======================================
| [   39.746861][    C3] 1 lock held by swapper/3/0:
| [   39.747066][    C3]  #0: ffffffffad777c00 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:300 (discriminator 2) kernel/rcu/tree.c:2611 (discriminator 2))
| [   39.747407][    C3] Preemption disabled at:
| [   39.747408][    C3] 0x0
[   39.747742][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   39.747744][    C3] Call Trace:
[   39.747746][    C3]  <IRQ>
[   39.747747][    C3]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   39.747754][    C3]  __might_resched.cold (kernel/sched/core.c:9163)
[   39.747757][    C3]  ? default_idle_call (kernel/sched/idle.c:122)
[   39.747762][    C3]  ? perf_trace_sched_switch (./include/linux/list.h:1021 (discriminator 3))
[   39.747765][    C3]  ? start_secondary (arch/x86/kernel/smpboot.c:312)
[   39.747770][    C3]  __mutex_lock (kernel/locking/mutex.c:623 kernel/locking/mutex.c:820)
[   39.747773][    C3]  ? validate_chain (kernel/locking/lockdep.c:3801 (discriminator 2) kernel/locking/lockdep.c:3821 (discriminator 2) kernel/locking/lockdep.c:3876 (discriminator 2))
[   39.747775][    C3]  ? __tcf_chain_put (net/sched/cls_api.c:694)
[   39.747781][    C3]  ? ww_mutex_lock (kernel/locking/mutex.c:933)
[   39.747782][    C3]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   39.747788][    C3]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   39.747792][    C3]  ? __tcf_chain_put (net/sched/cls_api.c:694)
[   39.747794][    C3]  __tcf_chain_put (net/sched/cls_api.c:694)
[   39.747796][    C3]  ? free_percpu.part.0 (./include/linux/spinlock.h:408 (discriminator 3) mm/percpu.c:2283 (discriminator 3))
[   39.747802][    C3]  tcf_action_rcu_free (net/sched/act_api.c:130 net/sched/act_api.c:370 net/sched/act_api.c:378)
[   39.747804][    C3]  ? rcu_do_batch (./include/linux/rcupdate.h:310 (discriminator 2) kernel/rcu/tree.c:2619 (discriminator 2))
[   39.747806][    C3]  rcu_do_batch (kernel/rcu/tree.c:2617)
[   39.747809][    C3]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[   39.747813][    C3]  ? trace_rcu_batch_end (./include/trace/events/rcu.h:714 (discriminator 19))
[   39.747816][    C3]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   39.747819][    C3]  ? 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)
[   39.747821][    C3]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[   39.747822][    C3]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   39.747824][    C3]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:178 (discriminator 6) kernel/locking/spinlock.c:198 (discriminator 6))
[   39.747826][    C3]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:179 (discriminator 1) kernel/locking/spinlock.c:198 (discriminator 1))
[   39.747830][    C3]  rcu_core (kernel/rcu/tree.c:2869)
[   39.747832][    C3]  handle_softirqs (kernel/softirq.c:622)
[   39.747835][    C3]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   39.747839][    C3]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   39.747841][    C3]  ? _local_bh_enable (kernel/softirq.c:405 (discriminator 1))
[   39.747845][    C3]  __irq_exit_rcu (kernel/softirq.c:656 kernel/softirq.c:496 kernel/softirq.c:735)
[   39.747847][    C3]  irq_exit_rcu (kernel/softirq.c:752)
[   39.747849][    C3]  sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1061 (discriminator 37) arch/x86/kernel/apic/apic.c:1061 (discriminator 37))
[   39.747851][    C3]  </IRQ>
[   39.747852][    C3]  <TASK>
[   39.747852][    C3]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   39.747855][    C3]  asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:697)
[   39.747857][    C3] RIP: 0010:pv_native_safe_halt (./arch/x86/include/asm/irqflags.h:48 arch/x86/kernel/paravirt.c:62)
[   39.747860][    C3] 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
[   39.747862][    C3] RSP: 0018:ffa0000000167de8 EFLAGS: 00000296
[   39.747864][    C3] RAX: 0000000000191dd1 RBX: ff11000001bd0040 RCX: ffffffffaa4d9667
[   39.747865][    C3] RDX: ff11000001bd0040 RSI: ffffffffad201bcb RDI: ffffffffacc6f6c0
[   39.747866][    C3] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[   39.747867][    C3] R10: 0000000000000003 R11: 0000000000000001 R12: 1ff400000002cfc0
[   39.747868][    C3] R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000
[   39.747871][    C3]  ? cpuidle_idle_call.constprop.0 (kernel/sched/idle.c:199)
[   39.747876][    C3]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   39.747878][    C3]  default_idle (./arch/x86/include/asm/paravirt.h:62 arch/x86/kernel/process.c:767)
[   39.747879][    C3]  default_idle_call (kernel/sched/idle.c:122)
[   39.747881][    C3]  cpuidle_idle_call.constprop.0 (kernel/sched/idle.c:199)
[   39.747883][    C3]  ? arch_cpu_idle_exit+0x40/0x40
[   39.747886][    C3]  ? mark_tsc_async_resets (arch/x86/kernel/tsc_sync.c:49)
[   39.747888][    C3]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   39.747891][    C3]  do_idle (kernel/sched/idle.c:352)
[   39.747894][    C3]  cpu_startup_entry (kernel/sched/idle.c:451)
[   39.747895][    C3]  start_secondary (arch/x86/kernel/smpboot.c:312)
[   39.747898][    C3]  ? set_cpu_sibling_map (./arch/x86/include/asm/smp.h:148 (discriminator 4))
[   39.747902][    C3]  common_startup_64 (arch/x86/kernel/head_64.S:418)
