======================================
| [ 36.172151][ C1] common_startup_64 (arch/x86/kernel/head_64.S:421) 
| [   36.172288][    C1]
| [   36.172356][    C1]
| [   36.172356][    C1] stack backtrace:
[   36.172803][    C1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   36.173105][    C1] Call Trace:
[   36.173296][    C1]  <IRQ>
[ 36.173371][ C1] dump_stack_lvl (lib/dump_stack.c:117) 
[ 36.173515][ C1] print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 36.173682][ C1] ? common_startup_64 (arch/x86/kernel/head_64.S:421) 
[ 36.173898][ C1] ? __pfx_print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 36.174067][ C1] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) 
[ 36.174201][ C1] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) 
[ 36.174335][ C1] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 36.174555][ C1] mark_lock_irq (kernel/locking/lockdep.c:4244) 
[ 36.174696][ C1] ? __pfx_mark_lock_irq (kernel/locking/lockdep.c:4207) 
[ 36.174830][ C1] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 36.174968][ C1] ? __lock_acquire (kernel/locking/lockdep.c:5137) 
[ 36.175104][ C1] ? save_trace (kernel/locking/lockdep.c:586) 
[ 36.175399][ C1] mark_lock (kernel/locking/lockdep.c:4678) 
[ 36.175502][ C1] mark_usage (kernel/locking/lockdep.c:4567) 
[ 36.175604][ C1] __lock_acquire (kernel/locking/lockdep.c:5091) 
[ 36.175742][ C1] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 36.175962][ C1] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934) 
[ 36.176104][ C1] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 36.176238][ C1] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 36.176374][ C1] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934) 
[ 36.176508][ C1] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 36.176722][ C1] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934) 
[ 36.176858][ C1] _raw_read_lock_bh (./include/linux/rwlock_api_smp.h:177 kernel/locking/spinlock.c:252) 
[ 36.176994][ C1] ? ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934) 
[ 36.177128][ C1] ipv6_get_lladdr (net/ipv6/addrconf.c:1911 net/ipv6/addrconf.c:1934) 
[ 36.177262][ C1] ? 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) 
[ 36.177401][ C1] ndisc_send_ns (net/ipv6/ndisc.c:658) 
[ 36.177535][ C1] ? __pfx_ndisc_send_ns (net/ipv6/ndisc.c:653) 
[ 36.177670][ C1] ? trace_rcu_dyntick (./include/trace/events/rcu.h:480 (discriminator 52)) 
[ 36.177889][ C1] ? ct_nmi_exit (./include/linux/context_tracking_state.h:92 kernel/context_tracking.c:224) 
[ 36.178025][ C1] ndisc_solicit (net/ipv6/ndisc.c:754 (discriminator 2)) 
[ 36.178162][ C1] ? __pfx_ndisc_solicit (net/ipv6/ndisc.c:736) 
[ 36.178298][ C1] ? do_raw_write_unlock (kernel/locking/spinlock_debug.c:205 kernel/locking/spinlock_debug.c:232) 
[ 36.178519][ C1] neigh_probe (net/core/neighbour.c:1075) 
[ 36.178629][ C1] neigh_timer_handler (net/core/neighbour.c:1163) 
[ 36.178765][ C1] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 36.178903][ C1] ? __pfx_neigh_timer_handler (net/core/neighbour.c:1083) 
[ 36.179036][ C1] call_timer_fn (kernel/time/timer.c:1793) 
[ 36.179251][ C1] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 36.179384][ C1] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 36.179518][ C1] ? __pfx_call_timer_fn (kernel/time/timer.c:1770) 
[ 36.179650][ C1] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) 
[ 36.179841][ C1] __run_timers (kernel/time/timer.c:1845 kernel/time/timer.c:2418) 
[ 36.179976][ C1] ? __pfx_neigh_timer_handler (net/core/neighbour.c:1083) 
[ 36.180112][ C1] ? __pfx___run_timers (kernel/time/timer.c:2389) 
[ 36.180246][ C1] ? 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) 
