======================================
| [   18.418015][    C1] 1 lock held by swapper/1/0:
| [   18.418097][    C1]  #0: ffffffffb6777c00 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:300 (discriminator 2) kernel/rcu/tree.c:2611 (discriminator 2))
| [   18.418247][    C1]
| [   18.418247][    C1] stack backtrace:
[   18.418351][    C1] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   18.418353][    C1] Call Trace:
[   18.418354][    C1]  <IRQ>
[   18.418356][    C1]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   18.418360][    C1]  print_usage_bug.part.0.cold (kernel/locking/lockdep.c:4042)
[   18.418363][    C1]  ? filter_irq_stacks (kernel/stacktrace.c:402)
[   18.418366][    C1]  mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4056 kernel/locking/lockdep.c:4267)
[   18.418368][    C1]  ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1061 (discriminator 37) arch/x86/kernel/apic/apic.c:1061 (discriminator 37))
[   18.418370][    C1]  ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:697)
[   18.418372][    C1]  ? save_trace (kernel/locking/lockdep.c:589)
[   18.418374][    C1]  mark_lock (kernel/locking/lockdep.c:4753)
[   18.418376][    C1]  mark_usage (kernel/locking/lockdep.c:4642)
[   18.418377][    C1]  __lock_acquire (kernel/locking/lockdep.c:5191)
[   18.418378][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   18.418380][    C1]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   18.418384][    C1]  lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[   18.418385][    C1]  ? tcf_mirred_release (./include/linux/spinlock.h:342 net/sched/act_mirred.c:78) act_mirred
[   18.418387][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   18.418389][    C1]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[   18.418391][    C1]  _raw_spin_lock (./include/linux/spinlock_api_smp.h:158 (discriminator 1) kernel/locking/spinlock.c:158 (discriminator 1))
[   18.418392][    C1]  ? tcf_mirred_release (./include/linux/spinlock.h:342 net/sched/act_mirred.c:78) act_mirred
[   18.418394][    C1] tcf_mirred_release (./include/linux/spinlock.h:342 net/sched/act_mirred.c:78) act_mirred
[   18.418395][    C1]  tcf_action_rcu_free (net/sched/act_api.c:367 net/sched/act_api.c:378)
[   18.418397][    C1]  ? rcu_do_batch (./include/linux/rcupdate.h:310 (discriminator 2) kernel/rcu/tree.c:2619 (discriminator 2))
[   18.418398][    C1]  rcu_do_batch (kernel/rcu/tree.c:2617)
[   18.418401][    C1]  ? trace_rcu_batch_end (./include/trace/events/rcu.h:714 (discriminator 19))
[   18.418403][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   18.418405][    C1]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   18.418406][    C1]  ? trace_irq_disable.constprop.0 (./include/trace/events/preemptirq.h:36 (discriminator 22))
[   18.418408][    C1]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[   18.418409][    C1]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   18.418411][    C1]  rcu_core (kernel/rcu/tree.c:2869)
[   18.418412][    C1]  handle_softirqs (kernel/softirq.c:622)
[   18.418414][    C1]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   18.418417][    C1]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   18.418418][    C1]  ? _local_bh_enable (kernel/softirq.c:405 (discriminator 1))
[   18.418420][    C1]  __irq_exit_rcu (kernel/softirq.c:656 kernel/softirq.c:496 kernel/softirq.c:735)
[   18.418421][    C1]  irq_exit_rcu (kernel/softirq.c:752)
[   18.418423][    C1]  sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1061 (discriminator 37) arch/x86/kernel/apic/apic.c:1061 (discriminator 37))
[   18.418424][    C1]  </IRQ>
[   18.418425][    C1]  <TASK>
[   18.418426][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   18.418427][    C1]  asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:697)
[   18.418429][    C1] RIP: 0010:pv_native_safe_halt (./arch/x86/include/asm/irqflags.h:48 arch/x86/kernel/paravirt.c:62)
[   18.418431][    C1] 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
[   18.418433][    C1] RSP: 0018:ffa0000000147de8 EFLAGS: 00000296
[   18.418435][    C1] RAX: 00000000000a56f7 RBX: ff11000001bb2340 RCX: ffffffffb34d9667
[   18.418436][    C1] RDX: ff11000001bb2340 RSI: ffffffffb6201bcb RDI: ffffffffb5c6f6c0
[   18.418437][    C1] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[   18.418438][    C1] R10: 0000000000000001 R11: 0000000000000001 R12: 1ff4000000028fc0
[   18.418439][    C1] R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000
[   18.418440][    C1]  ? cpuidle_idle_call.constprop.0 (kernel/sched/idle.c:199)
[   18.418443][    C1]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   18.418445][    C1]  default_idle (./arch/x86/include/asm/paravirt.h:62 arch/x86/kernel/process.c:767)
[   18.418446][    C1]  default_idle_call (kernel/sched/idle.c:122)
[   18.418448][    C1]  cpuidle_idle_call.constprop.0 (kernel/sched/idle.c:199)
[   18.418449][    C1]  ? arch_cpu_idle_exit+0x40/0x40
[   18.418451][    C1]  ? mark_tsc_async_resets (arch/x86/kernel/tsc_sync.c:49)
[   18.418453][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   18.418455][    C1]  do_idle (kernel/sched/idle.c:352)
[   18.418457][    C1]  cpu_startup_entry (kernel/sched/idle.c:451)
[   18.418458][    C1]  start_secondary (arch/x86/kernel/smpboot.c:312)
[   18.418460][    C1]  ? set_cpu_sibling_map (./arch/x86/include/asm/smp.h:148 (discriminator 4))
[   18.418462][    C1]  common_startup_64 (arch/x86/kernel/head_64.S:418)
| [   24.928831][    C0] RCU nest depth: 0, expected: 0
| [   24.928906][    C0] INFO: lockdep is turned off.
