======================================
| [ 1264.419544][ C2] #1: ffffc90000577d40 ((work_completion)(&s->destroy_work)){+.+.}-{0:0}, at: process_one_work (kernel/workqueue.c:3214) 
| [ 1264.419963][ C2] #2: ffffffffa798b540 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2570) 
| [ 1264.420293][    C2]
| [ 1264.420293][    C2] stack backtrace:
[ 1264.420532][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 1264.420535][    C2] Workqueue: events destroy_super_work
[ 1264.420543][    C2] Call Trace:
[ 1264.420545][    C2]  <IRQ>
[ 1264.420547][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 1264.420555][ C2] print_usage_bug.part.0 (kernel/locking/lockdep.c:4048) 
[ 1264.420560][ C2] mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4059 kernel/locking/lockdep.c:4270) 
[ 1264.420563][ C2] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 1264.420567][ C2] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 1264.420570][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 1264.420575][ C2] ? save_trace (kernel/locking/lockdep.c:595) 
[ 1264.420581][ C2] mark_lock (kernel/locking/lockdep.c:4756) 
[ 1264.420584][ C2] mark_usage (kernel/locking/lockdep.c:4645) 
[ 1264.420587][ C2] __lock_acquire (kernel/locking/lockdep.c:5194) 
[ 1264.420591][ C2] lock_acquire.part.0 (kernel/locking/lockdep.c:473 kernel/locking/lockdep.c:5873) 
[ 1264.420594][ C2] ? simple_pin_fs (fs/libfs.c:1067) 
[ 1264.420598][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 1264.420601][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 1264.420604][ C2] ? simple_pin_fs (fs/libfs.c:1067) 
[ 1264.420608][ C2] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 1264.420610][ C2] ? simple_pin_fs (fs/libfs.c:1067) 
[ 1264.420613][ C2] simple_pin_fs (fs/libfs.c:1067) 
[ 1264.420616][ C2] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 1264.420620][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 1264.420626][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 1264.420629][ 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) 
[ 1264.420634][ C2] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2578) 
[ 1264.420638][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 1264.420641][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 1264.420643][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 1264.420648][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 1264.420652][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 1264.420655][ C2] ? delete_object_full (mm/kmemleak.c:837) 
[ 1264.420657][ C2] ? kfree (./include/linux/kmemleak.h:49 mm/slub.c:2305 mm/slub.c:4642 mm/slub.c:4841) 
[ 1264.420662][ C2] ? process_one_work (kernel/workqueue.c:3238) 
[ 1264.420665][ C2] ? worker_thread (kernel/workqueue.c:3315 kernel/workqueue.c:3402) 
[ 1264.420668][ C2] ? kthread (kernel/kthread.c:464) 
[ 1264.420674][ C2] ? ret_from_fork (arch/x86/kernel/process.c:148) 
[ 1264.420677][ C2] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 1264.420683][ C2] __put_net (net/core/net_namespace.c:732) 
[ 1264.420689][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 1264.420692][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 1264.420696][ C2] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2578) 
[ 1264.420702][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 1264.420706][ C2] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 1264.420709][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 1264.420714][ C2] rcu_core (kernel/rcu/tree.c:2834) 
[ 1264.420719][ C2] handle_softirqs (kernel/softirq.c:580) 
[ 1264.420724][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 1264.420727][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 1264.420730][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 1264.420733][    C2]  </IRQ>
