======================================
| [   15.012746][    C3] 1 lock held by swapper/3/0:
| [ 15.012935][ C3] #0: ffffffffa2988a40 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) 
| [   15.013269][    C3]
| [   15.013269][    C3] stack backtrace:
[   15.013505][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.013507][    C3] Call Trace:
[   15.013509][    C3]  <IRQ>
[ 15.013511][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.013518][ C3] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) 
[ 15.013523][ C3] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) 
[ 15.013527][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 15.013532][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 15.013536][ C3] ? save_trace (kernel/locking/lockdep.c:594) 
[ 15.013540][ C3] mark_lock (kernel/locking/lockdep.c:4754) 
[ 15.013544][ C3] mark_usage (kernel/locking/lockdep.c:4643) 
[ 15.013548][ C3] __lock_acquire (kernel/locking/lockdep.c:5189) 
[ 15.013553][ C3] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 15.013557][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 15.013560][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 15.013565][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 15.013569][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 15.013572][ C3] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 15.013575][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 15.013578][ C3] simple_pin_fs (fs/libfs.c:1066) 
[ 15.013581][ C3] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 15.013584][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 15.013590][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 15.013593][ C3] ? __sk_destruct (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:400 ./include/linux/refcount.h:389 ./include/linux/refcount.h:432 ./include/linux/refcount.h:450 ./include/net/net_namespace.h:287 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 15.013599][ C3] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 15.013602][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 15.013604][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.013608][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 15.013612][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.013615][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.013619][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.013622][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.013625][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.013630][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 15.013633][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.013636][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.013641][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 15.013646][ C3] __put_net (net/core/net_namespace.c:732) 
[ 15.013652][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 15.013655][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.013657][ C3] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 15.013661][ C3] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 15.013665][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 15.013669][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 15.013672][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 15.013675][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.013680][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 15.013685][ C3] handle_softirqs (kernel/softirq.c:580) 
[ 15.013690][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.013694][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.013697][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   15.013700][    C3]  </IRQ>
[   15.013701][    C3]  <TASK>
[ 15.013703][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.013705][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.013709][ C3] Code: 60 d3 00 c3 cc cc cc cc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d a3 c5 25 00 fb f4 <e9> 7c 57 02 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
All code
========
   0:	60                   	(bad)
   1:	d3 00                	roll   %cl,(%rax)
   3:	c3                   	ret
   4:	cc                   	int3
   5:	cc                   	int3
   6:	cc                   	int3
   7:	cc                   	int3
   8:	0f 1f 00             	nopl   (%rax)
   b:	90                   	nop
   c:	90                   	nop
   d:	90                   	nop
   e:	90                   	nop
   f:	90                   	nop
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
  16:	90                   	nop
  17:	90                   	nop
  18:	90                   	nop
  19:	90                   	nop
  1a:	90                   	nop
  1b:	f3 0f 1e fa          	endbr64
  1f:	66 90                	xchg   %ax,%ax
  21:	0f 00 2d a3 c5 25 00 	verw   0x25c5a3(%rip)        # 0x25c5cb
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	e9 7c 57 02 00       	jmp    0x257ab		<-- trapping instruction
  2f:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  36:	00 00 00 
  39:	66 90                	xchg   %ax,%ax
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	90                   	nop
  3f:	90                   	nop

Code starting with the faulting instruction
===========================================
   0:	e9 7c 57 02 00       	jmp    0x25781
   5:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   c:	00 00 00 
   f:	66 90                	xchg   %ax,%ax
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
[   15.013712][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000242
[   15.013715][    C3] RAX: 0000000000038873 RBX: 1ffff9200002afc1 RCX: ffffffffa1236a39
[   15.013717][    C3] RDX: 0000000000000000 RSI: ffffffffa1f0e9f8 RDI: ffffffffa1653e80
[   15.013719][    C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed100d9f667a
[   15.013720][    C3] R10: ffff88806cfb33d3 R11: 0000000000000000 R12: 0000000000000000
[   15.013722][    C3] R13: ffff888001b5c640 R14: dffffc0000000000 R15: 0000000000000000
[ 15.013726][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 15.013732][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.013735][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.013738][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.013742][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 15.013746][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 15.013751][ C3] do_idle (kernel/sched/idle.c:325) 
[ 15.013755][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.013758][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.013762][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 15.013766][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   15.029122][    C3] RCU nest depth: 0, expected: 0
| [   15.029290][    C3] INFO: lockdep is turned off.
