======================================
| [ 33.630451][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
| [   33.630651][    C2]
| [   33.630731][    C2]
| [   33.630731][    C2] stack backtrace:
[   33.631269][    C2] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   33.631731][    C2] Call Trace:
[   33.631858][    C2]  <IRQ>
[ 33.631941][ C2] dump_stack_lvl (lib/dump_stack.c:117) 
[ 33.632107][ C2] print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 33.632308][ C2] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 33.632682][ C2] ? __pfx_print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 33.632885][ C2] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) 
[ 33.633046][ C2] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) 
[ 33.633205][ C2] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 33.633471][ C2] mark_lock_irq (kernel/locking/lockdep.c:4244) 
[ 33.633632][ C2] ? __pfx_mark_lock_irq (kernel/locking/lockdep.c:4207) 
[ 33.633793][ C2] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 33.633973][ C2] ? save_trace (kernel/locking/lockdep.c:586) 
[ 33.634246][ C2] mark_lock (kernel/locking/lockdep.c:4678) 
[ 33.634371][ C2] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 33.634536][ C2] mark_usage (kernel/locking/lockdep.c:4567) 
[ 33.634662][ C2] __lock_acquire (kernel/locking/lockdep.c:5091) 
[ 33.634828][ C2] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) 
[ 33.635109][ C2] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 33.635268][ C2] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 33.635430][ C2] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 33.635591][ C2] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 33.635858][ C2] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 33.636022][ C2] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 33.636180][ C2] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 33.636340][ C2] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 33.636501][ C2] _raw_write_lock (./include/linux/rwlock_api_smp.h:210 kernel/locking/spinlock.c:300) 
[ 33.636766][ C2] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 33.636926][ C2] addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 33.637087][ C2] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 33.637248][ C2] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 33.637515][ C2] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 33.637675][ C2] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 33.637835][ C2] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 33.637995][ C2] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 33.638258][ C2] call_timer_fn (kernel/time/timer.c:1793) 
[ 33.638418][ C2] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 33.638577][ C2] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 33.638737][ C2] ? __pfx_call_timer_fn (kernel/time/timer.c:1770) 
[ 33.639023][ 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) 
[ 33.639192][ C2] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[ 33.639357][ C2] __run_timers (kernel/time/timer.c:1845 kernel/time/timer.c:2418) 
[ 33.639522][ C2] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 33.639686][ C2] ? __pfx___run_timers (kernel/time/timer.c:2389) 
[ 33.639958][ 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) 
[ 33.640123][ C2] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 33.640296][ C2] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 33.640456][ C2] ? run_timer_softirq (kernel/time/timer.c:2429 kernel/time/timer.c:2422 kernel/time/timer.c:2438 kernel/time/timer.c:2448) 
[ 33.640725][ C2] run_timer_softirq (kernel/time/timer.c:2430 kernel/time/timer.c:2422 kernel/time/timer.c:2438 kernel/time/timer.c:2448) 
[ 33.640888][ C2] __do_softirq (kernel/softirq.c:554) 
[ 33.641049][ C2] irq_exit_rcu (kernel/softirq.c:428 kernel/softirq.c:633 kernel/softirq.c:645) 
[ 33.641170][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1043 arch/x86/kernel/apic/apic.c:1043) 
[   33.641438][    C2]  </IRQ>
[   33.641522][    C2]  <TASK>
[ 33.641603][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 33.641804][ C2] RIP: 0010:unwind_get_return_address (./arch/x86/include/asm/unwind.h:50 arch/x86/kernel/unwind_orc.c:366) 