[ 1264.420734][    C2]  <TASK>
[ 1264.420736][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 1264.420739][ C2] RIP: 0010:_raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 1264.420743][ C2] Code: 74 24 10 e8 81 4c 56 fd 48 89 ef e8 39 9f 56 fd 81 e3 00 02 00 00 75 29 9c 58 f6 c4 02 75 35 48 85 db 74 01 fb bf 01 00 00 00 <e8> ba 9c 4a fd 65 8b 05 f3 3c 1f 03 85 c0 74 0e 5b 5d e9 98 34 00
All code
========
   0:	74 24                	je     0x26
   2:	10 e8                	adc    %ch,%al
   4:	81 4c 56 fd 48 89 ef 	orl    $0xe8ef8948,-0x3(%rsi,%rdx,2)
   b:	e8 
   c:	39 9f 56 fd 81 e3    	cmp    %ebx,-0x1c7e02aa(%rdi)
  12:	00 02                	add    %al,(%rdx)
  14:	00 00                	add    %al,(%rax)
  16:	75 29                	jne    0x41
  18:	9c                   	pushf
  19:	58                   	pop    %rax
  1a:	f6 c4 02             	test   $0x2,%ah
  1d:	75 35                	jne    0x54
  1f:	48 85 db             	test   %rbx,%rbx
  22:	74 01                	je     0x25
  24:	fb                   	sti
  25:	bf 01 00 00 00       	mov    $0x1,%edi
  2a:*	e8 ba 9c 4a fd       	call   0xfffffffffd4a9ce9		<-- trapping instruction
  2f:	65 8b 05 f3 3c 1f 03 	mov    %gs:0x31f3cf3(%rip),%eax        # 0x31f3d29
  36:	85 c0                	test   %eax,%eax
  38:	74 0e                	je     0x48
  3a:	5b                   	pop    %rbx
  3b:	5d                   	pop    %rbp
  3c:	e9                   	.byte 0xe9
  3d:	98                   	cwtl
  3e:	34 00                	xor    $0x0,%al

Code starting with the faulting instruction
===========================================
   0:	e8 ba 9c 4a fd       	call   0xfffffffffd4a9cbf
   5:	65 8b 05 f3 3c 1f 03 	mov    %gs:0x31f3cf3(%rip),%eax        # 0x31f3cff
   c:	85 c0                	test   %eax,%eax
   e:	74 0e                	je     0x1e
  10:	5b                   	pop    %rbx
  11:	5d                   	pop    %rbp
  12:	e9                   	.byte 0xe9
  13:	98                   	cwtl
  14:	34 00                	xor    $0x0,%al
[ 1264.420746][    C2] RSP: 0018:ffffc90000577c08 EFLAGS: 00000206
[ 1264.420749][    C2] RAX: 0000000000000006 RBX: 0000000000000200 RCX: 0000000000000040
[ 1264.420751][    C2] RDX: 0000000000000000 RSI: ffffffffa6f15cea RDI: 0000000000000001
[ 1264.420752][    C2] RBP: ffffffffa7b9e4a0 R08: 0000000000000001 R09: 0000000000000001
[ 1264.420754][    C2] R10: ffffffffa847c7d7 R11: ffffffffa7b9e4b8 R12: 0000000000000000
[ 1264.420756][    C2] R13: 0000000000000246 R14: 0000000000000000 R15: ffff8880010433c0
[ 1264.420763][ C2] delete_object_full (mm/kmemleak.c:837) 
[ 1264.420766][ C2] kfree (./include/linux/kmemleak.h:49 mm/slub.c:2305 mm/slub.c:4642 mm/slub.c:4841) 
[ 1264.420770][ C2] ? process_one_work (kernel/workqueue.c:3238) 
[ 1264.420774][ C2] process_one_work (kernel/workqueue.c:3238) 
[ 1264.420781][ C2] ? __pfx_process_one_work (kernel/workqueue.c:3140) 
[ 1264.420787][ C2] ? assign_work (kernel/workqueue.c:1200) 
[ 1264.420792][ C2] worker_thread (kernel/workqueue.c:3315 kernel/workqueue.c:3402) 
[ 1264.420798][ C2] ? __pfx_worker_thread (kernel/workqueue.c:3348) 
[ 1264.420802][ C2] kthread (kernel/kthread.c:464) 
[ 1264.420805][ C2] ? __pfx_kthread (kernel/kthread.c:413) 
[ 1264.420808][ C2] ? ret_from_fork (arch/x86/kernel/process.c:147) 
[ 1264.420811][ C2] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 1264.420814][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 1264.420816][ C2] ? __pfx_kthread (kernel/kthread.c:413) 
[ 1264.420820][ C2] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 1264.420822][ C2] ? __pfx_kthread (kernel/kthread.c:413) 
[ 1264.420826][ C2] ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
| [ 1264.437979][    C2] RCU nest depth: 0, expected: 0
| [ 1264.438167][    C2] INFO: lockdep is turned off.
