======================================
| [ 47.460125][ C3] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
| [   47.460336][    C3]
| [   47.460417][    C3]
| [   47.460417][    C3] stack backtrace:
[   47.460962][    C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   47.461327][    C3] Call Trace:
[   47.461551][    C3]  <IRQ>
[ 47.461635][ C3] dump_stack_lvl (lib/dump_stack.c:117) 
[ 47.461800][ C3] print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 47.462005][ C3] ? __pfx_print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 47.462207][ C3] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) 
[ 47.462471][ C3] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) 
[ 47.462638][ C3] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 47.462803][ C3] mark_lock_irq (kernel/locking/lockdep.c:4244) 
[ 47.462965][ C3] ? __pfx_mark_lock_irq (kernel/locking/lockdep.c:4207) 
[ 47.463238][ C3] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 47.463401][ C3] ? add_chain_cache (kernel/locking/lockdep.c:3730) 
[ 47.463562][ C3] ? save_trace (kernel/locking/lockdep.c:586) 
[ 47.463724][ C3] mark_lock (kernel/locking/lockdep.c:4678) 
[ 47.463845][ C3] mark_usage (kernel/locking/lockdep.c:4567) 
[ 47.463968][ C3] __lock_acquire (kernel/locking/lockdep.c:5091) 
[ 47.464133][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5137) 
[ 47.464305][ C3] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) bridge
[ 47.464689][ C3] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 47.464851][ C3] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge
[ 47.465088][ C3] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 47.465251][ C3] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 47.465514][ C3] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge
[ 47.465753][ C3] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 47.465913][ C3] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge
[ 47.466150][ C3] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 47.466413][ C3] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge
[ 47.466648][ C3] br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge
[ 47.466887][ C3] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) bridge
[ 47.467265][ C3] call_timer_fn (kernel/time/timer.c:1793) 
[ 47.467426][ C3] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 47.467587][ C3] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 47.467748][ C3] ? __pfx_call_timer_fn (kernel/time/timer.c:1770) 
[ 47.467908][ C3] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) 
[ 47.468137][ C3] __run_timers (kernel/time/timer.c:1845 kernel/time/timer.c:2418) 
[ 47.468297][ C3] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) bridge
[ 47.468572][ C3] ? __pfx___run_timers (kernel/time/timer.c:2389) 
[ 47.468740][ 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) 
[ 47.468909][ C3] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 47.469081][ C3] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 47.469241][ C3] ? run_timer_softirq (kernel/time/timer.c:2429 kernel/time/timer.c:2422 kernel/time/timer.c:2438 kernel/time/timer.c:2448) 
[ 47.469403][ C3] run_timer_softirq (kernel/time/timer.c:2430 kernel/time/timer.c:2422 kernel/time/timer.c:2438 kernel/time/timer.c:2448) 
[ 47.469565][ C3] __do_softirq (kernel/softirq.c:554) 
[ 47.469728][ C3] irq_exit_rcu (kernel/softirq.c:428 kernel/softirq.c:633 kernel/softirq.c:645) 
[ 47.469850][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1043 arch/x86/kernel/apic/apic.c:1043) 
[   47.470010][    C3]  </IRQ>
[   47.470098][    C3]  <TASK>
[ 47.470292][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 47.470505][ C3] RIP: 0010:kasan_report (./arch/x86/include/asm/current.h:49 mm/kasan/report.c:93 mm/kasan/report.c:585) 
[ 47.470682][ C3] Code: 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 41 57 41 56 41 55 41 54 55 53 48 83 ec 70 9c 8f 04 24 0f 01 ca <65> 4c 8b 3d 2f 7c 6b 5f 41 8b 87 a8 14 00 00 85 c0 0f 85 b7 00 00
All code
========
   0:	00 90 90 90 90 90    	add    %dl,-0x6f6f6f70(%rax)
   6:	90                   	nop
   7:	90                   	nop
   8:	90                   	nop
   9:	90                   	nop
   a:	90                   	nop
   b:	90                   	nop
   c:	90                   	nop
   d:	90                   	nop
   e:	90                   	nop
   f:	90                   	nop
  10:	90                   	nop
  11:	66 0f 1f 00          	nopw   (%rax)
  15:	41 57                	push   %r15
  17:	41 56                	push   %r14
  19:	41 55                	push   %r13
  1b:	41 54                	push   %r12
  1d:	55                   	push   %rbp
  1e:	53                   	push   %rbx
  1f:	48 83 ec 70          	sub    $0x70,%rsp
  23:	9c                   	pushf
  24:	8f 04 24             	pop    (%rsp)
  27:	0f 01 ca             	clac
  2a:*	65 4c 8b 3d 2f 7c 6b 	mov    %gs:0x5f6b7c2f(%rip),%r15        # 0x5f6b7c61		<-- trapping instruction
  31:	5f 
  32:	41 8b 87 a8 14 00 00 	mov    0x14a8(%r15),%eax
  39:	85 c0                	test   %eax,%eax
  3b:	0f                   	.byte 0xf
  3c:	85                   	.byte 0x85
  3d:	b7 00                	mov    $0x0,%bh
	...

