======================================
| [   15.453040][    C0] 1 lock held by swapper/0/0:
| [ 15.453250][ C0] #0: ffffffffa7b774c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2570) 
| [   15.453615][    C0]
| [   15.453615][    C0] stack backtrace:
[   15.453876][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.453878][    C0] Call Trace:
[   15.453880][    C0]  <IRQ>
[ 15.453881][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.453887][ C0] print_usage_bug.part.0 (kernel/locking/lockdep.c:4048) 
[ 15.453892][ C0] mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4059 kernel/locking/lockdep.c:4270) 
[ 15.453895][ C0] ? is_bpf_text_address (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 kernel/bpf/core.c:774) 
[ 15.453900][ C0] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 15.453904][ C0] ? save_trace (kernel/locking/lockdep.c:595) 
[ 15.453910][ C0] mark_lock (kernel/locking/lockdep.c:4756) 
[ 15.453913][ C0] mark_usage (kernel/locking/lockdep.c:4645) 
[ 15.453916][ C0] __lock_acquire (kernel/locking/lockdep.c:5194) 
[ 15.453920][ C0] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 15.453924][ C0] lock_acquire.part.0 (kernel/locking/lockdep.c:473 kernel/locking/lockdep.c:5873) 
[ 15.453927][ C0] ? simple_pin_fs (fs/libfs.c:1067) 
[ 15.453931][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 15.453935][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 15.453938][ C0] ? simple_pin_fs (fs/libfs.c:1067) 
[ 15.453942][ C0] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 15.453946][ C0] ? simple_pin_fs (fs/libfs.c:1067) 
[ 15.453949][ C0] simple_pin_fs (fs/libfs.c:1067) 
[ 15.453953][ C0] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 15.453956][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 15.453962][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 15.453965][ 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:2376) 
[ 15.453971][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.453973][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 15.453977][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.453979][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 15.453984][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.453988][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 15.453991][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 15.453993][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.453996][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.453999][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 15.454001][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.454003][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 15.454006][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 15.454012][ C0] __put_net (net/core/net_namespace.c:732) 
[ 15.454015][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 15.454019][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.454021][ C0] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.454025][ C0] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 15.454029][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 15.454032][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 15.454036][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 15.454039][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.454043][ C0] rcu_core (kernel/rcu/tree.c:2834) 
[ 15.454048][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 15.454053][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.454056][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.454059][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   15.454062][    C0]  </IRQ>
[   15.454063][    C0]  <TASK>
[ 15.454065][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.454068][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 15.454072][ C0] Code: 92 b5 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 83 37 10 00 fb f4 <e9> fc 54 02 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
All code
========
   0:	92                   	xchg   %eax,%edx
   1:	b5 00                	mov    $0x0,%ch
   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 83 37 10 00 	verw   0x103783(%rip)        # 0x1037ab
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	e9 fc 54 02 00       	jmp    0x2552b		<-- 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 fc 54 02 00       	jmp    0x25501
   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
[   15.454074][    C0] RSP: 0018:ffffffffa7807df8 EFLAGS: 00000246
[   15.454078][    C0] RAX: 0000000000066f27 RBX: 1ffffffff4f00fc3 RCX: ffffffffa6b905d9
[   15.454080][    C0] RDX: 0000000000000000 RSI: ffffffffa768f4e4 RDI: ffffffffa6e53be0
[   15.454081][    C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1005e866fa
[   15.454083][    C0] R10: ffff88802f4337d3 R11: ffffffffa7811288 R12: 0000000000000000
[   15.454085][    C0] R13: ffffffffa781f240 R14: dffffc0000000000 R15: 0000000000014770
[ 15.454089][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 15.454093][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 15.454096][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.454098][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.454101][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 15.454105][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60) 
[ 15.454110][ C0] do_idle (kernel/sched/idle.c:325) 
[ 15.454113][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.454116][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 15.454120][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 15.454124][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:295) 
[ 15.454128][ C0] x86_64_start_kernel (arch/x86/kernel/head64.c:231 (discriminator 17)) 
[ 15.454132][ C0] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   15.472610][    C0] RCU nest depth: 0, expected: 0
| [   15.472818][    C0] INFO: lockdep is turned off.
