======================================
| [   56.745173][    C3] 1 lock held by swapper/3/0:
| [   56.745261][    C3]  #0: ffffffff9bf77c00 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:300 (discriminator 2) kernel/rcu/tree.c:2611 (discriminator 2))
| [   56.745426][    C3]
| [   56.745426][    C3] stack backtrace:
[   56.745544][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   56.745546][    C3] Call Trace:
[   56.745548][    C3]  <IRQ>
[   56.745549][    C3]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   56.745554][    C3]  print_usage_bug.part.0.cold (kernel/locking/lockdep.c:4042)
[   56.745557][    C3]  ? filter_irq_stacks (kernel/stacktrace.c:402)
[   56.745561][    C3]  mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4056 kernel/locking/lockdep.c:4267)
[   56.745562][    C3]  ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1061 (discriminator 37) arch/x86/kernel/apic/apic.c:1061 (discriminator 37))
[   56.745565][    C3]  ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:697)
[   56.745567][    C3]  ? save_trace (kernel/locking/lockdep.c:589)
[   56.745569][    C3]  mark_lock (kernel/locking/lockdep.c:4753)
[   56.745571][    C3]  mark_usage (kernel/locking/lockdep.c:4642)
[   56.745572][    C3]  __lock_acquire (kernel/locking/lockdep.c:5191)
[   56.745574][    C3]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   56.745576][    C3]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   56.745580][    C3]  lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[   56.745581][    C3]  ? tcf_mirred_release (./include/linux/spinlock.h:342 net/sched/act_mirred.c:78) act_mirred
[   56.745583][    C3]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   56.745585][    C3]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[   56.745587][    C3]  _raw_spin_lock (./include/linux/spinlock_api_smp.h:158 (discriminator 1) kernel/locking/spinlock.c:158 (discriminator 1))
[   56.745589][    C3]  ? tcf_mirred_release (./include/linux/spinlock.h:342 net/sched/act_mirred.c:78) act_mirred
[   56.745590][    C3] tcf_mirred_release (./include/linux/spinlock.h:342 net/sched/act_mirred.c:78) act_mirred
[   56.745592][    C3]  tcf_action_rcu_free (net/sched/act_api.c:367 net/sched/act_api.c:378)
[   56.745594][    C3]  ? rcu_do_batch (./include/linux/rcupdate.h:310 (discriminator 2) kernel/rcu/tree.c:2619 (discriminator 2))
[   56.745596][    C3]  rcu_do_batch (kernel/rcu/tree.c:2617)
[   56.745598][    C3]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   56.745600][    C3]  ? sched_balance_softirq (kernel/sched/fair.c:13350)
[   56.745603][    C3]  ? trace_rcu_batch_end (./include/trace/events/rcu.h:714 (discriminator 19))
[   56.745605][    C3]  ? sched_balance_domains (kernel/sched/fair.c:12634)
[   56.745607][    C3]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   56.745608][    C3]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   56.745610][    C3]  ? trace_irq_disable.constprop.0 (./include/trace/events/preemptirq.h:36 (discriminator 22))
[   56.745612][    C3]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[   56.745613][    C3]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   56.745615][    C3]  rcu_core (kernel/rcu/tree.c:2869)
[   56.745617][    C3]  handle_softirqs (kernel/softirq.c:622)
[   56.745618][    C3]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   56.745621][    C3]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   56.745623][    C3]  ? _local_bh_enable (kernel/softirq.c:405 (discriminator 1))
[   56.745625][    C3]  __irq_exit_rcu (kernel/softirq.c:656 kernel/softirq.c:496 kernel/softirq.c:735)
[   56.745626][    C3]  irq_exit_rcu (kernel/softirq.c:752)
