======================================
| [ 12.581524][ C2] #4: ffffffff9d61e2a8 (gdp_mutex){+.+.}-{4:4}, at: cleanup_glue_dir (./include/linux/instrumented.h:68 ./include/linux/atomic/atomic-instrumented.h:32 ./include/linux/refcount.h:170 ./include/linux/kref.h:36 drivers/base/core.c:3415 drivers/base/core.c:3358) 
| [ 12.581873][ C2] #5: ffffffff9cf74480 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) 
| [   12.582232][    C2]
| [   12.582232][    C2] stack backtrace:
[   12.582487][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   12.582491][    C2] Workqueue: netns cleanup_net
[   12.582495][    C2] Call Trace:
[   12.582498][    C2]  <IRQ>
[ 12.582500][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 12.582508][ C2] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) 
[ 12.582512][ C2] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) 
[ 12.582516][ C2] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 12.582521][ C2] ? save_trace (kernel/locking/lockdep.c:594) 
[ 12.582527][ C2] mark_lock (kernel/locking/lockdep.c:4754) 
[ 12.582530][ C2] mark_usage (kernel/locking/lockdep.c:4643) 
[ 12.582533][ C2] __lock_acquire (kernel/locking/lockdep.c:5189) 
[ 12.582538][ C2] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 12.582540][ C2] ? simple_pin_fs (fs/libfs.c:1066) 
[ 12.582545][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 12.582548][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 12.582551][ C2] ? simple_pin_fs (fs/libfs.c:1066) 
[ 12.582554][ C2] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 12.582558][ C2] ? simple_pin_fs (fs/libfs.c:1066) 
[ 12.582560][ C2] simple_pin_fs (fs/libfs.c:1066) 
[ 12.582563][ C2] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 12.582568][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 12.582575][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 12.582578][ 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:2333) 
[ 12.582585][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 12.582588][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 12.582592][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 12.582595][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 12.582599][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 12.582603][ C2] ? lock_acquire.part.0 (kernel/locking/lockdep.c:5870) 
[ 12.582605][ C2] ? __mutex_lock (kernel/locking/mutex.c:603 kernel/locking/mutex.c:746) 
[ 12.582610][ C2] ? cleanup_glue_dir (./include/linux/instrumented.h:68 ./include/linux/atomic/atomic-instrumented.h:32 ./include/linux/refcount.h:170 ./include/linux/kref.h:36 drivers/base/core.c:3415 drivers/base/core.c:3358) 
[ 12.582613][ C2] ? device_del (./include/linux/sched/mm.h:339 ./include/linux/sched/mm.h:369 drivers/base/core.c:3903) 
[ 12.582617][ C2] ? unregister_netdevice_many_notify (net/core/dev.c:2765 (discriminator 3) net/core/dev.c:12098 (discriminator 3)) 
[ 12.582621][ C2] ? ops_undo_list (net/core/net_namespace.c:190 net/core/net_namespace.c:249) 
[ 12.582623][ C2] ? cleanup_net (net/core/net_namespace.c:688) 
[ 12.582626][ C2] ? process_one_work (kernel/workqueue.c:3238) 
[ 12.582632][ C2] __put_net (net/core/net_namespace.c:732) 
[ 12.582634][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 12.582638][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 12.582641][ C2] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 12.582645][ C2] ? sched_balance_domains (kernel/sched/fair.c:12263) 
[ 12.582651][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 12.582655][ C2] ? mark_held_locks (kernel/locking/lockdep.c:4326) 
[ 12.582658][ C2] ? note_gp_changes (kernel/rcu/tree.c:1324 (discriminator 1)) 
[ 12.582661][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 12.582666][ C2] rcu_core (kernel/rcu/tree.c:2826) 
[ 12.582670][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 12.582675][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 12.582678][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 12.582680][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   12.582684][    C2]  </IRQ>