| [   24.928978][    C0] Preemption disabled at:
| [   24.928979][    C0] handle_softirqs (kernel/softirq.c:463 (discriminator 1) kernel/softirq.c:598 (discriminator 1))
[   24.929139][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   24.929141][    C0] Call Trace:
[   24.929142][    C0]  <TASK>
[   24.929144][    C0]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   24.929150][    C0]  ? handle_softirqs (kernel/softirq.c:463 (discriminator 1) kernel/softirq.c:598 (discriminator 1))
[   24.929151][    C0]  __might_resched.cold (kernel/sched/core.c:9163)
[   24.929155][    C0]  ? perf_trace_sched_switch (./include/linux/list.h:1021 (discriminator 3))
[   24.929159][    C0]  __mutex_lock (kernel/locking/mutex.c:623 kernel/locking/mutex.c:820)
[   24.929163][    C0]  ? __tcf_chain_put (net/sched/cls_api.c:694)
[   24.929166][    C0]  ? ww_mutex_lock (kernel/locking/mutex.c:933)
[   24.929169][    C0]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   24.929173][    C0]  ? __tcf_chain_put (net/sched/cls_api.c:694)
[   24.929174][    C0]  __tcf_chain_put (net/sched/cls_api.c:694)
[   24.929176][    C0]  ? free_percpu.part.0 (./include/linux/spinlock.h:408 (discriminator 3) mm/percpu.c:2283 (discriminator 3))
[   24.929179][    C0]  tcf_action_rcu_free (net/sched/act_api.c:130 net/sched/act_api.c:370 net/sched/act_api.c:378)
[   24.929181][    C0]  ? rcu_do_batch (./include/linux/rcupdate.h:310 (discriminator 2) kernel/rcu/tree.c:2619 (discriminator 2))
[   24.929183][    C0]  rcu_do_batch (kernel/rcu/tree.c:2617)
[   24.929185][    C0]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   24.929187][    C0]  ? trace_rcu_batch_end (./include/trace/events/rcu.h:714 (discriminator 19))
[   24.929189][    C0]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   24.929192][    C0]  ? 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)
[   24.929200][    C0]  ? trace_hardirqs_on (kernel/trace/trace_preemptirq.c:78)
[   24.929202][    C0]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:179 (discriminator 1) kernel/locking/spinlock.c:198 (discriminator 1))
[   24.929204][    C0]  rcu_core (kernel/rcu/tree.c:2869)
[   24.929206][    C0]  handle_softirqs (kernel/softirq.c:622)
[   24.929208][    C0]  ? _local_bh_enable (kernel/softirq.c:405 (discriminator 1))
[   24.929209][    C0]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   24.929211][    C0]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   24.929212][    C0]  run_ksoftirqd (kernel/softirq.c:1076 kernel/softirq.c:1068)
[   24.929214][    C0]  smpboot_thread_fn (kernel/smpboot.c:160)
[   24.929217][    C0]  ? sort_range (kernel/range.c:164)
[   24.929218][    C0]  kthread (kernel/kthread.c:436)
[   24.929220][    C0]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   24.929222][    C0]  ? kthread_affine_node (kernel/kthread.c:378)
[   24.929224][    C0]  ret_from_fork (arch/x86/kernel/process.c:158)
[   24.929226][    C0]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/syscall_64.c:37)
[   24.929228][    C0]  ? __switch_to (arch/x86/kernel/process_64.c:403 arch/x86/kernel/process_64.c:663)
[   24.929231][    C0]  ? kthread_affine_node (kernel/kthread.c:378)


Finger prints:
handle_softirqs:dump_stack_lvl:__mutex_lock:__tcf_chain_put:tcf_action_rcu_free
mark_lock_irq:mark_lock:mark_usage:__lock_acquire:_raw_spin_lock