| [   39.757599][    C3] 1 lock held by swapper/3/0:
| [   39.757733][    C3]  #0: ffffffffad777c00 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:300 (discriminator 2) kernel/rcu/tree.c:2611 (discriminator 2))
| [   39.757975][    C3] stack backtrace:
| [   39.758050][    C3] Tainted: [W]=WARN
[   39.758050][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   39.758051][    C3] Call Trace:
[   39.758052][    C3]  <IRQ>
[   39.758053][    C3]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   39.758056][    C3]  __lock_acquire.cold (kernel/locking/lockdep.c:4830 kernel/locking/lockdep.c:4902 kernel/locking/lockdep.c:5187)
[   39.758058][    C3]  ? common_startup_64 (arch/x86/kernel/head_64.S:418)
[   39.758060][    C3]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   39.758062][    C3]  lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[   39.758064][    C3]  ? __tcf_chain_put (net/sched/cls_api.c:694)
[   39.758066][    C3]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   39.758068][    C3]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[   39.758069][    C3]  __mutex_lock (kernel/locking/mutex.c:646 kernel/locking/mutex.c:820)
[   39.758071][    C3]  ? __tcf_chain_put (net/sched/cls_api.c:694)
[   39.758073][    C3]  ? __tcf_chain_put (net/sched/cls_api.c:694)
[   39.758075][    C3]  ? ww_mutex_lock (kernel/locking/mutex.c:933)
[   39.758076][    C3]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   39.758079][    C3]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   39.758081][    C3]  ? __tcf_chain_put (net/sched/cls_api.c:694)
[   39.758082][    C3]  __tcf_chain_put (net/sched/cls_api.c:694)
[   39.758084][    C3]  ? free_percpu.part.0 (./include/linux/spinlock.h:408 (discriminator 3) mm/percpu.c:2283 (discriminator 3))
[   39.758087][    C3]  tcf_action_rcu_free (net/sched/act_api.c:130 net/sched/act_api.c:370 net/sched/act_api.c:378)
[   39.758088][    C3]  ? rcu_do_batch (./include/linux/rcupdate.h:310 (discriminator 2) kernel/rcu/tree.c:2619 (discriminator 2))
[   39.758090][    C3]  rcu_do_batch (kernel/rcu/tree.c:2617)
[   39.758092][    C3]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[   39.758094][    C3]  ? trace_rcu_batch_end (./include/trace/events/rcu.h:714 (discriminator 19))
[   39.758096][    C3]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   39.758099][    C3]  ? 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)
[   39.758100][    C3]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[   39.758101][    C3]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   39.758103][    C3]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:178 (discriminator 6) kernel/locking/spinlock.c:198 (discriminator 6))
[   39.758105][    C3]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:179 (discriminator 1) kernel/locking/spinlock.c:198 (discriminator 1))
[   39.758107][    C3]  rcu_core (kernel/rcu/tree.c:2869)
[   39.758109][    C3]  handle_softirqs (kernel/softirq.c:622)
[   39.758111][    C3]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   39.758113][    C3]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   39.758114][    C3]  ? _local_bh_enable (kernel/softirq.c:405 (discriminator 1))
[   39.758116][    C3]  __irq_exit_rcu (kernel/softirq.c:656 kernel/softirq.c:496 kernel/softirq.c:735)
[   39.758118][    C3]  irq_exit_rcu (kernel/softirq.c:752)
[   39.758119][    C3]  sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1061 (discriminator 37) arch/x86/kernel/apic/apic.c:1061 (discriminator 37))
[   39.758121][    C3]  </IRQ>
[   39.758122][    C3]  <TASK>
[   39.758122][    C3]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   39.758124][    C3]  asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:697)
[   39.758126][    C3] RIP: 0010:pv_native_safe_halt (./arch/x86/include/asm/irqflags.h:48 arch/x86/kernel/paravirt.c:62)
[   39.758128][    C3] 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
[   39.758129][    C3] RSP: 0018:ffa0000000167de8 EFLAGS: 00000296
[   39.758130][    C3] RAX: 0000000000191dd1 RBX: ff11000001bd0040 RCX: ffffffffaa4d9667
[   39.758131][    C3] RDX: ff11000001bd0040 RSI: ffffffffad201bcb RDI: ffffffffacc6f6c0
[   39.758132][    C3] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[   39.758133][    C3] R10: 0000000000000003 R11: 0000000000000001 R12: 1ff400000002cfc0
[   39.758133][    C3] R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000
[   39.758135][    C3]  ? cpuidle_idle_call.constprop.0 (kernel/sched/idle.c:199)
[   39.758137][    C3]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   39.758139][    C3]  default_idle (./arch/x86/include/asm/paravirt.h:62 arch/x86/kernel/process.c:767)
[   39.758140][    C3]  default_idle_call (kernel/sched/idle.c:122)
[   39.758142][    C3]  cpuidle_idle_call.constprop.0 (kernel/sched/idle.c:199)
[   39.758144][    C3]  ? arch_cpu_idle_exit+0x40/0x40
[   39.758145][    C3]  ? mark_tsc_async_resets (arch/x86/kernel/tsc_sync.c:49)
[   39.758147][    C3]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   39.758148][    C3]  do_idle (kernel/sched/idle.c:352)
[   39.758150][    C3]  cpu_startup_entry (kernel/sched/idle.c:451)
[   39.758151][    C3]  start_secondary (arch/x86/kernel/smpboot.c:312)
[   39.758153][    C3]  ? 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