[   12.582685][    C2]  <TASK>
[ 12.582687][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 12.582689][ C2] RIP: 0010:lock_acquire.part.0 (kernel/locking/lockdep.c:5870) 
[ 12.582693][ C2] Code: ff ff ff 65 0f c1 05 9d 53 13 05 83 f8 01 0f 85 3e 01 00 00 9c 58 f6 c4 02 0f 85 29 01 00 00 48 85 db 74 01 fb 48 8b 44 24 30 <65> 48 2b 05 0e 17 13 05 0f 85 3a 01 00 00 48 83 c4 38 5b 5d 41 5c
All code
========
   0:	ff                   	(bad)
   1:	ff                   	(bad)
   2:	ff 65 0f             	jmp    *0xf(%rbp)
   5:	c1 05 9d 53 13 05 83 	roll   $0x83,0x513539d(%rip)        # 0x51353a9
   c:	f8                   	clc
   d:	01 0f                	add    %ecx,(%rdi)
   f:	85 3e                	test   %edi,(%rsi)
  11:	01 00                	add    %eax,(%rax)
  13:	00 9c 58 f6 c4 02 0f 	add    %bl,0xf02c4f6(%rax,%rbx,2)
  1a:	85 29                	test   %ebp,(%rcx)
  1c:	01 00                	add    %eax,(%rax)
  1e:	00 48 85             	add    %cl,-0x7b(%rax)
  21:	db 74 01 fb          	(bad)  -0x5(%rcx,%rax,1)
  25:	48 8b 44 24 30       	mov    0x30(%rsp),%rax
  2a:*	65 48 2b 05 0e 17 13 	sub    %gs:0x513170e(%rip),%rax        # 0x5131740		<-- trapping instruction
  31:	05 
  32:	0f 85 3a 01 00 00    	jne    0x172
  38:	48 83 c4 38          	add    $0x38,%rsp
  3c:	5b                   	pop    %rbx
  3d:	5d                   	pop    %rbp
  3e:	41 5c                	pop    %r12

Code starting with the faulting instruction
===========================================
   0:	65 48 2b 05 0e 17 13 	sub    %gs:0x513170e(%rip),%rax        # 0x5131716
   7:	05 
   8:	0f 85 3a 01 00 00    	jne    0x148
   e:	48 83 c4 38          	add    $0x38,%rsp
  12:	5b                   	pop    %rbx
  13:	5d                   	pop    %rbp
  14:	41 5c                	pop    %r12
[   12.582695][    C2] RSP: 0018:ffffc900004876b8 EFLAGS: 00000206
[   12.582699][    C2] RAX: 24d476ff7c811600 RBX: 0000000000000200 RCX: 0000000000000001
[   12.582701][    C2] RDX: 0000000000000000 RSI: ffffffff9ca7168b RDI: ffffffff9c250e20
[   12.582703][    C2] RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000001
[   12.582704][    C2] R10: ffffc90000487588 R11: ffffffff9d61e2a8 R12: 0000000000000000
[   12.582706][    C2] R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff9d61e2a8
[ 12.582712][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 12.582714][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 12.582716][ C2] ? cleanup_glue_dir (./include/linux/instrumented.h:68 ./include/linux/atomic/atomic-instrumented.h:32 ./include/linux/refcount.h:170 ./include/linux/kref.h:36 drivers/base/core.c:3415 drivers/base/core.c:3358) 
[ 12.582721][ C2] __mutex_lock (kernel/locking/mutex.c:603 kernel/locking/mutex.c:746) 
[ 12.582724][ C2] ? cleanup_glue_dir (./include/linux/instrumented.h:68 ./include/linux/atomic/atomic-instrumented.h:32 ./include/linux/refcount.h:170 ./include/linux/kref.h:36 drivers/base/core.c:3415 drivers/base/core.c:3358) 
[ 12.582727][ C2] ? __lock_acquire (kernel/locking/lockdep.c:5235) 
[ 12.582730][ C2] ? cleanup_glue_dir (./include/linux/instrumented.h:68 ./include/linux/atomic/atomic-instrumented.h:32 ./include/linux/refcount.h:170 ./include/linux/kref.h:36 drivers/base/core.c:3415 drivers/base/core.c:3358) 
[ 12.582733][ C2] ? __pfx___mutex_lock (kernel/locking/mutex.c:745) 
[ 12.582738][ C2] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 12.582742][ C2] ? class_to_subsys (drivers/base/class.c:67) 
[ 12.582745][ C2] ? __lock_release (kernel/locking/lockdep.c:5534) 
[ 12.582749][ 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) 
[ 12.582753][ C2] ? cleanup_glue_dir (./include/linux/instrumented.h:68 ./include/linux/atomic/atomic-instrumented.h:32 ./include/linux/refcount.h:170 ./include/linux/kref.h:36 drivers/base/core.c:3415 drivers/base/core.c:3358) 
