======================================
| [ 293.912776][ C1] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
| [  293.913035][    C1]
| [  293.913108][    C1]
| [  293.913108][    C1] stack backtrace:
[  293.913513][    C1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  293.913996][    C1] Call Trace:
[  293.914115][    C1]  <IRQ>
[ 293.914192][ C1] dump_stack_lvl (lib/dump_stack.c:117) 
[ 293.914352][ C1] print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 293.914625][ C1] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 293.914778][ C1] ? __pfx_print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4024) 
[ 293.914961][ C1] ? __pfx_usage_skip (kernel/locking/lockdep.c:2264) 
[ 293.915107][ C1] ? __pfx_usage_match (kernel/locking/lockdep.c:2256) 
[ 293.915253][ C1] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 293.915406][ C1] mark_lock_irq (kernel/locking/lockdep.c:4244) 
[ 293.915553][ C1] ? __pfx_mark_lock_irq (kernel/locking/lockdep.c:4207) 
[ 293.915700][ C1] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 293.915932][ C1] ? save_trace (kernel/locking/lockdep.c:586) 
[ 293.916083][ C1] mark_lock (kernel/locking/lockdep.c:4678) 
[ 293.916195][ C1] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 293.916341][ C1] mark_usage (kernel/locking/lockdep.c:4567) 
[ 293.916454][ C1] __lock_acquire (kernel/locking/lockdep.c:5091) 
[ 293.916681][ C1] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) 
[ 293.916830][ C1] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 293.916975][ C1] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 293.917123][ C1] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 293.917355][ C1] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 293.917506][ C1] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 293.917652][ C1] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 293.917802][ C1] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 293.918029][ C1] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 293.918175][ C1] _raw_write_lock (./include/linux/rwlock_api_smp.h:210 kernel/locking/spinlock.c:300) 
[ 293.918321][ C1] ? addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 293.918468][ C1] addrconf_rs_timer (net/ipv6/addrconf.c:4023) 
[ 293.918614][ C1] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 293.918846][ C1] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 293.918992][ C1] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 293.919138][ C1] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 293.919284][ C1] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 293.919510][ C1] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 293.919659][ C1] call_timer_fn (kernel/time/timer.c:1793) 
[ 293.919808][ C1] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 293.919954][ C1] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1783) 
[ 293.920185][ C1] ? __pfx_call_timer_fn (kernel/time/timer.c:1770) 
[ 293.920332][ C1] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) 
[ 293.920446][ C1] __run_timers (kernel/time/timer.c:1845 kernel/time/timer.c:2418) 
[ 293.920597][ C1] ? __pfx_addrconf_rs_timer (net/ipv6/addrconf.c:4016) 
[ 293.920745][ C1] ? __pfx___run_timers (kernel/time/timer.c:2389) 
[ 293.920974][ 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) 
[ 293.921120][ C1] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 293.921267][ C1] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 293.921417][ C1] ? run_timer_softirq (kernel/time/timer.c:2429 kernel/time/timer.c:2422 kernel/time/timer.c:2438 kernel/time/timer.c:2448) 
[ 293.921650][ C1] run_timer_softirq (kernel/time/timer.c:2430 kernel/time/timer.c:2422 kernel/time/timer.c:2438 kernel/time/timer.c:2448) 
[ 293.921796][ C1] __do_softirq (kernel/softirq.c:554) 
[ 293.921945][ C1] irq_exit_rcu (kernel/softirq.c:428 kernel/softirq.c:633 kernel/softirq.c:645) 
[ 293.922055][ C1] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1043 arch/x86/kernel/apic/apic.c:1043) 
[  293.922203][    C1]  </IRQ>
[  293.922279][    C1]  <TASK>
[ 293.922354][ C1] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 293.922535][ C1] RIP: 0010:_raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 293.922731][ C1] Code: 10 e8 81 21 79 fd 48 89 ef e8 b9 91 79 fd 81 e3 00 02 00 00 75 1d 9c 58 f6 c4 02 75 29 48 85 db 74 01 fb 65 ff 0d f5 7b 8d 70 <74> 0e 5b 5d c3 cc cc cc cc e8 0f f0 9c fd eb dc 0f 1f 44 00 00 5b
All code
========
   0:	10 e8                	adc    %ch,%al
   2:	81 21 79 fd 48 89    	andl   $0x8948fd79,(%rcx)
   8:	ef                   	out    %eax,(%dx)
   9:	e8 b9 91 79 fd       	call   0xfffffffffd7991c7
   e:	81 e3 00 02 00 00    	and    $0x200,%ebx
  14:	75 1d                	jne    0x33
  16:	9c                   	pushf
  17:	58                   	pop    %rax
  18:	f6 c4 02             	test   $0x2,%ah
  1b:	75 29                	jne    0x46
  1d:	48 85 db             	test   %rbx,%rbx
  20:	74 01                	je     0x23
  22:	fb                   	sti
  23:	65 ff 0d f5 7b 8d 70 	decl   %gs:0x708d7bf5(%rip)        # 0x708d7c1f
  2a:*	74 0e                	je     0x3a		<-- trapping instruction
  2c:	5b                   	pop    %rbx
  2d:	5d                   	pop    %rbp
  2e:	c3                   	ret
  2f:	cc                   	int3
  30:	cc                   	int3
  31:	cc                   	int3
  32:	cc                   	int3
  33:	e8 0f f0 9c fd       	call   0xfffffffffd9cf047
  38:	eb dc                	jmp    0x16
  3a:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  3f:	5b                   	pop    %rbx

