======================================
| [  124.707156][    C2] 1 lock held by swapper/2/0:
| [  124.707332][    C2]  #0: ffffffff88377c00 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:300 (discriminator 2) kernel/rcu/tree.c:2611 (discriminator 2))
| [  124.707640][    C2] Preemption disabled at:
| [  124.707643][    C2] 0x0
[  124.707995][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  124.707997][    C2] Call Trace:
[  124.708000][    C2]  <IRQ>
[  124.708002][    C2]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[  124.708009][    C2]  __might_resched.cold (kernel/sched/core.c:9163)
[  124.708013][    C2]  ? default_idle_call (kernel/sched/idle.c:122)
[  124.708022][    C2]  ? perf_trace_sched_switch (./include/linux/list.h:1021 (discriminator 3))
[  124.708026][    C2]  ? start_secondary (arch/x86/kernel/smpboot.c:312)
[  124.708031][    C2]  __mutex_lock (kernel/locking/mutex.c:623 kernel/locking/mutex.c:820)
[  124.708034][    C2]  ? validate_chain (kernel/locking/lockdep.c:3801 (discriminator 2) kernel/locking/lockdep.c:3821 (discriminator 2) kernel/locking/lockdep.c:3876 (discriminator 2))
[  124.708036][    C2]  ? __tcf_chain_put (net/sched/cls_api.c:694)
[  124.708042][    C2]  ? ww_mutex_lock (kernel/locking/mutex.c:933)
[  124.708043][    C2]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  124.708049][    C2]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[  124.708053][    C2]  ? __tcf_chain_put (net/sched/cls_api.c:694)
[  124.708055][    C2]  __tcf_chain_put (net/sched/cls_api.c:694)
[  124.708057][    C2]  ? free_percpu.part.0 (./include/linux/spinlock.h:408 (discriminator 3) mm/percpu.c:2283 (discriminator 3))
[  124.708063][    C2]  tcf_action_rcu_free (net/sched/act_api.c:130 net/sched/act_api.c:370 net/sched/act_api.c:378)
[  124.708065][    C2]  ? rcu_do_batch (./include/linux/rcupdate.h:310 (discriminator 2) kernel/rcu/tree.c:2619 (discriminator 2))
[  124.708067][    C2]  rcu_do_batch (kernel/rcu/tree.c:2617)
[  124.708070][    C2]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[  124.708074][    C2]  ? trace_rcu_batch_end (./include/trace/events/rcu.h:714 (discriminator 19))
[  124.708077][    C2]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[  124.708080][    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)
[  124.708082][    C2]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[  124.708083][    C2]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[  124.708085][    C2]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:178 (discriminator 6) kernel/locking/spinlock.c:198 (discriminator 6))
[  124.708087][    C2]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:179 (discriminator 1) kernel/locking/spinlock.c:198 (discriminator 1))
[  124.708091][    C2]  rcu_core (kernel/rcu/tree.c:2869)
[  124.708094][    C2]  handle_softirqs (kernel/softirq.c:622)
[  124.708097][    C2]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  124.708101][    C2]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[  124.708103][    C2]  ? _local_bh_enable (kernel/softirq.c:405 (discriminator 1))
[  124.708106][    C2]  __irq_exit_rcu (kernel/softirq.c:656 kernel/softirq.c:496 kernel/softirq.c:735)
[  124.708108][    C2]  irq_exit_rcu (kernel/softirq.c:752)
[  124.708110][    C2]  sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1061 (discriminator 37) arch/x86/kernel/apic/apic.c:1061 (discriminator 37))
[  124.708112][    C2]  </IRQ>
[  124.708113][    C2]  <TASK>
[  124.708114][    C2]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  124.708116][    C2]  asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:697)
[  124.708119][    C2] RIP: 0010:pv_native_safe_halt (./arch/x86/include/asm/irqflags.h:48 arch/x86/kernel/paravirt.c:62)
[  124.708121][    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
[  124.708123][    C2] RSP: 0018:ffa0000000157de8 EFLAGS: 00000296
[  124.708126][    C2] RAX: 000000000037709d RBX: ff11000001bb4640 RCX: ffffffff850d9667
[  124.708127][    C2] RDX: ff11000001bb4640 RSI: ffffffff87e01bcb RDI: ffffffff8786f6c0
[  124.708128][    C2] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[  124.708129][    C2] R10: 0000000000000002 R11: 0000000000000001 R12: 1ff400000002afc0
[  124.708130][    C2] R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000
[  124.708133][    C2]  ? cpuidle_idle_call.constprop.0 (kernel/sched/idle.c:199)
[  124.708138][    C2]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[  124.708140][    C2]  default_idle (./arch/x86/include/asm/paravirt.h:62 arch/x86/kernel/process.c:767)
[  124.708142][    C2]  default_idle_call (kernel/sched/idle.c:122)
[  124.708144][    C2]  cpuidle_idle_call.constprop.0 (kernel/sched/idle.c:199)
[  124.708146][    C2]  ? arch_cpu_idle_exit+0x40/0x40
[  124.708148][    C2]  ? mark_tsc_async_resets (arch/x86/kernel/tsc_sync.c:49)
[  124.708151][    C2]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  124.708154][    C2]  do_idle (kernel/sched/idle.c:352)
[  124.708156][    C2]  cpu_startup_entry (kernel/sched/idle.c:451)
[  124.708158][    C2]  start_secondary (arch/x86/kernel/smpboot.c:312)
[  124.708160][    C2]  ? set_cpu_sibling_map (./arch/x86/include/asm/smp.h:148 (discriminator 4))
[  124.708164][    C2]  common_startup_64 (arch/x86/kernel/head_64.S:418)