[ 36.180380][ C1] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 36.180593][ C1] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 36.180728][ C1] ? run_timer_softirq (kernel/time/timer.c:2429 kernel/time/timer.c:2422 kernel/time/timer.c:2438 kernel/time/timer.c:2448) 
[ 36.180862][ C1] run_timer_softirq (kernel/time/timer.c:2430 kernel/time/timer.c:2422 kernel/time/timer.c:2438 kernel/time/timer.c:2448) 
[ 36.180997][ C1] __do_softirq (kernel/softirq.c:554) 
[ 36.181226][ C1] irq_exit_rcu (kernel/softirq.c:428 kernel/softirq.c:633 kernel/softirq.c:645) 
[ 36.181331][ C1] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1043 arch/x86/kernel/apic/apic.c:1043) 
[   36.181468][    C1]  </IRQ>
[   36.181539][    C1]  <TASK>
[ 36.181608][ C1] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 36.181857][ C1] RIP: 0010:default_idle (./arch/x86/include/asm/irqflags.h:37 ./arch/x86/include/asm/irqflags.h:72 arch/x86/kernel/process.c:743) 
[ 36.182000][ C1] Code: 4c 01 c7 4c 29 c2 e9 72 ff ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d d3 fb 32 00 fb f4 <fa> c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90
All code
========
   0:	4c 01 c7             	add    %r8,%rdi
   3:	4c 29 c2             	sub    %r8,%rdx
   6:	e9 72 ff ff ff       	jmp    0xffffffffffffff7d
   b:	90                   	nop
   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:	90                   	nop
  18:	90                   	nop
  19:	90                   	nop
  1a:	90                   	nop
  1b:	f3 0f 1e fa          	endbr64
  1f:	66 90                	xchg   %ax,%ax
  21:	0f 00 2d d3 fb 32 00 	verw   0x32fbd3(%rip)        # 0x32fbfb
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	fa                   	cli		<-- trapping instruction
  2b:	c3                   	ret
  2c:	cc                   	int3
  2d:	cc                   	int3
  2e:	cc                   	int3
  2f:	cc                   	int3
  30:	66 66 2e 0f 1f 84 00 	data16 cs nopw 0x0(%rax,%rax,1)
  37:	00 00 00 00 
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	90                   	nop
  3f:	90                   	nop

Code starting with the faulting instruction
===========================================
   0:	fa                   	cli
   1:	c3                   	ret
   2:	cc                   	int3
   3:	cc                   	int3
   4:	cc                   	int3
   5:	cc                   	int3
   6:	66 66 2e 0f 1f 84 00 	data16 cs nopw 0x0(%rax,%rax,1)
   d:	00 00 00 00 
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
[   36.182569][    C1] RSP: 0018:ffffc9000014fdf8 EFLAGS: 00000242
[   36.182746][    C1] RAX: 000000000007b531 RBX: 1ffff92000029fc1 RCX: ffffffff9cf31ea5
[   36.182954][    C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff9a6ac1d4
[   36.183239][    C1] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c1709c
[   36.183445][    C1] R10: ffff8880360b84e3 R11: ffff8880360bde40 R12: 0000000000000000
[   36.183649][    C1] R13: ffff888001b8a300 R14: dffffc0000000000 R15: 0000000000000000
[ 36.183935][ C1] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:147) 
[ 36.184071][ C1] ? cpuidle_idle_call (kernel/sched/idle.c:192) 
[ 36.184207][ C1] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 36.184341][ C1] cpuidle_idle_call (kernel/sched/idle.c:192) 
[ 36.184556][ C1] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 36.184698][ C1] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 36.184837][ C1] do_idle (kernel/sched/idle.c:332) 
[ 36.184940][ C1] cpu_startup_entry (kernel/sched/idle.c:429 (discriminator 1)) 
[ 36.185154][ C1] start_secondary (arch/x86/kernel/smpboot.c:201 arch/x86/kernel/smpboot.c:281) 
[ 36.185290][ C1] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:231) 


Finger prints:
common_startup_64:dump_stack_lvl:mark_lock_irq:mark_lock