======================================
| [ 34.708054][ C2] asm_exc_page_fault (./arch/x86/include/asm/idtentry.h:623) 
| [   34.708208][    C2]
| [   34.708284][    C2]
| [   34.708284][    C2] stack backtrace:
[   34.708783][    C2] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   34.709200][    C2] Call Trace:
[   34.709325][    C2]  <IRQ>
[ 34.709405][ C2] dump_stack_lvl (lib/dump_stack.c:117) 
[ 34.709560][ C2] print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 34.709750][ C2] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 34.709987][ C2] ? __pfx_print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 34.710178][ C2] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) 
[ 34.710329][ C2] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) 
[ 34.710484][ C2] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 34.710718][ C2] mark_lock_irq (kernel/locking/lockdep.c:4244) 
[ 34.710877][ C2] ? __pfx_mark_lock_irq (kernel/locking/lockdep.c:4207) 
[ 34.711031][ C2] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 34.711188][ C2] ? save_trace (kernel/locking/lockdep.c:586) 
[ 34.711426][ C2] mark_lock (kernel/locking/lockdep.c:4678) 
[ 34.711544][ C2] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 34.711700][ C2] mark_usage (kernel/locking/lockdep.c:4567) 
[ 34.711818][ C2] __lock_acquire (kernel/locking/lockdep.c:5091) 
[ 34.711973][ C2] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) 
[ 34.712210][ C2] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 34.712363][ C2] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 34.712516][ C2] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 34.712673][ C2] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 34.712908][ C2] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 34.713061][ C2] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 34.713215][ C2] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 34.713368][ C2] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 34.713603][ C2] _raw_write_lock (./include/linux/rwlock_api_smp.h:210 kernel/locking/spinlock.c:300) 
[ 34.713755][ C2] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 34.713908][ C2] addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 34.714076][ C2] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 34.714228][ C2] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 34.714462][ C2] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 34.714613][ C2] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 34.714769][ C2] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 34.714926][ C2] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 34.715160][ C2] call_timer_fn (kernel/time/timer.c:1793) 
[ 34.715313][ C2] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 34.715467][ C2] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 34.715621][ C2] ? __pfx_call_timer_fn (kernel/time/timer.c:1770) 
[ 34.715855][ 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) 
[ 34.716010][ C2] ? mark_held_locks (kernel/locking/lockdep.c:4274) 
[ 34.716163][ C2] __run_timers (kernel/time/timer.c:1845 kernel/time/timer.c:2418) 
[ 34.716315][ C2] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 34.716555][ C2] ? __pfx___run_timers (kernel/time/timer.c:2389) 
[ 34.716709][ 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) 
[ 34.716861][ C2] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 34.717015][ C2] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 34.717167][ C2] ? run_timer_softirq (kernel/time/timer.c:2429 kernel/time/timer.c:2422 kernel/time/timer.c:2438 kernel/time/timer.c:2448) 
[ 34.717324][ C2] run_timer_softirq (kernel/time/timer.c:2430 kernel/time/timer.c:2422 kernel/time/timer.c:2438 kernel/time/timer.c:2448) 
[ 34.717478][ C2] __do_softirq (kernel/softirq.c:554) 
[ 34.717634][ C2] irq_exit_rcu (kernel/softirq.c:428 kernel/softirq.c:633 kernel/softirq.c:645) 
[ 34.717750][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1043 arch/x86/kernel/apic/apic.c:1043) 
[   34.717984][    C2]  </IRQ>
[   34.718065][    C2]  <TASK>
[ 34.718143][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 34.718333][ C2] RIP: 0010:rcu_is_watching (./include/linux/context_tracking.h:122 kernel/rcu/tree.c:700) 
[ 34.718493][ C2] Code: 66 2e 0f 1f 84 00 00 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 53 65 ff 05 cc 57 2c 48 <65> 48 8b 1d 14 a8 2a 48 48 8d bb e0 84 03 00 48 b8 00 00 00 00 00
All code
========
   0:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   7:	00 00 00 
   a:	0f 1f 40 00          	nopl   0x0(%rax)
   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:	f3 0f 1e fa          	endbr64
  22:	53                   	push   %rbx
  23:	65 ff 05 cc 57 2c 48 	incl   %gs:0x482c57cc(%rip)        # 0x482c57f6
  2a:*	65 48 8b 1d 14 a8 2a 	mov    %gs:0x482aa814(%rip),%rbx        # 0x482aa846		<-- trapping instruction
  31:	48 
  32:	48 8d bb e0 84 03 00 	lea    0x384e0(%rbx),%rdi
  39:	48                   	rex.W
  3a:	b8 00 00 00 00       	mov    $0x0,%eax
	...

