======================================
| [ 44.911272][ C0] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
| [   44.911561][    C0]
| [   44.911681][    C0]
| [   44.911681][    C0] stack backtrace:
[   44.912479][    C0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   44.912999][    C0] Call Trace:
[   44.913186][    C0]  <IRQ>
[ 44.913306][ C0] dump_stack_lvl (lib/dump_stack.c:117) 
[ 44.913548][ C0] print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 44.913826][ C0] ? __pfx_print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 44.914110][ C0] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) 
[ 44.914335][ C0] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) 
[ 44.914566][ C0] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 44.914809][ C0] mark_lock_irq (kernel/locking/lockdep.c:4244) 
[ 44.915054][ C0] ? __pfx_mark_lock_irq (kernel/locking/lockdep.c:4207) 
[ 44.915452][ C0] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 44.915680][ C0] ? add_chain_cache (kernel/locking/lockdep.c:3730) 
[ 44.915910][ C0] ? save_trace (kernel/locking/lockdep.c:586) 
[ 44.916140][ C0] mark_lock (kernel/locking/lockdep.c:4678) 
[ 44.916312][ C0] mark_usage (kernel/locking/lockdep.c:4567) 
[ 44.916483][ C0] __lock_acquire (kernel/locking/lockdep.c:5091) 
[ 44.916712][ C0] ? __lock_acquire (kernel/locking/lockdep.c:5137) 
[ 44.916947][ C0] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) bridge
[ 44.917356][ C0] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 44.917584][ C0] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge
[ 44.917927][ C0] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 44.918153][ C0] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 44.918533][ C0] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge
[ 44.918879][ C0] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 44.919103][ C0] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge
[ 44.919444][ C0] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 44.919823][ C0] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge
[ 44.920166][ C0] br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge
[ 44.920514][ C0] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) bridge
[ 44.921254][ C0] call_timer_fn (kernel/time/timer.c:1793) 
[ 44.921490][ C0] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 44.921722][ C0] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 44.921969][ C0] ? __pfx_call_timer_fn (kernel/time/timer.c:1770) 
[ 44.922201][ C0] ? 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) 
[ 44.922444][ C0] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[ 44.922687][ C0] __run_timers (kernel/time/timer.c:1845 kernel/time/timer.c:2418) 
[ 44.922925][ C0] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) bridge
[ 44.923353][ C0] ? __pfx___run_timers (kernel/time/timer.c:2389) 
[ 44.923582][ C0] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 44.923817][ C0] ? 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) 
[ 44.924062][ C0] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 44.924451][ C0] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 44.924686][ C0] ? timer_expire_remote (kernel/time/timer.c:2429 kernel/time/timer.c:2422 kernel/time/timer.c:2181) 
[ 44.924923][ C0] timer_expire_remote (kernel/time/timer.c:2430 kernel/time/timer.c:2422 kernel/time/timer.c:2181) 
[ 44.925162][ C0] tmigr_handle_remote_cpu (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:67 ./arch/x86/include/asm/irqflags.h:127 kernel/time/timer_migration.c:925) 
[ 44.925392][ C0] ? __pfx_tmigr_handle_remote_cpu (kernel/time/timer_migration.c:869) 
[ 44.925848][ C0] ? 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) 
[ 44.926082][ C0] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) 
[ 44.926269][ C0] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[ 44.926499][ C0] tmigr_handle_remote_up (kernel/time/timer_migration.c:1003) 
[ 44.926878][ C0] tmigr_handle_remote (kernel/time/timer_migration.c:488 kernel/time/timer_migration.c:1061) 
[ 44.927027][ C0] ? 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) 
[ 44.927173][ C0] ? __pfx_tmigr_handle_remote (kernel/time/timer_migration.c:1026) 
[ 44.927321][ C0] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4292 kernel/locking/lockdep.c:4359) 
[ 44.927594][ C0] __do_softirq (kernel/softirq.c:554) 
[ 44.927742][ C0] irq_exit_rcu (kernel/softirq.c:428 kernel/softirq.c:633 kernel/softirq.c:645) 
[ 44.927858][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1043 arch/x86/kernel/apic/apic.c:1043) 
[   44.928004][    C0]  </IRQ>
[   44.928081][    C0]  <TASK>
[ 44.928245][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 44.928428][ C0] RIP: 0010:_raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:160 kernel/locking/spinlock.c:202) 
[ 44.928618][ C0] Code: 44 00 00 55 48 8b 74 24 08 48 89 fd 48 83 c7 18 e8 75 39 9b fd 48 89 ef e8 ad a9 9b fd e8 c8 a3 be fd fb 65 ff 0d 68 af af 49 <74> 06 5d c3 cc cc cc cc 0f 1f 44 00 00 5d c3 cc cc cc cc 66 66 2e
All code
========
   0:	44 00 00             	add    %r8b,(%rax)
   3:	55                   	push   %rbp
   4:	48 8b 74 24 08       	mov    0x8(%rsp),%rsi
   9:	48 89 fd             	mov    %rdi,%rbp
   c:	48 83 c7 18          	add    $0x18,%rdi
  10:	e8 75 39 9b fd       	call   0xfffffffffd9b398a
  15:	48 89 ef             	mov    %rbp,%rdi
  18:	e8 ad a9 9b fd       	call   0xfffffffffd9ba9ca
