======================================
| [ 293.210168][ C1] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
| [  293.210361][    C1]
| [  293.210441][    C1]
| [  293.210441][    C1] stack backtrace:
[  293.210967][    C1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  293.211308][    C1] Call Trace:
[  293.211439][    C1]  <IRQ>
[ 293.211521][ C1] dump_stack_lvl (lib/dump_stack.c:117) 
[ 293.211777][ C1] print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 293.211974][ C1] ? __pfx_print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 293.212182][ C1] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) 
[ 293.212336][ C1] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) 
[ 293.212586][ C1] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 293.212743][ C1] mark_lock_irq (kernel/locking/lockdep.c:4244) 
[ 293.212900][ C1] ? __pfx_mark_lock_irq (kernel/locking/lockdep.c:4207) 
[ 293.213056][ C1] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 293.213310][ C1] ? add_chain_cache (kernel/locking/lockdep.c:3730) 
[ 293.213465][ C1] ? save_trace (kernel/locking/lockdep.c:586) 
[ 293.213622][ C1] mark_lock (kernel/locking/lockdep.c:4678) 
[ 293.213745][ C1] mark_usage (kernel/locking/lockdep.c:4567) 
[ 293.213864][ C1] __lock_acquire (kernel/locking/lockdep.c:5091) 
[ 293.214120][ C1] ? __lock_acquire (kernel/locking/lockdep.c:5137) 
[ 293.214282][ C1] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) 
[ 293.214474][ C1] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 293.214628][ C1] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) 
[ 293.214920][ C1] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 293.215077][ C1] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 293.215238][ C1] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) 
[ 293.215529][ C1] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 293.215685][ C1] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) 
[ 293.215879][ C1] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 293.216036][ C1] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) 
[ 293.216326][ C1] br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) 
[ 293.216519][ C1] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) 
[ 293.216716][ C1] call_timer_fn (kernel/time/timer.c:1793) 
[ 293.216872][ C1] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 293.217123][ C1] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 293.217282][ C1] ? __pfx_call_timer_fn (kernel/time/timer.c:1770) 
[ 293.217437][ 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) 
[ 293.217594][ C1] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[ 293.217851][ C1] __run_timers (kernel/time/timer.c:1845 kernel/time/timer.c:2418) 
[ 293.218006][ C1] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) 
[ 293.218204][ C1] ? __pfx___run_timers (kernel/time/timer.c:2389) 
[ 293.218370][ 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) 
[ 293.218620][ C1] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 293.218774][ C1] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 293.218926][ C1] ? run_timer_softirq (kernel/time/timer.c:2429 kernel/time/timer.c:2422 kernel/time/timer.c:2438 kernel/time/timer.c:2448) 
[ 293.219082][ C1] run_timer_softirq (kernel/time/timer.c:2430 kernel/time/timer.c:2422 kernel/time/timer.c:2438 kernel/time/timer.c:2448) 
[ 293.219333][ C1] __do_softirq (kernel/softirq.c:554) 
[ 293.219491][ C1] irq_exit_rcu (kernel/softirq.c:428 kernel/softirq.c:633 kernel/softirq.c:645) 
[ 293.219617][ C1] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1043 arch/x86/kernel/apic/apic.c:1043) 
[  293.219778][    C1]  </IRQ>
[  293.219861][    C1]  <TASK>
[ 293.219940][ C1] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 293.220232][ C1] RIP: 0010:_raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 293.220435][ C1] Code: 10 e8 81 21 79 fd 48 89 ef e8 b9 91 79 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 f5 7b 0d 66 <74> 0e 5b 5d c3 cc cc cc cc e8 0f f0 9c fd eb dc 0f 1f 44 00 00 5b
All code
========
   0:	10 e8                	adc    %ch,%al
   2:	81 21 79 fd 48 89    	andl   $0x8948fd79,(%rcx)
   8:	ef                   	out    %eax,(%dx)
   9:	e8 b9 91 79 fd       	call   0xfffffffffd7991c7
   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 f5 7b 0d 66 	decl   %gs:0x660d7bf5(%rip)        # 0x660d7c1f
  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 0f f0 9c fd       	call   0xfffffffffd9cf047
  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 0f f0 9c fd       	call   0xfffffffffd9cf01d
   e:	eb dc                	jmp    0xffffffffffffffec
  10:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  15:	5b                   	pop    %rbx
[  293.221191][    C1] RSP: 0018:ffffc900005ef4c8 EFLAGS: 00000286