| [   15.029466][    C3] Preemption disabled at:
| [ 15.029468][ C3] 0x0 
[   15.029774][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.029776][    C3] Call Trace:
[   15.029777][    C3]  <IRQ>
[ 15.029779][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.029785][ C3] __might_resched (kernel/sched/core.c:8819) 
[ 15.029790][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 15.029796][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 15.029800][ C3] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 15.029804][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 15.029809][ C3] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 15.029814][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 15.029817][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 15.029823][ C3] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 15.029827][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 15.029830][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 15.029834][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 15.029837][ C3] ? __sk_destruct (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:400 ./include/linux/refcount.h:389 ./include/linux/refcount.h:432 ./include/linux/refcount.h:450 ./include/net/net_namespace.h:287 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 15.029840][ C3] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 15.029844][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 15.029846][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.029851][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 15.029854][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.029857][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.029860][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.029863][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.029867][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.029870][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 15.029873][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.029876][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.029880][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 15.029885][ C3] __put_net (net/core/net_namespace.c:732) 
[ 15.029889][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 15.029892][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.029895][ C3] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 15.029898][ C3] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 15.029902][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 15.029906][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 15.029909][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 15.029912][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.029917][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 15.029921][ C3] handle_softirqs (kernel/softirq.c:580) 
[ 15.029927][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.029930][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.029933][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   15.029936][    C3]  </IRQ>
[   15.029937][    C3]  <TASK>
[ 15.029939][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.029941][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.029945][ C3] Code: 60 d3 00 c3 cc cc cc cc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d a3 c5 25 00 fb f4 <e9> 7c 57 02 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
All code
========
   0:	60                   	(bad)
   1:	d3 00                	roll   %cl,(%rax)
   3:	c3                   	ret
   4:	cc                   	int3
   5:	cc                   	int3
   6:	cc                   	int3
   7:	cc                   	int3
   8:	0f 1f 00             	nopl   (%rax)
   b:	90                   	nop
   c:	90                   	nop
   d:	90                   	nop
   e:	90                   	nop
   f:	90                   	nop
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
  16:	90                   	nop
  17:	90                   	nop
  18:	90                   	nop
  19:	90                   	nop
  1a:	90                   	nop
  1b:	f3 0f 1e fa          	endbr64
  1f:	66 90                	xchg   %ax,%ax
  21:	0f 00 2d a3 c5 25 00 	verw   0x25c5a3(%rip)        # 0x25c5cb
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	e9 7c 57 02 00       	jmp    0x257ab		<-- trapping instruction
  2f:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  36:	00 00 00 
  39:	66 90                	xchg   %ax,%ax
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	90                   	nop
  3f:	90                   	nop

Code starting with the faulting instruction
===========================================
   0:	e9 7c 57 02 00       	jmp    0x25781
   5:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   c:	00 00 00 
   f:	66 90                	xchg   %ax,%ax
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
[   15.029947][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000242
[   15.029950][    C3] RAX: 0000000000038873 RBX: 1ffff9200002afc1 RCX: ffffffffa1236a39
[   15.029952][    C3] RDX: 0000000000000000 RSI: ffffffffa1f0e9f8 RDI: ffffffffa1653e80
[   15.029953][    C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed100d9f667a
[   15.029955][    C3] R10: ffff88806cfb33d3 R11: 0000000000000000 R12: 0000000000000000
[   15.029957][    C3] R13: ffff888001b5c640 R14: dffffc0000000000 R15: 0000000000000000
[ 15.029960][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 15.029965][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.029969][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.029972][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.029975][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 15.029980][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 15.029984][ C3] do_idle (kernel/sched/idle.c:325) 
[ 15.029988][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.029991][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.029995][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 15.030000][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   16.096294][    C3] INFO: lockdep is turned off.
