======================================
| [   90.490313][    C1] 1 lock held by swapper/1/0:
| [   90.490442][    C1]  #0: ffffffff8f377c00 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:300 (discriminator 2) kernel/rcu/tree.c:2611 (discriminator 2))
| [   90.490724][    C1] Preemption disabled at:
| [   90.490727][    C1] 0x0
[   90.490960][    C1] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   90.490963][    C1] Call Trace:
[   90.490964][    C1]  <IRQ>
[   90.490966][    C1]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   90.490973][    C1]  __might_resched.cold (kernel/sched/core.c:9163)
[   90.490977][    C1]  ? default_idle_call (kernel/sched/idle.c:122)
[   90.490982][    C1]  ? perf_trace_sched_switch (./include/linux/list.h:1021 (discriminator 3))
[   90.490986][    C1]  ? start_secondary (arch/x86/kernel/smpboot.c:312)
[   90.490990][    C1]  __mutex_lock (kernel/locking/mutex.c:623 kernel/locking/mutex.c:820)
[   90.490993][    C1]  ? validate_chain (kernel/locking/lockdep.c:3801 (discriminator 2) kernel/locking/lockdep.c:3821 (discriminator 2) kernel/locking/lockdep.c:3876 (discriminator 2))
[   90.490995][    C1]  ? __tcf_chain_put (net/sched/cls_api.c:694)
[   90.491001][    C1]  ? ww_mutex_lock (kernel/locking/mutex.c:933)
[   90.491002][    C1]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   90.491008][    C1]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   90.491012][    C1]  ? __tcf_chain_put (net/sched/cls_api.c:694)
[   90.491014][    C1]  __tcf_chain_put (net/sched/cls_api.c:694)
[   90.491016][    C1]  ? free_percpu.part.0 (./include/linux/spinlock.h:408 (discriminator 3) mm/percpu.c:2283 (discriminator 3))
[   90.491021][    C1]  tcf_action_rcu_free (net/sched/act_api.c:130 net/sched/act_api.c:370 net/sched/act_api.c:378)
[   90.491024][    C1]  ? rcu_do_batch (./include/linux/rcupdate.h:310 (discriminator 2) kernel/rcu/tree.c:2619 (discriminator 2))
[   90.491025][    C1]  rcu_do_batch (kernel/rcu/tree.c:2617)
[   90.491031][    C1]  ? trace_rcu_batch_end (./include/trace/events/rcu.h:714 (discriminator 19))
[   90.491034][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   90.491036][    C1]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   90.491039][    C1]  ? trace_irq_disable.constprop.0 (./include/trace/events/preemptirq.h:36 (discriminator 22))
[   90.491041][    C1]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[   90.491042][    C1]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   90.491046][    C1]  rcu_core (kernel/rcu/tree.c:2869)
[   90.491048][    C1]  handle_softirqs (kernel/softirq.c:622)
[   90.491052][    C1]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   90.491055][    C1]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   90.491057][    C1]  ? _local_bh_enable (kernel/softirq.c:405 (discriminator 1))
[   90.491061][    C1]  __irq_exit_rcu (kernel/softirq.c:656 kernel/softirq.c:496 kernel/softirq.c:735)
[   90.491063][    C1]  irq_exit_rcu (kernel/softirq.c:752)
[   90.491065][    C1]  sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1061 (discriminator 37) arch/x86/kernel/apic/apic.c:1061 (discriminator 37))
[   90.491067][    C1]  </IRQ>
[   90.491068][    C1]  <TASK>
[   90.491068][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   90.491070][    C1]  asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:697)
[   90.491073][    C1] RIP: 0010:pv_native_safe_halt (./arch/x86/include/asm/irqflags.h:48 arch/x86/kernel/paravirt.c:62)
[   90.491076][    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
[   90.491078][    C1] RSP: 0018:ffa0000000147de8 EFLAGS: 00000296
[   90.491080][    C1] RAX: 0000000000247835 RBX: ff11000001bb2340 RCX: ffffffff8c0d9667
[   90.491082][    C1] RDX: ff11000001bb2340 RSI: ffffffff8ee01bcb RDI: ffffffff8e86f6c0
[   90.491083][    C1] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[   90.491084][    C1] R10: 0000000000000001 R11: 0000000000000001 R12: 1ff4000000028fc0
[   90.491084][    C1] R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000
[   90.491088][    C1]  ? cpuidle_idle_call.constprop.0 (kernel/sched/idle.c:199)
[   90.491092][    C1]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   90.491094][    C1]  default_idle (./arch/x86/include/asm/paravirt.h:62 arch/x86/kernel/process.c:767)
[   90.491096][    C1]  default_idle_call (kernel/sched/idle.c:122)
[   90.491098][    C1]  cpuidle_idle_call.constprop.0 (kernel/sched/idle.c:199)
[   90.491100][    C1]  ? arch_cpu_idle_exit+0x40/0x40
[   90.491102][    C1]  ? mark_tsc_async_resets (arch/x86/kernel/tsc_sync.c:49)
[   90.491104][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   90.491107][    C1]  do_idle (kernel/sched/idle.c:352)
[   90.491110][    C1]  cpu_startup_entry (kernel/sched/idle.c:451)
[   90.491112][    C1]  start_secondary (arch/x86/kernel/smpboot.c:312)
[   90.491114][    C1]  ? set_cpu_sibling_map (./arch/x86/include/asm/smp.h:148 (discriminator 4))
[   90.491118][    C1]  common_startup_64 (arch/x86/kernel/head_64.S:418)
