======================================
| [   17.763137][    C0] 1 lock held by swapper/0/0:
| [ 17.763384][ C0] #0: ffffffffac7774c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2570) 
| [   17.763780][    C0]
| [   17.763780][    C0] stack backtrace:
[   17.764061][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   17.764063][    C0] Call Trace:
[   17.764066][    C0]  <IRQ>
[ 17.764068][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 17.764077][ C0] print_usage_bug.part.0 (kernel/locking/lockdep.c:4048) 
[ 17.764084][ C0] mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4059 kernel/locking/lockdep.c:4270) 
[ 17.764088][ C0] ? is_bpf_text_address (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 kernel/bpf/core.c:774) 
[ 17.764094][ C0] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 17.764098][ C0] ? save_trace (kernel/locking/lockdep.c:595) 
[ 17.764105][ C0] mark_lock (kernel/locking/lockdep.c:4756) 
[ 17.764108][ C0] mark_usage (kernel/locking/lockdep.c:4645) 
[ 17.764112][ C0] __lock_acquire (kernel/locking/lockdep.c:5194) 
[ 17.764115][ C0] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 17.764119][ C0] lock_acquire.part.0 (kernel/locking/lockdep.c:473 kernel/locking/lockdep.c:5873) 
[ 17.764122][ C0] ? simple_pin_fs (fs/libfs.c:1067) 
[ 17.764129][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 17.764134][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 17.764136][ C0] ? simple_pin_fs (fs/libfs.c:1067) 
[ 17.764141][ C0] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 17.764146][ C0] ? simple_pin_fs (fs/libfs.c:1067) 
[ 17.764149][ C0] simple_pin_fs (fs/libfs.c:1067) 
[ 17.764154][ C0] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 17.764159][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 17.764167][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 17.764170][ 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) 
[ 17.764178][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 17.764181][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 17.764184][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 17.764188][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 17.764194][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.764199][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 17.764202][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 17.764206][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.764208][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.764213][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 17.764215][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.764217][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 17.764221][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 17.764229][ C0] __put_net (net/core/net_namespace.c:732) 
[ 17.764233][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 17.764237][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 17.764239][ C0] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 17.764243][ C0] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 17.764247][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 17.764250][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 17.764254][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 17.764257][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 17.764262][ C0] rcu_core (kernel/rcu/tree.c:2834) 
[ 17.764267][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 17.764272][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 17.764275][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 17.764278][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   17.764281][    C0]  </IRQ>
[   17.764283][    C0]  <TASK>
[ 17.764284][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.764287][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 17.764292][ 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
[   17.764295][    C0] RSP: 0018:ffffffffac407df8 EFLAGS: 00000246
[   17.764298][    C0] RAX: 00000000000721c5 RBX: 1ffffffff5880fc3 RCX: ffffffffab7905d9
[   17.764300][    C0] RDX: 0000000000000000 RSI: ffffffffac28f4e4 RDI: ffffffffaba53be0
[   17.764302][    C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c066fa
[   17.764304][    C0] R10: ffff8880360337d3 R11: ffffffffac411288 R12: 0000000000000000
[   17.764305][    C0] R13: ffffffffac41f240 R14: dffffc0000000000 R15: 0000000000014770
[ 17.764310][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 17.764314][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 17.764317][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.764320][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.764323][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 17.764327][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60) 
[ 17.764334][ C0] do_idle (kernel/sched/idle.c:325) 
[ 17.764337][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.764340][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 17.764344][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 17.764348][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:295) 
[ 17.764354][ C0] x86_64_start_kernel (arch/x86/kernel/head64.c:231 (discriminator 17)) 
[ 17.764357][ C0] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   17.784554][    C0] RCU nest depth: 0, expected: 0
| [   17.784756][    C0] INFO: lockdep is turned off.
