======================================
| [ 560.500662][ C2] ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
| [  560.500664][    C2]
| [  560.500665][    C2]
| [  560.500665][    C2] stack backtrace:
[  560.500672][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  560.500675][    C2] Workqueue: pm pm_runtime_work
[  560.500682][    C2] Call Trace:
[  560.500685][    C2]  <IRQ>
[ 560.500689][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 560.500695][ C2] print_irq_inversion_bug.part.0 (kernel/locking/lockdep.c:4127) 
[ 560.500699][ C2] mark_lock_irq (kernel/locking/lockdep.c:4295) 
[ 560.500706][ C2] mark_lock (kernel/locking/lockdep.c:4753) 
[ 560.500709][ C2] mark_usage (kernel/locking/lockdep.c:4639) 
[ 560.500712][ C2] __lock_acquire (kernel/locking/lockdep.c:5191) 
[ 560.500716][ C2] lock_acquire.part.0 (kernel/locking/lockdep.c:470 kernel/locking/lockdep.c:5870) 
[ 560.500719][ C2] ? console_lock_spinning_enable (kernel/printk/printk.c:1924) 
[ 560.500723][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751) 
[ 560.500729][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5831) 
[ 560.500732][ C2] ? console_lock_spinning_enable (kernel/printk/printk.c:1924) 
[ 560.500736][ C2] console_lock_spinning_enable (kernel/printk/printk.c:1925) 
[ 560.500739][ C2] ? console_lock_spinning_enable (kernel/printk/printk.c:1924) 
[ 560.500742][ C2] console_emit_next_record (kernel/printk/printk.c:3050 (discriminator 3) kernel/printk/printk.c:3137 (discriminator 3)) 
[ 560.500746][ C2] ? devkmsg_read (kernel/printk/printk.c:3082) 
[ 560.500750][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751) 
[ 560.500756][ C2] console_flush_all (kernel/printk/printk.c:3227) 
[ 560.500760][ C2] ? console_emit_next_record (kernel/printk/printk.c:3188) 
[ 560.500763][ C2] ? __lock_acquire (kernel/locking/lockdep.c:5237) 
[ 560.500768][ C2] console_unlock (kernel/printk/printk.c:3286 kernel/printk/printk.c:3325) 
[ 560.500771][ C2] ? console_flush_all (kernel/printk/printk.c:3320) 
[ 560.500774][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751) 
[ 560.500778][ C2] ? irq_work_single (kernel/irq_work.c:222) 
[ 560.500781][ C2] ? irq_work_single (kernel/irq_work.c:222) 
[ 560.500786][ C2] wake_up_klogd_work_func (kernel/printk/printk.c:4529) 
[ 560.500789][ C2] irq_work_single (kernel/irq_work.c:222) 
[ 560.500793][ C2] irq_work_run_list (kernel/irq_work.c:251 (discriminator 3)) 
[ 560.500796][ C2] ? irq_work_tick (kernel/irq_work.c:277) 
[ 560.500799][ C2] update_process_times (kernel/time/timer.c:2478) 
[ 560.500803][ C2] tick_nohz_handler (kernel/time/tick-sched.c:277 kernel/time/tick-sched.c:297) 
[ 560.500806][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751) 
[ 560.500810][ C2] __run_hrtimer (kernel/time/hrtimer.c:1761) 
[ 560.500814][ C2] ? tick_do_update_jiffies64.part.0 (kernel/time/tick-sched.c:285) 
[ 560.500818][ C2] __hrtimer_run_queues (./include/linux/timerqueue.h:25 kernel/time/hrtimer.c:1805) 
[ 560.500822][ C2] ? hrtimer_interrupt (kernel/time/hrtimer.c:640 (discriminator 2) kernel/time/hrtimer.c:1869 (discriminator 2)) 
[ 560.500826][ C2] ? __run_hrtimer (kernel/time/hrtimer.c:1795) 
[ 560.500829][ C2] ? kvm_clock_get_cycles (./arch/x86/include/asm/preempt.h:95 arch/x86/kernel/kvmclock.c:80 arch/x86/kernel/kvmclock.c:86) 
[ 560.500837][ C2] hrtimer_interrupt (kernel/time/hrtimer.c:1890) 
[ 560.500841][ C2] ? __common_interrupt (./include/asm-generic/irq_regs.h:28 arch/x86/kernel/irq.c:295) 
[ 560.500849][ C2] __sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1057) 
[ 560.500852][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[  560.500856][    C2]  </IRQ>
[  560.500857][    C2]  <TASK>
