======================================
| [ 12.715004][ C3] #3: ffffffff98c4b408 (rtnl_mutex){+.+.}-{4:4}, at: ops_undo_list (net/core/net_namespace.c:176 net/core/net_namespace.c:249) 
| [ 12.715399][ C3] #4: ffffffff983774c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2570) 
| [   12.715794][    C3]
| [   12.715794][    C3] stack backtrace:
[   12.716080][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   12.716083][    C3] Workqueue: netns cleanup_net
[   12.716087][    C3] Call Trace:
[   12.716089][    C3]  <IRQ>
[ 12.716091][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 12.716097][ C3] print_usage_bug.part.0 (kernel/locking/lockdep.c:4048) 
[ 12.716102][ C3] mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4059 kernel/locking/lockdep.c:4270) 
[ 12.716107][ C3] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 12.716111][ C3] ? save_trace (kernel/locking/lockdep.c:595) 
[ 12.716115][ C3] mark_lock (kernel/locking/lockdep.c:4756) 
[ 12.716119][ C3] mark_usage (kernel/locking/lockdep.c:4645) 
[ 12.716123][ C3] __lock_acquire (kernel/locking/lockdep.c:5194) 
[ 12.716126][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 12.716131][ C3] lock_acquire.part.0 (kernel/locking/lockdep.c:473 kernel/locking/lockdep.c:5873) 
[ 12.716134][ C3] ? simple_pin_fs (fs/libfs.c:1067) 
[ 12.716138][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 12.716143][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 12.716145][ C3] ? simple_pin_fs (fs/libfs.c:1067) 
[ 12.716149][ C3] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 12.716153][ C3] ? simple_pin_fs (fs/libfs.c:1067) 
[ 12.716155][ C3] simple_pin_fs (fs/libfs.c:1067) 
[ 12.716158][ C3] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 12.716162][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 12.716166][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 12.716169][ 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) 
[ 12.716174][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 12.716177][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 12.716179][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 12.716182][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 12.716187][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 12.716191][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 12.716194][ C3] ? try_to_wake_up (kernel/sched/core.c:4341) 
[ 12.716199][ C3] ? wake_up_q (./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/linux/sched/task.h:134 kernel/sched/core.c:1082) 
[ 12.716201][ C3] ? rwsem_wake.isra.0 (kernel/locking/rwsem.c:1201) 
[ 12.716205][ C3] ? __up_write (kernel/locking/rwsem.c:1374) 
[ 12.716208][ C3] ? kernfs_remove_by_name_ns (fs/kernfs/dir.c:1721) 
[ 12.716212][ C3] ? remove_files (fs/sysfs/group.c:27 (discriminator 3)) 
[ 12.716215][ C3] ? sysfs_remove_group (fs/sysfs/group.c:323) 
[ 12.716221][ C3] __put_net (net/core/net_namespace.c:732) 
[ 12.716223][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 12.716227][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 12.716230][ C3] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 12.716235][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 12.716239][ C3] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 12.716242][ C3] ? note_gp_changes (kernel/rcu/tree.c:1326 (discriminator 1)) 
[ 12.716245][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 12.716250][ C3] rcu_core (kernel/rcu/tree.c:2834) 
[ 12.716254][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 12.716260][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 12.716263][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 12.716266][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   12.716270][    C3]  </IRQ>