| [  124.718136][    C2] 1 lock held by swapper/2/0:
| [  124.718216][    C2]  #0: ffffffff88377c00 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:300 (discriminator 2) kernel/rcu/tree.c:2611 (discriminator 2))
| [  124.718369][    C2] stack backtrace:
| [  124.718433][    C2] Tainted: [W]=WARN
[  124.718434][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  124.718435][    C2] Call Trace:
[  124.718436][    C2]  <IRQ>
[  124.718437][    C2]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[  124.718441][    C2]  __lock_acquire.cold (kernel/locking/lockdep.c:4830 kernel/locking/lockdep.c:4902 kernel/locking/lockdep.c:5187)
[  124.718443][    C2]  ? dump_stack_lvl (lib/dump_stack.c:123 (discriminator 7))
[  124.718446][    C2]  lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[  124.718448][    C2]  ? __tcf_chain_put (net/sched/cls_api.c:694)
[  124.718450][    C2]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  124.718452][    C2]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[  124.718453][    C2]  __mutex_lock (kernel/locking/mutex.c:646 kernel/locking/mutex.c:820)
[  124.718455][    C2]  ? __tcf_chain_put (net/sched/cls_api.c:694)
[  124.718457][    C2]  ? __tcf_chain_put (net/sched/cls_api.c:694)
[  124.718459][    C2]  ? ww_mutex_lock (kernel/locking/mutex.c:933)
[  124.718461][    C2]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[  124.718463][    C2]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[  124.718465][    C2]  ? __tcf_chain_put (net/sched/cls_api.c:694)
[  124.718467][    C2]  __tcf_chain_put (net/sched/cls_api.c:694)
[  124.718468][    C2]  ? free_percpu.part.0 (./include/linux/spinlock.h:408 (discriminator 3) mm/percpu.c:2283 (discriminator 3))
[  124.718471][    C2]  tcf_action_rcu_free (net/sched/act_api.c:130 net/sched/act_api.c:370 net/sched/act_api.c:378)
[  124.718472][    C2]  ? rcu_do_batch (./include/linux/rcupdate.h:310 (discriminator 2) kernel/rcu/tree.c:2619 (discriminator 2))
[  124.718474][    C2]  rcu_do_batch (kernel/rcu/tree.c:2617)
[  124.718476][    C2]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[  124.718478][    C2]  ? trace_rcu_batch_end (./include/trace/events/rcu.h:714 (discriminator 19))
[  124.718480][    C2]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[  124.718482][    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)
[  124.718484][    C2]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[  124.718485][    C2]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[  124.718487][    C2]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:178 (discriminator 6) kernel/locking/spinlock.c:198 (discriminator 6))
[  124.718488][    C2]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:179 (discriminator 1) kernel/locking/spinlock.c:198 (discriminator 1))
[  124.718490][    C2]  rcu_core (kernel/rcu/tree.c:2869)
[  124.718492][    C2]  handle_softirqs (kernel/softirq.c:622)
[  124.718494][    C2]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[  124.718496][    C2]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[  124.718498][    C2]  ? _local_bh_enable (kernel/softirq.c:405 (discriminator 1))
[  124.718500][    C2]  __irq_exit_rcu (kernel/softirq.c:656 kernel/softirq.c:496 kernel/softirq.c:735)
[  124.718501][    C2]  irq_exit_rcu (kernel/softirq.c:752)
[  124.718503][    C2]  sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1061 (discriminator 37) arch/x86/kernel/apic/apic.c:1061 (discriminator 37))
[  124.718504][    C2]  </IRQ>
[  124.718505][    C2]  <TASK>
[  124.718506][    C2]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  124.718507][    C2]  asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:697)
[  124.718509][    C2] RIP: 0010:pv_native_safe_halt (./arch/x86/include/asm/irqflags.h:48 arch/x86/kernel/paravirt.c:62)
[  124.718511][    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
[  124.718513][    C2] RSP: 0018:ffa0000000157de8 EFLAGS: 00000296
[  124.718514][    C2] RAX: 000000000037709d RBX: ff11000001bb4640 RCX: ffffffff850d9667
[  124.718515][    C2] RDX: ff11000001bb4640 RSI: ffffffff87e01bcb RDI: ffffffff8786f6c0
[  124.718516][    C2] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[  124.718517][    C2] R10: 0000000000000002 R11: 0000000000000001 R12: 1ff400000002afc0
[  124.718518][    C2] R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000
[  124.718519][    C2]  ? cpuidle_idle_call.constprop.0 (kernel/sched/idle.c:199)
[  124.718522][    C2]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[  124.718523][    C2]  default_idle (./arch/x86/include/asm/paravirt.h:62 arch/x86/kernel/process.c:767)
[  124.718525][    C2]  default_idle_call (kernel/sched/idle.c:122)
[  124.718527][    C2]  cpuidle_idle_call.constprop.0 (kernel/sched/idle.c:199)
[  124.718528][    C2]  ? arch_cpu_idle_exit+0x40/0x40
[  124.718530][    C2]  ? mark_tsc_async_resets (arch/x86/kernel/tsc_sync.c:49)
[  124.718531][    C2]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[  124.718533][    C2]  do_idle (kernel/sched/idle.c:352)
[  124.718535][    C2]  cpu_startup_entry (kernel/sched/idle.c:451)
[  124.718536][    C2]  start_secondary (arch/x86/kernel/smpboot.c:312)
[  124.718537][    C2]  ? 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