======================================
| [   18.519371][    C0] 1 lock held by swapper/0/0:
| [ 18.519617][ C0] #0: ffffffffa9374480 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) 
| [   18.520265][    C0]
| [   18.520265][    C0] stack backtrace:
[   18.520705][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   18.520707][    C0] Call Trace:
[   18.520710][    C0]  <IRQ>
[ 18.520713][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 18.520723][ C0] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) 
[ 18.520733][ C0] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) 
[ 18.520740][ C0] ? is_bpf_text_address (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 kernel/bpf/core.c:774) 
[ 18.520749][ C0] ? __lock_release (kernel/locking/lockdep.c:5534) 
[ 18.520757][ C0] ? save_trace (kernel/locking/lockdep.c:594) 
[ 18.520765][ C0] mark_lock (kernel/locking/lockdep.c:4754) 
[ 18.520771][ C0] mark_usage (kernel/locking/lockdep.c:4643) 
[ 18.520777][ C0] __lock_acquire (kernel/locking/lockdep.c:5189) 
[ 18.520785][ C0] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 18.520791][ C0] ? simple_pin_fs (fs/libfs.c:1066) 
[ 18.520798][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 18.520806][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 18.520810][ C0] ? simple_pin_fs (fs/libfs.c:1066) 
[ 18.520818][ C0] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 18.520823][ C0] ? simple_pin_fs (fs/libfs.c:1066) 
[ 18.520828][ C0] simple_pin_fs (fs/libfs.c:1066) 
[ 18.520835][ C0] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 18.520841][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 18.520849][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 18.520854][ C0] ? __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:2333) 
[ 18.520864][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 18.520870][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 18.520875][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 18.520879][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 18.520887][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 18.520893][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 18.520898][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 18.520902][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 18.520906][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 18.520915][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 18.520920][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 18.520925][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 18.520929][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 18.520940][ C0] __put_net (net/core/net_namespace.c:732) 
[ 18.520947][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 18.520953][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 18.520957][ C0] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 18.520964][ C0] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 18.520971][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 18.520978][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 18.520983][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 18.520989][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 18.520997][ C0] rcu_core (kernel/rcu/tree.c:2826) 
[ 18.521003][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 18.521011][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 18.521016][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 18.521019][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   18.521025][    C0]  </IRQ>
[   18.521027][    C0]  <TASK>
[ 18.521029][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 18.521034][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 18.521040][ C0] Code: b0 b8 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 d0 13 00 fb f4 <c3> cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
All code
========
   0:	b0 b8                	mov    $0xb8,%al
   2:	00 c3                	add    %al,%bl
   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 d0 13 00 	verw   0x13d0a3(%rip)        # 0x13d0cb
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	c3                   	ret		<-- trapping instruction
  2b:	cc                   	int3
  2c:	cc                   	int3
  2d:	cc                   	int3
  2e:	cc                   	int3
  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:	c3                   	ret
   1:	cc                   	int3
   2:	cc                   	int3
   3:	cc                   	int3
   4:	cc                   	int3
   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
[   18.521045][    C0] RSP: 0018:ffffffffa9007df8 EFLAGS: 00000242
[   18.521050][    C0] RAX: 00000000000715ef RBX: 1ffffffff5200fc3 RCX: ffffffffa8355a19
[   18.521054][    C0] RDX: 0000000000000000 RSI: ffffffffa8e85f31 RDI: ffffffffa8650ce0
[   18.521058][    C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1005ec667a
[   18.521060][    C0] R10: ffff88802f6333d3 R11: 0000000000000000 R12: 0000000000000000
[   18.521064][    C0] R13: ffffffffa901f240 R14: dffffc0000000000 R15: 0000000000014770
[ 18.521070][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 18.521080][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 18.521084][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 18.521089][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 18.521095][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 18.521102][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 18.521115][ C0] do_idle (kernel/sched/idle.c:325) 
[ 18.521122][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 18.521128][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 18.521133][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 18.521140][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:501) 
[ 18.521147][ C0] x86_64_start_kernel (arch/x86/kernel/head64.c:443 (discriminator 17)) 
[ 18.521154][ C0] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   18.552482][    C0] RCU nest depth: 0, expected: 0
| [   18.553043][    C0] INFO: lockdep is turned off.