[ 33.642010][ C2] Code: 00 00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df <48> 89 fa 55 48 c1 ea 03 53 48 89 fb 0f b6 04 02 84 c0 74 04 3c 03
All code
========
   0:	00 00                	add    %al,(%rax)
   2:	00 0f                	add    %cl,(%rdi)
   4:	1f                   	(bad)
   5:	40 00 90 90 90 90 90 	rex add %dl,-0x6f6f6f70(%rax)
   c:	90                   	nop
   d:	90                   	nop
   e:	90                   	nop
   f:	90                   	nop
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
  16:	90                   	nop
  17:	f3 0f 1e fa          	endbr64
  1b:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  20:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  27:	fc ff df 
  2a:*	48 89 fa             	mov    %rdi,%rdx		<-- trapping instruction
  2d:	55                   	push   %rbp
  2e:	48 c1 ea 03          	shr    $0x3,%rdx
  32:	53                   	push   %rbx
  33:	48 89 fb             	mov    %rdi,%rbx
  36:	0f b6 04 02          	movzbl (%rdx,%rax,1),%eax
  3a:	84 c0                	test   %al,%al
  3c:	74 04                	je     0x42
  3e:	3c 03                	cmp    $0x3,%al

Code starting with the faulting instruction
===========================================
   0:	48 89 fa             	mov    %rdi,%rdx
   3:	55                   	push   %rbp
   4:	48 c1 ea 03          	shr    $0x3,%rdx
   8:	53                   	push   %rbx
   9:	48 89 fb             	mov    %rdi,%rbx
   c:	0f b6 04 02          	movzbl (%rdx,%rax,1),%eax
  10:	84 c0                	test   %al,%al
  12:	74 04                	je     0x18
  14:	3c 03                	cmp    $0x3,%al
[   33.642690][    C2] RSP: 0018:ffffc90000fef220 EFLAGS: 00000202
[   33.642896][    C2] RAX: dffffc0000000000 RBX: ffffffff989c8260 RCX: ffffc90000ff0001
[   33.643243][    C2] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffc90000fef228
[   33.643482][    C2] RBP: ffffc90000fef2c0 R08: ffffc90000fef268 R09: fffff520001fde2e
[   33.643832][    C2] R10: ffffc90000fef228 R11: ffffc90000fef269 R12: ffffc90000fef2f0
[   33.644072][    C2] R13: 0000000000000000 R14: ffff888005670040 R15: ffff88800104fd00
[ 33.644313][ C2] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 33.644618][ C2] arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 33.644780][ C2] ? __dentry_kill (fs/dcache.c:608) 
[ 33.644943][ C2] stack_trace_save (kernel/stacktrace.c:123) 
[ 33.645105][ C2] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 33.645267][ C2] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 33.645640][ C2] set_track_prepare (mm/slub.c:886) 
[ 33.645802][ C2] ? kasan_quarantine_reduce (./include/linux/srcu.h:285 mm/kasan/quarantine.c:287) 
[ 33.645983][ C2] ? __kasan_slab_alloc (mm/kasan/common.c:322) 
[ 33.646147][ C2] ? kmem_cache_alloc (./include/linux/kasan.h:201 mm/slub.c:3798 mm/slub.c:3845 mm/slub.c:3852) 
[ 33.646419][ C2] ? __alloc_object (mm/kmemleak.c:466 mm/kmemleak.c:645) 
[ 33.646584][ C2] ? __create_object (mm/kmemleak.c:750) 
[ 33.646749][ C2] ? __kmalloc (./include/linux/kmemleak.h:42 mm/slub.c:3802 mm/slub.c:3845 mm/slub.c:3965 mm/slub.c:3979) 
[ 33.646915][ C2] ? p9_fcall_init (net/9p/client.c:232) 
[ 33.647195][ C2] ? p9_tag_alloc (net/9p/client.c:295) 
[ 33.647356][ C2] ? p9_client_prepare_req (net/9p/client.c:641) 
[ 33.647516][ C2] ? p9_client_rpc (net/9p/client.c:688 (discriminator 4)) 
[ 33.647676][ C2] ? p9_client_clunk (net/9p/client.c:1438 (discriminator 3)) 
[ 33.647941][ C2] ? v9fs_dentry_release (fs/9p/vfs_dentry.c:54) 
[ 33.648103][ C2] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[ 33.648262][ C2] free_to_partial_list (mm/slub.c:4026) 
[ 33.648423][ C2] ? qlist_free_all (mm/kasan/quarantine.c:163 mm/kasan/quarantine.c:179) 
[ 33.648586][ C2] qlist_free_all (mm/kasan/quarantine.c:174) 
[ 33.648849][ C2] kasan_quarantine_reduce (./include/linux/srcu.h:285 mm/kasan/quarantine.c:287) 
[ 33.649032][ C2] __kasan_slab_alloc (mm/kasan/common.c:322) 
[ 33.649201][ C2] kmem_cache_alloc (./include/linux/kasan.h:201 mm/slub.c:3798 mm/slub.c:3845 mm/slub.c:3852) 
[ 33.649367][ C2] ? p9_fcall_init (net/9p/client.c:232) 
[ 33.649640][ C2] __alloc_object (mm/kmemleak.c:466 mm/kmemleak.c:645) 
[ 33.649805][ C2] ? p9_fcall_init (net/9p/client.c:232) 