Code starting with the faulting instruction
===========================================
   0:	74 0e                	je     0x10
   2:	5b                   	pop    %rbx
   3:	5d                   	pop    %rbp
   4:	c3                   	ret
   5:	cc                   	int3
   6:	cc                   	int3
   7:	cc                   	int3
   8:	cc                   	int3
   9:	e8 0f f0 9c fd       	call   0xfffffffffd9cf01d
   e:	eb dc                	jmp    0xffffffffffffffec
  10:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  15:	5b                   	pop    %rbx
[  293.923337][    C1] RSP: 0018:ffffc900008afc90 EFLAGS: 00000282
[  293.923527][    C1] RAX: 0000000000000002 RBX: 0000000000000200 RCX: 1ffffffff22722d9
[  293.923837][    C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8f764de1
[  293.924060][    C1] RBP: ffff88800196e180 R08: 0000000000000001 R09: fffffbfff2272b5a
[  293.924359][    C1] R10: ffffffff91395ad7 R11: 0000000000000040 R12: ffff88800196e180
[  293.924580][    C1] R13: ffffea0000111800 R14: ffff88800196b3c0 R15: ffff8880044657c0
[ 293.924802][ C1] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 293.925143][ C1] get_partial_node.part.0 (mm/slub.c:2623) 
[ 293.925300][ C1] ___slab_alloc (mm/slub.c:2583 mm/slub.c:2701 mm/slub.c:3505) 
[ 293.925463][ C1] ? kmem_cache_alloc (./include/linux/sched/mm.h:315 mm/slub.c:3746 mm/slub.c:3827 mm/slub.c:3852) 
[ 293.925610][ C1] ? getname_flags (fs/namei.c:139) 
[ 293.925758][ C1] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 293.925994][ C1] ? getname_flags (fs/namei.c:139) 
[ 293.926141][ C1] ? kmem_cache_alloc (mm/slub.c:3610 mm/slub.c:3663 mm/slub.c:3835 mm/slub.c:3852) 
[ 293.926288][ C1] kmem_cache_alloc (mm/slub.c:3610 mm/slub.c:3663 mm/slub.c:3835 mm/slub.c:3852) 
[ 293.926435][ C1] getname_flags (fs/namei.c:139) 
[ 293.926663][ C1] user_path_at_empty (fs/namei.c:2921) 
[ 293.926815][ C1] __x64_sys_umount (fs/namespace.c:1917 fs/namespace.c:1924 fs/namespace.c:1922 fs/namespace.c:1922) 
[ 293.926966][ C1] ? __pfx___x64_sys_umount (fs/namespace.c:1922) 
[ 293.927115][ C1] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 293.927344][ C1] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[  293.927526][    C1] RIP: 0033:0x7f185c88463b
[ 293.927676][ C1] Code: 0f 1e fa 48 89 fe 31 ff e9 72 08 00 00 66 90 f3 0f 1e fa 31 f6 e9 05 00 00 00 0f 1f 44 00 00 f3 0f 1e fa b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 05 c3 0f 1f 40 00 48 8b 15 91 a7 0a 00 f7 d8
All code
========
   0:	0f 1e fa             	nop    %edx
   3:	48 89 fe             	mov    %rdi,%rsi
   6:	31 ff                	xor    %edi,%edi
   8:	e9 72 08 00 00       	jmp    0x87f
   d:	66 90                	xchg   %ax,%ax
   f:	f3 0f 1e fa          	endbr64
  13:	31 f6                	xor    %esi,%esi
  15:	e9 05 00 00 00       	jmp    0x1f
  1a:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  1f:	f3 0f 1e fa          	endbr64
  23:	b8 a6 00 00 00       	mov    $0xa6,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 05                	ja     0x37
  32:	c3                   	ret
  33:	0f 1f 40 00          	nopl   0x0(%rax)
  37:	48 8b 15 91 a7 0a 00 	mov    0xaa791(%rip),%rdx        # 0xaa7cf
  3e:	f7 d8                	neg    %eax

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 05                	ja     0xd
   8:	c3                   	ret
   9:	0f 1f 40 00          	nopl   0x0(%rax)
   d:	48 8b 15 91 a7 0a 00 	mov    0xaa791(%rip),%rdx        # 0xaa7a5
  14:	f7 d8                	neg    %eax
[  293.928285][    C1] RSP: 002b:00007ffe89525168 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6
[  293.928508][    C1] RAX: ffffffffffffffda RBX: 000000000048454c RCX: 00007f185c88463b
[  293.928811][    C1] RDX: 000000000047243b RSI: 0000000000000002 RDI: 00000000004840d3
[  293.929033][    C1] RBP: 00000000004840d3 R08: 0000000000000000 R09: 00007ffe89525000
[  293.929250][    C1] R10: 00007f185c74a8d0 R11: 0000000000000202 R12: 000000000047243b


Finger prints:
dump_stack_lvl:mark_lock_irq:mark_lock:mark_usage