[ 12.582756][ C2] cleanup_glue_dir (./include/linux/instrumented.h:68 ./include/linux/atomic/atomic-instrumented.h:32 ./include/linux/refcount.h:170 ./include/linux/kref.h:36 drivers/base/core.c:3415 drivers/base/core.c:3358) 
[ 12.582760][ C2] device_del (./include/linux/sched/mm.h:339 ./include/linux/sched/mm.h:369 drivers/base/core.c:3903) 
[ 12.582764][ C2] ? __pfx_device_del (drivers/base/core.c:3836) 
[ 12.582769][ C2] ? netdev_unregister_kobject (net/core/net-sysfs.c:2308) 
[ 12.582776][ C2] unregister_netdevice_many_notify (net/core/dev.c:2765 (discriminator 3) net/core/dev.c:12098 (discriminator 3)) 
[ 12.582782][ C2] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11987) 
[ 12.582785][ C2] ? rtnl_is_locked (net/core/rtnetlink.c:169) 
[ 12.582791][ C2] ? unregister_netdevice_queue (net/core/dev.c:11959) 
[ 12.582794][ C2] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11958) 
[ 12.582799][ C2] ? lockdep_rtnl_is_held (net/core/rtnetlink.c:182) 
[ 12.582802][ C2] ? sit_exit_rtnl_net (net/ipv6/sit.c:1822 (discriminator 1)) 
[ 12.582808][ C2] ops_undo_list (net/core/net_namespace.c:190 net/core/net_namespace.c:249) 
[ 12.582813][ C2] ? __pfx_ops_undo_list (net/core/net_namespace.c:224) 
[ 12.582816][ C2] ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 kernel/softirq.c:412) 
[ 12.582820][ C2] cleanup_net (net/core/net_namespace.c:688) 
[ 12.582823][ C2] ? __pfx_cleanup_net (net/core/net_namespace.c:652) 
[ 12.582827][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 12.582830][ C2] process_one_work (kernel/workqueue.c:3238) 
[ 12.582837][ C2] ? __pfx_process_one_work (kernel/workqueue.c:3140) 
[ 12.582843][ C2] ? assign_work (kernel/workqueue.c:1200) 
[ 12.582848][ C2] worker_thread (kernel/workqueue.c:3313 kernel/workqueue.c:3400) 
[ 12.582854][ C2] ? __pfx_worker_thread (kernel/workqueue.c:3346) 
[ 12.582858][ C2] kthread (kernel/kthread.c:464) 
[ 12.582864][ C2] ? __pfx_kthread (kernel/kthread.c:413) 
[ 12.582867][ C2] ? ret_from_fork (arch/x86/kernel/process.c:152) 
[ 12.582871][ C2] ? __lock_release (kernel/locking/lockdep.c:5534) 
[ 12.582874][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 12.582877][ C2] ? __pfx_kthread (kernel/kthread.c:413) 
[ 12.582880][ C2] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 12.582883][ C2] ? __pfx_kthread (kernel/kthread.c:413) 
[ 12.582886][ C2] ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
| [   12.606646][    C2] RCU nest depth: 0, expected: 0
| [   12.606851][    C2] INFO: lockdep is turned off.
| [   12.607053][    C2] Preemption disabled at:
| [ 12.607055][ C2] __mutex_lock (kernel/locking/mutex.c:601 kernel/locking/mutex.c:746) 
[   12.607476][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   12.607478][    C2] Workqueue: netns cleanup_net
[   12.607485][    C2] Call Trace:
[   12.607487][    C2]  <IRQ>
[ 12.607489][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 12.607496][ C2] __might_resched (kernel/sched/core.c:8819) 
[ 12.607503][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 12.607506][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 12.607509][ C2] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 12.607515][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 12.607520][ 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) 
[ 12.607526][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 12.607529][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 12.607534][ 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) 
[ 12.607539][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 12.607542][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 12.607549][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 12.607552][ 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:2333) 
[ 12.607557][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 12.607563][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 12.607566][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 12.607571][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 12.607575][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 12.607579][ C2] ? lock_acquire.part.0 (kernel/locking/lockdep.c:5870) 