Code starting with the faulting instruction
===========================================
   0:	65 48 8b 1d 14 a8 2a 	mov    %gs:0x482aa814(%rip),%rbx        # 0x482aa81c
   7:	48 
   8:	48 8d bb e0 84 03 00 	lea    0x384e0(%rbx),%rdi
   f:	48                   	rex.W
  10:	b8 00 00 00 00       	mov    $0x0,%eax
	...
[   34.719124][    C2] RSP: 0000:ffffc90000b6fc18 EFLAGS: 00000283
[   34.719321][    C2] RAX: 0000000000000001 RBX: 0000000000000002 RCX: ffffffffb7ce71ab
[   34.719632][    C2] RDX: fffffbfff7832b5b RSI: 0000000000000008 RDI: ffffffffbc195ad0
[   34.719863][    C2] RBP: ffff888004471860 R08: 0000000000000000 R09: fffffbfff7832b5a
[   34.720171][    C2] R10: ffffffffbc195ad7 R11: ffff8880046aaaf8 R12: 0000000000000000
[   34.720407][    C2] R13: 0000000000000000 R14: 0000000000000000 R15: ffffffffb828f0cc
[ 34.720635][ C2] ? handle_pte_fault (mm/memory.c:5309) 
[ 34.720794][ C2] ? trace_lock_acquire (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 ./include/linux/cpumask.h:505 ./include/linux/cpumask.h:1120 ./include/trace/events/lock.h:24) 
[ 34.721026][ C2] trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 34.721179][ C2] ? handle_pte_fault (mm/memory.c:5309) 
[ 34.721331][ C2] lock_acquire (kernel/locking/lockdep.c:5727) 
[ 34.721446][ C2] ? handle_pte_fault (mm/memory.c:5309) 
[ 34.721680][ C2] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 34.721831][ C2] ? handle_pte_fault (mm/memory.c:5309) 
[ 34.721982][ C2] handle_pte_fault (mm/memory.c:5309) 
[ 34.722133][ C2] __handle_mm_fault (mm/memory.c:5441) 
[ 34.722364][ C2] ? __pfx___handle_mm_fault (mm/memory.c:5352) 
[ 34.722517][ C2] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 34.722676][ C2] ? lock_vma_under_rcu (mm/memory.c:5787) 
[ 34.722831][ C2] handle_mm_fault (mm/memory.c:5610) 
[ 34.722987][ C2] ? __pfx_handle_mm_fault (mm/memory.c:5576) 
[ 34.723224][ C2] do_user_addr_fault (arch/x86/mm/fault.c:1362) 
[ 34.723378][ C2] ? irqentry_enter_from_user_mode (./include/linux/entry-common.h:117 kernel/entry/common.c:225) 
[ 34.723571][ C2] exc_page_fault (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:67 ./arch/x86/include/asm/irqflags.h:127 arch/x86/mm/fault.c:1513 arch/x86/mm/fault.c:1563) 
[ 34.723725][ C2] asm_exc_page_fault (./arch/x86/include/asm/idtentry.h:623) 
[   34.723964][    C2] RIP: 0033:0x7f9a1b52d4f5
[ 34.724127][ C2] Code: ff ff ff 49 8d 7c 24 10 48 8b 04 fa a8 0f 0f 85 91 01 00 00 48 89 c6 83 e9 01 48 c1 ee 0c 48 33 30 48 89 34 fa 66 42 89 0c 62 <48> c7 40 08 00 00 00 00 48 83 c4 10 5b 5d 41 5c c3 66 2e 0f 1f 84
All code
========
   0:	ff                   	(bad)
   1:	ff                   	(bad)
   2:	ff 49 8d             	decl   -0x73(%rcx)
   5:	7c 24                	jl     0x2b
   7:	10 48 8b             	adc    %cl,-0x75(%rax)
   a:	04 fa                	add    $0xfa,%al
   c:	a8 0f                	test   $0xf,%al
   e:	0f 85 91 01 00 00    	jne    0x1a5
  14:	48 89 c6             	mov    %rax,%rsi
  17:	83 e9 01             	sub    $0x1,%ecx
  1a:	48 c1 ee 0c          	shr    $0xc,%rsi
  1e:	48 33 30             	xor    (%rax),%rsi
  21:	48 89 34 fa          	mov    %rsi,(%rdx,%rdi,8)
  25:	66 42 89 0c 62       	mov    %cx,(%rdx,%r12,2)
  2a:*	48 c7 40 08 00 00 00 	movq   $0x0,0x8(%rax)		<-- trapping instruction
  31:	00 
  32:	48 83 c4 10          	add    $0x10,%rsp
  36:	5b                   	pop    %rbx
  37:	5d                   	pop    %rbp
  38:	41 5c                	pop    %r12
  3a:	c3                   	ret
  3b:	66                   	data16
  3c:	2e                   	cs
  3d:	0f                   	.byte 0xf
  3e:	1f                   	(bad)
  3f:	84                   	.byte 0x84

Code starting with the faulting instruction
===========================================
   0:	48 c7 40 08 00 00 00 	movq   $0x0,0x8(%rax)
   7:	00 
   8:	48 83 c4 10          	add    $0x10,%rsp
   c:	5b                   	pop    %rbx
   d:	5d                   	pop    %rbp
   e:	41 5c                	pop    %r12
  10:	c3                   	ret
  11:	66                   	data16
  12:	2e                   	cs
  13:	0f                   	.byte 0xf
  14:	1f                   	(bad)
  15:	84                   	.byte 0x84
[   34.724755][    C2] RSP: 002b:00007ffd01c48600 EFLAGS: 00010206
[   34.724946][    C2] RAX: 0000557b3bdaab90 RBX: ffffffffffffffb8 RCX: 0000000000000002
[   34.725170][    C2] RDX: 0000557b3bd89010 RSI: 0000557b3bdf5fa0 RDI: 0000000000000011
[   34.725397][    C2] RBP: 0000000000000020 R08: 0000557b3be0add0 R09: 0000557b3be014f1
[   34.725627][    C2] R10: 000000008a018bed R11: 1bb7315e4f1307bd R12: 0000000000000001


Finger prints:
asm_exc_page_fault:dump_stack_lvl:mark_lock_irq:mark_lock