======================================
| [ 43.809911][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
| [   43.810116][    C2]
| [   43.810198][    C2]
| [   43.810198][    C2] stack backtrace:
[   43.810754][    C2] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   43.811121][    C2] Call Trace:
[   43.811359][    C2]  <IRQ>
[ 43.811449][ C2] dump_stack_lvl (lib/dump_stack.c:117) 
[ 43.811619][ C2] print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 43.811826][ C2] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 43.811998][ C2] ? __pfx_print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 43.812314][ C2] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) 
[ 43.812479][ C2] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) 
[ 43.812643][ C2] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 43.812810][ C2] mark_lock_irq (kernel/locking/lockdep.c:4244) 
[ 43.813089][ C2] ? __pfx_mark_lock_irq (kernel/locking/lockdep.c:4207) 
[ 43.813254][ C2] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 43.813421][ C2] ? save_trace (kernel/locking/lockdep.c:586) 
[ 43.813589][ C2] mark_lock (kernel/locking/lockdep.c:4678) 
[ 43.813824][ C2] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 43.813989][ C2] mark_usage (kernel/locking/lockdep.c:4567) 
[ 43.814115][ C2] __lock_acquire (kernel/locking/lockdep.c:5091) 
[ 43.814283][ C2] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) 
[ 43.814454][ C2] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 43.814731][ C2] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 43.814896][ C2] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 43.815061][ C2] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 43.815229][ C2] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 43.815503][ C2] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 43.815674][ C2] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 43.815839][ C2] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 43.816005][ C2] _raw_write_lock (./include/linux/rwlock_api_smp.h:210 kernel/locking/spinlock.c:300) 
[ 43.816282][ C2] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 43.816446][ C2] addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 43.816612][ C2] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 43.816779][ C2] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 43.817058][ C2] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 43.817226][ C2] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 43.817390][ C2] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 43.817555][ C2] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 43.817721][ C2] call_timer_fn (kernel/time/timer.c:1793) 
[ 43.817999][ C2] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 43.818171][ C2] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 43.818336][ C2] ? __pfx_call_timer_fn (kernel/time/timer.c:1770) 
[ 43.818500][ C2] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) 
[ 43.818742][ C2] __run_timers (kernel/time/timer.c:1845 kernel/time/timer.c:2418) 
[ 43.818905][ C2] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 43.819071][ C2] ? __pfx___run_timers (kernel/time/timer.c:2389) 
[ 43.819236][ C2] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 43.819515][ 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) 
[ 43.819680][ C2] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 43.819846][ C2] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 43.820011][ C2] ? timer_expire_remote (kernel/time/timer.c:2429 kernel/time/timer.c:2422 kernel/time/timer.c:2181) 