[   12.716271][    C3]  <TASK>
[ 12.716273][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 12.716275][ C3] RIP: 0010:_raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 12.716279][ C3] Code: 74 24 10 e8 c1 fe 81 fd 48 89 ef e8 79 51 82 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> fa 4e 76 fd 65 8b 05 13 bd 96 02 85 c0 74 0e 5b 5d c3 cc cc cc
All code
========
   0:	74 24                	je     0x26
   2:	10 e8                	adc    %ch,%al
   4:	c1 fe 81             	sar    $0x81,%esi
   7:	fd                   	std
   8:	48 89 ef             	mov    %rbp,%rdi
   b:	e8 79 51 82 fd       	call   0xfffffffffd825189
  10:	81 e3 00 02 00 00    	and    $0x200,%ebx
  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 fa 4e 76 fd       	call   0xfffffffffd764f29		<-- trapping instruction
  2f:	65 8b 05 13 bd 96 02 	mov    %gs:0x296bd13(%rip),%eax        # 0x296bd49
  36:	85 c0                	test   %eax,%eax
  38:	74 0e                	je     0x48
  3a:	5b                   	pop    %rbx
  3b:	5d                   	pop    %rbp
  3c:	c3                   	ret
  3d:	cc                   	int3
  3e:	cc                   	int3
  3f:	cc                   	int3

Code starting with the faulting instruction
===========================================
   0:	e8 fa 4e 76 fd       	call   0xfffffffffd764eff
   5:	65 8b 05 13 bd 96 02 	mov    %gs:0x296bd13(%rip),%eax        # 0x296bd1f
   c:	85 c0                	test   %eax,%eax
   e:	74 0e                	je     0x1e
  10:	5b                   	pop    %rbx
  11:	5d                   	pop    %rbp
  12:	c3                   	ret
  13:	cc                   	int3
  14:	cc                   	int3
  15:	cc                   	int3
[   12.716282][    C3] RSP: 0018:ffffc90000477598 EFLAGS: 00000206
[   12.716285][    C3] RAX: 0000000000000002 RBX: 0000000000000200 RCX: 0000000000000040
[   12.716287][    C3] RDX: 0000000000000000 RSI: ffffffff97e9175c RDI: 0000000000000001
[   12.716288][    C3] RBP: ffff888002744f28 R08: 0000000000000001 R09: 0000000000000001
[   12.716290][    C3] R10: ffffffff98de7cd7 R11: ffffffff983775e0 R12: ffff88809c2f0000
[   12.716292][    C3] R13: ffff8880027445d4 R14: ffff888002744f28 R15: 0000000000000000
[ 12.716298][ C3] try_to_wake_up (kernel/sched/core.c:4341) 
[ 12.716302][ C3] ? __pfx_try_to_wake_up (kernel/sched/core.c:4185) 
[ 12.716305][ C3] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 12.716310][ C3] wake_up_q (./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/linux/sched/task.h:134 kernel/sched/core.c:1082) 
[ 12.716313][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 12.716317][ C3] rwsem_wake.isra.0 (kernel/locking/rwsem.c:1201) 
[ 12.716321][ C3] ? __pfx_rwsem_wake.isra.0 (kernel/locking/rwsem.c:1201) 
[ 12.716325][ C3] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 12.716329][ C3] __up_write (kernel/locking/rwsem.c:1374) 
[ 12.716332][ C3] ? kernfs_remove_by_name_ns (fs/kernfs/dir.c:1721) 
[ 12.716336][ C3] kernfs_remove_by_name_ns (fs/kernfs/dir.c:1721) 
[ 12.716340][ C3] remove_files (fs/sysfs/group.c:27 (discriminator 3)) 
[ 12.716343][ C3] sysfs_remove_group (fs/sysfs/group.c:323) 
[ 12.716346][ C3] sysfs_remove_groups (fs/sysfs/group.c:345 fs/sysfs/group.c:338) 
[ 12.716350][ C3] device_remove_attrs (drivers/base/core.c:2964) 
[ 12.716355][ C3] ? __pfx_device_remove_attrs (drivers/base/core.c:2964) 
[ 12.716358][ C3] ? __up_write (./arch/x86/include/asm/preempt.h:104 kernel/locking/rwsem.c:1375) 
[ 12.716361][ C3] ? kernfs_remove_by_name_ns (fs/kernfs/dir.c:1721) 
[ 12.716366][ C3] device_del (drivers/base/core.c:3881) 
