======================================
| [ 34.645865][ C3] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
| [   34.646051][    C3]
| [   34.646126][    C3]
| [   34.646126][    C3] stack backtrace:
[   34.646625][    C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   34.647050][    C3] Call Trace:
[   34.647171][    C3]  <IRQ>
[ 34.647251][ C3] dump_stack_lvl (lib/dump_stack.c:117) 
[ 34.647404][ C3] print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 34.647591][ C3] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 34.647836][ C3] ? __pfx_print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 34.648024][ C3] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) 
[ 34.648174][ C3] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) 
[ 34.648323][ C3] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 34.648657][ C3] mark_lock_irq (kernel/locking/lockdep.c:4244) 
[ 34.648810][ C3] ? __pfx_mark_lock_irq (kernel/locking/lockdep.c:4207) 
[ 34.648959][ C3] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 34.649111][ C3] ? save_trace (kernel/locking/lockdep.c:586) 
[ 34.649357][ C3] mark_lock (kernel/locking/lockdep.c:4678) 
[ 34.649470][ C3] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 34.649620][ C3] mark_usage (kernel/locking/lockdep.c:4567) 
[ 34.649734][ C3] __lock_acquire (kernel/locking/lockdep.c:5091) 
[ 34.649886][ C3] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) 
[ 34.650130][ C3] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 34.650282][ C3] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 34.650432][ C3] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 34.650582][ C3] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 34.650825][ C3] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 34.650975][ C3] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 34.651123][ C3] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 34.651272][ C3] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 34.651427][ C3] _raw_write_lock (./include/linux/rwlock_api_smp.h:210 kernel/locking/spinlock.c:300) 
[ 34.651669][ C3] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 34.651819][ C3] addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 34.651968][ C3] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 34.652118][ C3] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 34.652361][ C3] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 34.652513][ C3] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 34.652663][ C3] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 34.652812][ C3] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 34.653056][ C3] call_timer_fn (kernel/time/timer.c:1793) 
[ 34.653206][ C3] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 34.653356][ C3] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 34.653507][ C3] ? __pfx_call_timer_fn (kernel/time/timer.c:1770) 
[ 34.653748][ 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) 
[ 34.653898][ C3] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[ 34.654050][ C3] __run_timers (kernel/time/timer.c:1845 kernel/time/timer.c:2418) 
[ 34.654200][ C3] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 34.654352][ C3] ? __pfx___run_timers (kernel/time/timer.c:2389) 
[ 34.654596][ C3] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 34.654748][ 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) 
[ 34.654897][ C3] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 34.655047][ C3] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 34.655297][ C3] ? timer_expire_remote (kernel/time/timer.c:2429 kernel/time/timer.c:2422 kernel/time/timer.c:2181) 
[ 34.655448][ C3] timer_expire_remote (kernel/time/timer.c:2430 kernel/time/timer.c:2422 kernel/time/timer.c:2181) 
[ 34.655599][ C3] tmigr_handle_remote_cpu (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:67 ./arch/x86/include/asm/irqflags.h:127 kernel/time/timer_migration.c:925) 