[ 43.820177][ C2] timer_expire_remote (kernel/time/timer.c:2430 kernel/time/timer.c:2422 kernel/time/timer.c:2181) 
[ 43.820451][ C2] 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) 
[ 43.820616][ C2] ? __pfx_tmigr_handle_remote_cpu (kernel/time/timer_migration.c:869) 
[ 43.820831][ C2] tmigr_handle_remote_up (kernel/time/timer_migration.c:1003) 
[ 43.821000][ C2] tmigr_handle_remote (kernel/time/timer_migration.c:488 kernel/time/timer_migration.c:1061) 
[ 43.821273][ 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) 
[ 43.821437][ C2] ? __pfx_tmigr_handle_remote (kernel/time/timer_migration.c:1026) 
[ 43.821602][ C2] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 43.821767][ C2] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4292 kernel/locking/lockdep.c:4359) 
[ 43.822084][ C2] __do_softirq (kernel/softirq.c:554) 
[ 43.822251][ C2] irq_exit_rcu (kernel/softirq.c:428 kernel/softirq.c:633 kernel/softirq.c:645) 
[ 43.822380][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1043 arch/x86/kernel/apic/apic.c:1043) 
[   43.822545][    C2]  </IRQ>
[   43.822630][    C2]  <TASK>
[ 43.822934][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 43.823139][ C2] RIP: 0010:orc_find.part.0 (arch/x86/kernel/unwind_orc.c:198) 
[ 43.823310][ C2] Code: 84 00 eb c0 48 89 ef e8 83 1f 84 00 eb da 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 44 00 00 41 56 41 55 41 54 <49> 89 fc 55 53 48 bb 00 00 00 00 00 fc ff df 48 83 ec 10 49 81 fc
All code
========
   0:	84 00                	test   %al,(%rax)
   2:	eb c0                	jmp    0xffffffffffffffc4
   4:	48 89 ef             	mov    %rbp,%rdi
   7:	e8 83 1f 84 00       	call   0x841f8f
   c:	eb da                	jmp    0xffffffffffffffe8
   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:	90                   	nop
  18:	90                   	nop
  19:	90                   	nop
  1a:	90                   	nop
  1b:	90                   	nop
  1c:	90                   	nop
  1d:	90                   	nop
  1e:	90                   	nop
  1f:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  24:	41 56                	push   %r14
  26:	41 55                	push   %r13
  28:	41 54                	push   %r12
  2a:*	49 89 fc             	mov    %rdi,%r12		<-- trapping instruction
  2d:	55                   	push   %rbp
  2e:	53                   	push   %rbx
  2f:	48 bb 00 00 00 00 00 	movabs $0xdffffc0000000000,%rbx
  36:	fc ff df 
  39:	48 83 ec 10          	sub    $0x10,%rsp
  3d:	49                   	rex.WB
  3e:	81                   	.byte 0x81
  3f:	fc                   	cld

Code starting with the faulting instruction
===========================================
   0:	49 89 fc             	mov    %rdi,%r12
   3:	55                   	push   %rbp
   4:	53                   	push   %rbx
   5:	48 bb 00 00 00 00 00 	movabs $0xdffffc0000000000,%rbx
   c:	fc ff df 
   f:	48 83 ec 10          	sub    $0x10,%rsp
  13:	49                   	rex.WB
  14:	81                   	.byte 0x81
  15:	fc                   	cld
[   43.824010][    C2] RSP: 0018:ffffc90000b4efd0 EFLAGS: 00000282
[   43.824220][    C2] RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffc90000b50001
[   43.824581][    C2] RDX: 1ffff92000169e29 RSI: ffffffffa9dc065c RDI: ffffffffa9dc065b
[   43.824829][    C2] RBP: ffffc90000b4f148 R08: ffffc90000b4f130 R09: 1ffff92000169e07
