======================================
| [ 45.402209][ C3] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
| [   45.402395][    C3]
| [   45.402564][    C3]
| [   45.402564][    C3] stack backtrace:
[   45.402974][    C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   45.403403][    C3] Call Trace:
[   45.403519][    C3]  <IRQ>
[ 45.403599][ C3] dump_stack_lvl (lib/dump_stack.c:117) 
[ 45.403840][ C3] print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 45.404029][ C3] ? __pfx_print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 45.404220][ C3] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) 
[ 45.404365][ C3] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) 
[ 45.404609][ C3] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 45.404768][ C3] mark_lock_irq (kernel/locking/lockdep.c:4244) 
[ 45.404923][ C3] ? __pfx_mark_lock_irq (kernel/locking/lockdep.c:4207) 
[ 45.405073][ C3] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 45.405310][ C3] ? save_trace (kernel/locking/lockdep.c:586) 
[ 45.405463][ C3] mark_lock (kernel/locking/lockdep.c:4678) 
[ 45.405671][ C3] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) 
[ 45.405818][ C3] mark_usage (kernel/locking/lockdep.c:4567) 
[ 45.405942][ C3] __lock_acquire (kernel/locking/lockdep.c:5091) 
[ 45.406096][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5137) 
[ 45.406245][ C3] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) bridge
[ 45.406604][ C3] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 45.406754][ C3] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge
[ 45.406978][ C3] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 45.407130][ C3] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 45.407289][ C3] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge
[ 45.407593][ C3] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 45.407750][ C3] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge
[ 45.407964][ C3] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 45.408107][ C3] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge
[ 45.408405][ C3] br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge
[ 45.408623][ C3] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) bridge
[ 45.408875][ C3] call_timer_fn (kernel/time/timer.c:1793) 
[ 45.409115][ C3] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 45.409259][ C3] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 45.409404][ C3] ? __pfx_call_timer_fn (kernel/time/timer.c:1770) 
[ 45.409549][ C3] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 45.409697][ C3] __run_timers (kernel/time/timer.c:1845 kernel/time/timer.c:2418) 
[ 45.409839][ C3] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) bridge
[ 45.410088][ C3] ? __pfx___run_timers (kernel/time/timer.c:2389) 
[ 45.410231][ C3] ? 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) 
[ 45.410461][ C3] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 45.410607][ C3] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 45.410754][ C3] ? run_timer_softirq (kernel/time/timer.c:2429 kernel/time/timer.c:2422 kernel/time/timer.c:2438 kernel/time/timer.c:2448) 
[ 45.410899][ C3] run_timer_softirq (kernel/time/timer.c:2430 kernel/time/timer.c:2422 kernel/time/timer.c:2438 kernel/time/timer.c:2448) 
[ 45.411041][ C3] __do_softirq (kernel/softirq.c:554) 
[ 45.411282][ C3] irq_exit_rcu (kernel/softirq.c:428 kernel/softirq.c:633 kernel/softirq.c:645) 
[ 45.411391][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1043 arch/x86/kernel/apic/apic.c:1043) 
[   45.411534][    C3]  </IRQ>
[   45.411610][    C3]  <TASK>
[ 45.411682][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 45.411860][ C3] RIP: 0010:_raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 45.412061][ C3] 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 8f 51 <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 8f 51 	decl   %gs:0x518fbf05(%rip)        # 0x518fbf2f
