======================================
| [ 34.503782][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
| [   34.503979][    C2]
| [   34.504059][    C2]
| [   34.504059][    C2] stack backtrace:
[   34.504516][    C2] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   34.504943][    C2] Call Trace:
[   34.505247][    C2]  <IRQ>
[ 34.505335][ C2] dump_stack_lvl (lib/dump_stack.c:117) 
[ 34.505512][ C2] print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 34.505735][ C2] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 34.505922][ C2] ? __pfx_print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 34.506236][ C2] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) 
[ 34.506395][ C2] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) 
[ 34.506553][ C2] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 34.506725][ C2] mark_lock_irq (kernel/locking/lockdep.c:4244) 
[ 34.507015][ C2] ? __pfx_mark_lock_irq (kernel/locking/lockdep.c:4207) 
[ 34.507179][ C2] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 34.507356][ C2] ? save_trace (kernel/locking/lockdep.c:586) 
[ 34.507517][ C2] mark_lock (kernel/locking/lockdep.c:4678) 
[ 34.507664][ C2] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 34.507825][ C2] mark_usage (kernel/locking/lockdep.c:4567) 
[ 34.507958][ C2] __lock_acquire (kernel/locking/lockdep.c:5091) 
[ 34.508119][ C2] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) 
[ 34.508306][ C2] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 34.508473][ C2] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 34.508663][ C2] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 34.508824][ C2] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 34.508997][ C2] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 34.509157][ C2] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 34.509330][ C2] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 34.509489][ C2] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 34.509697][ C2] _raw_write_lock (./include/linux/rwlock_api_smp.h:210 kernel/locking/spinlock.c:300) 
[ 34.509998][ C2] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 34.510157][ C2] addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 34.510320][ C2] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 34.510481][ C2] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 34.510651][ C2] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 34.510811][ C2] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 34.510969][ C2] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 34.511128][ C2] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 34.511286][ C2] call_timer_fn (kernel/time/timer.c:1793) 
[ 34.511448][ C2] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 34.511618][ C2] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 34.511803][ C2] ? __pfx_call_timer_fn (kernel/time/timer.c:1770) 
[ 34.511964][ C2] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 34.512139][ C2] __run_timers (kernel/time/timer.c:1845 kernel/time/timer.c:2418) 
[ 34.512300][ C2] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 34.512475][ C2] ? __pfx___run_timers (kernel/time/timer.c:2389) 
[ 34.512657][ C2] ? 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) 
[ 34.512974][ C2] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 34.513139][ C2] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 34.513314][ C2] ? run_timer_softirq (kernel/time/timer.c:2429 kernel/time/timer.c:2422 kernel/time/timer.c:2438 kernel/time/timer.c:2448) 
[ 34.513476][ C2] run_timer_softirq (kernel/time/timer.c:2430 kernel/time/timer.c:2422 kernel/time/timer.c:2438 kernel/time/timer.c:2448) 
[ 34.513688][ C2] __do_softirq (kernel/softirq.c:554) 
[ 34.513909][ C2] irq_exit_rcu (kernel/softirq.c:428 kernel/softirq.c:633 kernel/softirq.c:645) 
[ 34.514043][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1043 arch/x86/kernel/apic/apic.c:1043) 
[   34.514203][    C2]  </IRQ>
[   34.514297][    C2]  <TASK>
[ 34.514381][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 34.514592][ C2] RIP: 0010:orc_find.part.0 (arch/x86/kernel/unwind_orc.c:209) 
[ 34.514777][ C2] Code: 00 00 fc ff df 48 83 ec 10 49 81 fc 00 00 a0 aa 0f 82 f3 00 00 00 49 81 fc 00 00 80 ad 0f 83 e6 00 00 00 44 8b 2d d9 56 52 03 <4c> 89 e3 48 81 eb 00 00 a0 aa 48 c1 eb 08 41 8d 45 ff 89 dd 39 c3
All code
========
   0:	00 00                	add    %al,(%rax)