[ 34.655751][ C3] ? __pfx_tmigr_handle_remote_cpu (kernel/time/timer_migration.c:869) 
[ 34.655942][ 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) 
[ 34.656091][ C3] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) 
[ 34.656206][ C3] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[ 34.656358][ C3] tmigr_handle_remote_up (kernel/time/timer_migration.c:1003) 
[ 34.656602][ C3] tmigr_handle_remote (kernel/time/timer_migration.c:488 kernel/time/timer_migration.c:1061) 
[ 34.656755][ C3] ? __pfx_tmigr_handle_remote (kernel/time/timer_migration.c:1026) 
[ 34.656905][ C3] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[ 34.657056][ C3] __do_softirq (kernel/softirq.c:554) 
[ 34.657210][ C3] irq_exit_rcu (kernel/softirq.c:428 kernel/softirq.c:633 kernel/softirq.c:645) 
[ 34.657415][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1043 arch/x86/kernel/apic/apic.c:1043) 
[   34.657565][    C3]  </IRQ>
[   34.657645][    C3]  <TASK>
[ 34.657723][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 34.657909][ C3] RIP: 0010:_raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:160 kernel/locking/spinlock.c:202) 
[ 34.658197][ C3] Code: 44 00 00 55 48 8b 74 24 08 48 89 fd 48 83 c7 18 e8 e5 21 79 fd 48 89 ef e8 1d 92 79 fd e8 98 f0 9c fd fb 65 ff 0d 68 7c 2d 75 <74> 06 5d c3 cc cc cc cc 0f 1f 44 00 00 5d c3 cc cc cc cc 66 66 2e
All code
========
   0:	44 00 00             	add    %r8b,(%rax)
   3:	55                   	push   %rbp
   4:	48 8b 74 24 08       	mov    0x8(%rsp),%rsi
   9:	48 89 fd             	mov    %rdi,%rbp
   c:	48 83 c7 18          	add    $0x18,%rdi
  10:	e8 e5 21 79 fd       	call   0xfffffffffd7921fa
  15:	48 89 ef             	mov    %rbp,%rdi
  18:	e8 1d 92 79 fd       	call   0xfffffffffd79923a
  1d:	e8 98 f0 9c fd       	call   0xfffffffffd9cf0ba
  22:	fb                   	sti
  23:	65 ff 0d 68 7c 2d 75 	decl   %gs:0x752d7c68(%rip)        # 0x752d7c92
  2a:*	74 06                	je     0x32		<-- trapping instruction
  2c:	5d                   	pop    %rbp
  2d:	c3                   	ret
  2e:	cc                   	int3
  2f:	cc                   	int3
  30:	cc                   	int3
  31:	cc                   	int3
  32:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  37:	5d                   	pop    %rbp
  38:	c3                   	ret
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	cc                   	int3
  3c:	cc                   	int3
  3d:	66                   	data16
  3e:	66                   	data16
  3f:	2e                   	cs

Code starting with the faulting instruction
===========================================
   0:	74 06                	je     0x8
   2:	5d                   	pop    %rbp
   3:	c3                   	ret
   4:	cc                   	int3
   5:	cc                   	int3
   6:	cc                   	int3
   7:	cc                   	int3
   8:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
   d:	5d                   	pop    %rbp
   e:	c3                   	ret
   f:	cc                   	int3
  10:	cc                   	int3
  11:	cc                   	int3
  12:	cc                   	int3
  13:	66                   	data16
  14:	66                   	data16
  15:	2e                   	cs
[   34.658824][    C3] RSP: 0018:ffffc9000097f500 EFLAGS: 00000282
[   34.659019][    C3] RAX: 000000000000ae37 RBX: 1ffff9200012fea5 RCX: 1ffffffff1c03e56
[   34.659243][    C3] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8ad64d58
[   34.659560][    C3] RBP: ffff888005cee800 R08: 0000000000000001 R09: fffffbfff1c032a5
[   34.659785][    C3] R10: ffffffff8e01952f R11: ffffc9000097f041 R12: ffff8880024e8fd0
[   34.660010][    C3] R13: 0000000000000000 R14: ffff8880024e8fc8 R15: 0000000000000000
[ 34.660423][ C3] ? _raw_spin_unlock_irq (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:77 ./include/linux/spinlock_api_smp.h:159 kernel/locking/spinlock.c:202) 
[ 34.660574][ C3] p9_tag_alloc (./include/linux/local_lock_internal.h:36 ./include/linux/idr.h:174 net/9p/client.c:321) 
