======================================
| [   21.904173][    C3] 1 lock held by swapper/3/0:
| [ 21.904377][ C3] #0: ffffffffaf7774c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2570) 
| [   21.904729][    C3]
| [   21.904729][    C3] stack backtrace:
[   21.904986][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   21.904989][    C3] Call Trace:
[   21.904991][    C3]  <IRQ>
[ 21.904994][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 21.905002][ C3] print_usage_bug.part.0 (kernel/locking/lockdep.c:4048) 
[ 21.905008][ C3] mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4059 kernel/locking/lockdep.c:4270) 
[ 21.905013][ C3] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 21.905019][ C3] ? save_trace (kernel/locking/lockdep.c:595) 
[ 21.905025][ C3] mark_lock (kernel/locking/lockdep.c:4756) 
[ 21.905029][ C3] mark_usage (kernel/locking/lockdep.c:4645) 
[ 21.905032][ C3] __lock_acquire (kernel/locking/lockdep.c:5194) 
[ 21.905036][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 21.905040][ C3] lock_acquire.part.0 (kernel/locking/lockdep.c:473 kernel/locking/lockdep.c:5873) 
[ 21.905043][ C3] ? simple_pin_fs (fs/libfs.c:1067) 
[ 21.905048][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.905053][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 21.905056][ C3] ? simple_pin_fs (fs/libfs.c:1067) 
[ 21.905061][ C3] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 21.905065][ C3] ? simple_pin_fs (fs/libfs.c:1067) 
[ 21.905068][ C3] simple_pin_fs (fs/libfs.c:1067) 
[ 21.905072][ C3] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 21.905076][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 21.905084][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 21.905087][ 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) 
[ 21.905095][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 21.905098][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 21.905101][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 21.905105][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 21.905111][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 21.905115][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 21.905119][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 21.905122][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 21.905124][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 21.905129][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 21.905131][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 21.905134][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 21.905139][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 21.905146][ C3] __put_net (net/core/net_namespace.c:732) 
[ 21.905150][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 21.905154][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 21.905156][ C3] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 21.905160][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 21.905163][ C3] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 21.905167][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.905170][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 21.905174][ C3] rcu_core (kernel/rcu/tree.c:2834) 
[ 21.905179][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 21.905184][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 21.905187][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 21.905189][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   21.905193][    C3]  </IRQ>
[   21.905194][    C3]  <TASK>
[ 21.905196][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 21.905198][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 21.905203][ C3] 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
[   21.905206][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000242
[   21.905209][    C3] RAX: 0000000000049c61 RBX: 1ffff9200002afc1 RCX: ffffffffae7905d9
[   21.905211][    C3] RDX: 0000000000000000 RSI: ffffffffaf28f4e4 RDI: ffffffffaea53be0
[   21.905213][    C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c366fa
[   21.905215][    C3] R10: ffff8880361b37d3 R11: ffffffffaf411288 R12: 0000000000000000
[   21.905217][    C3] R13: ffff888001bf45c0 R14: dffffc0000000000 R15: 0000000000000000
[ 21.905221][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 21.905226][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 21.905229][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 21.905231][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 21.905235][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 21.905239][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60) 
[ 21.905243][ C3] do_idle (kernel/sched/idle.c:325) 
[ 21.905247][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 21.905250][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 21.905252][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 21.905257][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   21.921410][    C3] RCU nest depth: 0, expected: 0
| [   21.921584][    C3] INFO: lockdep is turned off.