Code starting with the faulting instruction
===========================================
   0:	65 4c 8b 3d 2f 7c 6b 	mov    %gs:0x5f6b7c2f(%rip),%r15        # 0x5f6b7c37
   7:	5f 
   8:	41 8b 87 a8 14 00 00 	mov    0x14a8(%r15),%eax
   f:	85 c0                	test   %eax,%eax
  11:	0f                   	.byte 0xf
  12:	85                   	.byte 0x85
  13:	b7 00                	mov    $0x0,%bh
	...
[   47.471387][    C3] RSP: 0018:ffffc9000065f318 EFLAGS: 00000286
[   47.471598][    C3] RAX: ffff8880092a1000 RBX: ffff8880092a01c8 RCX: ffffffffa283b764
[   47.471840][    C3] RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff8880092a01c8
[   47.472079][    C3] RBP: 0000000000001000 R08: ffff8880092a0000 R09: 00000000000000bb
[   47.472321][    C3] R10: ffff8880092a5054 R11: ffff88803ffdb700 R12: bbbbbbbbbbbbbbbb
[   47.472562][    C3] R13: 00000000000000bb R14: dffffc0000000000 R15: 00000000000000bb
[ 47.472808][ C3] ? memchr_inv (lib/string.c:856) 
[ 47.472978][ C3] ? __alloc_pages (mm/page_alloc.c:4541) 
[ 47.473236][ C3] memchr_inv (lib/string.c:856) 
[ 47.473470][ C3] check_bytes_and_report (mm/slub.c:1175) 
[ 47.473634][ C3] check_object (mm/slub.c:1303) 
[ 47.473796][ C3] alloc_debug_processing (mm/slub.c:1544 mm/slub.c:1554) 
[ 47.473957][ C3] ___slab_alloc (mm/slub.c:2537 mm/slub.c:3536) 
[ 47.474222][ C3] ? fs_reclaim_acquire (mm/page_alloc.c:3715 mm/page_alloc.c:3706) 
[ 47.474390][ C3] ? p9_fcall_init (net/9p/client.c:232) 
[ 47.474555][ C3] ? p9_fcall_init (net/9p/client.c:232) 
[ 47.474714][ C3] ? __kmalloc (mm/slub.c:3610 mm/slub.c:3663 mm/slub.c:3835 mm/slub.c:3965 mm/slub.c:3979) 
[ 47.474875][ C3] __kmalloc (mm/slub.c:3610 mm/slub.c:3663 mm/slub.c:3835 mm/slub.c:3965 mm/slub.c:3979) 
[ 47.475100][ C3] p9_fcall_init (net/9p/client.c:232) 
[ 47.475263][ C3] p9_tag_alloc (net/9p/client.c:297) 
[ 47.475426][ C3] ? __pfx_p9_tag_alloc (net/9p/client.c:277) 
[ 47.475587][ C3] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) 
[ 47.475748][ C3] ? 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) 
[ 47.475913][ C3] p9_client_prepare_req (net/9p/client.c:641) 
[ 47.476073][ C3] ? 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) 
[ 47.476234][ C3] ? __pfx_p9_client_prepare_req (net/9p/client.c:625) 
[ 47.476435][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5137) 
[ 47.476595][ C3] p9_client_rpc (net/9p/client.c:688 (discriminator 4)) 
[ 47.476757][ C3] ? __pfx_p9_client_rpc (net/9p/client.c:672) 
[ 47.476919][ C3] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 47.477288][ C3] ? list_lru_add (mm/list_lru.c:106) 
[ 47.477452][ C3] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 47.477617][ C3] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 47.477779][ C3] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 47.477941][ C3] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 47.478211][ C3] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 47.478374][ C3] p9_client_clunk (net/9p/client.c:1438 (discriminator 3)) 
[ 47.478535][ C3] v9fs_dentry_release (fs/9p/vfs_dentry.c:54) 
[ 47.478699][ C3] __dentry_kill (fs/dcache.c:608) 
[ 47.478864][ C3] ? __pfx_kfree_link (fs/libfs.c:1573) 
[ 47.479033][ C3] dput.part.0 (fs/dcache.c:845) 
[ 47.479197][ C3] walk_component (fs/namei.c:562 fs/namei.c:1027 fs/namei.c:2009) 
