======================================
| [ 48.834411][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
| [   48.834596][    C2]
| [   48.834669][    C2]
| [   48.834669][    C2] stack backtrace:
[   48.835067][    C2] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   48.835469][    C2] Call Trace:
[   48.835576][    C2]  <IRQ>
[ 48.835650][ C2] dump_stack_lvl (lib/dump_stack.c:117) 
[ 48.835822][ C2] print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 48.835999][ C2] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 48.836231][ C2] ? __pfx_print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 48.836408][ C2] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) 
[ 48.836549][ C2] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) 
[ 48.836693][ C2] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 48.836923][ C2] mark_lock_irq (kernel/locking/lockdep.c:4244) 
[ 48.837067][ C2] ? __pfx_mark_lock_irq (kernel/locking/lockdep.c:4207) 
[ 48.837223][ C2] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 48.837370][ C2] ? save_trace (kernel/locking/lockdep.c:586) 
[ 48.837520][ C2] mark_lock (kernel/locking/lockdep.c:4678) 
[ 48.837628][ C2] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 48.837768][ C2] mark_usage (kernel/locking/lockdep.c:4567) 
[ 48.837877][ C2] __lock_acquire (kernel/locking/lockdep.c:5091) 
[ 48.838021][ C2] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) 
[ 48.838162][ C2] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 48.838309][ C2] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 48.838447][ C2] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 48.838586][ C2] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 48.838810][ C2] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 48.838949][ C2] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 48.839089][ C2] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 48.839227][ C2] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 48.839448][ C2] _raw_write_lock (./include/linux/rwlock_api_smp.h:210 kernel/locking/spinlock.c:300) 
[ 48.839594][ C2] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 48.839732][ C2] addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 48.839871][ C2] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 48.840099][ C2] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 48.840240][ C2] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 48.840383][ C2] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 48.840554][ C2] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 48.840697][ C2] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 48.840922][ C2] call_timer_fn (kernel/time/timer.c:1793) 
[ 48.841066][ C2] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 48.841206][ C2] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 48.841344][ C2] ? __pfx_call_timer_fn (kernel/time/timer.c:1770) 
[ 48.841485][ C2] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) 
[ 48.841595][ C2] __run_timers (kernel/time/timer.c:1845 kernel/time/timer.c:2418) 
[ 48.841736][ C2] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 48.841879][ C2] ? __pfx___run_timers (kernel/time/timer.c:2389) 
[ 48.842021][ 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) 
[ 48.842171][ C2] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 48.842312][ C2] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 48.842453][ C2] ? run_timer_softirq (kernel/time/timer.c:2429 kernel/time/timer.c:2422 kernel/time/timer.c:2438 kernel/time/timer.c:2448) 
[ 48.842594][ C2] run_timer_softirq (kernel/time/timer.c:2430 kernel/time/timer.c:2422 kernel/time/timer.c:2438 kernel/time/timer.c:2448) 
[ 48.842819][ C2] __do_softirq (kernel/softirq.c:554) 
[ 48.842959][ C2] irq_exit_rcu (kernel/softirq.c:428 kernel/softirq.c:633 kernel/softirq.c:645) 
[ 48.843064][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1043 arch/x86/kernel/apic/apic.c:1043) 
[   48.843203][    C2]  </IRQ>
[   48.843292][    C2]  <TASK>