   2:	fc                   	cld
   3:	ff                   	(bad)
   4:	df 48 83             	fisttps -0x7d(%rax)
   7:	ec                   	in     (%dx),%al
   8:	10 49 81             	adc    %cl,-0x7f(%rcx)
   b:	fc                   	cld
   c:	00 00                	add    %al,(%rax)
   e:	a0 aa 0f 82 f3 00 00 	movabs 0x49000000f3820faa,%al
  15:	00 49 
  17:	81 fc 00 00 80 ad    	cmp    $0xad800000,%esp
  1d:	0f 83 e6 00 00 00    	jae    0x109
  23:	44 8b 2d d9 56 52 03 	mov    0x35256d9(%rip),%r13d        # 0x3525703
  2a:*	4c 89 e3             	mov    %r12,%rbx		<-- trapping instruction
  2d:	48 81 eb 00 00 a0 aa 	sub    $0xffffffffaaa00000,%rbx
  34:	48 c1 eb 08          	shr    $0x8,%rbx
  38:	41 8d 45 ff          	lea    -0x1(%r13),%eax
  3c:	89 dd                	mov    %ebx,%ebp
  3e:	39 c3                	cmp    %eax,%ebx

Code starting with the faulting instruction
===========================================
   0:	4c 89 e3             	mov    %r12,%rbx
   3:	48 81 eb 00 00 a0 aa 	sub    $0xffffffffaaa00000,%rbx
   a:	48 c1 eb 08          	shr    $0x8,%rbx
   e:	41 8d 45 ff          	lea    -0x1(%r13),%eax
  12:	89 dd                	mov    %ebx,%ebp
  14:	39 c3                	cmp    %eax,%ebx
[   34.515409][    C2] RSP: 0018:ffffc9000094f160 EFLAGS: 00000287
[   34.515649][    C2] RAX: dffffc0000000000 RBX: dffffc0000000000 RCX: ffffc90000950001
[   34.515907][    C2] RDX: 1ffff92000129e5f RSI: ffffffffab8e1319 RDI: ffffffffab8e1318
[   34.516291][    C2] RBP: ffffc9000094f2f8 R08: ffffc9000094f2e0 R09: 1ffff92000129e3d
[   34.516551][    C2] R10: ffffc9000094f2a0 R11: ffffc9000094f2e1 R12: ffffffffab8e1318
[   34.516816][    C2] R13: 000000000002e001 R14: 0000000000000000 R15: ffffffffad3b52ad
[ 34.517266][ C2] ? p9_fcall_init (net/9p/client.c:232) 
[ 34.517493][ C2] ? v9fs_dentry_release (./include/net/9p/client.h:278 fs/9p/vfs_dentry.c:55) 
[ 34.517771][ C2] ? v9fs_dentry_release (fs/9p/vfs_dentry.c:54) 
[ 34.517961][ C2] ? v9fs_dentry_release (./include/net/9p/client.h:278 fs/9p/vfs_dentry.c:55) 
[ 34.518137][ C2] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 34.518303][ C2] unwind_next_frame (arch/x86/kernel/unwind_orc.c:495) 
[ 34.518472][ C2] ? v9fs_dentry_release (fs/9p/vfs_dentry.c:54) 
[ 34.518669][ C2] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 34.518863][ C2] ? v9fs_dentry_release (fs/9p/vfs_dentry.c:54) 
[ 34.519028][ C2] ? kernel_text_address (kernel/extable.c:99) 
[ 34.519191][ C2] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 34.519391][ C2] ? p9_fcall_init (net/9p/client.c:232) 
[ 34.519550][ C2] arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 34.519723][ C2] ? v9fs_dentry_release (fs/9p/vfs_dentry.c:54) 
[ 34.519887][ C2] stack_trace_save (kernel/stacktrace.c:123) 
[ 34.520046][ C2] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 34.520311][ C2] ? ___slab_alloc (mm/slub.c:2583 mm/slub.c:2701 mm/slub.c:3505) 
[ 34.520490][ C2] ? fs_reclaim_acquire (mm/page_alloc.c:3715 mm/page_alloc.c:3706) 
[ 34.520662][ C2] ? __alloc_object (mm/kmemleak.c:466 mm/kmemleak.c:645) 
[ 34.520854][ C2] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 34.521148][ C2] set_track_prepare (mm/slub.c:889) 
[ 34.521324][ C2] ? __pfx_set_track_prepare (mm/slub.c:880) 
[ 34.521519][ C2] ? __kmalloc (./include/linux/kmemleak.h:42 mm/slub.c:3802 mm/slub.c:3845 mm/slub.c:3965 mm/slub.c:3979) 
[ 34.521770][ C2] ? p9_fcall_init (net/9p/client.c:232) 
[ 34.522219][ C2] ? p9_tag_alloc (net/9p/client.c:295) 
[ 34.522480][ C2] ? p9_client_prepare_req (net/9p/client.c:641) 
[ 34.522681][ C2] ? p9_client_rpc (net/9p/client.c:688 (discriminator 4)) 
[ 34.522841][ C2] ? p9_client_clunk (net/9p/client.c:1438 (discriminator 3)) 
[ 34.523016][ C2] ? v9fs_dentry_release (fs/9p/vfs_dentry.c:54) 
[ 34.523280][ C2] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 34.523456][ C2] ? lockdep_init_map_type (kernel/locking/lockdep.c:4892) 
[ 34.523660][ C2] ? p9_fcall_init (net/9p/client.c:232) 
[ 34.523829][ C2] ? __raw_spin_lock_init (kernel/locking/spinlock_debug.c:27) 
[ 34.524110][ C2] __alloc_object (mm/kmemleak.c:681) 
[ 34.524284][ C2] ? p9_fcall_init (net/9p/client.c:232) 
[ 34.524448][ C2] __create_object (mm/kmemleak.c:750) 
[ 34.524637][ C2] ? p9_fcall_init (net/9p/client.c:232) 
[ 34.524947][ C2] __kmalloc (./include/linux/kmemleak.h:42 mm/slub.c:3802 mm/slub.c:3845 mm/slub.c:3965 mm/slub.c:3979) 