[ 12.607582][ C2] ? __mutex_lock (kernel/locking/mutex.c:603 kernel/locking/mutex.c:746) 
[ 12.607585][ C2] ? cleanup_glue_dir (./include/linux/instrumented.h:68 ./include/linux/atomic/atomic-instrumented.h:32 ./include/linux/refcount.h:170 ./include/linux/kref.h:36 drivers/base/core.c:3415 drivers/base/core.c:3358) 
[ 12.607591][ C2] ? device_del (./include/linux/sched/mm.h:339 ./include/linux/sched/mm.h:369 drivers/base/core.c:3903) 
[ 12.607594][ C2] ? unregister_netdevice_many_notify (net/core/dev.c:2765 (discriminator 3) net/core/dev.c:12098 (discriminator 3)) 
[ 12.607599][ C2] ? ops_undo_list (net/core/net_namespace.c:190 net/core/net_namespace.c:249) 
[ 12.607602][ C2] ? cleanup_net (net/core/net_namespace.c:688) 
[ 12.607604][ C2] ? process_one_work (kernel/workqueue.c:3238) 
[ 12.607613][ C2] __put_net (net/core/net_namespace.c:732) 
[ 12.607617][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 12.607621][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 12.607624][ C2] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 12.607628][ C2] ? sched_balance_domains (kernel/sched/fair.c:12263) 
[ 12.607633][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 12.607637][ C2] ? mark_held_locks (kernel/locking/lockdep.c:4326) 
[ 12.607640][ C2] ? note_gp_changes (kernel/rcu/tree.c:1324 (discriminator 1)) 
[ 12.607644][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 12.607648][ C2] rcu_core (kernel/rcu/tree.c:2826) 
[ 12.607652][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 12.607657][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 12.607660][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 12.607662][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   12.607666][    C2]  </IRQ>
[   12.607667][    C2]  <TASK>
[ 12.607668][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 12.607671][ C2] RIP: 0010:lock_acquire.part.0 (kernel/locking/lockdep.c:5870) 
[ 12.607674][ C2] Code: ff ff ff 65 0f c1 05 9d 53 13 05 83 f8 01 0f 85 3e 01 00 00 9c 58 f6 c4 02 0f 85 29 01 00 00 48 85 db 74 01 fb 48 8b 44 24 30 <65> 48 2b 05 0e 17 13 05 0f 85 3a 01 00 00 48 83 c4 38 5b 5d 41 5c
All code
========
   0:	ff                   	(bad)
   1:	ff                   	(bad)
   2:	ff 65 0f             	jmp    *0xf(%rbp)
   5:	c1 05 9d 53 13 05 83 	roll   $0x83,0x513539d(%rip)        # 0x51353a9
   c:	f8                   	clc
   d:	01 0f                	add    %ecx,(%rdi)
   f:	85 3e                	test   %edi,(%rsi)
  11:	01 00                	add    %eax,(%rax)
  13:	00 9c 58 f6 c4 02 0f 	add    %bl,0xf02c4f6(%rax,%rbx,2)
  1a:	85 29                	test   %ebp,(%rcx)
  1c:	01 00                	add    %eax,(%rax)
  1e:	00 48 85             	add    %cl,-0x7b(%rax)
  21:	db 74 01 fb          	(bad)  -0x5(%rcx,%rax,1)
  25:	48 8b 44 24 30       	mov    0x30(%rsp),%rax
  2a:*	65 48 2b 05 0e 17 13 	sub    %gs:0x513170e(%rip),%rax        # 0x5131740		<-- trapping instruction
  31:	05 
  32:	0f 85 3a 01 00 00    	jne    0x172
  38:	48 83 c4 38          	add    $0x38,%rsp
  3c:	5b                   	pop    %rbx
  3d:	5d                   	pop    %rbp
  3e:	41 5c                	pop    %r12

Code starting with the faulting instruction
===========================================
   0:	65 48 2b 05 0e 17 13 	sub    %gs:0x513170e(%rip),%rax        # 0x5131716
   7:	05 
   8:	0f 85 3a 01 00 00    	jne    0x148
   e:	48 83 c4 38          	add    $0x38,%rsp
  12:	5b                   	pop    %rbx
  13:	5d                   	pop    %rbp
  14:	41 5c                	pop    %r12
[   12.607677][    C2] RSP: 0018:ffffc900004876b8 EFLAGS: 00000206
[   12.607680][    C2] RAX: 24d476ff7c811600 RBX: 0000000000000200 RCX: 0000000000000001
[   12.607682][    C2] RDX: 0000000000000000 RSI: ffffffff9ca7168b RDI: ffffffff9c250e20
[   12.607684][    C2] RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000001
[   12.607685][    C2] R10: ffffc90000487588 R11: ffffffff9d61e2a8 R12: 0000000000000000
