======================================
| [ 37.793715][ C0] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
| [   37.793947][    C0]
| [   37.794029][    C0]
| [   37.794029][    C0] stack backtrace:
[   37.794558][    C0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   37.794908][    C0] Call Trace:
[   37.795130][    C0]  <IRQ>
[ 37.795213][ C0] dump_stack_lvl (lib/dump_stack.c:117) 
[ 37.795375][ C0] print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 37.795575][ C0] ? __pfx_print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 37.795780][ C0] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) 
[ 37.795948][ C0] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) 
[ 37.796110][ C0] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 37.796272][ C0] mark_lock_irq (kernel/locking/lockdep.c:4244) 
[ 37.796431][ C0] ? __pfx_mark_lock_irq (kernel/locking/lockdep.c:4207) 
[ 37.796797][ C0] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 37.796964][ C0] ? save_trace (kernel/locking/lockdep.c:586) 
[ 37.797129][ C0] mark_lock (kernel/locking/lockdep.c:4678) 
[ 37.797252][ C0] mark_usage (kernel/locking/lockdep.c:4567) 
[ 37.797372][ C0] __lock_acquire (kernel/locking/lockdep.c:5091) 
[ 37.797753][ C0] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 37.797922][ C0] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934) 
[ 37.798081][ C0] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 37.798240][ C0] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 37.798497][ C0] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934) 
[ 37.798657][ C0] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 37.798815][ C0] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934) 
[ 37.798972][ C0] _raw_read_lock_bh (./include/linux/rwlock_api_smp.h:177 kernel/locking/spinlock.c:252) 
[ 37.799256][ C0] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934) 
[ 37.799413][ C0] ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934) 
[ 37.799569][ C0] ndisc_send_ns (net/ipv6/ndisc.c:658) 
[ 37.799729][ C0] ? __pfx_ndisc_send_ns (net/ipv6/ndisc.c:653) 
[ 37.799889][ C0] ? __ipv6_chk_addr_and_flags (net/ipv6/addrconf.c:2009) 
[ 37.800086][ C0] ndisc_solicit (net/ipv6/ndisc.c:736) 
[ 37.800280][ C0] ? __pfx_ndisc_solicit (net/ipv6/ndisc.c:736) 
[ 37.800451][ C0] ? neigh_probe (net/core/neighbour.c:1074) 
[ 37.800626][ C0] neigh_probe (net/core/neighbour.c:1075) 
[ 37.800753][ C0] neigh_timer_handler (net/core/neighbour.c:1163) 
[ 37.800934][ C0] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 37.801102][ C0] ? __pfx_neigh_timer_handler (net/core/neighbour.c:1083) 
[ 37.801259][ C0] call_timer_fn (kernel/time/timer.c:1793) 
[ 37.801516][ C0] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 37.801671][ C0] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 37.801844][ C0] ? __pfx_call_timer_fn (kernel/time/timer.c:1770) 
[ 37.802000][ 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) 
[ 37.802274][ C0] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[ 37.802432][ C0] __run_timers (kernel/time/timer.c:1845 kernel/time/timer.c:2418) 
[ 37.802589][ C0] ? __pfx_neigh_timer_handler (net/core/neighbour.c:1083) 
[ 37.802746][ C0] ? __pfx___run_timers (kernel/time/timer.c:2389) 
[ 37.802908][ 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) 
[ 37.803067][ C0] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 37.803227][ C0] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 37.803394][ C0] ? run_timer_softirq (kernel/time/timer.c:2429 kernel/time/timer.c:2422 kernel/time/timer.c:2438 kernel/time/timer.c:2448) 
[ 37.803553][ C0] run_timer_softirq (kernel/time/timer.c:2430 kernel/time/timer.c:2422 kernel/time/timer.c:2438 kernel/time/timer.c:2448) 
[ 37.803710][ C0] __do_softirq (kernel/softirq.c:554) 
[ 37.803868][ C0] irq_exit_rcu (kernel/softirq.c:428 kernel/softirq.c:633 kernel/softirq.c:645) 
[ 37.803990][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1043 arch/x86/kernel/apic/apic.c:1043) 
[   37.804148][    C0]  </IRQ>
[   37.804235][    C0]  <TASK>
[ 37.804419][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 37.804617][ C0] RIP: 0010:_raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 37.804827][ C0] 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 2f 79 <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 2f 79 	decl   %gs:0x792fbf05(%rip)        # 0x792fbf2f
  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
