======================================
| [ 32.087229][ C0] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
| [   32.087419][    C0]
| [   32.087495][    C0]
| [   32.087495][    C0] stack backtrace:
[   32.088004][    C0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   32.088435][    C0] Call Trace:
[   32.088555][    C0]  <IRQ>
[ 32.088633][ C0] dump_stack_lvl (lib/dump_stack.c:117) 
[ 32.088788][ C0] print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 32.088981][ C0] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 32.089248][ C0] ? __pfx_print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 32.089436][ C0] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) 
[ 32.089588][ C0] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) 
[ 32.089738][ C0] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 32.089892][ C0] mark_lock_irq (kernel/locking/lockdep.c:4244) 
[ 32.090044][ C0] ? __pfx_mark_lock_irq (kernel/locking/lockdep.c:4207) 
[ 32.090200][ C0] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 32.090355][ C0] ? save_trace (kernel/locking/lockdep.c:586) 
[ 32.090508][ C0] mark_lock (kernel/locking/lockdep.c:4678) 
[ 32.090623][ C0] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 32.090774][ C0] mark_usage (kernel/locking/lockdep.c:4567) 
[ 32.090890][ C0] __lock_acquire (kernel/locking/lockdep.c:5091) 
[ 32.091045][ C0] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) 
[ 32.091198][ C0] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 32.091352][ C0] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 32.091505][ C0] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 32.091660][ C0] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 32.091910][ C0] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 32.092062][ C0] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 32.092215][ C0] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 32.092368][ C0] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 32.092520][ C0] _raw_write_lock (./include/linux/rwlock_api_smp.h:210 kernel/locking/spinlock.c:300) 
[ 32.092767][ C0] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 32.092921][ C0] addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 32.093072][ C0] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 32.093227][ C0] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 32.093474][ C0] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 32.093626][ C0] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 32.093778][ C0] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 32.093929][ C0] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 32.094193][ C0] call_timer_fn (kernel/time/timer.c:1793) 
[ 32.094350][ C0] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 32.094501][ C0] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 32.094652][ C0] ? __pfx_call_timer_fn (kernel/time/timer.c:1770) 
[ 32.094803][ 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) 
[ 32.094954][ C0] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[ 32.095108][ C0] __run_timers (kernel/time/timer.c:1845 kernel/time/timer.c:2418) 
[ 32.095261][ C0] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 32.095436][ C0] ? __pfx___run_timers (kernel/time/timer.c:2389) 
[ 32.095589][ 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) 
[ 32.095745][ C0] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 32.095897][ C0] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 32.096048][ C0] ? run_timer_softirq (kernel/time/timer.c:2429 kernel/time/timer.c:2422 kernel/time/timer.c:2438 kernel/time/timer.c:2448) 
[ 32.096201][ C0] run_timer_softirq (kernel/time/timer.c:2430 kernel/time/timer.c:2422 kernel/time/timer.c:2438 kernel/time/timer.c:2448) 
[ 32.096356][ C0] __do_softirq (kernel/softirq.c:554) 
[ 32.096509][ C0] irq_exit_rcu (kernel/softirq.c:428 kernel/softirq.c:633 kernel/softirq.c:645) 