[   43.825075][    C2] R10: ffffc90000b4f0f0 R11: ffffc90000b4f131 R12: 1ffff92000169e07
[   43.825440][    C2] R13: ffffc90000b4f0f0 R14: 0000000000000000 R15: ffffffffabbb52ad
[ 43.825693][ C2] ? p9_fcall_init (net/9p/client.c:232) 
[ 43.825860][ C2] ? do_dentry_open (fs/open.c:955) 
[ 43.826025][ C2] ? do_dentry_open (fs/open.c:955) 
[ 43.826300][ C2] unwind_next_frame (arch/x86/kernel/unwind_orc.c:495) 
[ 43.826465][ C2] ? do_dentry_open (fs/open.c:955) 
[ 43.826631][ C2] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 43.826802][ C2] ? do_dentry_open (fs/open.c:955) 
[ 43.827075][ C2] ? kernel_text_address (kernel/extable.c:99) 
[ 43.827243][ C2] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 43.827448][ C2] ? p9_fcall_init (net/9p/client.c:232) 
[ 43.827612][ C2] arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 43.827918][ C2] ? do_dentry_open (fs/open.c:955) 
[ 43.828093][ C2] stack_trace_save (kernel/stacktrace.c:123) 
[ 43.828259][ C2] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 43.828427][ C2] ? ___slab_alloc (mm/slub.c:2583 mm/slub.c:2701 mm/slub.c:3505) 
[ 43.828716][ C2] ? fs_reclaim_acquire (mm/page_alloc.c:3715 mm/page_alloc.c:3706) 
[ 43.828882][ C2] ? __alloc_object (mm/kmemleak.c:466 mm/kmemleak.c:645) 
[ 43.829047][ C2] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 43.829214][ C2] set_track_prepare (mm/slub.c:889) 
[ 43.829492][ C2] ? __pfx_set_track_prepare (mm/slub.c:880) 
[ 43.829658][ C2] ? __kmalloc (./include/linux/kmemleak.h:42 mm/slub.c:3802 mm/slub.c:3845 mm/slub.c:3965 mm/slub.c:3979) 
[ 43.829826][ C2] ? p9_fcall_init (net/9p/client.c:232) 
[ 43.829990][ C2] ? p9_tag_alloc (net/9p/client.c:297) 
[ 43.830161][ C2] ? p9_client_prepare_req (net/9p/client.c:641) 
[ 43.830435][ C2] ? p9_client_rpc (net/9p/client.c:688 (discriminator 4)) 
[ 43.830603][ C2] ? p9_client_open (net/9p/client.c:1232) 
[ 43.830769][ C2] ? v9fs_file_open (fs/9p/vfs_file.c:71) 
[ 43.830935][ C2] ? do_dentry_open (fs/open.c:955) 
[ 43.831208][ C2] ? backing_file_open (fs/backing-file.c:45) 
[ 43.831373][ C2] ? ovl_open_realfile (fs/overlayfs/file.c:54) 
[ 43.831538][ C2] ? ovl_open (fs/overlayfs/file.c:169) 
[ 43.831662][ C2] ? do_dentry_open (fs/open.c:955) 
[ 43.831941][ C2] ? p9_fcall_init (net/9p/client.c:232) 
[ 43.832108][ C2] ? __raw_spin_lock_init (kernel/locking/spinlock_debug.c:27) 
[ 43.832274][ C2] __alloc_object (mm/kmemleak.c:681) 
[ 43.832445][ C2] ? p9_fcall_init (net/9p/client.c:232) 
[ 43.832612][ C2] __create_object (mm/kmemleak.c:750) 
[ 43.832890][ C2] ? p9_fcall_init (net/9p/client.c:232) 
[ 43.833054][ C2] __kmalloc (./include/linux/kmemleak.h:42 mm/slub.c:3802 mm/slub.c:3845 mm/slub.c:3965 mm/slub.c:3979) 
[ 43.833180][ C2] p9_fcall_init (net/9p/client.c:232) 
[ 43.833346][ C2] p9_tag_alloc (net/9p/client.c:297) 
[ 43.833629][ C2] ? __pfx_p9_tag_alloc (net/9p/client.c:277) 
[ 43.833798][ C2] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 43.833964][ C2] ? __debug_check_no_obj_freed (lib/debugobjects.c:1000) 
[ 43.834171][ C2] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 43.834452][ C2] p9_client_prepare_req (net/9p/client.c:641) 
[ 43.834624][ C2] ? __pfx_p9_client_prepare_req (net/9p/client.c:625) 
[ 43.834832][ C2] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 43.835040][ C2] ? __debug_check_no_obj_freed (lib/debugobjects.c:1000) 
[ 43.835354][ C2] p9_client_rpc (net/9p/client.c:688 (discriminator 4)) 
[ 43.835521][ C2] ? __pfx___debug_check_no_obj_freed (lib/debugobjects.c:960) 