[   56.745628][    C3]  sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1061 (discriminator 37) arch/x86/kernel/apic/apic.c:1061 (discriminator 37))
[   56.745630][    C3]  </IRQ>
[   56.745630][    C3]  <TASK>
[   56.745631][    C3]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   56.745633][    C3]  asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:697)
[   56.745634][    C3] RIP: 0010:pv_native_safe_halt (./arch/x86/include/asm/irqflags.h:48 arch/x86/kernel/paravirt.c:62)
[   56.745637][    C3] Code: 48 8b 3d 44 d3 00 02 e8 1f 00 00 00 48 2b 05 c8 71 a3 00 c3 0f 1f 80 00 00 00 00 f3 0f 1e fa eb 07 0f 00 2d 43 f4 22 00 fb f4 <c3> 0f 1f 40 d6 48 83 ec 20 8b 17 49 89 f8 83 e2 fe 41 89 d2 0f 01
All code
========
   0:	48 8b 3d 44 d3 00 02 	mov    0x200d344(%rip),%rdi        # 0x200d34b
   7:	e8 1f 00 00 00       	call   0x2b
   c:	48 2b 05 c8 71 a3 00 	sub    0xa371c8(%rip),%rax        # 0xa371db
  13:	c3                   	ret
  14:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  1b:	f3 0f 1e fa          	endbr64
  1f:	eb 07                	jmp    0x28
  21:	0f 00 2d 43 f4 22 00 	verw   0x22f443(%rip)        # 0x22f46b
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	c3                   	ret		<-- trapping instruction
  2b:	0f 1f 40 d6          	nopl   -0x2a(%rax)
  2f:	48 83 ec 20          	sub    $0x20,%rsp
  33:	8b 17                	mov    (%rdi),%edx
  35:	49 89 f8             	mov    %rdi,%r8
  38:	83 e2 fe             	and    $0xfffffffe,%edx
  3b:	41 89 d2             	mov    %edx,%r10d
  3e:	0f                   	.byte 0xf
  3f:	01                   	.byte 0x1

Code starting with the faulting instruction
===========================================
   0:	c3                   	ret
   1:	0f 1f 40 d6          	nopl   -0x2a(%rax)
   5:	48 83 ec 20          	sub    $0x20,%rsp
   9:	8b 17                	mov    (%rdi),%edx
   b:	49 89 f8             	mov    %rdi,%r8
   e:	83 e2 fe             	and    $0xfffffffe,%edx
  11:	41 89 d2             	mov    %edx,%r10d
  14:	0f                   	.byte 0xf
  15:	01                   	.byte 0x1
[   56.745639][    C3] RSP: 0018:ffa0000000167de8 EFLAGS: 00000296
[   56.745642][    C3] RAX: 000000000015e41b RBX: ff11000001bd0040 RCX: ffffffff98cd9667
[   56.745643][    C3] RDX: ff11000001bd0040 RSI: ffffffff9ba01bcb RDI: ffffffff9b46f6c0
[   56.745644][    C3] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[   56.745645][    C3] R10: 0000000000000003 R11: 0000000000000001 R12: 1ff400000002cfc0
[   56.745646][    C3] R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000
[   56.745647][    C3]  ? cpuidle_idle_call.constprop.0 (kernel/sched/idle.c:199)
[   56.745650][    C3]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   56.745652][    C3]  default_idle (./arch/x86/include/asm/paravirt.h:62 arch/x86/kernel/process.c:767)
[   56.745654][    C3]  default_idle_call (kernel/sched/idle.c:122)
[   56.745656][    C3]  cpuidle_idle_call.constprop.0 (kernel/sched/idle.c:199)
[   56.745657][    C3]  ? arch_cpu_idle_exit+0x40/0x40
[   56.745659][    C3]  ? mark_tsc_async_resets (arch/x86/kernel/tsc_sync.c:49)
[   56.745661][    C3]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   56.745663][    C3]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   56.745665][    C3]  do_idle (kernel/sched/idle.c:352)
[   56.745667][    C3]  cpu_startup_entry (kernel/sched/idle.c:451)
[   56.745668][    C3]  start_secondary (arch/x86/kernel/smpboot.c:312)
[   56.745670][    C3]  ? set_cpu_sibling_map (./arch/x86/include/asm/smp.h:148 (discriminator 4))


Finger prints:
mark_lock_irq:mark_lock:mark_usage:__lock_acquire:_raw_spin_lock