[ 12.716369][ C3] ? __pfx_device_del (drivers/base/core.c:3836) 
[ 12.716373][ C3] ? netdev_unregister_kobject (net/core/net-sysfs.c:2308) 
[ 12.716377][ C3] unregister_netdevice_many_notify (net/core/dev.c:2767 (discriminator 3) net/core/dev.c:12115 (discriminator 3)) 
[ 12.716384][ C3] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:12004) 
[ 12.716388][ C3] ? rtnl_is_locked (net/core/rtnetlink.c:169) 
[ 12.716390][ C3] ? unregister_netdevice_queue (net/core/dev.c:11976) 
[ 12.716394][ C3] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11975) 
[ 12.716400][ C3] ? lockdep_rtnl_is_held (net/core/rtnetlink.c:182) 
[ 12.716402][ C3] ? sit_exit_rtnl_net (net/ipv6/sit.c:1822 (discriminator 1)) 
[ 12.716408][ C3] ops_undo_list (net/core/net_namespace.c:190 net/core/net_namespace.c:249) 
[ 12.716413][ C3] ? __pfx_ops_undo_list (net/core/net_namespace.c:224) 
[ 12.716416][ C3] ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 kernel/softirq.c:412) 
[ 12.716421][ C3] cleanup_net (net/core/net_namespace.c:688) 
[ 12.716425][ C3] ? __pfx_cleanup_net (net/core/net_namespace.c:652) 
[ 12.716429][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 12.716433][ C3] process_one_work (kernel/workqueue.c:3238) 
[ 12.716439][ C3] ? __pfx_process_one_work (kernel/workqueue.c:3140) 
[ 12.716444][ C3] ? assign_work (kernel/workqueue.c:1200) 
[ 12.716449][ C3] worker_thread (kernel/workqueue.c:3315 kernel/workqueue.c:3402) 
[ 12.716454][ C3] ? __pfx_worker_thread (kernel/workqueue.c:3348) 
[ 12.716457][ C3] kthread (kernel/kthread.c:464) 
[ 12.716461][ C3] ? __pfx_kthread (kernel/kthread.c:413) 
[ 12.716464][ C3] ? ret_from_fork (arch/x86/kernel/process.c:147) 
[ 12.716467][ C3] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 12.716471][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 12.716474][ C3] ? __pfx_kthread (kernel/kthread.c:413) 
[ 12.716477][ C3] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 12.716480][ C3] ? __pfx_kthread (kernel/kthread.c:413) 
[ 12.716483][ C3] ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
| [   12.743778][    C3] RCU nest depth: 0, expected: 0
| [   12.743989][    C3] INFO: lockdep is turned off.
| [   12.744215][    C3] Preemption disabled at:
| [ 12.744216][ C3] __up_write (kernel/locking/rwsem.c:148 (discriminator 26) kernel/locking/rwsem.c:1371 (discriminator 26)) 
[   12.744650][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   12.744652][    C3] Workqueue: netns cleanup_net
[   12.744657][    C3] Call Trace:
[   12.744659][    C3]  <IRQ>
[ 12.744661][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 12.744668][ C3] __might_resched (kernel/sched/core.c:8796) 
[ 12.744675][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 12.744679][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 12.744682][ C3] ? simple_recursive_removal (fs/libfs.c:614) 
[ 12.744686][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 12.744691][ 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) 
[ 12.744695][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 12.744699][ 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) 
[ 12.744701][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 12.744707][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 12.744711][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 12.744715][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 12.744718][ 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) 