[ 48.843447][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 48.843628][ C2] RIP: 0010:__d_lookup_rcu (./include/linux/rculist_bl.h:24 fs/dcache.c:2201) 
[ 48.843778][ C2] Code: c0 74 08 3c 03 0f 8e a7 02 00 00 f6 45 00 02 0f 85 7f 02 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 80 3c 02 00 <0f> 85 ce 02 00 00 4c 8b 3b e8 d2 8e ed 01 85 c0 0f 85 ca 01 00 00
All code
========
   0:	c0 74 08 3c 03       	shlb   $0x3,0x3c(%rax,%rcx,1)
   5:	0f 8e a7 02 00 00    	jle    0x2b2
   b:	f6 45 00 02          	testb  $0x2,0x0(%rbp)
   f:	0f 85 7f 02 00 00    	jne    0x294
  15:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  1c:	fc ff df 
  1f:	48 89 da             	mov    %rbx,%rdx
  22:	48 c1 ea 03          	shr    $0x3,%rdx
  26:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
  2a:*	0f 85 ce 02 00 00    	jne    0x2fe		<-- trapping instruction
  30:	4c 8b 3b             	mov    (%rbx),%r15
  33:	e8 d2 8e ed 01       	call   0x1ed8f0a
  38:	85 c0                	test   %eax,%eax
  3a:	0f 85 ca 01 00 00    	jne    0x20a

Code starting with the faulting instruction
===========================================
   0:	0f 85 ce 02 00 00    	jne    0x2d4
   6:	4c 8b 3b             	mov    (%rbx),%r15
   9:	e8 d2 8e ed 01       	call   0x1ed8ee0
   e:	85 c0                	test   %eax,%eax
  10:	0f 85 ca 01 00 00    	jne    0x1e0
[   48.844364][    C2] RSP: 0018:ffffc900007cf978 EFLAGS: 00000246
[   48.844545][    C2] RAX: dffffc0000000000 RBX: ffff888035f3c3a8 RCX: 000000000000000f
[   48.844860][    C2] RDX: 1ffff11006be7875 RSI: ffffc900007cfc40 RDI: ffffc900007cfc48
[   48.845075][    C2] RBP: ffff88800143aba0 R08: 0000000000000000 R09: 8080808080808080
[   48.845283][    C2] R10: fefefefefefefeff R11: 9398d0cbc99d9693 R12: ffffc900007cfc40
[   48.845496][    C2] R13: ffff88800143aba0 R14: ffffc900007cfc68 R15: 0000000000000005
[ 48.845708][ C2] ? __pfx_make_vfsuid (fs/mnt_idmapping.c:73) 
[ 48.845862][ C2] lookup_fast (fs/namei.c:1627) 
[ 48.845969][ C2] walk_component (fs/namei.c:2000) 
[ 48.846109][ C2] link_path_walk.part.0.constprop.0 (fs/namei.c:2331) 
[ 48.846286][ C2] ? __pfx_link_path_walk.part.0.constprop.0 (fs/namei.c:2249) 
[ 48.846462][ C2] path_openat (fs/namei.c:3795) 
[ 48.846609][ C2] ? __pfx_path_openat (fs/namei.c:3781) 
[ 48.846750][ C2] ? __lock_acquire (kernel/locking/lockdep.c:5137) 
[ 48.846891][ C2] do_filp_open (fs/namei.c:3826) 
[ 48.847037][ C2] ? __pfx_do_filp_open (fs/namei.c:3820) 
[ 48.847177][ C2] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 48.847407][ 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) 
[ 48.847547][ C2] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 48.847685][ C2] ? alloc_fd (fs/file.c:555 (discriminator 10)) 
[ 48.847792][ 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) 
[ 48.848019][ C2] ? _raw_spin_unlock (./arch/x86/include/asm/preempt.h:94 ./include/linux/spinlock_api_smp.h:143 kernel/locking/spinlock.c:186) 
[ 48.848157][ C2] ? alloc_fd (fs/file.c:555 (discriminator 10)) 
[ 48.848270][ C2] do_sys_openat2 (fs/open.c:1406) 
[ 48.848414][ C2] ? __pfx_do_sys_openat2 (fs/open.c:1392) 
[ 48.848556][ C2] ? user_path_at_empty (fs/namei.c:2925) 
[ 48.848780][ C2] __x64_sys_openat (fs/open.c:1432) 
[ 48.848924][ C2] ? __pfx___x64_sys_openat (fs/open.c:1432) 
[ 48.849061][ C2] ? __pfx_do_faccessat (fs/open.c:465) 
[ 48.849202][ C2] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 48.849512][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[   48.849685][    C2] RIP: 0033:0x7fb04e5500e8
[ 48.849841][ 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
[   48.850429][    C2] RSP: 002b:00007ffc8d151bd8 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
[   48.850660][    C2] RAX: ffffffffffffffda RBX: 00007ffc8d151e6f RCX: 00007fb04e5500e8
[   48.850966][    C2] RDX: 0000000000080000 RSI: 00007ffc8d151c50 RDI: 00000000ffffff9c
[   48.851183][    C2] RBP: 00007ffc8d151c40 R08: 0000000000080000 R09: 00007ffc8d151c50
[   48.851392][    C2] R10: 0000000000000000 R11: 0000000000000287 R12: 00007ffc8d151c57


Finger prints:
dump_stack_lvl:mark_lock_irq:mark_lock:mark_usage