| [   17.784963][    C0] Preemption disabled at:
| [ 17.784965][ C0] schedule_preempt_disabled (kernel/sched/core.c:6933) 
[   17.785458][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   17.785461][    C0] Call Trace:
[   17.785463][    C0]  <IRQ>
[ 17.785465][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 17.785472][ C0] __might_resched (kernel/sched/core.c:8796) 
[ 17.785481][ C0] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 17.785487][ C0] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 17.785490][ C0] ? simple_recursive_removal (fs/libfs.c:614) 
[ 17.785496][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 17.785502][ 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) 
[ 17.785510][ C0] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 17.785513][ 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) 
[ 17.785516][ C0] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 17.785522][ C0] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 17.785526][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 17.785534][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 17.785538][ 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) 
[ 17.785545][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 17.785549][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 17.785552][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 17.785559][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 17.785565][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.785570][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 17.785574][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 17.785577][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.785580][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.785584][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 17.785586][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.785589][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 17.785592][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 17.785601][ C0] __put_net (net/core/net_namespace.c:732) 
[ 17.785606][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 17.785610][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 17.785613][ C0] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 17.785616][ C0] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 17.785623][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 17.785627][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 17.785632][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 17.785635][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 17.785640][ C0] rcu_core (kernel/rcu/tree.c:2834) 
[ 17.785645][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 17.785650][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 17.785653][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 17.785656][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   17.785660][    C0]  </IRQ>
[   17.785661][    C0]  <TASK>
[ 17.785663][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.785665][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 17.785670][ 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
[   17.785673][    C0] RSP: 0018:ffffffffac407df8 EFLAGS: 00000246
[   17.785677][    C0] RAX: 00000000000721c5 RBX: 1ffffffff5880fc3 RCX: ffffffffab7905d9
[   17.785679][    C0] RDX: 0000000000000000 RSI: ffffffffac28f4e4 RDI: ffffffffaba53be0
[   17.785681][    C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c066fa
[   17.785683][    C0] R10: ffff8880360337d3 R11: ffffffffac411288 R12: 0000000000000000
[   17.785685][    C0] R13: ffffffffac41f240 R14: dffffc0000000000 R15: 0000000000014770
[ 17.785689][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 17.785694][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 17.785697][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.785699][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.785703][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 17.785706][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60) 
[ 17.785713][ C0] do_idle (kernel/sched/idle.c:325) 
[ 17.785716][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.785719][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 17.785722][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 17.785726][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:295) 
[ 17.785731][ C0] x86_64_start_kernel (arch/x86/kernel/head64.c:231 (discriminator 17)) 
[ 17.785736][ C0] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   20.848499][    C1] INFO: lockdep is turned off.
| [   20.848795][    C1] Preemption disabled at:
| [ 20.848798][ C1] handle_softirqs (kernel/softirq.c:553) 
| [   20.849378][    C1] Tainted: [W]=WARN
[   20.849381][    C1] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   20.849384][    C1] Call Trace:
[   20.849388][    C1]  <TASK>
[ 20.849392][ C1] dump_stack_lvl (lib/dump_stack.c:123) 
[ 20.849404][ C1] __might_resched (kernel/sched/core.c:8796) 
[ 20.849416][ C1] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 20.849424][ C1] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 20.849431][ C1] ? simple_recursive_removal (fs/libfs.c:614) 
[ 20.849439][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 20.849447][ C1] ? 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) 
[ 20.849457][ C1] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 20.849462][ C1] ? 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) 
[ 20.849468][ C1] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 20.849479][ C1] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 20.849484][ C1] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 20.849495][ C1] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 20.849500][ C1] ? __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) 
[ 20.849510][ C1] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 20.849516][ C1] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 20.849522][ C1] ? smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 20.849529][ C1] ? kthread (kernel/kthread.c:464) 
[ 20.849534][ C1] ? ret_from_fork (arch/x86/kernel/process.c:148) 
[ 20.849542][ C1] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 20.849551][ C1] ? migrate_enable (./arch/x86/include/asm/preempt.h:104 ./include/linux/preempt.h:481 ./include/linux/preempt.h:481 kernel/sched/core.c:2427) 
[ 20.849558][ C1] ? __pfx_migrate_enable (kernel/sched/core.c:2402) 
[ 20.849564][ C1] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 20.849571][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 20.849580][ C1] __put_net (net/core/net_namespace.c:732) 
[ 20.849587][ C1] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 20.849594][ C1] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 20.849599][ C1] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 20.849608][ C1] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 20.849615][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 20.849620][ C1] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 20.849634][ C1] rcu_core (kernel/rcu/tree.c:2834) 
[ 20.849655][ C1] handle_softirqs (kernel/softirq.c:579) 
[ 20.849663][ C1] ? __pfx_run_ksoftirqd (kernel/softirq.c:961) 
[ 20.849670][ C1] run_ksoftirqd (kernel/softirq.c:436 kernel/softirq.c:969 kernel/softirq.c:960) 
[ 20.849675][ C1] smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 20.849680][ C1] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[ 20.849686][ C1] kthread (kernel/kthread.c:464) 
[ 20.849691][ C1] ? __pfx_kthread (kernel/kthread.c:413) 
[ 20.849694][ C1] ? ret_from_fork (arch/x86/kernel/process.c:147) 
[ 20.849699][ C1] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 20.849706][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 20.849711][ C1] ? __pfx_kthread (kernel/kthread.c:413) 
[ 20.849717][ C1] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 20.849722][ C1] ? __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