| [   90.497048][    C1] 1 lock held by swapper/1/0:
| [   90.497137][    C1]  #0: ffffffff8f377c00 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:300 (discriminator 2) kernel/rcu/tree.c:2611 (discriminator 2))
| [   90.497278][    C1] stack backtrace:
| [   90.497341][    C1] Tainted: [W]=WARN
[   90.497342][    C1] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   90.497342][    C1] Call Trace:
[   90.497343][    C1]  <IRQ>
[   90.497344][    C1]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   90.497348][    C1]  __lock_acquire.cold (kernel/locking/lockdep.c:4830 kernel/locking/lockdep.c:4902 kernel/locking/lockdep.c:5187)
[   90.497350][    C1]  ? common_startup_64 (arch/x86/kernel/head_64.S:418)
[   90.497352][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   90.497354][    C1]  lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[   90.497355][    C1]  ? __tcf_chain_put (net/sched/cls_api.c:694)
[   90.497358][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   90.497359][    C1]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[   90.497361][    C1]  __mutex_lock (kernel/locking/mutex.c:646 kernel/locking/mutex.c:820)
[   90.497363][    C1]  ? __tcf_chain_put (net/sched/cls_api.c:694)
[   90.497365][    C1]  ? __tcf_chain_put (net/sched/cls_api.c:694)
[   90.497367][    C1]  ? ww_mutex_lock (kernel/locking/mutex.c:933)
[   90.497368][    C1]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   90.497371][    C1]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   90.497376][    C1]  ? __tcf_chain_put (net/sched/cls_api.c:694)
[   90.497377][    C1]  __tcf_chain_put (net/sched/cls_api.c:694)
[   90.497379][    C1]  ? free_percpu.part.0 (./include/linux/spinlock.h:408 (discriminator 3) mm/percpu.c:2283 (discriminator 3))
[   90.497382][    C1]  tcf_action_rcu_free (net/sched/act_api.c:130 net/sched/act_api.c:370 net/sched/act_api.c:378)
[   90.497383][    C1]  ? rcu_do_batch (./include/linux/rcupdate.h:310 (discriminator 2) kernel/rcu/tree.c:2619 (discriminator 2))
[   90.497385][    C1]  rcu_do_batch (kernel/rcu/tree.c:2617)
[   90.497387][    C1]  ? trace_rcu_batch_end (./include/trace/events/rcu.h:714 (discriminator 19))
[   90.497390][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   90.497391][    C1]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   90.497393][    C1]  ? trace_irq_disable.constprop.0 (./include/trace/events/preemptirq.h:36 (discriminator 22))
[   90.497395][    C1]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[   90.497396][    C1]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   90.497399][    C1]  rcu_core (kernel/rcu/tree.c:2869)
[   90.497400][    C1]  handle_softirqs (kernel/softirq.c:622)
[   90.497402][    C1]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   90.497404][    C1]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   90.497406][    C1]  ? _local_bh_enable (kernel/softirq.c:405 (discriminator 1))
[   90.497408][    C1]  __irq_exit_rcu (kernel/softirq.c:656 kernel/softirq.c:496 kernel/softirq.c:735)
[   90.497409][    C1]  irq_exit_rcu (kernel/softirq.c:752)
[   90.497410][    C1]  sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1061 (discriminator 37) arch/x86/kernel/apic/apic.c:1061 (discriminator 37))
[   90.497412][    C1]  </IRQ>
[   90.497413][    C1]  <TASK>
[   90.497413][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   90.497415][    C1]  asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:697)
[   90.497417][    C1] RIP: 0010:pv_native_safe_halt (./arch/x86/include/asm/irqflags.h:48 arch/x86/kernel/paravirt.c:62)
[   90.497419][    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
[   90.497420][    C1] RSP: 0018:ffa0000000147de8 EFLAGS: 00000296
[   90.497421][    C1] RAX: 0000000000247835 RBX: ff11000001bb2340 RCX: ffffffff8c0d9667
[   90.497422][    C1] RDX: ff11000001bb2340 RSI: ffffffff8ee01bcb RDI: ffffffff8e86f6c0
[   90.497423][    C1] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[   90.497424][    C1] R10: 0000000000000001 R11: 0000000000000001 R12: 1ff4000000028fc0
[   90.497425][    C1] R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000
[   90.497426][    C1]  ? cpuidle_idle_call.constprop.0 (kernel/sched/idle.c:199)
[   90.497428][    C1]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   90.497430][    C1]  default_idle (./arch/x86/include/asm/paravirt.h:62 arch/x86/kernel/process.c:767)
[   90.497432][    C1]  default_idle_call (kernel/sched/idle.c:122)
[   90.497433][    C1]  cpuidle_idle_call.constprop.0 (kernel/sched/idle.c:199)
[   90.497435][    C1]  ? arch_cpu_idle_exit+0x40/0x40
[   90.497436][    C1]  ? mark_tsc_async_resets (arch/x86/kernel/tsc_sync.c:49)
[   90.497438][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   90.497440][    C1]  do_idle (kernel/sched/idle.c:352)
[   90.497442][    C1]  cpu_startup_entry (kernel/sched/idle.c:451)
[   90.497443][    C1]  start_secondary (arch/x86/kernel/smpboot.c:312)
[   90.497445][    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