[  293.221400][    C1] RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff3a45355
[  293.221632][    C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff99f64de1
[  293.221962][    C1] RBP: ffff88800104f440 R08: 0000000000000001 R09: fffffbfff3a432a9
[  293.222198][    C1] R10: ffffffff9d21954f R11: 0000000000000008 R12: ffff888002030288
[  293.222530][    C1] R13: 0000000000000000 R14: ffffc900005ef518 R15: ffff888002031548
[ 293.222773][ C1] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 293.222969][ C1] qlist_free_all (mm/kasan/quarantine.c:174) 
[ 293.223127][ C1] kasan_quarantine_reduce (./include/linux/srcu.h:285 mm/kasan/quarantine.c:287) 
[ 293.223379][ C1] __kasan_slab_alloc (mm/kasan/common.c:322) 
[ 293.223535][ C1] kmem_cache_alloc (./include/linux/kasan.h:201 mm/slub.c:3798 mm/slub.c:3845 mm/slub.c:3852) 
[ 293.223691][ C1] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 293.223852][ C1] p9_tag_alloc (net/9p/client.c:285) 
[ 293.224114][ C1] ? __pfx_p9_tag_alloc (net/9p/client.c:277) 
[ 293.224269][ 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) 
[ 293.224425][ C1] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) 
[ 293.224580][ 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) 
[ 293.224830][ C1] p9_client_prepare_req (net/9p/client.c:641) 
[ 293.224985][ 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) 
[ 293.225140][ C1] ? __pfx_p9_client_prepare_req (net/9p/client.c:625) 
[ 293.225333][ C1] ? __lock_acquire (kernel/locking/lockdep.c:5137) 
[ 293.225584][ C1] p9_client_rpc (net/9p/client.c:688 (discriminator 4)) 
[ 293.225744][ C1] ? __pfx_p9_client_rpc (net/9p/client.c:672) 
[ 293.225900][ C1] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 293.226056][ C1] ? list_lru_add (mm/list_lru.c:106) 
[ 293.226214][ C1] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 293.226466][ C1] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 293.226623][ C1] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 293.226784][ C1] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 293.226943][ C1] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 293.227202][ C1] p9_client_clunk (net/9p/client.c:1438 (discriminator 3)) 
[ 293.227358][ C1] v9fs_dentry_release (fs/9p/vfs_dentry.c:54) 
[ 293.227514][ C1] __dentry_kill (fs/dcache.c:608) 
[ 293.227668][ C1] ? __pfx_kfree_link (fs/libfs.c:1573) 
[ 293.227921][ C1] dput.part.0 (fs/dcache.c:845) 
[ 293.228077][ C1] walk_component (fs/namei.c:562 fs/namei.c:1027 fs/namei.c:2009) 
[ 293.228233][ C1] link_path_walk.part.0.constprop.0 (fs/namei.c:2328) 
[ 293.228426][ C1] ? __pfx_link_path_walk.part.0.constprop.0 (fs/namei.c:2249) 
[ 293.228718][ C1] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) 
[ 293.228873][ 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) 
[ 293.229028][ C1] path_lookupat (fs/namei.c:2254 (discriminator 2) fs/namei.c:2484 (discriminator 2)) 
[ 293.229184][ C1] filename_lookup (fs/namei.c:2514) 
[ 293.229436][ C1] ? __pfx_filename_lookup (fs/namei.c:2508) 
[ 293.229604][ C1] ? __pfx_kfree_link (fs/libfs.c:1573) 
[ 293.229766][ C1] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 293.229920][ C1] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 293.230171][ C1] ? __might_fault (mm/memory.c:6216 mm/memory.c:6209) 
[ 293.230334][ C1] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 293.230491][ C1] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 293.230647][ C1] vfs_statx (fs/stat.c:244) 
[ 293.230766][ C1] ? __pfx_vfs_statx (fs/stat.c:234) 
[ 293.231018][ C1] ? 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) 
[ 293.231174][ C1] vfs_fstatat (fs/stat.c:305) 
[ 293.231290][ C1] __do_sys_newfstatat (fs/stat.c:469) 
[ 293.231444][ C1] ? __pfx___do_sys_newfstatat (fs/stat.c:464) 
[ 293.231696][ C1] ? __x64_sys_openat (fs/open.c:1432) 
[ 293.231858][ C1] ? __pfx___x64_sys_openat (fs/open.c:1432) 
[ 293.232013][ C1] ? __pfx_do_faccessat (fs/open.c:465) 
[ 293.232175][ C1] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 293.232465][ C1] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 293.232621][ C1] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[  293.232812][    C1] RIP: 0033:0x7fd0dd15aeae
[ 293.232976][ 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
[  293.233731][    C1] RSP: 002b:00007ffff5ffb598 EFLAGS: 00000246 ORIG_RAX: 0000000000000106
[  293.233965][    C1] RAX: ffffffffffffffda RBX: 000000000000000d RCX: 00007fd0dd15aeae
[  293.234293][    C1] RDX: 00007ffff5ffb670 RSI: 00007ffff5ffb5a0 RDI: 00000000ffffff9c
[  293.234531][    C1] RBP: 00007ffff5ffb730 R08: 00000000ffffffff R09: 00007ffff5ffb5a0
[  293.234864][    C1] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffff5ffb5a7


Finger prints:
dump_stack_lvl:mark_lock_irq:mark_lock:mark_usage