| [ 1264.438359][    C2] Preemption disabled at:
| [ 1264.438361][ C2] 0x0 
[ 1264.438691][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 1264.438693][    C2] Workqueue: events destroy_super_work
[ 1264.438701][    C2] Call Trace:
[ 1264.438703][    C2]  <IRQ>
[ 1264.438705][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 1264.438712][ C2] __might_resched (kernel/sched/core.c:8796) 
[ 1264.438721][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 1264.438725][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 1264.438728][ C2] ? simple_recursive_removal (fs/libfs.c:614) 
[ 1264.438732][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 1264.438737][ 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) 
[ 1264.438743][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 1264.438747][ 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) 
[ 1264.438750][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 1264.438756][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 1264.438759][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 1264.438764][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 1264.438767][ 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) 
[ 1264.438772][ C2] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2578) 
[ 1264.438777][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 1264.438780][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 1264.438785][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 1264.438789][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 1264.438794][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 1264.438799][ C2] ? delete_object_full (mm/kmemleak.c:837) 
[ 1264.438802][ C2] ? kfree (./include/linux/kmemleak.h:49 mm/slub.c:2305 mm/slub.c:4642 mm/slub.c:4841) 
[ 1264.438807][ C2] ? process_one_work (kernel/workqueue.c:3238) 
[ 1264.438813][ C2] ? worker_thread (kernel/workqueue.c:3315 kernel/workqueue.c:3402) 
[ 1264.438816][ C2] ? kthread (kernel/kthread.c:464) 
[ 1264.438820][ C2] ? ret_from_fork (arch/x86/kernel/process.c:148) 
[ 1264.438823][ C2] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 1264.438831][ C2] __put_net (net/core/net_namespace.c:732) 
[ 1264.438836][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 1264.438839][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 1264.438843][ C2] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2578) 
[ 1264.438848][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 1264.438853][ C2] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 1264.438857][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 1264.438861][ C2] rcu_core (kernel/rcu/tree.c:2834) 
[ 1264.438866][ C2] handle_softirqs (kernel/softirq.c:580) 
[ 1264.438872][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 1264.438874][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 1264.438877][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 1264.438881][    C2]  </IRQ>
[ 1264.438881][    C2]  <TASK>
[ 1264.438883][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 1264.438886][ C2] RIP: 0010:_raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 1264.438889][ C2] Code: 74 24 10 e8 81 4c 56 fd 48 89 ef e8 39 9f 56 fd 81 e3 00 02 00 00 75 29 9c 58 f6 c4 02 75 35 48 85 db 74 01 fb bf 01 00 00 00 <e8> ba 9c 4a fd 65 8b 05 f3 3c 1f 03 85 c0 74 0e 5b 5d e9 98 34 00
All code
========
   0:	74 24                	je     0x26
   2:	10 e8                	adc    %ch,%al
   4:	81 4c 56 fd 48 89 ef 	orl    $0xe8ef8948,-0x3(%rsi,%rdx,2)
   b:	e8 
   c:	39 9f 56 fd 81 e3    	cmp    %ebx,-0x1c7e02aa(%rdi)
  12:	00 02                	add    %al,(%rdx)
  14:	00 00                	add    %al,(%rax)
  16:	75 29                	jne    0x41
  18:	9c                   	pushf
  19:	58                   	pop    %rax
  1a:	f6 c4 02             	test   $0x2,%ah
  1d:	75 35                	jne    0x54
  1f:	48 85 db             	test   %rbx,%rbx
  22:	74 01                	je     0x25
  24:	fb                   	sti
  25:	bf 01 00 00 00       	mov    $0x1,%edi
  2a:*	e8 ba 9c 4a fd       	call   0xfffffffffd4a9ce9		<-- trapping instruction
  2f:	65 8b 05 f3 3c 1f 03 	mov    %gs:0x31f3cf3(%rip),%eax        # 0x31f3d29
  36:	85 c0                	test   %eax,%eax
  38:	74 0e                	je     0x48
  3a:	5b                   	pop    %rbx
  3b:	5d                   	pop    %rbp
  3c:	e9                   	.byte 0xe9
  3d:	98                   	cwtl
  3e:	34 00                	xor    $0x0,%al

Code starting with the faulting instruction
===========================================
   0:	e8 ba 9c 4a fd       	call   0xfffffffffd4a9cbf
   5:	65 8b 05 f3 3c 1f 03 	mov    %gs:0x31f3cf3(%rip),%eax        # 0x31f3cff
   c:	85 c0                	test   %eax,%eax
   e:	74 0e                	je     0x1e
  10:	5b                   	pop    %rbx
  11:	5d                   	pop    %rbp
  12:	e9                   	.byte 0xe9
  13:	98                   	cwtl
  14:	34 00                	xor    $0x0,%al
[ 1264.438892][    C2] RSP: 0018:ffffc90000577c08 EFLAGS: 00000206
