3d 00 f0 ff ff       	cmp    $0xfffff000,%eax
   5:	77 0b                	ja     0x12
   7:	31 c0                	xor    %eax,%eax
   9:	c3                   	ret
   a:	0f 1f 84 00 00 00 00 	nopl   0x0(%rax,%rax,1)
  11:	00 
  12:	f7 d8                	neg    %eax
  14:	89                   	.byte 0x89
  15:	05                   	.byte 0x5
[   44.767076][    C1] RSP: 002b:00007ffc5c2983c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000106
[   44.767328][    C1] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f019ef41eae
[   44.767572][    C1] RDX: 00007ffc5c298460 RSI: 00007f019ef45cfb RDI: 0000000000000005
[   44.767816][    C1] RBP: 00007ffc5c298520 R08: 00007f019ef14820 R09: 00007f019ef51220
[   44.768060][    C1] R10: 0000000000001000 R11: 0000000000000206 R12: 00007f019ef51220


Finger prints:
dump_stack_lvl:mark_lock_irq:mark_lock:mark_usage