[ 34.525081][ C2] p9_fcall_init (net/9p/client.c:232) 
[ 34.525248][ C2] p9_tag_alloc (net/9p/client.c:295) 
[ 34.525444][ C2] ? __pfx_p9_tag_alloc (net/9p/client.c:277) 
[ 34.525618][ C2] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) 
[ 34.525805][ C2] ? 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) 
[ 34.525981][ C2] p9_client_prepare_req (net/9p/client.c:641) 
[ 34.526145][ C2] ? 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) 
[ 34.526323][ C2] ? __pfx_p9_client_prepare_req (net/9p/client.c:625) 
[ 34.526531][ C2] ? __lock_acquire (kernel/locking/lockdep.c:5137) 
[ 34.526713][ C2] p9_client_rpc (net/9p/client.c:688 (discriminator 4)) 
[ 34.526873][ C2] ? __pfx_p9_client_rpc (net/9p/client.c:672) 
[ 34.527046][ C2] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 34.527205][ C2] ? list_lru_add (mm/list_lru.c:106) 
[ 34.527375][ C2] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 34.527535][ C2] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 34.527760][ C2] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 34.528025][ C2] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 34.528185][ C2] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 34.528346][ C2] p9_client_clunk (net/9p/client.c:1438 (discriminator 3)) 
[ 34.528524][ C2] v9fs_dentry_release (fs/9p/vfs_dentry.c:54) 
[ 34.528826][ C2] __dentry_kill (fs/dcache.c:608) 
[ 34.528993][ C2] ? __pfx_kfree_link (fs/libfs.c:1573) 
[ 34.529170][ C2] dput.part.0 (fs/dcache.c:845) 
[ 34.529328][ C2] walk_component (fs/namei.c:562 fs/namei.c:1027 fs/namei.c:2009) 
[ 34.529509][ C2] link_path_walk.part.0.constprop.0 (fs/namei.c:2328) 
[ 34.529851][ C2] ? __pfx_link_path_walk.part.0.constprop.0 (fs/namei.c:2249) 
[ 34.530064][ C2] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) 
[ 34.530228][ C2] ? 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) 
[ 34.530642][ C2] path_lookupat (fs/namei.c:2254 (discriminator 2) fs/namei.c:2484 (discriminator 2)) 
[ 34.530805][ C2] filename_lookup (fs/namei.c:2514) 
[ 34.530984][ C2] ? __pfx_filename_lookup (fs/namei.c:2508) 
[ 34.531152][ C2] ? __pfx_kfree_link (fs/libfs.c:1573) 
[ 34.531313][ C2] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 34.531580][ C2] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 34.531751][ C2] ? __might_fault (mm/memory.c:6216 mm/memory.c:6209) 
[ 34.531928][ C2] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 34.532087][ C2] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 34.532369][ C2] vfs_statx (fs/stat.c:244) 
[ 34.532515][ C2] ? __pfx_vfs_statx (fs/stat.c:234) 
[ 34.532727][ C2] ? 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) 
[ 34.532888][ C2] vfs_fstatat (fs/stat.c:305) 
[ 34.533009][ C2] __do_sys_newfstatat (fs/stat.c:469) 
[ 34.533289][ C2] ? __pfx___do_sys_newfstatat (fs/stat.c:464) 
[ 34.533459][ C2] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 34.533654][ C2] ? __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) 
[ 34.533845][ C2] ? __pfx___up_read (kernel/locking/rwsem.c:1339) 
[ 34.534120][ C2] ? do_user_addr_fault (./include/linux/rcupdate.h:339 ./include/linux/rcupdate.h:814 ./include/linux/mm.h:702 arch/x86/mm/fault.c:1364) 
[ 34.534305][ C2] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 34.534536][ C2] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 34.534720][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[   34.535088][    C2] RIP: 0033:0x7f4a70805eee
[ 34.535271][ C2] 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 48 8b 15 d9
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:	48                   	rex.W
  3d:	8b                   	.byte 0x8b
  3e:	15                   	.byte 0x15
  3f:	d9                   	.byte 0xd9

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:	48                   	rex.W
  13:	8b                   	.byte 0x8b
  14:	15                   	.byte 0x15
  15:	d9                   	.byte 0xd9
[   34.535890][    C2] RSP: 002b:00007ffc01de8f18 EFLAGS: 00000246 ORIG_RAX: 0000000000000106
[   34.536155][    C2] RAX: ffffffffffffffda RBX: 0000000000000024 RCX: 00007f4a70805eee
[   34.536408][    C2] RDX: 00007ffc01de8f20 RSI: 0000562d808ef9e0 RDI: 00000000ffffff9c
[   34.536668][    C2] RBP: 0000562d808ef9e0 R08: 00007ffc01de9048 R09: 0000562d8090d364
[   34.536925][    C2] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000


Finger prints:
dump_stack_lvl:mark_lock_irq:mark_lock:mark_usage