[ 560.500859][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 560.500861][ C2] RIP: 0010:_raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:160 kernel/locking/spinlock.c:202) 
[ 560.500865][ C2] Code: 0f 1f 44 00 00 55 48 8b 74 24 08 48 89 fd 48 83 c7 18 e8 85 da f9 fd 48 89 ef e8 ad 29 fa fd e8 58 df 1d fe fb bf 01 00 00 00 <e8> fd 5d ee fd 65 8b 05 76 7c 03 02 85 c0 74 02 5d c3 e8 bb 76 aa
All code
========
   0:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
   5:	55                   	push   %rbp
   6:	48 8b 74 24 08       	mov    0x8(%rsp),%rsi
   b:	48 89 fd             	mov    %rdi,%rbp
   e:	48 83 c7 18          	add    $0x18,%rdi
  12:	e8 85 da f9 fd       	call   0xfffffffffdf9da9c
  17:	48 89 ef             	mov    %rbp,%rdi
  1a:	e8 ad 29 fa fd       	call   0xfffffffffdfa29cc
  1f:	e8 58 df 1d fe       	call   0xfffffffffe1ddf7c
  24:	fb                   	sti
  25:	bf 01 00 00 00       	mov    $0x1,%edi
  2a:*	e8 fd 5d ee fd       	call   0xfffffffffdee5e2c		<-- trapping instruction
  2f:	65 8b 05 76 7c 03 02 	mov    %gs:0x2037c76(%rip),%eax        # 0x2037cac
  36:	85 c0                	test   %eax,%eax
  38:	74 02                	je     0x3c
  3a:	5d                   	pop    %rbp
  3b:	c3                   	ret
  3c:	e8                   	.byte 0xe8
  3d:	bb                   	.byte 0xbb
  3e:	76 aa                	jbe    0xffffffffffffffea

Code starting with the faulting instruction
===========================================
   0:	e8 fd 5d ee fd       	call   0xfffffffffdee5e02
   5:	65 8b 05 76 7c 03 02 	mov    %gs:0x2037c76(%rip),%eax        # 0x2037c82
   c:	85 c0                	test   %eax,%eax
   e:	74 02                	je     0x12
  10:	5d                   	pop    %rbp
  11:	c3                   	ret
  12:	e8                   	.byte 0xe8
  13:	bb                   	.byte 0xbb
  14:	76 aa                	jbe    0xffffffffffffffc0
[  560.500868][    C2] RSP: 0018:ffffc900001ffc88 EFLAGS: 00000202
[  560.500871][    C2] RAX: 0000000000008443 RBX: ffffffff8f01d264 RCX: ffffffff8bbcd1ff
[  560.500873][    C2] RDX: 0000000000000000 RSI: ffffffff8e1ea6cb RDI: 0000000000000001
[  560.500875][    C2] RBP: ffff888036335880 R08: 0000000000000001 R09: 0000000000000001
[  560.500877][    C2] R10: ffffffff8f01c217 R11: ffffffff9096b760 R12: ffff8880058e0a58
[  560.500879][    C2] R13: ffff888001c60040 R14: ffff888001965540 R15: 0000000000000000
[ 560.500882][ C2] ? trace_irq_enable.constprop.0 (./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:646 ./include/linux/cpumask.h:1205 ./include/trace/events/preemptirq.h:40) 
[ 560.500890][ C2] ? _raw_spin_unlock_irq (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 ./include/linux/spinlock_api_smp.h:159 kernel/locking/spinlock.c:202) 
[ 560.500893][ C2] process_one_work (kernel/workqueue.c:3207) 
[ 560.500899][ C2] ? pwq_dec_nr_in_flight (kernel/workqueue.c:3138) 
[ 560.500905][ C2] ? assign_work (kernel/workqueue.c:1204) 
[ 560.500909][ C2] worker_thread (kernel/workqueue.c:3313 kernel/workqueue.c:3400) 
[ 560.500915][ C2] ? rescuer_thread (kernel/workqueue.c:3346) 
[ 560.500918][ C2] kthread (kernel/kthread.c:463) 
[ 560.500922][ C2] ? kthread_is_per_cpu (kernel/kthread.c:412) 
[ 560.500925][ C2] ? ret_from_fork (arch/x86/kernel/process.c:147) 
[ 560.500927][ C2] ? __lock_release (kernel/locking/lockdep.c:5536) 
[ 560.500930][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751) 
[ 560.500934][ C2] ? kthread_is_per_cpu (kernel/kthread.c:412) 
[ 560.500938][ C2] ret_from_fork (arch/x86/kernel/process.c:154) 
[ 560.500940][ C2] ? kthread_is_per_cpu (kernel/kthread.c:412) 


Finger prints:
ret_from_fork_asm:dump_stack_lvl:mark_lock_irq:mark_lock:mark_usage