======================================
| [ 44.877789][ C3] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
| [   44.878057][    C3]
| [   44.878166][    C3]
| [   44.878166][    C3] stack backtrace:
[   44.878908][    C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   44.879390][    C3] Call Trace:
[   44.879553][    C3]  <IRQ>
[ 44.879674][ C3] dump_stack_lvl (lib/dump_stack.c:117) 
[ 44.880043][ C3] print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 44.880315][ C3] ? __pfx_print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 44.880586][ C3] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) 
[ 44.880942][ C3] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) 
[ 44.881156][ C3] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 44.881376][ C3] mark_lock_irq (kernel/locking/lockdep.c:4244) 
[ 44.881598][ C3] ? __pfx_mark_lock_irq (kernel/locking/lockdep.c:4207) 
[ 44.881749][ C3] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 44.881978][ C3] ? add_chain_cache (kernel/locking/lockdep.c:3730) 
[ 44.882121][ C3] ? save_trace (kernel/locking/lockdep.c:586) 
[ 44.882263][ C3] mark_lock (kernel/locking/lockdep.c:4678) 
[ 44.882371][ C3] mark_usage (kernel/locking/lockdep.c:4567) 
[ 44.882564][ C3] __lock_acquire (kernel/locking/lockdep.c:5091) 
[ 44.882707][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5137) 
[ 44.882847][ C3] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) bridge
[ 44.883095][ C3] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 44.883325][ C3] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge
[ 44.883538][ C3] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 44.883678][ C3] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 44.883819][ C3] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge
[ 44.884116][ C3] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 44.884257][ C3] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge
[ 44.884470][ C3] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 44.884617][ C3] ? br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge
[ 44.884912][ C3] br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:87) bridge
[ 44.885125][ C3] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) bridge
[ 44.885370][ C3] call_timer_fn (kernel/time/timer.c:1793) 
[ 44.885594][ C3] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 44.885734][ C3] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 44.885874][ C3] ? __pfx_call_timer_fn (kernel/time/timer.c:1770) 
[ 44.886019][ C3] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) 
[ 44.886134][ C3] __run_timers (kernel/time/timer.c:1845 kernel/time/timer.c:2418) 
[ 44.886360][ C3] ? __pfx_br_forward_delay_timer_expired (net/bridge/br_stp_timer.c:80) bridge
[ 44.886607][ C3] ? __pfx___run_timers (kernel/time/timer.c:2389) 
[ 44.886750][ 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) 
[ 44.886975][ C3] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 44.887115][ C3] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 44.887255][ C3] ? run_timer_softirq (kernel/time/timer.c:2429 kernel/time/timer.c:2422 kernel/time/timer.c:2438 kernel/time/timer.c:2448) 
[ 44.887402][ C3] run_timer_softirq (kernel/time/timer.c:2430 kernel/time/timer.c:2422 kernel/time/timer.c:2438 kernel/time/timer.c:2448) 
[ 44.887546][ C3] __do_softirq (kernel/softirq.c:554) 
[ 44.887772][ C3] irq_exit_rcu (kernel/softirq.c:428 kernel/softirq.c:633 kernel/softirq.c:645) 
[ 44.887879][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1043 arch/x86/kernel/apic/apic.c:1043) 
[   44.888020][    C3]  </IRQ>
[   44.888093][    C3]  <TASK>
[ 44.888167][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 44.888434][ C3] RIP: 0010:__d_lookup_rcu (fs/dcache.c:2171) 
[ 44.888581][ C3] Code: 04 24 e8 13 1a f5 ff 48 8b 04 24 eb aa 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <66> 0f 1f 00 0f 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 41 57 41
All code
========
   0:	04 24                	add    $0x24,%al
   2:	e8 13 1a f5 ff       	call   0xfffffffffff51a1a
   7:	48 8b 04 24          	mov    (%rsp),%rax
   b:	eb aa                	jmp    0xffffffffffffffb7
   d:	66 66 2e 0f 1f 84 00 	data16 cs nopw 0x0(%rax,%rax,1)
  14:	00 00 00 00 
  18:	66 90                	xchg   %ax,%ax
  1a:	90                   	nop
  1b:	90                   	nop
  1c:	90                   	nop
  1d:	90                   	nop
  1e:	90                   	nop
  1f:	90                   	nop
  20:	90                   	nop
  21:	90                   	nop
  22:	90                   	nop
  23:	90                   	nop
  24:	90                   	nop
  25:	90                   	nop
  26:	90                   	nop
  27:	90                   	nop
  28:	90                   	nop
  29:	90                   	nop
  2a:*	66 0f 1f 00          	nopw   (%rax)		<-- trapping instruction
  2e:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  33:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  3a:	fc ff df 
  3d:	41 57                	push   %r15
  3f:	41                   	rex.B

