======================================
| [  117.943236][    C1] 1 lock held by swapper/1/0:
| [  117.943697][    C1]  #0: ffffffffb2577c00 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:300 (discriminator 2) kernel/rcu/tree.c:2611 (discriminator 2))
| [  117.943952][    C1] Preemption disabled at:
| [  117.943954][    C1] 0x0
[  117.944208][    C1] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  117.944210][    C1] Call Trace:
[  117.944212][    C1]  <IRQ>
[  117.944214][    C1]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[  117.944221][    C1]  __might_resched.cold (kernel/sched/core.c:9163)
[  117.944224][    C1]  ? default_idle_call (kernel/sched/idle.c:122)
[  117.944229][    C1]  ? perf_trace_sched_switch (./include/linux/list.h:1021 (discriminator 3))
[  117.944233][    C1]  ? start_secondary (arch/x86/kernel/smpboot.c:312)
[  117.944238][    C1]  __mutex_lock (kernel/locking/mutex.c:623 kernel/locking/mutex.c:820)
[  117.944240][    C1]  ? validate_chain (kernel/locking/lockdep.c:3801 (discriminator 2) kernel/locking/lockdep.c:3821 (discriminator 2) kernel/locking/lockdep.c:3876 (discriminator 2))
[  117.944243][    C1]  ? __tcf_chain_put (net/sched/cls_api.c:694)
[  117.944249][    C1]  ? ww_mutex_lock (kernel/locking/mutex.c:933)
[  117.944250][    C1]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  117.944260][    C1]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[  117.944264][    C1]  ? __tcf_chain_put (net/sched/cls_api.c:694)
[  117.944266][    C1]  __tcf_chain_put (net/sched/cls_api.c:694)
[  117.944268][    C1]  ? free_percpu.part.0 (./include/linux/spinlock.h:408 (discriminator 3) mm/percpu.c:2283 (discriminator 3))
[  117.944274][    C1]  tcf_action_rcu_free (net/sched/act_api.c:130 net/sched/act_api.c:370 net/sched/act_api.c:378)
[  117.944276][    C1]  ? rcu_do_batch (./include/linux/rcupdate.h:310 (discriminator 2) kernel/rcu/tree.c:2619 (discriminator 2))
[  117.944279][    C1]  rcu_do_batch (kernel/rcu/tree.c:2617)
[  117.944288][    C1]  ? trace_rcu_batch_end (./include/trace/events/rcu.h:714 (discriminator 19))
[  117.944292][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  117.944294][    C1]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[  117.944297][    C1]  ? trace_irq_disable.constprop.0 (./include/trace/events/preemptirq.h:36 (discriminator 22))
[  117.944299][    C1]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[  117.944301][    C1]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[  117.944304][    C1]  rcu_core (kernel/rcu/tree.c:2869)
[  117.944307][    C1]  handle_softirqs (kernel/softirq.c:622)
[  117.944310][    C1]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  117.944314][    C1]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[  117.944316][    C1]  ? _local_bh_enable (kernel/softirq.c:405 (discriminator 1))
[  117.944321][    C1]  __irq_exit_rcu (kernel/softirq.c:656 kernel/softirq.c:496 kernel/softirq.c:735)
[  117.944322][    C1]  irq_exit_rcu (kernel/softirq.c:752)
[  117.944324][    C1]  sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1061 (discriminator 37) arch/x86/kernel/apic/apic.c:1061 (discriminator 37))
[  117.944326][    C1]  </IRQ>
[  117.944327][    C1]  <TASK>
[  117.944328][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  117.944330][    C1]  asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:697)
[  117.944333][    C1] RIP: 0010:pv_native_safe_halt (./arch/x86/include/asm/irqflags.h:48 arch/x86/kernel/paravirt.c:62)
[  117.944336][    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
[  117.944338][    C1] RSP: 0018:ffa0000000147de8 EFLAGS: 00000296
[  117.944341][    C1] RAX: 00000000002e5f57 RBX: ff11000001bb2340 RCX: ffffffffaf2d9667
[  117.944342][    C1] RDX: ff11000001bb2340 RSI: ffffffffb2001bcb RDI: ffffffffb1a6f6c0
[  117.944343][    C1] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[  117.944344][    C1] R10: 0000000000000001 R11: 0000000000000001 R12: 1ff4000000028fc0
[  117.944344][    C1] R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000
[  117.944348][    C1]  ? cpuidle_idle_call.constprop.0 (kernel/sched/idle.c:199)
[  117.944353][    C1]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[  117.944355][    C1]  default_idle (./arch/x86/include/asm/paravirt.h:62 arch/x86/kernel/process.c:767)
[  117.944357][    C1]  default_idle_call (kernel/sched/idle.c:122)
[  117.944359][    C1]  cpuidle_idle_call.constprop.0 (kernel/sched/idle.c:199)
[  117.944361][    C1]  ? arch_cpu_idle_exit+0x40/0x40
[  117.944363][    C1]  ? mark_tsc_async_resets (arch/x86/kernel/tsc_sync.c:49)
[  117.944365][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  117.944368][    C1]  do_idle (kernel/sched/idle.c:352)
[  117.944371][    C1]  cpu_startup_entry (kernel/sched/idle.c:451)
[  117.944373][    C1]  start_secondary (arch/x86/kernel/smpboot.c:312)
[  117.944375][    C1]  ? set_cpu_sibling_map (./arch/x86/include/asm/smp.h:148 (discriminator 4))
[  117.944379][    C1]  common_startup_64 (arch/x86/kernel/head_64.S:418)
| [  117.954723][    C1] 1 lock held by swapper/1/0:
| [  117.954806][    C1]  #0: ffffffffb2577c00 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:300 (discriminator 2) kernel/rcu/tree.c:2611 (discriminator 2))
| [  117.954955][    C1] stack backtrace:
| [  117.955024][    C1] Tainted: [W]=WARN
[  117.955025][    C1] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  117.955027][    C1] Call Trace:
[  117.955028][    C1]  <IRQ>
[  117.955030][    C1]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[  117.955035][    C1]  __lock_acquire.cold (kernel/locking/lockdep.c:4830 kernel/locking/lockdep.c:4902 kernel/locking/lockdep.c:5187)
[  117.955038][    C1]  ? dump_stack_lvl (lib/dump_stack.c:123 (discriminator 7))
[  117.955040][    C1]  lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[  117.955043][    C1]  ? __tcf_chain_put (net/sched/cls_api.c:694)
[  117.955045][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  117.955047][    C1]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[  117.955049][    C1]  __mutex_lock (kernel/locking/mutex.c:646 kernel/locking/mutex.c:820)
[  117.955051][    C1]  ? __tcf_chain_put (net/sched/cls_api.c:694)
[  117.955053][    C1]  ? __tcf_chain_put (net/sched/cls_api.c:694)
[  117.955055][    C1]  ? ww_mutex_lock (kernel/locking/mutex.c:933)
[  117.955057][    C1]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  117.955059][    C1]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[  117.955061][    C1]  ? __tcf_chain_put (net/sched/cls_api.c:694)
[  117.955063][    C1]  __tcf_chain_put (net/sched/cls_api.c:694)
[  117.955065][    C1]  ? free_percpu.part.0 (./include/linux/spinlock.h:408 (discriminator 3) mm/percpu.c:2283 (discriminator 3))
[  117.955068][    C1]  tcf_action_rcu_free (net/sched/act_api.c:130 net/sched/act_api.c:370 net/sched/act_api.c:378)
[  117.955070][    C1]  ? rcu_do_batch (./include/linux/rcupdate.h:310 (discriminator 2) kernel/rcu/tree.c:2619 (discriminator 2))
[  117.955071][    C1]  rcu_do_batch (kernel/rcu/tree.c:2617)
[  117.955074][    C1]  ? trace_rcu_batch_end (./include/trace/events/rcu.h:714 (discriminator 19))
[  117.955076][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  117.955078][    C1]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[  117.955081][    C1]  ? trace_irq_disable.constprop.0 (./include/trace/events/preemptirq.h:36 (discriminator 22))
[  117.955082][    C1]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[  117.955084][    C1]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[  117.955086][    C1]  rcu_core (kernel/rcu/tree.c:2869)
[  117.955088][    C1]  handle_softirqs (kernel/softirq.c:622)
[  117.955090][    C1]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  117.955093][    C1]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[  117.955095][    C1]  ? _local_bh_enable (kernel/softirq.c:405 (discriminator 1))
[  117.955097][    C1]  __irq_exit_rcu (kernel/softirq.c:656 kernel/softirq.c:496 kernel/softirq.c:735)
[  117.955098][    C1]  irq_exit_rcu (kernel/softirq.c:752)
[  117.955099][    C1]  sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1061 (discriminator 37) arch/x86/kernel/apic/apic.c:1061 (discriminator 37))
[  117.955101][    C1]  </IRQ>
[  117.955102][    C1]  <TASK>
[  117.955103][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  117.955104][    C1]  asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:697)
[  117.955107][    C1] RIP: 0010:pv_native_safe_halt (./arch/x86/include/asm/irqflags.h:48 arch/x86/kernel/paravirt.c:62)
[  117.955109][    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
[  117.955111][    C1] RSP: 0018:ffa0000000147de8 EFLAGS: 00000296
[  117.955113][    C1] RAX: 00000000002e5f57 RBX: ff11000001bb2340 RCX: ffffffffaf2d9667
[  117.955114][    C1] RDX: ff11000001bb2340 RSI: ffffffffb2001bcb RDI: ffffffffb1a6f6c0
[  117.955115][    C1] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[  117.955116][    C1] R10: 0000000000000001 R11: 0000000000000001 R12: 1ff4000000028fc0
[  117.955116][    C1] R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000
[  117.955118][    C1]  ? cpuidle_idle_call.constprop.0 (kernel/sched/idle.c:199)
[  117.955121][    C1]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[  117.955123][    C1]  default_idle (./arch/x86/include/asm/paravirt.h:62 arch/x86/kernel/process.c:767)
[  117.955124][    C1]  default_idle_call (kernel/sched/idle.c:122)
[  117.955126][    C1]  cpuidle_idle_call.constprop.0 (kernel/sched/idle.c:199)
[  117.955128][    C1]  ? arch_cpu_idle_exit+0x40/0x40
[  117.955129][    C1]  ? mark_tsc_async_resets (arch/x86/kernel/tsc_sync.c:49)
[  117.955131][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  117.955133][    C1]  do_idle (kernel/sched/idle.c:352)
[  117.955135][    C1]  cpu_startup_entry (kernel/sched/idle.c:451)
[  117.955136][    C1]  start_secondary (arch/x86/kernel/smpboot.c:312)
[  117.955138][    C1]  ? set_cpu_sibling_map (./arch/x86/include/asm/smp.h:148 (discriminator 4))


Finger prints:
__mutex_lock:__tcf_chain_put:tcf_action_rcu_free:rcu_do_batch:rcu_core