[ 43.835736][ C2] ? __pfx_p9_client_rpc (net/9p/client.c:672) 
[ 43.835903][ C2] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 43.836329][ C2] ? kmem_cache_free (mm/slub.c:4280 mm/slub.c:4344) 
[ 43.836499][ C2] ? p9_req_put (net/9p/client.c:410) 
[ 43.836663][ C2] ? trace_kfree (./include/trace/events/kmem.h:94 (discriminator 52)) 
[ 43.836833][ C2] ? kfree (mm/slub.c:4379) 
[ 43.837068][ C2] p9_client_open (net/9p/client.c:1232) 
[ 43.837238][ C2] ? __pfx_p9_client_open (net/9p/client.c:1217) 
[ 43.837404][ C2] ? v9fs_fid_lookup_with_uid (fs/9p/fid.c:181) 
[ 43.837579][ C2] v9fs_file_open (fs/9p/vfs_file.c:71) 
[ 43.837854][ C2] ? __pfx_v9fs_file_open (fs/9p/vfs_file.c:41) 
[ 43.838021][ C2] ? do_dentry_open (fs/open.c:912) 
[ 43.838187][ C2] do_dentry_open (fs/open.c:955) 
[ 43.838359][ C2] ? __pfx_v9fs_file_open (fs/9p/vfs_file.c:41) 
[ 43.838637][ C2] ? backing_file_open (fs/backing-file.c:44) 
[ 43.838810][ C2] backing_file_open (fs/backing-file.c:45) 
[ 43.838976][ C2] ? inode_owner_or_capable (./include/linux/mnt_idmapping.h:81 fs/inode.c:2381) 
[ 43.839149][ C2] ovl_open_realfile (fs/overlayfs/file.c:54) 
[ 43.839317][ C2] ovl_open (fs/overlayfs/file.c:169) 
[ 43.839559][ C2] ? __pfx_ovl_open (fs/overlayfs/file.c:146) 
[ 43.839722][ C2] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 43.839887][ C2] ? do_dentry_open (fs/open.c:912) 
[ 43.840063][ C2] do_dentry_open (fs/open.c:955) 
[ 43.840337][ C2] ? __pfx_ovl_open (fs/overlayfs/file.c:146) 
[ 43.840506][ C2] ? may_open (fs/namei.c:3270) 
[ 43.840631][ C2] do_open (fs/namei.c:3643) 
[ 43.840758][ C2] path_openat (fs/namei.c:3799) 
[ 43.840926][ C2] ? __pfx_path_openat (fs/namei.c:3781) 
[ 43.841199][ C2] ? __lock_acquire (kernel/locking/lockdep.c:5137) 
[ 43.841366][ C2] do_filp_open (fs/namei.c:3826) 
[ 43.841536][ C2] ? __pfx_do_filp_open (fs/namei.c:3820) 
[ 43.841713][ C2] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 43.841995][ C2] ? __pfx_kfree_link (fs/libfs.c:1573) 
[ 43.842160][ C2] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 43.842330][ C2] ? alloc_fd (fs/file.c:555 (discriminator 10)) 
[ 43.842459][ C2] ? _raw_spin_unlock (./arch/x86/include/asm/preempt.h:94 ./include/linux/spinlock_api_smp.h:143 kernel/locking/spinlock.c:186) 
[ 43.842627][ C2] ? alloc_fd (fs/file.c:555 (discriminator 10)) 
[ 43.842861][ C2] do_sys_openat2 (fs/open.c:1406) 
[ 43.843030][ C2] ? __pfx_do_sys_openat2 (fs/open.c:1392) 
[ 43.843194][ C2] ? __pfx___debug_check_no_obj_freed (lib/debugobjects.c:960) 
[ 43.843406][ C2] ? __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) 
[ 43.843690][ C2] __x64_sys_openat (fs/open.c:1432) 
[ 43.843858][ C2] ? __pfx___x64_sys_openat (fs/open.c:1432) 
[ 43.844032][ C2] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 43.844201][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[   43.844521][    C2] RIP: 0033:0x7fa3f163e0e8
[ 43.844694][ 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
[   43.845409][    C2] RSP: 002b:00007ffcfafd7058 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
[   43.845690][    C2] RAX: ffffffffffffffda RBX: 00007ffcfafd72df RCX: 00007fa3f163e0e8
[   43.845938][    C2] RDX: 0000000000080000 RSI: 00007ffcfafd70d0 RDI: 00000000ffffff9c
[   43.846299][    C2] RBP: 00007ffcfafd70c0 R08: 0000000000080000 R09: 00007ffcfafd70d0
[   43.846551][    C2] R10: 0000000000000000 R11: 0000000000000287 R12: 00007ffcfafd70d7


Finger prints:
dump_stack_lvl:mark_lock_irq:mark_lock:mark_usage