| [   15.473008][    C0] Preemption disabled at:
| [ 15.473010][ C0] schedule_preempt_disabled (kernel/sched/core.c:6933) 
[   15.473579][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.473580][    C0] Call Trace:
[   15.473582][    C0]  <IRQ>
[ 15.473583][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.473589][ C0] __might_resched (kernel/sched/core.c:8796) 
[ 15.473596][ C0] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 15.473600][ C0] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 15.473603][ C0] ? simple_recursive_removal (fs/libfs.c:614) 
[ 15.473607][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 15.473611][ 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) 
[ 15.473616][ C0] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 15.473619][ 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) 
[ 15.473622][ C0] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 15.473627][ C0] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 15.473630][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 15.473636][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 15.473639][ 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:2376) 
[ 15.473644][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.473647][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 15.473650][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.473655][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 15.473659][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.473663][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 15.473666][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 15.473669][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.473672][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.473675][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 15.473677][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.473680][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 15.473683][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 15.473690][ C0] __put_net (net/core/net_namespace.c:732) 
[ 15.473694][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 15.473698][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.473700][ C0] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.473704][ C0] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 15.473709][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 15.473712][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 15.473716][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 15.473719][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.473724][ C0] rcu_core (kernel/rcu/tree.c:2834) 
[ 15.473728][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 15.473734][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.473737][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.473739][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   15.473743][    C0]  </IRQ>
[   15.473744][    C0]  <TASK>
[ 15.473745][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.473748][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 15.473752][ C0] Code: 92 b5 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 83 37 10 00 fb f4 <e9> fc 54 02 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
All code
========
   0:	92                   	xchg   %eax,%edx
   1:	b5 00                	mov    $0x0,%ch
   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 83 37 10 00 	verw   0x103783(%rip)        # 0x1037ab
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	e9 fc 54 02 00       	jmp    0x2552b		<-- 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 fc 54 02 00       	jmp    0x25501
   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
[   15.473755][    C0] RSP: 0018:ffffffffa7807df8 EFLAGS: 00000246
[   15.473758][    C0] RAX: 0000000000066f27 RBX: 1ffffffff4f00fc3 RCX: ffffffffa6b905d9
[   15.473760][    C0] RDX: 0000000000000000 RSI: ffffffffa768f4e4 RDI: ffffffffa6e53be0
[   15.473762][    C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1005e866fa
[   15.473763][    C0] R10: ffff88802f4337d3 R11: ffffffffa7811288 R12: 0000000000000000
[   15.473765][    C0] R13: ffffffffa781f240 R14: dffffc0000000000 R15: 0000000000014770
[ 15.473769][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 15.473773][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 15.473776][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.473778][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.473782][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 15.473785][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60) 
[ 15.473790][ C0] do_idle (kernel/sched/idle.c:325) 
[ 15.473794][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.473796][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 15.473800][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 15.473804][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:295) 
[ 15.473808][ C0] x86_64_start_kernel (arch/x86/kernel/head64.c:231 (discriminator 17)) 
[ 15.473812][ C0] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   17.317387][    C3] INFO: lockdep is turned off.
| [   17.317546][    C3] Preemption disabled at:
| [ 17.317548][ C3] handle_softirqs (kernel/softirq.c:553) 
| [   17.317883][    C3] Tainted: [W]=WARN
[   17.317885][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   17.317887][    C3] Call Trace:
[   17.317889][    C3]  <TASK>
[ 17.317891][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 17.317898][ C3] __might_resched (kernel/sched/core.c:8796) 
[ 17.317905][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 17.317910][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 17.317913][ C3] ? simple_recursive_removal (fs/libfs.c:614) 
[ 17.317917][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 17.317922][ 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) 
[ 17.317928][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 17.317931][ 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) 
[ 17.317934][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 17.317940][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 17.317943][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 17.317949][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 17.317952][ 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:2376) 
[ 17.317958][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 17.317961][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 17.317965][ C3] ? smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 17.317969][ C3] ? kthread (kernel/kthread.c:464) 
[ 17.317972][ C3] ? ret_from_fork (arch/x86/kernel/process.c:148) 
[ 17.317976][ C3] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 17.317981][ C3] ? migrate_enable (./arch/x86/include/asm/preempt.h:104 ./include/linux/preempt.h:481 ./include/linux/preempt.h:481 kernel/sched/core.c:2427) 
[ 17.317985][ C3] ? __pfx_migrate_enable (kernel/sched/core.c:2402) 
[ 17.317988][ C3] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 17.317993][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 17.317997][ C3] __put_net (net/core/net_namespace.c:732) 
[ 17.318001][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 17.318005][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 17.318007][ C3] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 17.318011][ C3] ? __schedule (kernel/sched/core.c:6658) 
[ 17.318017][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 17.318021][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 17.318024][ C3] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 17.318031][ C3] rcu_core (kernel/rcu/tree.c:2834) 
[ 17.318036][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 17.318040][ C3] ? __pfx_run_ksoftirqd (kernel/softirq.c:961) 
[ 17.318043][ C3] run_ksoftirqd (kernel/softirq.c:436 kernel/softirq.c:969 kernel/softirq.c:960) 
[ 17.318046][ C3] smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 17.318050][ C3] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[ 17.318054][ C3] kthread (kernel/kthread.c:464) 
[ 17.318057][ C3] ? __pfx_kthread (kernel/kthread.c:413) 
[ 17.318059][ C3] ? ret_from_fork (arch/x86/kernel/process.c:147) 
[ 17.318061][ C3] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 17.318065][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 17.318068][ C3] ? __pfx_kthread (kernel/kthread.c:413) 
[ 17.318071][ C3] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 17.318074][ 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
schedule_preempt_disabled:dump_stack_lvl:__might_resched:down_write:simple_recursive_removal