[ 33.649970][ C2] __create_object (mm/kmemleak.c:750) 
[ 33.650137][ C2] ? p9_fcall_init (net/9p/client.c:232) 
[ 33.650408][ C2] __kmalloc (./include/linux/kmemleak.h:42 mm/slub.c:3802 mm/slub.c:3845 mm/slub.c:3965 mm/slub.c:3979) 
[ 33.650533][ C2] p9_fcall_init (net/9p/client.c:232) 
[ 33.650698][ C2] p9_tag_alloc (net/9p/client.c:295) 
[ 33.650863][ C2] ? __pfx_p9_tag_alloc (net/9p/client.c:277) 
[ 33.651035][ C2] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3759 kernel/locking/lockdep.c:3782 kernel/locking/lockdep.c:3837) 
[ 33.651307][ 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) 
[ 33.651471][ C2] p9_client_prepare_req (net/9p/client.c:641) 
[ 33.651635][ 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) 
[ 33.651800][ C2] ? __pfx_p9_client_prepare_req (net/9p/client.c:625) 
[ 33.652111][ C2] ? __lock_acquire (kernel/locking/lockdep.c:5137) 
[ 33.652279][ C2] p9_client_rpc (net/9p/client.c:688 (discriminator 4)) 
[ 33.652443][ C2] ? __pfx_p9_client_rpc (net/9p/client.c:672) 
[ 33.652607][ C2] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 33.652883][ C2] ? list_lru_add (mm/list_lru.c:106) 
[ 33.653043][ C2] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 33.653201][ C2] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 33.653363][ C2] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 33.653628][ C2] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 33.653787][ C2] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 33.653947][ C2] p9_client_clunk (net/9p/client.c:1438 (discriminator 3)) 
[ 33.654107][ C2] v9fs_dentry_release (fs/9p/vfs_dentry.c:54) 
[ 33.654370][ C2] __dentry_kill (fs/dcache.c:608) 
[ 33.654529][ C2] ? __pfx_kfree_link (fs/libfs.c:1573) 
[ 33.654691][ C2] dput.part.0 (fs/dcache.c:845) 
[ 33.654849][ C2] walk_component (fs/namei.c:562 fs/namei.c:1027 fs/namei.c:2009) 
[ 33.655012][ C2] link_path_walk.part.0.constprop.0 (fs/namei.c:2328) 
[ 33.655315][ C2] ? __pfx_link_path_walk.part.0.constprop.0 (fs/namei.c:2249) 
[ 33.655515][ C2] path_openat (fs/namei.c:3795) 
[ 33.655675][ C2] ? __pfx_path_openat (fs/namei.c:3781) 
[ 33.655941][ C2] ? __lock_acquire (kernel/locking/lockdep.c:5137) 
[ 33.656101][ C2] do_filp_open (fs/namei.c:3826) 
[ 33.656261][ C2] ? __pfx_do_filp_open (fs/namei.c:3820) 
[ 33.656420][ C2] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 33.656584][ C2] ? __pfx_kfree_link (fs/libfs.c:1573) 
[ 33.656848][ C2] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 33.657009][ C2] ? alloc_fd (fs/file.c:555 (discriminator 10)) 
[ 33.657130][ C2] ? 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) 
[ 33.657289][ C2] ? _raw_spin_unlock (./arch/x86/include/asm/preempt.h:94 ./include/linux/spinlock_api_smp.h:143 kernel/locking/spinlock.c:186) 
[ 33.657551][ C2] ? alloc_fd (fs/file.c:555 (discriminator 10)) 
[ 33.657672][ C2] do_sys_openat2 (fs/open.c:1406) 
[ 33.657830][ C2] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 33.657988][ C2] ? __pfx_do_sys_openat2 (fs/open.c:1392) 
[ 33.658163][ 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) 
[ 33.658531][ C2] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 33.658691][ 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) 
[ 33.658850][ C2] __x64_sys_openat (fs/open.c:1432) 
[ 33.659033][ C2] ? __pfx___x64_sys_openat (fs/open.c:1432) 
[ 33.659306][ C2] ? do_user_addr_fault (./include/linux/rcupdate.h:815 ./include/linux/mm.h:702 arch/x86/mm/fault.c:1364) 
[ 33.659472][ C2] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 33.659638][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[   33.659844][    C2] RIP: 0033:0x7f418327d0e8
[ 33.660121][ C2] 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
[   33.660698][    C2] RSP: 002b:00007ffd22574858 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
[   33.661045][    C2] RAX: ffffffffffffffda RBX: 00007ffd22574aef RCX: 00007f418327d0e8
[   33.661284][    C2] RDX: 0000000000080000 RSI: 00007ffd225748d0 RDI: 00000000ffffff9c
[   33.661626][    C2] RBP: 00007ffd225748c0 R08: 0000000000080000 R09: 00007ffd225748d0
[   33.661865][    C2] R10: 0000000000000000 R11: 0000000000000287 R12: 00007ffd225748d7


Finger prints:
dump_stack_lvl:mark_lock_irq:mark_lock:mark_usage