======================================
| [  191.642097][    C2] 1 lock held by swapper/2/0:
| [  191.642221][    C2]  #0: ffffffffb7177c00 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:300 (discriminator 2) kernel/rcu/tree.c:2611 (discriminator 2))
| [  191.642437][    C2]
| [  191.642437][    C2] stack backtrace:
[  191.642588][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  191.642591][    C2] Call Trace:
[  191.642593][    C2]  <IRQ>
[  191.642595][    C2]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[  191.642601][    C2]  print_usage_bug.part.0.cold (kernel/locking/lockdep.c:4042)
[  191.642604][    C2]  ? filter_irq_stacks (kernel/stacktrace.c:402)
[  191.642608][    C2]  mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4056 kernel/locking/lockdep.c:4267)
[  191.642611][    C2]  ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1061 (discriminator 37) arch/x86/kernel/apic/apic.c:1061 (discriminator 37))
[  191.642614][    C2]  ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:697)
[  191.642617][    C2]  ? save_trace (kernel/locking/lockdep.c:589)
[  191.642621][    C2]  mark_lock (kernel/locking/lockdep.c:4753)
[  191.642623][    C2]  mark_usage (kernel/locking/lockdep.c:4642)
[  191.642626][    C2]  __lock_acquire (kernel/locking/lockdep.c:5191)
[  191.642628][    C2]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  191.642630][    C2]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[  191.642636][    C2]  lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[  191.642638][    C2]  ? tcf_mirred_release (./include/linux/spinlock.h:342 net/sched/act_mirred.c:78) act_mirred
[  191.642642][    C2]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  191.642644][    C2]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[  191.642647][    C2]  _raw_spin_lock (./include/linux/spinlock_api_smp.h:158 (discriminator 1) kernel/locking/spinlock.c:158 (discriminator 1))
[  191.642650][    C2]  ? tcf_mirred_release (./include/linux/spinlock.h:342 net/sched/act_mirred.c:78) act_mirred
[  191.642652][    C2] tcf_mirred_release (./include/linux/spinlock.h:342 net/sched/act_mirred.c:78) act_mirred
[  191.642655][    C2]  tcf_action_rcu_free (net/sched/act_api.c:367 net/sched/act_api.c:378)
[  191.642658][    C2]  ? rcu_do_batch (./include/linux/rcupdate.h:310 (discriminator 2) kernel/rcu/tree.c:2619 (discriminator 2))
[  191.642660][    C2]  rcu_do_batch (kernel/rcu/tree.c:2617)
[  191.642664][    C2]  ? trace_rcu_batch_end (./include/trace/events/rcu.h:714 (discriminator 19))
[  191.642667][    C2]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[  191.642670][    C2]  ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[  191.642672][    C2]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[  191.642674][    C2]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[  191.642676][    C2]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:178 (discriminator 6) kernel/locking/spinlock.c:198 (discriminator 6))
[  191.642678][    C2]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:179 (discriminator 1) kernel/locking/spinlock.c:198 (discriminator 1))
[  191.642682][    C2]  rcu_core (kernel/rcu/tree.c:2869)
[  191.642684][    C2]  handle_softirqs (kernel/softirq.c:622)
[  191.642687][    C2]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  191.642690][    C2]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[  191.642692][    C2]  ? _local_bh_enable (kernel/softirq.c:405 (discriminator 1))
[  191.642696][    C2]  __irq_exit_rcu (kernel/softirq.c:656 kernel/softirq.c:496 kernel/softirq.c:735)
[  191.642698][    C2]  irq_exit_rcu (kernel/softirq.c:752)
[  191.642700][    C2]  sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1061 (discriminator 37) arch/x86/kernel/apic/apic.c:1061 (discriminator 37))
[  191.642702][    C2]  </IRQ>
[  191.642703][    C2]  <TASK>
[  191.642704][    C2]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  191.642706][    C2]  asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:697)
[  191.642708][    C2] RIP: 0010:pv_native_safe_halt (./arch/x86/include/asm/irqflags.h:48 arch/x86/kernel/paravirt.c:62)
[  191.642711][    C2] 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
[  191.642714][    C2] RSP: 0018:ffa0000000157de8 EFLAGS: 00000296
[  191.642717][    C2] RAX: 000000000051db55 RBX: ff11000001bb4640 RCX: ffffffffb3ed9667
[  191.642719][    C2] RDX: ff11000001bb4640 RSI: ffffffffb6c01bcb RDI: ffffffffb666f6c0
[  191.642720][    C2] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[  191.642722][    C2] R10: 0000000000000002 R11: 0000000000000001 R12: 1ff400000002afc0
[  191.642723][    C2] R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000
[  191.642725][    C2]  ? cpuidle_idle_call.constprop.0 (kernel/sched/idle.c:199)
[  191.642730][    C2]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[  191.642732][    C2]  default_idle (./arch/x86/include/asm/paravirt.h:62 arch/x86/kernel/process.c:767)
[  191.642735][    C2]  default_idle_call (kernel/sched/idle.c:122)
[  191.642737][    C2]  cpuidle_idle_call.constprop.0 (kernel/sched/idle.c:199)
[  191.642739][    C2]  ? arch_cpu_idle_exit+0x40/0x40
[  191.642742][    C2]  ? mark_tsc_async_resets (arch/x86/kernel/tsc_sync.c:49)
[  191.642745][    C2]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[  191.642747][    C2]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  191.642750][    C2]  do_idle (kernel/sched/idle.c:352)
[  191.642753][    C2]  cpu_startup_entry (kernel/sched/idle.c:451)
[  191.642755][    C2]  start_secondary (arch/x86/kernel/smpboot.c:312)
[  191.642757][    C2]  ? 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