  1d:	e8 c8 a3 be fd       	call   0xfffffffffdbea3ea
  22:	fb                   	sti
  23:	65 ff 0d 68 af af 49 	decl   %gs:0x49afaf68(%rip)        # 0x49afaf92
  2a:*	74 06                	je     0x32		<-- trapping instruction
  2c:	5d                   	pop    %rbp
  2d:	c3                   	ret
  2e:	cc                   	int3
  2f:	cc                   	int3
  30:	cc                   	int3
  31:	cc                   	int3
  32:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  37:	5d                   	pop    %rbp
  38:	c3                   	ret
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	cc                   	int3
  3c:	cc                   	int3
  3d:	66                   	data16
  3e:	66                   	data16
  3f:	2e                   	cs

Code starting with the faulting instruction
===========================================
   0:	74 06                	je     0x8
   2:	5d                   	pop    %rbp
   3:	c3                   	ret
   4:	cc                   	int3
   5:	cc                   	int3
   6:	cc                   	int3
   7:	cc                   	int3
   8:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
   d:	5d                   	pop    %rbp
   e:	c3                   	ret
   f:	cc                   	int3
  10:	cc                   	int3
  11:	cc                   	int3
  12:	cc                   	int3
  13:	66                   	data16
  14:	66                   	data16
  15:	2e                   	cs
[   44.929236][    C0] RSP: 0018:ffffc900006cf878 EFLAGS: 00000282
[   44.929434][    C0] RAX: 0000000000008a57 RBX: 1ffff920000d9f14 RCX: 1ffffffff72e4856
[   44.929751][    C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffb6541898
[   44.929971][    C0] RBP: ffff888005b5a000 R08: 0000000000000001 R09: fffffbfff72e3ca5
[   44.930191][    C0] R10: ffffffffb971e52f R11: ffffc900006cf3c1 R12: ffff8880063f6e80
[   44.930511][    C0] R13: 0000000000000000 R14: ffff8880063f6e78 R15: 0000000000000000
[ 44.930734][ C0] ? _raw_spin_unlock_irq (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:77 ./include/linux/spinlock_api_smp.h:159 kernel/locking/spinlock.c:202) 
[ 44.930882][ C0] ? _raw_spin_unlock_irq (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:77 ./include/linux/spinlock_api_smp.h:159 kernel/locking/spinlock.c:202) 
[ 44.931029][ C0] p9_tag_alloc (./include/linux/local_lock_internal.h:36 ./include/linux/idr.h:174 net/9p/client.c:321) 
[ 44.931276][ C0] ? __pfx_p9_tag_alloc (net/9p/client.c:277) 
[ 44.931422][ C0] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 44.931570][ C0] ? stack_depot_save_flags (lib/stackdepot.c:609) 
[ 44.931719][ C0] ? 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) 
[ 44.931865][ C0] p9_client_prepare_req (net/9p/client.c:641) 
[ 44.932012][ C0] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 44.932199][ C0] ? __kasan_kmalloc (mm/kasan/common.c:391) 
[ 44.932356][ C0] ? __pfx_p9_client_prepare_req (net/9p/client.c:625) 
[ 44.932555][ C0] ? vfs_fstat (./include/linux/file.h:47 fs/stat.c:199) 
[ 44.932680][ C0] p9_client_rpc (net/9p/client.c:688 (discriminator 4)) 
[ 44.932841][ C0] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 44.933005][ C0] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 44.933254][ C0] ? __pfx_p9_client_rpc (net/9p/client.c:672) 
[ 44.933415][ C0] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 44.933576][ C0] ? __create_object (mm/kmemleak.c:756) 
[ 44.933737][ C0] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 44.933899][ C0] p9_client_getattr_dotl (net/9p/client.c:1732) 
[ 44.934147][ C0] v9fs_vfs_getattr_dotl (fs/9p/vfs_inode_dotl.c:396) 
[ 44.934309][ C0] ovl_getattr (fs/overlayfs/overlayfs.h:416 fs/overlayfs/inode.c:174) 
[ 44.934473][ C0] ? __pfx_ovl_getattr (fs/overlayfs/inode.c:159) 
[ 44.934638][ C0] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 44.934973][ C0] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 44.935131][ C0] ? __might_fault (mm/memory.c:6216 mm/memory.c:6209) 
[ 44.935288][ C0] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 44.935447][ C0] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 44.935691][ C0] ? __might_fault (mm/memory.c:6216 mm/memory.c:6209) 
[ 44.935848][ C0] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 44.936005][ C0] ? __might_fault (mm/memory.c:6216 mm/memory.c:6209) 
[ 44.936162][ C0] ? vfs_getattr_nosec (fs/stat.c:112) 
[ 44.936409][ C0] vfs_fstat (./include/linux/file.h:47 fs/stat.c:199) 
[ 44.936529][ C0] __do_sys_newfstatat (fs/stat.c:469) 
[ 44.936686][ C0] ? __pfx___do_sys_newfstatat (fs/stat.c:464) 
[ 44.936863][ C0] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 44.937059][ C0] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 44.937313][ C0] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[   44.937513][    C0] RIP: 0033:0x7fc6b69e7eae
[ 44.937675][ C0] 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
[   44.938226][    C0] RSP: 002b:00007ffd43d0ab58 EFLAGS: 00000206 ORIG_RAX: 0000000000000106
[   44.938465][    C0] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc6b69e7eae
[   44.938705][    C0] RDX: 00007ffd43d0abf0 RSI: 00007fc6b69ebcfb RDI: 0000000000000005
[   44.938936][    C0] RBP: 00007ffd43d0acb0 R08: 00007fc6b69ba850 R09: 00007fc6b69b9940
[   44.939170][    C0] R10: 0000000000001000 R11: 0000000000000206 R12: 00007fc6b69b9940


Finger prints:
dump_stack_lvl:mark_lock_irq:mark_lock:mark_usage