[ 1264.438894][    C2] RAX: 0000000000000006 RBX: 0000000000000200 RCX: 0000000000000040
[ 1264.438896][    C2] RDX: 0000000000000000 RSI: ffffffffa6f15cea RDI: 0000000000000001
[ 1264.438898][    C2] RBP: ffffffffa7b9e4a0 R08: 0000000000000001 R09: 0000000000000001
[ 1264.438899][    C2] R10: ffffffffa847c7d7 R11: ffffffffa7b9e4b8 R12: 0000000000000000
[ 1264.438901][    C2] R13: 0000000000000246 R14: 0000000000000000 R15: ffff8880010433c0
[ 1264.438908][ C2] delete_object_full (mm/kmemleak.c:837) 
[ 1264.438911][ C2] kfree (./include/linux/kmemleak.h:49 mm/slub.c:2305 mm/slub.c:4642 mm/slub.c:4841) 
[ 1264.438915][ C2] ? process_one_work (kernel/workqueue.c:3238) 
[ 1264.438919][ C2] process_one_work (kernel/workqueue.c:3238) 
[ 1264.438926][ C2] ? __pfx_process_one_work (kernel/workqueue.c:3140) 
[ 1264.438932][ C2] ? assign_work (kernel/workqueue.c:1200) 
[ 1264.438937][ C2] worker_thread (kernel/workqueue.c:3315 kernel/workqueue.c:3402) 
[ 1264.438943][ C2] ? __pfx_worker_thread (kernel/workqueue.c:3348) 
[ 1264.438947][ C2] kthread (kernel/kthread.c:464) 
[ 1264.438951][ C2] ? __pfx_kthread (kernel/kthread.c:413) 
[ 1264.438954][ C2] ? ret_from_fork (arch/x86/kernel/process.c:147) 
[ 1264.438956][ C2] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 1264.438959][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 1264.438962][ C2] ? __pfx_kthread (kernel/kthread.c:413) 
[ 1264.438966][ C2] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 1264.438968][ C2] ? __pfx_kthread (kernel/kthread.c:413) 
[ 1264.438971][ C2] ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
| [ 1571.765438][    C1] INFO: lockdep is turned off.
| [ 1571.765624][    C1] Preemption disabled at:
| [ 1571.765626][ C1] handle_softirqs (kernel/softirq.c:553) 
| [ 1571.765989][    C1] Tainted: [W]=WARN
[ 1571.765990][    C1] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 1571.765993][    C1] Call Trace:
[ 1571.765994][    C1]  <TASK>
[ 1571.765997][ C1] dump_stack_lvl (lib/dump_stack.c:123) 
[ 1571.766008][ C1] __might_resched (kernel/sched/core.c:8796) 
[ 1571.766017][ C1] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 1571.766022][ C1] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 1571.766024][ C1] ? simple_recursive_removal (fs/libfs.c:614) 
[ 1571.766030][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 1571.766037][ 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) 
[ 1571.766043][ C1] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 1571.766046][ 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) 
[ 1571.766049][ C1] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 1571.766058][ C1] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 1571.766062][ C1] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 1571.766068][ C1] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 1571.766071][ C1] ? __pfx_skb_queue_purge_reason (net/core/skbuff.c:3933) 
[ 1571.766076][ 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) 
[ 1571.766081][ C1] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2578) 
[ 1571.766087][ C1] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 1571.766090][ C1] ? smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 1571.766095][ C1] ? kthread (kernel/kthread.c:464) 
[ 1571.766100][ C1] ? ret_from_fork (arch/x86/kernel/process.c:148) 
[ 1571.766105][ C1] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 1571.766111][ 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) 
[ 1571.766115][ C1] ? __pfx_migrate_enable (kernel/sched/core.c:2402) 
[ 1571.766118][ C1] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 1571.766123][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 1571.766127][ C1] __put_net (net/core/net_namespace.c:732) 
[ 1571.766130][ C1] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 1571.766134][ C1] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 1571.766137][ C1] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2578) 
[ 1571.766142][ C1] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 1571.766147][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 1571.766151][ C1] rcu_core (kernel/rcu/tree.c:2834) 
[ 1571.766155][ C1] handle_softirqs (kernel/softirq.c:580) 
[ 1571.766159][ C1] ? __pfx_run_ksoftirqd (kernel/softirq.c:961) 
[ 1571.766162][ C1] run_ksoftirqd (kernel/softirq.c:436 kernel/softirq.c:969 kernel/softirq.c:960) 
[ 1571.766165][ C1] smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 1571.766168][ C1] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[ 1571.766172][ C1] kthread (kernel/kthread.c:464) 
[ 1571.766175][ C1] ? __pfx_kthread (kernel/kthread.c:413) 
[ 1571.766178][ C1] ? ret_from_fork (arch/x86/kernel/process.c:147) 
[ 1571.766180][ C1] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 1571.766183][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 1571.766186][ C1] ? __pfx_kthread (kernel/kthread.c:413) 
[ 1571.766190][ C1] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 1571.766192][ 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
__might_resched:down_write:simple_recursive_removal:debugfs_remove:ref_tracker_dir_exit