[ 32.096623][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1043 arch/x86/kernel/apic/apic.c:1043) 
[   32.096968][    C0]  </IRQ>
[   32.097046][    C0]  <TASK>
[ 32.097126][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 32.097314][ C0] RIP: 0010:stack_depot_save_flags (lib/stackdepot.c:611 (discriminator 1)) 
[ 32.097512][ C0] Code: 20 31 c0 48 c7 44 24 18 00 00 00 00 41 83 e5 fc 0f 85 57 03 00 00 48 89 fd 89 d3 41 89 cf e8 ab 37 37 ff 41 89 c6 85 c0 74 18 <44> 0f b6 25 5c e6 6b 05 41 80 fc 01 0f 87 ac 8d a7 01 41 83 e4 01
All code
========
   0:	20 31                	and    %dh,(%rcx)
   2:	c0 48 c7 44          	rorb   $0x44,-0x39(%rax)
   6:	24 18                	and    $0x18,%al
   8:	00 00                	add    %al,(%rax)
   a:	00 00                	add    %al,(%rax)
   c:	41 83 e5 fc          	and    $0xfffffffc,%r13d
  10:	0f 85 57 03 00 00    	jne    0x36d
  16:	48 89 fd             	mov    %rdi,%rbp
  19:	89 d3                	mov    %edx,%ebx
  1b:	41 89 cf             	mov    %ecx,%r15d
  1e:	e8 ab 37 37 ff       	call   0xffffffffff3737ce
  23:	41 89 c6             	mov    %eax,%r14d
  26:	85 c0                	test   %eax,%eax
  28:	74 18                	je     0x42
  2a:*	44 0f b6 25 5c e6 6b 	movzbl 0x56be65c(%rip),%r12d        # 0x56be68e		<-- trapping instruction
  31:	05 
  32:	41 80 fc 01          	cmp    $0x1,%r12b
  36:	0f 87 ac 8d a7 01    	ja     0x1a78de8
  3c:	41 83 e4 01          	and    $0x1,%r12d

Code starting with the faulting instruction
===========================================
   0:	44 0f b6 25 5c e6 6b 	movzbl 0x56be65c(%rip),%r12d        # 0x56be664
   7:	05 
   8:	41 80 fc 01          	cmp    $0x1,%r12b
   c:	0f 87 ac 8d a7 01    	ja     0x1a78dbe
  12:	41 83 e4 01          	and    $0x1,%r12d
[   32.098151][    C0] RSP: 0018:ffffc90000f6f3f0 EFLAGS: 00000202
[   32.098347][    C0] RAX: 0000000000000010 RBX: 0000000000002800 RCX: 0000000000000001
[   32.098677][    C0] RDX: ffffffffab5cfa13 RSI: 0000000000000010 RDI: ffffc90000f6f4d0
[   32.098904][    C0] RBP: ffffc90000f6f450 R08: ffffc90000f6f358 R09: fffff520001ede4c
[   32.099230][    C0] R10: ffffc90000f6f318 R11: ffffc90000f6f359 R12: ffff88800491f3c0
[   32.099456][    C0] R13: 0000000000000000 R14: 0000000000000010 R15: 0000000000000001
[ 32.099689][ C0] ? __x64_sys_openat (fs/open.c:1432) 
[ 32.099844][ C0] set_track_prepare (mm/slub.c:889) 
[ 32.100091][ C0] ? kasan_quarantine_reduce (./include/linux/srcu.h:285 mm/kasan/quarantine.c:287) 
[ 32.100243][ C0] ? __kasan_slab_alloc (mm/kasan/common.c:322) 
[ 32.100394][ C0] ? kmem_cache_alloc (./include/linux/kasan.h:201 mm/slub.c:3798 mm/slub.c:3845 mm/slub.c:3852) 
[ 32.100548][ C0] ? p9_tag_alloc (net/9p/client.c:285) 
[ 32.100799][ C0] ? p9_client_prepare_req (net/9p/client.c:641) 
[ 32.100950][ C0] ? p9_client_rpc (net/9p/client.c:688 (discriminator 4)) 
[ 32.101099][ C0] ? p9_client_clunk (net/9p/client.c:1438 (discriminator 3)) 
[ 32.101253][ C0] ? v9fs_dentry_release (fs/9p/vfs_dentry.c:54) 
[ 32.101501][ C0] ? __dentry_kill (fs/dcache.c:608) 
[ 32.101652][ C0] ? dput.part.0 (fs/dcache.c:845) 
[ 32.101805][ C0] ? walk_component (fs/namei.c:562 fs/namei.c:1027 fs/namei.c:2009) 
[ 32.101956][ C0] ? link_path_walk.part.0.constprop.0 (fs/namei.c:2328) 
[ 32.102243][ C0] ? path_openat (fs/namei.c:3795) 
[ 32.102394][ C0] ? do_filp_open (fs/namei.c:3826) 
[ 32.102545][ C0] ? do_sys_openat2 (fs/open.c:1406) 
[ 32.102698][ C0] ? __x64_sys_openat (fs/open.c:1432) 
[ 32.102852][ C0] free_to_partial_list (mm/slub.c:4026) 
[ 32.103002][ C0] ? qlist_free_all (mm/kasan/quarantine.c:163 mm/kasan/quarantine.c:179) 
[ 32.103155][ C0] qlist_free_all (mm/kasan/quarantine.c:174) 
[ 32.103306][ C0] kasan_quarantine_reduce (./include/linux/srcu.h:285 mm/kasan/quarantine.c:287) 
[ 32.103459][ C0] __kasan_slab_alloc (mm/kasan/common.c:322) 