[ 12.744722][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 12.744726][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 12.744728][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 12.744733][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 12.744738][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 12.744742][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 12.744746][ C3] ? try_to_wake_up (kernel/sched/core.c:4341) 
[ 12.744749][ C3] ? wake_up_q (./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/linux/sched/task.h:134 kernel/sched/core.c:1082) 
[ 12.744752][ C3] ? rwsem_wake.isra.0 (kernel/locking/rwsem.c:1201) 
[ 12.744755][ C3] ? __up_write (kernel/locking/rwsem.c:1374) 
[ 12.744758][ C3] ? kernfs_remove_by_name_ns (fs/kernfs/dir.c:1721) 
[ 12.744762][ C3] ? remove_files (fs/sysfs/group.c:27 (discriminator 3)) 
[ 12.744765][ C3] ? sysfs_remove_group (fs/sysfs/group.c:323) 
[ 12.744770][ C3] __put_net (net/core/net_namespace.c:732) 
[ 12.744773][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 12.744777][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 12.744780][ C3] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 12.744784][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 12.744788][ C3] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 12.744792][ C3] ? note_gp_changes (kernel/rcu/tree.c:1326 (discriminator 1)) 
[ 12.744795][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 12.744800][ C3] rcu_core (kernel/rcu/tree.c:2834) 
[ 12.744805][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 12.744810][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 12.744814][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 12.744817][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   12.744821][    C3]  </IRQ>
[   12.744822][    C3]  <TASK>
[ 12.744823][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 12.744826][ C3] RIP: 0010:_raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 12.744830][ C3] Code: 74 24 10 e8 c1 fe 81 fd 48 89 ef e8 79 51 82 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> fa 4e 76 fd 65 8b 05 13 bd 96 02 85 c0 74 0e 5b 5d c3 cc cc cc
All code
========
   0:	74 24                	je     0x26
   2:	10 e8                	adc    %ch,%al
   4:	c1 fe 81             	sar    $0x81,%esi
   7:	fd                   	std
   8:	48 89 ef             	mov    %rbp,%rdi
   b:	e8 79 51 82 fd       	call   0xfffffffffd825189
  10:	81 e3 00 02 00 00    	and    $0x200,%ebx
  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 fa 4e 76 fd       	call   0xfffffffffd764f29		<-- trapping instruction
  2f:	65 8b 05 13 bd 96 02 	mov    %gs:0x296bd13(%rip),%eax        # 0x296bd49
  36:	85 c0                	test   %eax,%eax
  38:	74 0e                	je     0x48
  3a:	5b                   	pop    %rbx
  3b:	5d                   	pop    %rbp
  3c:	c3                   	ret
  3d:	cc                   	int3
  3e:	cc                   	int3
  3f:	cc                   	int3

Code starting with the faulting instruction
===========================================
   0:	e8 fa 4e 76 fd       	call   0xfffffffffd764eff
   5:	65 8b 05 13 bd 96 02 	mov    %gs:0x296bd13(%rip),%eax        # 0x296bd1f
   c:	85 c0                	test   %eax,%eax
   e:	74 0e                	je     0x1e
  10:	5b                   	pop    %rbx
  11:	5d                   	pop    %rbp
  12:	c3                   	ret
  13:	cc                   	int3
  14:	cc                   	int3
  15:	cc                   	int3
[   12.744832][    C3] RSP: 0018:ffffc90000477598 EFLAGS: 00000206
[   12.744835][    C3] RAX: 0000000000000002 RBX: 0000000000000200 RCX: 0000000000000040
[   12.744837][    C3] RDX: 0000000000000000 RSI: ffffffff97e9175c RDI: 0000000000000001
[   12.744838][    C3] RBP: ffff888002744f28 R08: 0000000000000001 R09: 0000000000000001