| [   16.096471][    C3] Preemption disabled at:
| [ 16.096472][ C3] 0x0 
| [   16.096780][    C3] Tainted: [W]=WARN
[   16.096781][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.096784][    C3] Call Trace:
[   16.096785][    C3]  <IRQ>
[ 16.096787][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 16.096796][ C3] __might_resched (kernel/sched/core.c:8819) 
[ 16.096802][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 16.096807][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 16.096811][ C3] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 16.096815][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.096821][ C3] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 16.096826][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 16.096829][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 16.096835][ C3] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 16.096839][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 16.096842][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 16.096847][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 16.096849][ C3] ? __sk_destruct (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:400 ./include/linux/refcount.h:389 ./include/linux/refcount.h:432 ./include/linux/refcount.h:450 ./include/net/net_namespace.h:287 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 16.096853][ C3] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 16.096857][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 16.096859][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 16.096865][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 16.096869][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.096872][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 16.096876][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 16.096879][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 16.096883][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 16.096886][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 16.096890][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 16.096892][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 16.096897][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 16.096900][ C3] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 16.096906][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.096911][ C3] __put_net (net/core/net_namespace.c:732) 
[ 16.096915][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 16.096918][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 16.096921][ C3] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 16.096926][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 16.096931][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.096935][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 16.096940][ C3] handle_softirqs (kernel/softirq.c:580) 
[ 16.096946][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 16.096949][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 16.096953][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   16.096956][    C3]  </IRQ>
[   16.096957][    C3]  <TASK>
[ 16.096959][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.096962][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 16.096965][ C3] Code: 60 d3 00 c3 cc cc cc cc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d a3 c5 25 00 fb f4 <e9> 7c 57 02 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
All code
========
   0:	60                   	(bad)
   1:	d3 00                	roll   %cl,(%rax)
   3:	c3                   	ret
   4:	cc                   	int3
   5:	cc                   	int3
   6:	cc                   	int3
   7:	cc                   	int3
   8:	0f 1f 00             	nopl   (%rax)
   b:	90                   	nop
   c:	90                   	nop
   d:	90                   	nop
   e:	90                   	nop
   f:	90                   	nop
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
  16:	90                   	nop
  17:	90                   	nop
  18:	90                   	nop
  19:	90                   	nop
  1a:	90                   	nop
  1b:	f3 0f 1e fa          	endbr64
  1f:	66 90                	xchg   %ax,%ax
  21:	0f 00 2d a3 c5 25 00 	verw   0x25c5a3(%rip)        # 0x25c5cb
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	e9 7c 57 02 00       	jmp    0x257ab		<-- trapping instruction
  2f:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  36:	00 00 00 
  39:	66 90                	xchg   %ax,%ax
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	90                   	nop
  3f:	90                   	nop

Code starting with the faulting instruction
===========================================
   0:	e9 7c 57 02 00       	jmp    0x25781
   5:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   c:	00 00 00 
   f:	66 90                	xchg   %ax,%ax
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
[   16.096968][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000246
[   16.096972][    C3] RAX: 0000000000000003 RBX: 1ffff9200002afc1 RCX: ffffffffa1236a39
[   16.096974][    C3] RDX: ffffed100d9f667b RSI: ffffffffa1653e00 RDI: ffffffff9e79310f
[   16.096976][    C3] RBP: 0000000000000000 R08: 0000000000000000 R09: ffffed100d9f667a
[   16.096978][    C3] R10: ffff88806cfb33d3 R11: ffff888001b44b58 R12: 0000000000000000
[   16.096980][    C3] R13: ffff888001b5c640 R14: dffffc0000000000 R15: 0000000000000000
[ 16.096984][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 16.096988][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 16.096992][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 16.096995][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 16.096999][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 16.097002][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 16.097006][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 16.097011][ C3] do_idle (kernel/sched/idle.c:325) 
[ 16.097015][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 16.097018][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 16.097022][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 16.097026][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   17.134640][    C3] INFO: lockdep is turned off.
| [   17.134811][    C3] Preemption disabled at:
| [ 17.134813][ C3] 0x0 
| [   17.135122][    C3] Tainted: [W]=WARN
[   17.135123][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   17.135125][    C3] Call Trace:
[   17.135127][    C3]  <IRQ>
[ 17.135129][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 17.135137][ C3] __might_resched (kernel/sched/core.c:8819) 
[ 17.135143][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 17.135149][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 17.135153][ C3] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 17.135157][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.135162][ C3] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 17.135167][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 17.135170][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 17.135176][ C3] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 17.135181][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 17.135184][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 17.135189][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 17.135191][ C3] ? __sk_destruct (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:400 ./include/linux/refcount.h:389 ./include/linux/refcount.h:432 ./include/linux/refcount.h:450 ./include/net/net_namespace.h:287 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 17.135195][ C3] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 17.135199][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 17.135202][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 17.135207][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 17.135212][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.135216][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 17.135219][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 17.135222][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.135226][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.135230][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 17.135233][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.135235][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 17.135240][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 17.135243][ C3] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 17.135247][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.135252][ C3] __put_net (net/core/net_namespace.c:732) 