[ 32.103610][ C0] kmem_cache_alloc (./include/linux/kasan.h:201 mm/slub.c:3798 mm/slub.c:3845 mm/slub.c:3852) 
[ 32.103762][ C0] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 32.103916][ C0] p9_tag_alloc (net/9p/client.c:285) 
[ 32.104071][ C0] ? __pfx_p9_tag_alloc (net/9p/client.c:277) 
[ 32.104319][ 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) 
[ 32.104470][ C0] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) 
[ 32.104622][ 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) 
[ 32.104774][ C0] p9_client_prepare_req (net/9p/client.c:641) 
[ 32.105024][ 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) 
[ 32.105176][ C0] ? __pfx_p9_client_prepare_req (net/9p/client.c:625) 
[ 32.105370][ C0] ? __lock_acquire (kernel/locking/lockdep.c:5137) 
[ 32.105525][ C0] p9_client_rpc (net/9p/client.c:688 (discriminator 4)) 
[ 32.105775][ C0] ? __pfx_p9_client_rpc (net/9p/client.c:672) 
[ 32.105926][ C0] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 32.106080][ C0] ? list_lru_add (mm/list_lru.c:106) 
[ 32.106232][ C0] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 32.106481][ C0] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 32.106633][ C0] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 32.106784][ C0] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 32.106936][ C0] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 32.107093][ C0] p9_client_clunk (net/9p/client.c:1438 (discriminator 3)) 
[ 32.107345][ C0] v9fs_dentry_release (fs/9p/vfs_dentry.c:54) 
[ 32.107496][ C0] __dentry_kill (fs/dcache.c:608) 
[ 32.107648][ C0] ? __pfx_kfree_link (fs/libfs.c:1573) 
[ 32.107800][ C0] dput.part.0 (fs/dcache.c:845) 
[ 32.108048][ C0] walk_component (fs/namei.c:562 fs/namei.c:1027 fs/namei.c:2009) 
[ 32.108202][ C0] link_path_walk.part.0.constprop.0 (fs/namei.c:2328) 
[ 32.108391][ C0] ? __pfx_link_path_walk.part.0.constprop.0 (fs/namei.c:2249) 
[ 32.108586][ C0] path_openat (fs/namei.c:3795) 
[ 32.108931][ C0] ? __pfx_path_openat (fs/namei.c:3781) 
[ 32.109083][ C0] ? __lock_acquire (kernel/locking/lockdep.c:5137) 
[ 32.109236][ C0] do_filp_open (fs/namei.c:3826) 
[ 32.109390][ C0] ? __pfx_do_filp_open (fs/namei.c:3820) 
[ 32.109637][ C0] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 32.109791][ C0] ? __pfx_kfree_link (fs/libfs.c:1573) 
[ 32.109942][ C0] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 32.110094][ C0] ? alloc_fd (fs/file.c:555 (discriminator 10)) 
[ 32.110309][ C0] ? 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) 
[ 32.110460][ C0] ? _raw_spin_unlock (./arch/x86/include/asm/preempt.h:94 ./include/linux/spinlock_api_smp.h:143 kernel/locking/spinlock.c:186) 
[ 32.110614][ C0] ? alloc_fd (fs/file.c:555 (discriminator 10)) 
[ 32.110730][ C0] do_sys_openat2 (fs/open.c:1406) 
[ 32.110881][ C0] ? vfs_fstatat (fs/stat.c:308) 
[ 32.111128][ C0] ? __pfx_do_sys_openat2 (fs/open.c:1392) 
[ 32.111280][ C0] ? __pfx___do_sys_newfstatat (fs/stat.c:464) 
[ 32.111432][ C0] __x64_sys_openat (fs/open.c:1432) 
[ 32.111589][ C0] ? __pfx___x64_sys_openat (fs/open.c:1432) 
[ 32.111837][ C0] ? __pfx_do_faccessat (fs/open.c:465) 
[ 32.111991][ C0] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 32.112142][ C0] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[   32.112329][    C0] RIP: 0033:0x7f6db83130e8
[ 32.112584][ C0] 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
[   32.113123][    C0] RSP: 002b:00007ffca8c70018 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
[   32.113450][    C0] RAX: ffffffffffffffda RBX: 00007ffca8c702af RCX: 00007f6db83130e8
[   32.113676][    C0] RDX: 0000000000080000 RSI: 00007ffca8c70090 RDI: 00000000ffffff9c
[   32.113903][    C0] RBP: 00007ffca8c70080 R08: 0000000000080000 R09: 00007ffca8c70090
[   32.114228][    C0] R10: 0000000000000000 R11: 0000000000000287 R12: 00007ffca8c70097


Finger prints:
dump_stack_lvl:mark_lock_irq:mark_lock:mark_usage