| [   18.553377][    C0] Preemption disabled at:
| [ 18.553380][ C0] schedule_preempt_disabled (kernel/sched/core.c:6919) 
[   18.554136][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   18.554139][    C0] Call Trace:
[   18.554141][    C0]  <IRQ>
[ 18.554144][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 18.554152][ C0] __might_resched (kernel/sched/core.c:8819) 
[ 18.554162][ C0] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 18.554168][ C0] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 18.554173][ C0] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 18.554180][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 18.554188][ C0] ? 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) 
[ 18.554195][ C0] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 18.554200][ C0] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 18.554206][ C0] ? 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) 
[ 18.554214][ C0] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 18.554219][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 18.554227][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 18.554232][ C0] ? __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:2333) 
[ 18.554239][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 18.554246][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 18.554250][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 18.554255][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 18.554260][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 18.554266][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 18.554270][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 18.554274][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 18.554278][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 18.554284][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 18.554289][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 18.554294][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 18.554298][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 18.554309][ C0] __put_net (net/core/net_namespace.c:732) 
[ 18.554314][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 18.554321][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 18.554326][ C0] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 18.554332][ C0] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 18.554340][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 18.554345][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 18.554351][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 18.554357][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 18.554365][ C0] rcu_core (kernel/rcu/tree.c:2826) 
[ 18.554371][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 18.554380][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 18.554385][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 18.554389][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   18.554395][    C0]  </IRQ>
[   18.554397][    C0]  <TASK>
[ 18.554399][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 18.554404][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 18.554410][ C0] Code: b0 b8 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 d0 13 00 fb f4 <c3> cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
All code
========
   0:	b0 b8                	mov    $0xb8,%al
   2:	00 c3                	add    %al,%bl
   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 d0 13 00 	verw   0x13d0a3(%rip)        # 0x13d0cb
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	c3                   	ret		<-- trapping instruction
  2b:	cc                   	int3
  2c:	cc                   	int3
  2d:	cc                   	int3
  2e:	cc                   	int3
  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:	c3                   	ret
   1:	cc                   	int3
   2:	cc                   	int3
   3:	cc                   	int3
   4:	cc                   	int3
   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
[   18.554414][    C0] RSP: 0018:ffffffffa9007df8 EFLAGS: 00000242
[   18.554420][    C0] RAX: 00000000000715ef RBX: 1ffffffff5200fc3 RCX: ffffffffa8355a19
[   18.554423][    C0] RDX: 0000000000000000 RSI: ffffffffa8e85f31 RDI: ffffffffa8650ce0
[   18.554426][    C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1005ec667a
[   18.554429][    C0] R10: ffff88802f6333d3 R11: 0000000000000000 R12: 0000000000000000
[   18.554431][    C0] R13: ffffffffa901f240 R14: dffffc0000000000 R15: 0000000000014770
[ 18.554437][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 18.554445][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 18.554448][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 18.554451][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 18.554457][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 18.554463][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 18.554472][ C0] do_idle (kernel/sched/idle.c:325) 
[ 18.554478][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 18.554483][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 18.554488][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 18.554495][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:501) 
[ 18.554501][ C0] x86_64_start_kernel (arch/x86/kernel/head64.c:443 (discriminator 17)) 
[ 18.554507][ C0] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   21.452528][    C3] INFO: lockdep is turned off.
| [   21.452774][    C3] Preemption disabled at:
| [ 21.452776][ C3] 0x0 
| [   21.453134][    C3] Tainted: [W]=WARN
[   21.453135][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   21.453137][    C3] Call Trace:
[   21.453139][    C3]  <IRQ>
[ 21.453141][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 21.453150][ C3] __might_resched (kernel/sched/core.c:8819) 
[ 21.453156][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 21.453160][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 21.453163][ C3] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 21.453167][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 21.453173][ 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) 
[ 21.453178][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 21.453180][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 21.453185][ 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) 
[ 21.453189][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 21.453192][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 21.453197][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 21.453200][ 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:2333) 
[ 21.453206][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 21.453210][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 21.453213][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 21.453217][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 21.453221][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 21.453225][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 21.453228][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 21.453230][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 21.453233][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 21.453237][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 21.453240][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 21.453243][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 21.453248][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 21.453253][ C3] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 21.453258][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 21.453263][ C3] __put_net (net/core/net_namespace.c:732) 
[ 21.453266][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 21.453270][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 21.453273][ C3] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 21.453278][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 21.453281][ C3] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 21.453286][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 21.453291][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 21.453295][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 21.453299][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 21.453302][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 21.453304][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   21.453307][    C3]  </IRQ>
[   21.453308][    C3]  <TASK>
[ 21.453310][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 21.453312][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 21.453316][ C3] Code: b0 b8 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 d0 13 00 fb f4 <c3> cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
All code
========
   0:	b0 b8                	mov    $0xb8,%al
   2:	00 c3                	add    %al,%bl
   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 d0 13 00 	verw   0x13d0a3(%rip)        # 0x13d0cb
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	c3                   	ret		<-- trapping instruction
  2b:	cc                   	int3
  2c:	cc                   	int3
  2d:	cc                   	int3
  2e:	cc                   	int3
  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:	c3                   	ret
   1:	cc                   	int3
   2:	cc                   	int3
   3:	cc                   	int3
   4:	cc                   	int3
   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
[   21.453320][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000246
[   21.453324][    C3] RAX: 0000000000000003 RBX: 1ffff9200002afc1 RCX: ffffffffa8355a19
[   21.453326][    C3] RDX: ffffed1005ef667b RSI: ffffffffa8650c60 RDI: ffffffffa5b84d8f
[   21.453328][    C3] RBP: 0000000000000000 R08: 0000000000000000 R09: ffffed1005ef667a
[   21.453329][    C3] R10: ffff88802f7b33d3 R11: ffff88800be5a858 R12: 0000000000000000
[   21.453331][    C3] R13: ffff888001bb4640 R14: dffffc0000000000 R15: 0000000000000000
[ 21.453335][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 21.453339][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 21.453344][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 21.453346][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 21.453348][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 21.453352][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 21.453356][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 21.453361][ C3] do_idle (kernel/sched/idle.c:325) 
[ 21.453365][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 21.453368][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 21.453372][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 


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