[   37.805510][    C0] RSP: 0018:ffffc9000069f578 EFLAGS: 00000286
[   37.805719][    C0] RAX: 0000000000000002 RBX: 0000000000000200 RCX: 1ffffffff13e596e
[   37.805971][    C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff86d40911
[   37.806208][    C0] RBP: ffff888001041080 R08: 0000000000000001 R09: fffffbfff13e38a9
[   37.806442][    C0] R10: ffffffff89f1c54f R11: 0000000000001000 R12: ffff8880070cc000
[   37.806678][    C0] R13: 0000000000000000 R14: ffffc9000069f5c8 R15: ffff888006e31000
[ 37.806930][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 37.807143][ C0] qlist_free_all (mm/kasan/quarantine.c:174) 
[ 37.807435][ C0] ? p9pdu_vreadf (./include/linux/slab.h:632 net/9p/protocol.c:313) 
[ 37.807594][ C0] kasan_quarantine_reduce (./include/linux/srcu.h:285 mm/kasan/quarantine.c:287) 
[ 37.807752][ C0] __kasan_slab_alloc (mm/kasan/common.c:322) 
[ 37.807912][ C0] __kmalloc (mm/slub.c:3799 mm/slub.c:3845 mm/slub.c:3965 mm/slub.c:3979) 
[ 37.808067][ C0] p9pdu_vreadf (./include/linux/slab.h:632 net/9p/protocol.c:313) 
[ 37.808362][ C0] ? trace_9p_client_res (./include/trace/events/9p.h:146 (discriminator 52)) 
[ 37.808534][ C0] ? p9_client_rpc (net/9p/client.c:755) 
[ 37.808712][ C0] ? __pfx_p9pdu_vreadf (net/9p/protocol.c:260) 
[ 37.808891][ C0] ? __pfx_p9_client_rpc (net/9p/client.c:672) 
[ 37.809048][ C0] p9pdu_readf (net/9p/protocol.c:696) 
[ 37.809169][ C0] ? __pfx_p9pdu_readf (net/9p/protocol.c:696) 
[ 37.809328][ C0] ? __pfx_v9fs_fid_find (fs/9p/fid.c:114) 
[ 37.809486][ C0] ? __pfx_make_vfsgid (fs/mnt_idmapping.c:110) 
[ 37.809742][ C0] ? v9fs_fid_add (fs/9p/fid.c:41) 
[ 37.809911][ C0] p9_client_readlink (net/9p/client.c:2242) 
[ 37.810069][ C0] v9fs_vfs_get_link_dotl (fs/9p/vfs_inode_dotl.c:822 fs/9p/vfs_inode_dotl.c:806) 
[ 37.810229][ C0] ? __pfx_v9fs_vfs_get_link_dotl (fs/9p/vfs_inode_dotl.c:809) 
[ 37.810527][ C0] ? __lookup_slow (fs/namei.c:1692) 
[ 37.810684][ C0] pick_link (fs/namei.c:1808) 
[ 37.810802][ C0] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 37.810976][ C0] step_into (fs/namei.c:1874) 
[ 37.811095][ C0] ? __up_read (./arch/x86/include/asm/atomic64_64.h:79 ./include/linux/atomic/atomic-arch-fallback.h:2749 ./include/linux/atomic/atomic-long.h:184 ./include/linux/atomic/atomic-instrumented.h:3317 kernel/locking/rwsem.c:1347) 
[ 37.811351][ C0] ? __pfx_step_into (fs/namei.c:1839) 
[ 37.811508][ C0] ? walk_component (fs/namei.c:2005) 
[ 37.811669][ C0] link_path_walk.part.0.constprop.0 (fs/namei.c:2331) 
[ 37.811871][ C0] ? __pfx_link_path_walk.part.0.constprop.0 (fs/namei.c:2249) 
[ 37.812166][ C0] path_openat (fs/namei.c:3795) 
[ 37.812323][ C0] ? __pfx_path_openat (fs/namei.c:3781) 
[ 37.812479][ C0] ? __lock_acquire (kernel/locking/lockdep.c:5137) 
[ 37.812637][ C0] do_filp_open (fs/namei.c:3826) 
[ 37.812798][ C0] ? __pfx_do_filp_open (fs/namei.c:3820) 
[ 37.812954][ C0] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 37.813114][ C0] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 37.813272][ C0] ? alloc_fd (fs/file.c:555 (discriminator 10)) 
[ 37.813391][ 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) 
[ 37.813647][ C0] ? _raw_spin_unlock (./arch/x86/include/asm/preempt.h:94 ./include/linux/spinlock_api_smp.h:143 kernel/locking/spinlock.c:186) 
[ 37.813811][ C0] ? alloc_fd (fs/file.c:555 (discriminator 10)) 
[ 37.813931][ C0] do_sys_openat2 (fs/open.c:1406) 
[ 37.814087][ C0] ? vfs_fstatat (fs/stat.c:308) 
[ 37.814345][ C0] ? __pfx_do_sys_openat2 (fs/open.c:1392) 
[ 37.814501][ C0] ? __pfx___do_sys_newfstatat (fs/stat.c:464) 
[ 37.814659][ C0] __x64_sys_openat (fs/open.c:1432) 
[ 37.814817][ C0] ? __pfx___x64_sys_openat (fs/open.c:1432) 
[ 37.815076][ C0] ? __pfx_do_faccessat (fs/open.c:465) 
[ 37.815236][ C0] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 37.815393][ C0] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[   37.815588][    C0] RIP: 0033:0x7f509c6f50e8
[ 37.815873][ 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
[   37.816484][    C0] RSP: 002b:00007fff6bc5c1c8 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
[   37.816845][    C0] RAX: ffffffffffffffda RBX: 00007fff6bc5c45f RCX: 00007f509c6f50e8
[   37.817101][    C0] RDX: 0000000000080000 RSI: 00007fff6bc5c240 RDI: 00000000ffffff9c
[   37.817358][    C0] RBP: 00007fff6bc5c230 R08: 0000000000080000 R09: 00007fff6bc5c240
[   37.817738][    C0] R10: 0000000000000000 R11: 0000000000000287 R12: 00007fff6bc5c247


Finger prints:
dump_stack_lvl:mark_lock_irq:mark_lock:mark_usage