  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
[   45.412696][    C3] RSP: 0018:ffffc900006ef7c8 EFLAGS: 00000286
[   45.412891][    C3] RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff6064179
[   45.413120][    C3] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffae740911
[   45.413442][    C3] RBP: ffff888005442008 R08: 0000000000000001 R09: fffffbfff60649fa
[   45.413676][    C3] R10: ffffffffb0324fd7 R11: 0000000000000000 R12: dffffc0000000000
[   45.413899][    C3] R13: 0000000000000001 R14: 0000000000000282 R15: ffff888005442078
[ 45.414221][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 45.414403][ C3] p9_virtio_request (net/9p/trans_virtio.c:305) 
[ 45.414557][ C3] ? trace_9p_client_req (./include/trace/events/9p.h:124 (discriminator 52)) 
[ 45.414807][ C3] ? __pfx_p9_virtio_request (net/9p/trans_virtio.c:256) 
[ 45.414956][ C3] ? p9_client_prepare_req (net/9p/client.c:625) 
[ 45.415109][ C3] ? __kasan_kmalloc (mm/kasan/common.c:391) 
[ 45.415260][ C3] ? __pfx_p9_client_prepare_req (net/9p/client.c:625) 
[ 45.415540][ C3] ? vfs_statx (fs/stat.c:251) 
[ 45.415692][ C3] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[ 45.415883][ C3] p9_client_rpc (net/9p/client.c:703) 
[ 45.416027][ C3] ? __create_object (mm/kmemleak.c:756) 
[ 45.416287][ C3] ? __pfx_p9_client_rpc (net/9p/client.c:672) 
[ 45.416437][ C3] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 45.416594][ C3] ? __create_object (mm/kmemleak.c:756) 
[ 45.416745][ C3] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 45.417006][ C3] p9_client_getattr_dotl (net/9p/client.c:1732) 
[ 45.417157][ C3] v9fs_vfs_getattr_dotl (fs/9p/vfs_inode_dotl.c:396) 
[ 45.417308][ C3] ovl_getattr (fs/overlayfs/overlayfs.h:416 fs/overlayfs/inode.c:174) 
[ 45.417463][ C3] ? __pfx_ovl_getattr (fs/overlayfs/inode.c:159) 
[ 45.417624][ C3] ? __pfx_kfree_link (fs/libfs.c:1573) 
[ 45.417775][ C3] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 45.417925][ C3] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 45.418171][ C3] ? __might_fault (mm/memory.c:6216 mm/memory.c:6209) 
[ 45.418318][ C3] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 45.418471][ C3] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 45.418624][ C3] ? vfs_getattr_nosec (fs/stat.c:112) 
[ 45.418775][ C3] vfs_statx (fs/stat.c:251) 
[ 45.418892][ C3] ? __pfx_vfs_statx (fs/stat.c:234) 
[ 45.419041][ C3] ? getname_flags (./arch/x86/include/asm/atomic.h:28 ./include/linux/atomic/atomic-arch-fallback.h:503 ./include/linux/atomic/atomic-instrumented.h:68 fs/namei.c:190) 
[ 45.419189][ C3] vfs_fstatat (fs/stat.c:305) 
[ 45.419399][ C3] __do_sys_newfstatat (fs/stat.c:469) 
[ 45.419551][ C3] ? __pfx___do_sys_newfstatat (fs/stat.c:464) 
[ 45.419708][ C3] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 45.419902][ C3] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 45.420150][ C3] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[   45.420335][    C3] RIP: 0033:0x7f2e751bceee
[ 45.420486][ C3] 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 48 8b 15 d9
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:	48                   	rex.W
  3d:	8b                   	.byte 0x8b
  3e:	15                   	.byte 0x15
  3f:	d9                   	.byte 0xd9

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:	48                   	rex.W
  13:	8b                   	.byte 0x8b
  14:	15                   	.byte 0x15
  15:	d9                   	.byte 0xd9
[   45.421008][    C3] RSP: 002b:00007fff77b6e538 EFLAGS: 00000246 ORIG_RAX: 0000000000000106
[   45.421350][    C3] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f2e751bceee
[   45.421570][    C3] RDX: 00007fff77b6e540 RSI: 0000564da2b1cc60 RDI: 00000000ffffff9c
[   45.421793][    C3] RBP: 0000564da2b1cc60 R08: 00007fff77b6e748 R09: 0000564da2b1cad2
[   45.422023][    C3] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003


Finger prints:
dump_stack_lvl:mark_lock_irq:mark_lock:mark_usage