[ 17.135256][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 17.135259][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 17.135262][ C3] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 17.135267][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 17.135272][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.135276][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 17.135281][ C3] handle_softirqs (kernel/softirq.c:580) 
[ 17.135287][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 17.135291][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 17.135294][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   17.135297][    C3]  </IRQ>
[   17.135298][    C3]  <TASK>
[ 17.135300][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.135303][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 17.135306][ C3] Code: 60 d3 00 c3 cc cc cc cc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d a3 c5 25 00 fb f4 <e9> 7c 57 02 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
All code
========
   0:	60                   	(bad)
   1:	d3 00                	roll   %cl,(%rax)
   3:	c3                   	ret
   4:	cc                   	int3
   5:	cc                   	int3
   6:	cc                   	int3
   7:	cc                   	int3
   8:	0f 1f 00             	nopl   (%rax)
   b:	90                   	nop
   c:	90                   	nop
   d:	90                   	nop
   e:	90                   	nop
   f:	90                   	nop
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
  16:	90                   	nop
  17:	90                   	nop
  18:	90                   	nop
  19:	90                   	nop
  1a:	90                   	nop
  1b:	f3 0f 1e fa          	endbr64
  1f:	66 90                	xchg   %ax,%ax
  21:	0f 00 2d a3 c5 25 00 	verw   0x25c5a3(%rip)        # 0x25c5cb
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	e9 7c 57 02 00       	jmp    0x257ab		<-- trapping instruction
  2f:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  36:	00 00 00 
  39:	66 90                	xchg   %ax,%ax
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	90                   	nop
  3f:	90                   	nop

Code starting with the faulting instruction
===========================================
   0:	e9 7c 57 02 00       	jmp    0x25781
   5:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   c:	00 00 00 
   f:	66 90                	xchg   %ax,%ax
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
[   17.135309][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000246
[   17.135313][    C3] RAX: 0000000000000003 RBX: 1ffff9200002afc1 RCX: ffffffffa1236a39
[   17.135315][    C3] RDX: ffffed100d9f667b RSI: ffffffffa1653e00 RDI: ffffffff9e79310f
[   17.135317][    C3] RBP: 0000000000000000 R08: 0000000000000000 R09: ffffed100d9f667a
[   17.135319][    C3] R10: ffff88806cfb33d3 R11: ffff888001b44b58 R12: 0000000000000000
[   17.135321][    C3] R13: ffff888001b5c640 R14: dffffc0000000000 R15: 0000000000000000
[ 17.135325][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 17.135328][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.135333][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 17.135336][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.135339][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.135343][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 17.135347][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 17.135351][ C3] do_idle (kernel/sched/idle.c:325) 
[ 17.135355][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.135358][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 17.135362][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 17.135367][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   18.229500][    C3] INFO: lockdep is turned off.
| [   18.229658][    C3] Preemption disabled at:
| [ 18.229660][ C3] handle_softirqs (kernel/softirq.c:553) 
| [   18.229992][    C3] Tainted: [W]=WARN
[   18.229993][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   18.229995][    C3] Call Trace:
[   18.229997][    C3]  <TASK>
[ 18.229999][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 18.230006][ C3] __might_resched (kernel/sched/core.c:8819) 
[ 18.230012][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 18.230017][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 18.230020][ C3] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 18.230024][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 18.230030][ C3] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 18.230034][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 18.230037][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 18.230044][ C3] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 18.230048][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 18.230052][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 18.230056][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 18.230059][ C3] ? __sk_destruct (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:400 ./include/linux/refcount.h:389 ./include/linux/refcount.h:432 ./include/linux/refcount.h:450 ./include/net/net_namespace.h:287 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 18.230062][ C3] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 18.230067][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 18.230069][ C3] ? smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 18.230075][ C3] ? kthread (kernel/kthread.c:464) 
[ 18.230080][ C3] ? ret_from_fork (arch/x86/kernel/process.c:153) 
[ 18.230084][ C3] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 18.230088][ C3] ? migrate_enable (./arch/x86/include/asm/preempt.h:104 ./include/linux/preempt.h:481 ./include/linux/preempt.h:481 kernel/sched/core.c:2417) 
[ 18.230095][ C3] ? __pfx_migrate_enable (kernel/sched/core.c:2392) 
[ 18.230098][ C3] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 18.230102][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 18.230107][ C3] __put_net (net/core/net_namespace.c:732) 
[ 18.230111][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 18.230114][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 18.230117][ C3] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 18.230122][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 18.230126][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 18.230129][ C3] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 18.230136][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 18.230140][ C3] handle_softirqs (kernel/softirq.c:580) 
[ 18.230145][ C3] ? __pfx_run_ksoftirqd (kernel/softirq.c:961) 
[ 18.230149][ C3] run_ksoftirqd (kernel/softirq.c:436 kernel/softirq.c:969 kernel/softirq.c:960) 
[ 18.230153][ C3] smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 18.230156][ C3] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[ 18.230159][ C3] kthread (kernel/kthread.c:464) 
[ 18.230163][ C3] ? __pfx_kthread (kernel/kthread.c:413) 
[ 18.230166][ C3] ? ret_from_fork (arch/x86/kernel/process.c:152) 
[ 18.230169][ C3] ? __lock_release (kernel/locking/lockdep.c:5534) 
[ 18.230173][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 18.230177][ C3] ? __pfx_kthread (kernel/kthread.c:413) 
[ 18.230180][ C3] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 18.230183][ C3] ? __pfx_kthread (kernel/kthread.c:413) 


Finger prints:
mark_lock_irq:mark_lock:mark_usage:__lock_acquire:_raw_spin_lock
handle_softirqs:dump_stack_lvl:__might_resched:down_write:simple_recursive_removal
__might_resched:down_write:simple_recursive_removal:debugfs_remove:ref_tracker_dir_exit