Code starting with the faulting instruction
===========================================
   0:	66 0f 1f 00          	nopw   (%rax)
   4:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
   9:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  10:	fc ff df 
  13:	41 57                	push   %r15
  15:	41                   	rex.B
[   44.889171][    C3] RSP: 0018:ffffc9000075f9e0 EFLAGS: 00000202
[   44.889352][    C3] RAX: 0000000000000000 RBX: ffff888006544665 RCX: 00000000b41335e0
[   44.889563][    C3] RDX: ffffc9000075fc74 RSI: ffffc9000075fc40 RDI: ffff8880015ccba0
[   44.889864][    C3] RBP: ffffc9000075fc30 R08: 0000000000000000 R09: 8080808080808080
[   44.890076][    C3] R10: fefefefefefefeff R11: d0918a8dd08d9e89 R12: ffffc9000075fc80
[   44.890290][    C3] R13: ffff8880015ccba0 R14: ffffc9000075fc68 R15: 0000000000000003
[ 44.890588][ C3] lookup_fast (fs/namei.c:1627) 
[ 44.890696][ C3] walk_component (fs/namei.c:2000) 
[ 44.890836][ C3] link_path_walk.part.0.constprop.0 (fs/namei.c:2331) 
[ 44.891017][ C3] ? __pfx_link_path_walk.part.0.constprop.0 (fs/namei.c:2249) 
[ 44.891280][ C3] path_openat (fs/namei.c:3795) 
[ 44.891422][ C3] ? __pfx_path_openat (fs/namei.c:3781) 
[ 44.891574][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5137) 
[ 44.891722][ C3] do_filp_open (fs/namei.c:3826) 
[ 44.891946][ C3] ? __pfx_do_filp_open (fs/namei.c:3820) 
[ 44.892087][ C3] ? find_held_lock (kernel/locking/lockdep.c:5244) 
[ 44.892229][ 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) 
[ 44.892368][ C3] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 44.892599][ C3] ? alloc_fd (fs/file.c:555 (discriminator 10)) 
[ 44.892708][ 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) 
[ 44.892850][ C3] ? _raw_spin_unlock (./arch/x86/include/asm/preempt.h:94 ./include/linux/spinlock_api_smp.h:143 kernel/locking/spinlock.c:186) 
[ 44.892990][ C3] ? alloc_fd (fs/file.c:555 (discriminator 10)) 
[ 44.893099][ C3] do_sys_openat2 (fs/open.c:1406) 
[ 44.893324][ C3] ? __pfx_do_sys_openat2 (fs/open.c:1392) 
[ 44.893465][ C3] ? __pfx___do_sys_newfstatat (fs/stat.c:464) 
[ 44.893609][ C3] __x64_sys_openat (fs/open.c:1432) 
[ 44.893755][ C3] ? __pfx___x64_sys_openat (fs/open.c:1432) 
[ 44.893986][ C3] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 44.894128][ C3] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[   44.894303][    C3] RIP: 0033:0x7f35a68a152c
[ 44.894448][ C3] Code: 24 18 31 c0 41 83 e2 40 75 44 89 f0 25 00 00 41 00 3d 00 00 41 00 74 36 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 44 48 8b 54 24 18 64 48 2b 14 25 28 00 00 00
All code
========
   0:	24 18                	and    $0x18,%al
   2:	31 c0                	xor    %eax,%eax
   4:	41 83 e2 40          	and    $0x40,%r10d
   8:	75 44                	jne    0x4e
   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 36                	je     0x4e
  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 44                	ja     0x76
  32:	48 8b 54 24 18       	mov    0x18(%rsp),%rdx
  37:	64 48 2b 14 25 28 00 	sub    %fs:0x28,%rdx
  3e:	00 00 

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 44                	ja     0x4c
   8:	48 8b 54 24 18       	mov    0x18(%rsp),%rdx
   d:	64 48 2b 14 25 28 00 	sub    %fs:0x28,%rdx
  14:	00 00 
[   44.895037][    C3] RSP: 002b:00007fffe0b5b220 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
[   44.895338][    C3] RAX: ffffffffffffffda RBX: 00007fffe0b5d400 RCX: 00007f35a68a152c
[   44.895547][    C3] RDX: 0000000000090800 RSI: 00000000004711e7 RDI: 00000000ffffff9c
[   44.895757][    C3] RBP: 00007fffe0b629bb R08: 0000000000090800 R09: 00000000004711e7
[   44.896051][    C3] R10: 0000000000000000 R11: 0000000000000287 R12: 0000000000000006


Finger prints:
dump_stack_lvl:mark_lock_irq:mark_lock:mark_usage