[ 47.479373][ C3] link_path_walk.part.0.constprop.0 (fs/namei.c:2328) 
[ 47.479574][ C3] ? __pfx_link_path_walk.part.0.constprop.0 (fs/namei.c:2249) 
[ 47.479778][ C3] path_openat (fs/namei.c:3795) 
[ 47.479940][ C3] ? __pfx_path_openat (fs/namei.c:3781) 
[ 47.480107][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5137) 
[ 47.480396][ C3] do_filp_open (fs/namei.c:3826) 
[ 47.480563][ C3] ? __pfx_do_filp_open (fs/namei.c:3820) 
[ 47.480725][ C3] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 47.480894][ C3] ? __pfx_kfree_link (fs/libfs.c:1573) 
[ 47.481166][ C3] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 47.481327][ C3] ? alloc_fd (fs/file.c:555 (discriminator 10)) 
[ 47.481449][ C3] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 47.481610][ C3] ? _raw_spin_unlock (./arch/x86/include/asm/preempt.h:94 ./include/linux/spinlock_api_smp.h:143 kernel/locking/spinlock.c:186) 
[ 47.481772][ C3] ? alloc_fd (fs/file.c:555 (discriminator 10)) 
[ 47.481895][ C3] do_sys_openat2 (fs/open.c:1406) 
[ 47.482061][ C3] ? vfs_fstatat (fs/stat.c:308) 
[ 47.482226][ C3] ? __pfx_do_sys_openat2 (fs/open.c:1392) 
[ 47.482387][ C3] ? __pfx___do_sys_newfstatat (fs/stat.c:464) 
[ 47.482551][ C3] __x64_sys_openat (fs/open.c:1432) 
[ 47.482711][ C3] ? __pfx___x64_sys_openat (fs/open.c:1432) 
[ 47.482870][ C3] ? __pfx_do_faccessat (fs/open.c:465) 
[ 47.483034][ C3] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 47.483301][ C3] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[   47.483511][    C3] RIP: 0033:0x7f4e057b70e8
[ 47.483677][ C3] Code: f9 41 89 f0 41 83 e2 40 75 30 89 f0 25 00 00 41 00 3d 00 00 41 00 74 22 44 89 c2 4c 89 ce bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 30 c3 0f 1f 80 00 00 00 00 48 8d 44 24 08 c7
All code
========
   0:	f9                   	stc
   1:	41 89 f0             	mov    %esi,%r8d
   4:	41 83 e2 40          	and    $0x40,%r10d
   8:	75 30                	jne    0x3a
   a:	89 f0                	mov    %esi,%eax
   c:	25 00 00 41 00       	and    $0x410000,%eax
  11:	3d 00 00 41 00       	cmp    $0x410000,%eax
  16:	74 22                	je     0x3a
  18:	44 89 c2             	mov    %r8d,%edx
  1b:	4c 89 ce             	mov    %r9,%rsi
  1e:	bf 9c ff ff ff       	mov    $0xffffff9c,%edi
  23:	b8 01 01 00 00       	mov    $0x101,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 30                	ja     0x62
  32:	c3                   	ret
  33:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  3a:	48 8d 44 24 08       	lea    0x8(%rsp),%rax
  3f:	c7                   	.byte 0xc7

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 30                	ja     0x38
   8:	c3                   	ret
   9:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  10:	48 8d 44 24 08       	lea    0x8(%rsp),%rax
  15:	c7                   	.byte 0xc7
[   47.484359][    C3] RSP: 002b:00007ffc242e2d38 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
[   47.484604][    C3] RAX: ffffffffffffffda RBX: 00007ffc242e2fbf RCX: 00007f4e057b70e8
[   47.484849][    C3] RDX: 0000000000080000 RSI: 00007ffc242e2db0 RDI: 00000000ffffff9c
[   47.485088][    C3] RBP: 00007ffc242e2da0 R08: 0000000000080000 R09: 00007ffc242e2db0
[   47.485327][    C3] R10: 0000000000000000 R11: 0000000000000287 R12: 00007ffc242e2db7


Finger prints:
dump_stack_lvl:mark_lock_irq:mark_lock:mark_usage