======================================
| [   15.724902][    C2] 1 lock held by swapper/2/0:
| [ 15.725094][ C2] #0: ffffffffafd774c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2570) 
| [   15.725428][    C2]
| [   15.725428][    C2] stack backtrace:
[   15.725672][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.725674][    C2] Call Trace:
[   15.725676][    C2]  <IRQ>
[ 15.725678][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.725686][ C2] print_usage_bug.part.0 (kernel/locking/lockdep.c:4048) 
[ 15.725690][ C2] mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4059 kernel/locking/lockdep.c:4270) 
[ 15.725695][ C2] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 15.725702][ C2] ? save_trace (kernel/locking/lockdep.c:595) 
[ 15.725709][ C2] mark_lock (kernel/locking/lockdep.c:4756) 
[ 15.725713][ C2] mark_usage (kernel/locking/lockdep.c:4645) 
[ 15.725716][ C2] __lock_acquire (kernel/locking/lockdep.c:5194) 
[ 15.725719][ C2] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 15.725723][ C2] lock_acquire.part.0 (kernel/locking/lockdep.c:473 kernel/locking/lockdep.c:5873) 
[ 15.725726][ C2] ? simple_pin_fs (fs/libfs.c:1067) 
[ 15.725730][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 15.725734][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 15.725737][ C2] ? simple_pin_fs (fs/libfs.c:1067) 
[ 15.725742][ C2] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 15.725745][ C2] ? simple_pin_fs (fs/libfs.c:1067) 
[ 15.725748][ C2] simple_pin_fs (fs/libfs.c:1067) 
[ 15.725752][ C2] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 15.725755][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 15.725766][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 15.725769][ C2] ? __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) 
[ 15.725774][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.725777][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 15.725780][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.725783][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 15.725788][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.725792][ C2] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 15.725796][ C2] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 15.725798][ C2] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.725801][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.725806][ C2] ? do_idle (kernel/sched/idle.c:325) 
[ 15.725808][ C2] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.725810][ C2] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.725815][ C2] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 15.725825][ C2] __put_net (net/core/net_namespace.c:732) 
[ 15.725831][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 15.725835][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.725837][ C2] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.725840][ C2] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 15.725845][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 15.725848][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 15.725851][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 15.725854][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.725859][ C2] rcu_core (kernel/rcu/tree.c:2834) 
[ 15.725864][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 15.725869][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.725872][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.725875][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   15.725878][    C2]  </IRQ>
[   15.725879][    C2]  <TASK>
[ 15.725881][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.725884][ C2] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 15.725888][ C2] 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
[   15.725891][    C2] RSP: 0018:ffffc90000147de8 EFLAGS: 00000242
[   15.725894][    C2] RAX: 000000000004455d RBX: 1ffff92000028fc1 RCX: ffffffffaed905d9
[   15.725896][    C2] RDX: 0000000000000000 RSI: ffffffffaf88f4e4 RDI: ffffffffaf053be0
[   15.725898][    C2] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1005ea66fa
[   15.725899][    C2] R10: ffff88802f5337d3 R11: ffffffffafa11288 R12: 0000000000000000
[   15.725901][    C2] R13: ffff888001bf2300 R14: dffffc0000000000 R15: 0000000000000000
[ 15.725905][ C2] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 15.725909][ C2] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 15.725912][ C2] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.725915][ C2] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.725920][ C2] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 15.725923][ C2] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60) 
[ 15.725928][ C2] do_idle (kernel/sched/idle.c:325) 
[ 15.725931][ C2] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.725934][ C2] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.725937][ C2] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 15.725942][ C2] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   15.742788][    C2] RCU nest depth: 0, expected: 0
| [   15.742974][    C2] INFO: lockdep is turned off.