[   12.744840][    C3] R10: ffffffff98de7cd7 R11: ffffffff983775e0 R12: ffff88809c2f0000
[   12.744842][    C3] R13: ffff8880027445d4 R14: ffff888002744f28 R15: 0000000000000000
[ 12.744848][ C3] try_to_wake_up (kernel/sched/core.c:4341) 
[ 12.744852][ C3] ? __pfx_try_to_wake_up (kernel/sched/core.c:4185) 
[ 12.744855][ C3] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 12.744860][ C3] wake_up_q (./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/linux/sched/task.h:134 kernel/sched/core.c:1082) 
[ 12.744863][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 12.744867][ C3] rwsem_wake.isra.0 (kernel/locking/rwsem.c:1201) 
[ 12.744870][ C3] ? __pfx_rwsem_wake.isra.0 (kernel/locking/rwsem.c:1201) 
[ 12.744874][ C3] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 12.744878][ C3] __up_write (kernel/locking/rwsem.c:1374) 
[ 12.744881][ C3] ? kernfs_remove_by_name_ns (fs/kernfs/dir.c:1721) 
[ 12.744885][ C3] kernfs_remove_by_name_ns (fs/kernfs/dir.c:1721) 
[ 12.744889][ C3] remove_files (fs/sysfs/group.c:27 (discriminator 3)) 
[ 12.744892][ C3] sysfs_remove_group (fs/sysfs/group.c:323) 
[ 12.744896][ C3] sysfs_remove_groups (fs/sysfs/group.c:345 fs/sysfs/group.c:338) 
[ 12.744899][ C3] device_remove_attrs (drivers/base/core.c:2964) 
[ 12.744904][ C3] ? __pfx_device_remove_attrs (drivers/base/core.c:2964) 
[ 12.744907][ C3] ? __up_write (./arch/x86/include/asm/preempt.h:104 kernel/locking/rwsem.c:1375) 
[ 12.744910][ C3] ? kernfs_remove_by_name_ns (fs/kernfs/dir.c:1721) 
[ 12.744915][ C3] device_del (drivers/base/core.c:3881) 
[ 12.744919][ C3] ? __pfx_device_del (drivers/base/core.c:3836) 
[ 12.744922][ C3] ? netdev_unregister_kobject (net/core/net-sysfs.c:2308) 
[ 12.744927][ C3] unregister_netdevice_many_notify (net/core/dev.c:2767 (discriminator 3) net/core/dev.c:12115 (discriminator 3)) 
[ 12.744934][ C3] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:12004) 
[ 12.744937][ C3] ? rtnl_is_locked (net/core/rtnetlink.c:169) 
[ 12.744940][ C3] ? unregister_netdevice_queue (net/core/dev.c:11976) 
[ 12.744944][ C3] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11975) 
[ 12.744950][ C3] ? lockdep_rtnl_is_held (net/core/rtnetlink.c:182) 
[ 12.744952][ C3] ? sit_exit_rtnl_net (net/ipv6/sit.c:1822 (discriminator 1)) 
[ 12.744958][ C3] ops_undo_list (net/core/net_namespace.c:190 net/core/net_namespace.c:249) 
[ 12.744962][ C3] ? __pfx_ops_undo_list (net/core/net_namespace.c:224) 
[ 12.744966][ C3] ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 kernel/softirq.c:412) 
[ 12.744971][ C3] cleanup_net (net/core/net_namespace.c:688) 
[ 12.744975][ C3] ? __pfx_cleanup_net (net/core/net_namespace.c:652) 
[ 12.744979][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 12.744983][ C3] process_one_work (kernel/workqueue.c:3238) 
[ 12.744990][ C3] ? __pfx_process_one_work (kernel/workqueue.c:3140) 
[ 12.744996][ C3] ? assign_work (kernel/workqueue.c:1200) 
[ 12.745000][ C3] worker_thread (kernel/workqueue.c:3315 kernel/workqueue.c:3402) 
[ 12.745005][ C3] ? __pfx_worker_thread (kernel/workqueue.c:3348) 
[ 12.745009][ C3] kthread (kernel/kthread.c:464) 
[ 12.745012][ C3] ? __pfx_kthread (kernel/kthread.c:413) 
[ 12.745015][ C3] ? ret_from_fork (arch/x86/kernel/process.c:147) 
[ 12.745019][ C3] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 12.745022][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 12.745026][ C3] ? __pfx_kthread (kernel/kthread.c:413) 
[ 12.745029][ C3] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 12.745032][ C3] ? __pfx_kthread (kernel/kthread.c:413) 


Finger prints:
__up_write:dump_stack_lvl:__might_resched:down_write:simple_recursive_removal
mark_lock_irq:mark_lock:mark_usage:__lock_acquire:_raw_spin_lock