| [   21.921765][    C3] Preemption disabled at:
| [ 21.921767][ C3] 0x0 
[   21.922101][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   21.922103][    C3] Call Trace:
[   21.922105][    C3]  <IRQ>
[ 21.922108][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 21.922119][ C3] __might_resched (kernel/sched/core.c:8796) 
[ 21.922127][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 21.922132][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 21.922135][ C3] ? simple_recursive_removal (fs/libfs.c:614) 
[ 21.922140][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.922145][ 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) 
[ 21.922152][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 21.922155][ 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) 
[ 21.922158][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 21.922164][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 21.922166][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 21.922174][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 21.922177][ 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) 
[ 21.922184][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 21.922187][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 21.922191][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 21.922197][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 21.922202][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 21.922207][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 21.922210][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 21.922213][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 21.922216][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 21.922219][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 21.922222][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 21.922224][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 21.922229][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 21.922236][ C3] __put_net (net/core/net_namespace.c:732) 
[ 21.922241][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 21.922245][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 21.922248][ C3] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 21.922253][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 21.922256][ C3] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 21.922259][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.922262][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 21.922268][ C3] rcu_core (kernel/rcu/tree.c:2834) 
[ 21.922274][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 21.922279][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 21.922282][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 21.922285][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   21.922289][    C3]  </IRQ>
[   21.922290][    C3]  <TASK>
[ 21.922291][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 21.922294][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 21.922298][ C3] 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
[   21.922302][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000242
[   21.922305][    C3] RAX: 0000000000049c61 RBX: 1ffff9200002afc1 RCX: ffffffffae7905d9
[   21.922307][    C3] RDX: 0000000000000000 RSI: ffffffffaf28f4e4 RDI: ffffffffaea53be0
[   21.922309][    C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c366fa
[   21.922310][    C3] R10: ffff8880361b37d3 R11: ffffffffaf411288 R12: 0000000000000000
[   21.922312][    C3] R13: ffff888001bf45c0 R14: dffffc0000000000 R15: 0000000000000000
[ 21.922316][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 21.922321][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 21.922323][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 21.922326][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 21.922329][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 21.922333][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60) 
[ 21.922337][ C3] do_idle (kernel/sched/idle.c:325) 
[ 21.922341][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 21.922344][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 21.922347][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 21.922351][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   28.331159][    C0] INFO: lockdep is turned off.
| [   28.331318][    C0] Preemption disabled at:
| [ 28.331320][ C0] handle_softirqs (kernel/softirq.c:553) 
| [   28.331666][    C0] Tainted: [W]=WARN
[   28.331668][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   28.331670][    C0] Call Trace:
[   28.331672][    C0]  <TASK>
[ 28.331674][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 28.331684][ C0] __might_resched (kernel/sched/core.c:8796) 
[ 28.331692][ C0] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 28.331697][ C0] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 28.331701][ C0] ? simple_recursive_removal (fs/libfs.c:614) 
[ 28.331706][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 28.331712][ 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) 
[ 28.331720][ C0] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 28.331723][ 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) 
[ 28.331726][ C0] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 28.331733][ C0] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 28.331737][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 28.331744][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 28.331747][ 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) 
[ 28.331755][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 28.331759][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 28.331762][ C0] ? smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 28.331767][ C0] ? kthread (kernel/kthread.c:464) 
[ 28.331770][ C0] ? ret_from_fork (arch/x86/kernel/process.c:148) 
[ 28.331776][ C0] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 28.331783][ 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) 
[ 28.331787][ C0] ? __pfx_migrate_enable (kernel/sched/core.c:2402) 
[ 28.331791][ C0] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 28.331796][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 28.331801][ C0] __put_net (net/core/net_namespace.c:732) 
[ 28.331807][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 28.331812][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 28.331814][ C0] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 28.331819][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 28.331822][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 28.331825][ C0] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 28.331834][ C0] rcu_core (kernel/rcu/tree.c:2834) 
[ 28.331839][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 28.331844][ C0] ? __pfx_run_ksoftirqd (kernel/softirq.c:961) 
[ 28.331848][ C0] run_ksoftirqd (kernel/softirq.c:436 kernel/softirq.c:969 kernel/softirq.c:960) 
[ 28.331850][ C0] smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 28.331854][ C0] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[ 28.331859][ C0] kthread (kernel/kthread.c:464) 
[ 28.331861][ C0] ? __pfx_kthread (kernel/kthread.c:413) 
[ 28.331863][ C0] ? ret_from_fork (arch/x86/kernel/process.c:147) 
[ 28.331866][ C0] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 28.331869][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 28.331872][ C0] ? __pfx_kthread (kernel/kthread.c:413) 
[ 28.331876][ C0] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 28.331878][ 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