[   12.607687][    C2] R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff9d61e2a8
[ 12.607692][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 12.607695][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 12.607697][ C2] ? cleanup_glue_dir (./include/linux/instrumented.h:68 ./include/linux/atomic/atomic-instrumented.h:32 ./include/linux/refcount.h:170 ./include/linux/kref.h:36 drivers/base/core.c:3415 drivers/base/core.c:3358) 
[ 12.607702][ C2] __mutex_lock (kernel/locking/mutex.c:603 kernel/locking/mutex.c:746) 
[ 12.607705][ C2] ? cleanup_glue_dir (./include/linux/instrumented.h:68 ./include/linux/atomic/atomic-instrumented.h:32 ./include/linux/refcount.h:170 ./include/linux/kref.h:36 drivers/base/core.c:3415 drivers/base/core.c:3358) 
[ 12.607708][ C2] ? __lock_acquire (kernel/locking/lockdep.c:5235) 
[ 12.607711][ C2] ? cleanup_glue_dir (./include/linux/instrumented.h:68 ./include/linux/atomic/atomic-instrumented.h:32 ./include/linux/refcount.h:170 ./include/linux/kref.h:36 drivers/base/core.c:3415 drivers/base/core.c:3358) 
[ 12.607714][ C2] ? __pfx___mutex_lock (kernel/locking/mutex.c:745) 
[ 12.607718][ C2] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 12.607722][ C2] ? class_to_subsys (drivers/base/class.c:67) 
[ 12.607726][ C2] ? __lock_release (kernel/locking/lockdep.c:5534) 
[ 12.607729][ 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) 
[ 12.607733][ C2] ? cleanup_glue_dir (./include/linux/instrumented.h:68 ./include/linux/atomic/atomic-instrumented.h:32 ./include/linux/refcount.h:170 ./include/linux/kref.h:36 drivers/base/core.c:3415 drivers/base/core.c:3358) 
[ 12.607736][ C2] cleanup_glue_dir (./include/linux/instrumented.h:68 ./include/linux/atomic/atomic-instrumented.h:32 ./include/linux/refcount.h:170 ./include/linux/kref.h:36 drivers/base/core.c:3415 drivers/base/core.c:3358) 
[ 12.607740][ C2] device_del (./include/linux/sched/mm.h:339 ./include/linux/sched/mm.h:369 drivers/base/core.c:3903) 
[ 12.607744][ C2] ? __pfx_device_del (drivers/base/core.c:3836) 
[ 12.607749][ C2] ? netdev_unregister_kobject (net/core/net-sysfs.c:2308) 
[ 12.607755][ C2] unregister_netdevice_many_notify (net/core/dev.c:2765 (discriminator 3) net/core/dev.c:12098 (discriminator 3)) 
[ 12.607761][ C2] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11987) 
[ 12.607764][ C2] ? rtnl_is_locked (net/core/rtnetlink.c:169) 
[ 12.607770][ C2] ? unregister_netdevice_queue (net/core/dev.c:11959) 
[ 12.607773][ C2] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11958) 
[ 12.607779][ C2] ? lockdep_rtnl_is_held (net/core/rtnetlink.c:182) 
[ 12.607781][ C2] ? sit_exit_rtnl_net (net/ipv6/sit.c:1822 (discriminator 1)) 
[ 12.607787][ C2] ops_undo_list (net/core/net_namespace.c:190 net/core/net_namespace.c:249) 
[ 12.607791][ C2] ? __pfx_ops_undo_list (net/core/net_namespace.c:224) 
[ 12.607795][ C2] ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 kernel/softirq.c:412) 
[ 12.607798][ C2] cleanup_net (net/core/net_namespace.c:688) 
[ 12.607802][ C2] ? __pfx_cleanup_net (net/core/net_namespace.c:652) 
[ 12.607805][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 12.607809][ C2] process_one_work (kernel/workqueue.c:3238) 
[ 12.607815][ C2] ? __pfx_process_one_work (kernel/workqueue.c:3140) 
[ 12.607821][ C2] ? assign_work (kernel/workqueue.c:1200) 
[ 12.607825][ C2] worker_thread (kernel/workqueue.c:3313 kernel/workqueue.c:3400) 
[ 12.607831][ C2] ? __pfx_worker_thread (kernel/workqueue.c:3346) 
[ 12.607835][ C2] kthread (kernel/kthread.c:464) 
[ 12.607841][ C2] ? __pfx_kthread (kernel/kthread.c:413) 
[ 12.607843][ C2] ? ret_from_fork (arch/x86/kernel/process.c:152) 
[ 12.607848][ C2] ? __lock_release (kernel/locking/lockdep.c:5534) 
[ 12.607850][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 12.607853][ C2] ? __pfx_kthread (kernel/kthread.c:413) 
[ 12.607857][ C2] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 12.607859][ C2] ? __pfx_kthread (kernel/kthread.c:413) 


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