[ 34.660724][ C3] ? __pfx_p9_tag_alloc (net/9p/client.c:277) 
[ 34.660874][ C3] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) 
[ 34.660986][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5137) 
[ 34.661237][ C3] p9_client_prepare_req (net/9p/client.c:641) 
[ 34.661387][ C3] ? __pfx_p9_client_prepare_req (net/9p/client.c:625) 
[ 34.661572][ C3] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 34.661724][ C3] p9_client_rpc (net/9p/client.c:688 (discriminator 4)) 
[ 34.661874][ 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) 
[ 34.662024][ C3] ? __pfx_p9_client_rpc (net/9p/client.c:672) 
[ 34.662176][ C3] ? v9fs_fid_find (fs/9p/fid.c:114) 
[ 34.662326][ 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) 
[ 34.662580][ C3] ? _raw_spin_unlock (./arch/x86/include/asm/preempt.h:94 ./include/linux/spinlock_api_smp.h:143 kernel/locking/spinlock.c:186) 
[ 34.662730][ C3] ? __pfx_v9fs_fid_find (fs/9p/fid.c:114) 
[ 34.662879][ C3] ? __pfx_make_vfsgid (fs/mnt_idmapping.c:110) 
[ 34.663029][ C3] ? _raw_spin_unlock (./arch/x86/include/asm/preempt.h:94 ./include/linux/spinlock_api_smp.h:143 kernel/locking/spinlock.c:186) 
[ 34.663275][ C3] ? v9fs_fid_add (fs/9p/fid.c:41) 
[ 34.663426][ C3] p9_client_readlink (net/9p/client.c:2238) 
[ 34.663576][ C3] v9fs_vfs_get_link_dotl (fs/9p/vfs_inode_dotl.c:822 fs/9p/vfs_inode_dotl.c:806) 
[ 34.663727][ C3] ? __pfx_v9fs_vfs_get_link_dotl (fs/9p/vfs_inode_dotl.c:809) 
[ 34.663917][ C3] ? __lookup_slow (fs/namei.c:1692) 
[ 34.664068][ C3] pick_link (fs/namei.c:1808) 
[ 34.664185][ C3] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 34.664337][ C3] step_into (fs/namei.c:1874) 
[ 34.664451][ C3] ? __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) 
[ 34.664694][ C3] ? __pfx_step_into (fs/namei.c:1839) 
[ 34.664844][ C3] ? walk_component (fs/namei.c:2005) 
[ 34.664996][ C3] link_path_walk.part.0.constprop.0 (fs/namei.c:2331) 
[ 34.665185][ C3] ? __pfx_link_path_walk.part.0.constprop.0 (fs/namei.c:2249) 
[ 34.665473][ C3] path_openat (fs/namei.c:3795) 
[ 34.665624][ C3] ? __pfx_path_openat (fs/namei.c:3781) 
[ 34.665775][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5137) 
[ 34.665926][ C3] do_filp_open (fs/namei.c:3826) 
[ 34.666168][ C3] ? __pfx_do_filp_open (fs/namei.c:3820) 
[ 34.666320][ C3] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 34.666472][ C3] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 34.666622][ C3] ? alloc_fd (fs/file.c:555 (discriminator 10)) 
[ 34.666828][ 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) 
[ 34.666979][ C3] ? _raw_spin_unlock (./arch/x86/include/asm/preempt.h:94 ./include/linux/spinlock_api_smp.h:143 kernel/locking/spinlock.c:186) 
[ 34.667129][ C3] ? alloc_fd (fs/file.c:555 (discriminator 10)) 
[ 34.667245][ C3] do_sys_openat2 (fs/open.c:1406) 
[ 34.667397][ C3] ? __pfx_do_sys_openat2 (fs/open.c:1392) 
[ 34.667639][ C3] ? __pfx___debug_check_no_obj_freed (lib/debugobjects.c:960) 
[ 34.667827][ C3] ? __virt_addr_valid (./arch/x86/include/asm/preempt.h:94 ./include/linux/rcupdate.h:896 ./include/linux/mmzone.h:2029 arch/x86/mm/physaddr.c:65) 
[ 34.667979][ C3] __x64_sys_openat (fs/open.c:1432) 
[ 34.668129][ C3] ? __pfx___x64_sys_openat (fs/open.c:1432) 
[ 34.668376][ C3] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 34.668528][ C3] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[   34.668713][    C3] RIP: 0033:0x7f8b9a0a00e8
[ 34.668867][ 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
[   34.669489][    C3] RSP: 002b:00007ffc28c2c1b8 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
[   34.669814][    C3] RAX: ffffffffffffffda RBX: 00007ffc28c2c43f RCX: 00007f8b9a0a00e8
[   34.670036][    C3] RDX: 0000000000080000 RSI: 00007ffc28c2c230 RDI: 00000000ffffff9c
[   34.670259][    C3] RBP: 00007ffc28c2c220 R08: 0000000000080000 R09: 00007ffc28c2c230
[   34.670574][    C3] R10: 0000000000000000 R11: 0000000000000287 R12: 00007ffc28c2c237


Finger prints:
dump_stack_lvl:mark_lock_irq:mark_lock:mark_usage