| [   15.743157][    C2] Preemption disabled at:
| [ 15.743159][ C2] 0x0 
[   15.743614][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.743616][    C2] Call Trace:
[   15.743617][    C2]  <IRQ>
[ 15.743620][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.743628][ C2] __might_resched (kernel/sched/core.c:8796) 
[ 15.743637][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 15.743642][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 15.743645][ C2] ? simple_recursive_removal (fs/libfs.c:614) 
[ 15.743649][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 15.743654][ C2] ? 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) 
[ 15.743661][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 15.743663][ C2] ? 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) 
[ 15.743667][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 15.743672][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 15.743675][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 15.743681][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 15.743684][ C2] ? __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) 
[ 15.743689][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.743692][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 15.743695][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.743699][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 15.743704][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.743708][ C2] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 15.743711][ C2] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 15.743714][ C2] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.743717][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.743720][ C2] ? do_idle (kernel/sched/idle.c:325) 
[ 15.743722][ C2] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.743724][ C2] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.743728][ C2] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 15.743734][ C2] __put_net (net/core/net_namespace.c:732) 
[ 15.743738][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 15.743742][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.743745][ C2] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.743748][ C2] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 15.743753][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 15.743757][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 15.743761][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 15.743764][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.743769][ C2] rcu_core (kernel/rcu/tree.c:2834) 
[ 15.743773][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 15.743778][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.743781][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.743784][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   15.743788][    C2]  </IRQ>
[   15.743789][    C2]  <TASK>
[ 15.743790][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.743793][ C2] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 15.743797][ C2] 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
[   15.743799][    C2] RSP: 0018:ffffc90000147de8 EFLAGS: 00000242
[   15.743802][    C2] RAX: 000000000004455d RBX: 1ffff92000028fc1 RCX: ffffffffaed905d9
[   15.743804][    C2] RDX: 0000000000000000 RSI: ffffffffaf88f4e4 RDI: ffffffffaf053be0
[   15.743806][    C2] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1005ea66fa
[   15.743808][    C2] R10: ffff88802f5337d3 R11: ffffffffafa11288 R12: 0000000000000000
[   15.743809][    C2] R13: ffff888001bf2300 R14: dffffc0000000000 R15: 0000000000000000
[ 15.743813][ C2] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 15.743818][ C2] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 15.743820][ C2] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.743823][ C2] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.743826][ C2] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 15.743830][ C2] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60) 
[ 15.743834][ C2] do_idle (kernel/sched/idle.c:325) 
[ 15.743838][ C2] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.743841][ C2] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.743843][ C2] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 15.743848][ C2] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   17.977279][    C0] INFO: lockdep is turned off.
| [   17.977460][    C0] Preemption disabled at:
| [ 17.977462][ C0] handle_softirqs (kernel/softirq.c:553) 
| [   17.977798][    C0] Tainted: [W]=WARN
[   17.977799][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   17.977804][    C0] Call Trace:
[   17.977806][    C0]  <TASK>
[ 17.977808][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 17.977816][ C0] __might_resched (kernel/sched/core.c:8796) 
[ 17.977823][ C0] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 17.977828][ C0] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 17.977831][ C0] ? simple_recursive_removal (fs/libfs.c:614) 
[ 17.977836][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 17.977841][ 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) 
[ 17.977847][ C0] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 17.977849][ 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) 
[ 17.977853][ C0] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 17.977858][ C0] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 17.977861][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 17.977868][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 17.977871][ 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) 
[ 17.977877][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 17.977880][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 17.977883][ C0] ? smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 17.977888][ C0] ? kthread (kernel/kthread.c:464) 
[ 17.977891][ C0] ? ret_from_fork (arch/x86/kernel/process.c:148) 
[ 17.977895][ C0] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 17.977901][ C0] ? migrate_enable (./arch/x86/include/asm/preempt.h:104 ./include/linux/preempt.h:481 ./include/linux/preempt.h:481 kernel/sched/core.c:2427) 
[ 17.977907][ C0] ? __pfx_migrate_enable (kernel/sched/core.c:2402) 
[ 17.977910][ C0] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 17.977914][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 17.977919][ C0] __put_net (net/core/net_namespace.c:732) 
[ 17.977922][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 17.977926][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 17.977929][ C0] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 17.977934][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 17.977937][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 17.977940][ C0] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 17.977951][ C0] rcu_core (kernel/rcu/tree.c:2834) 
[ 17.977956][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 17.977960][ C0] ? __pfx_run_ksoftirqd (kernel/softirq.c:961) 
[ 17.977964][ C0] run_ksoftirqd (kernel/softirq.c:436 kernel/softirq.c:969 kernel/softirq.c:960) 
[ 17.977966][ C0] smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 17.977970][ C0] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[ 17.977974][ C0] kthread (kernel/kthread.c:464) 
[ 17.977977][ C0] ? __pfx_kthread (kernel/kthread.c:413) 
[ 17.977979][ C0] ? ret_from_fork (arch/x86/kernel/process.c:147) 
[ 17.977982][ C0] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 17.977986][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 17.977989][ C0] ? __pfx_kthread (kernel/kthread.c:413) 
[ 17.977992][ C0] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 17.977994][ C0] ? __pfx_kthread (kernel/kthread.c:413) 


Finger prints:
handle_softirqs:dump_stack_lvl:__might_resched:down_write:simple_recursive_removal
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