======================================
| [   15.147055][    C3] 1 lock held by swapper/3/0:
| [ 15.147239][ C3] #0: ffffffffa2974480 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) 
| [   15.147576][    C3]
| [   15.147576][    C3] stack backtrace:
[   15.147811][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.147814][    C3] Call Trace:
[   15.147817][    C3]  <IRQ>
[ 15.147819][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.147826][ C3] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) 
[ 15.147832][ C3] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) 
[ 15.147837][ C3] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 15.147842][ C3] ? save_trace (kernel/locking/lockdep.c:594) 
[ 15.147846][ C3] mark_lock (kernel/locking/lockdep.c:4754) 
[ 15.147850][ C3] mark_usage (kernel/locking/lockdep.c:4643) 
[ 15.147854][ C3] __lock_acquire (kernel/locking/lockdep.c:5189) 
[ 15.147859][ C3] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 15.147863][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 15.147868][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 15.147874][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 15.147877][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 15.147881][ C3] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 15.147885][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 15.147888][ C3] simple_pin_fs (fs/libfs.c:1066) 
[ 15.147893][ C3] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 15.147897][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 15.147903][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 15.147906][ 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:2333) 
[ 15.147911][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.147914][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 15.147917][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.147919][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 15.147923][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.147927][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.147930][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.147932][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.147934][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.147939][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 15.147942][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.147945][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.147950][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 15.147958][ C3] __put_net (net/core/net_namespace.c:732) 
[ 15.147962][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 15.147967][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.147970][ C3] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.147974][ C3] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 15.147978][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 15.147981][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 15.147985][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 15.147988][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.147993][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 15.147996][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 15.148001][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.148003][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.148005][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   15.148009][    C3]  </IRQ>
[   15.148010][    C3]  <TASK>
[ 15.148011][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.148014][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.148018][ C3] Code: b0 b8 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 a3 d0 13 00 fb f4 <c3> cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
All code
========
   0:	b0 b8                	mov    $0xb8,%al
   2:	00 c3                	add    %al,%bl
   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 a3 d0 13 00 	verw   0x13d0a3(%rip)        # 0x13d0cb
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	c3                   	ret		<-- trapping instruction
  2b:	cc                   	int3
  2c:	cc                   	int3
  2d:	cc                   	int3
  2e:	cc                   	int3
  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:	c3                   	ret
   1:	cc                   	int3
   2:	cc                   	int3
   3:	cc                   	int3
   4:	cc                   	int3
   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
[   15.148021][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000246
[   15.148025][    C3] RAX: 0000000000047bf3 RBX: 1ffff9200002afc1 RCX: ffffffffa1955a19
[   15.148027][    C3] RDX: 0000000000000000 RSI: ffffffffa2485f31 RDI: ffffffffa1c50ce0
[   15.148028][    C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c3667a
[   15.148030][    C3] R10: ffff8880361b33d3 R11: 0000000000000000 R12: 0000000000000000
[   15.148032][    C3] R13: ffff888001bb4640 R14: dffffc0000000000 R15: 0000000000000000
[ 15.148035][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 15.148041][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.148043][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.148045][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.148049][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 15.148053][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 15.148058][ C3] do_idle (kernel/sched/idle.c:325) 
[ 15.148062][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.148065][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.148069][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 15.148074][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   15.163726][    C3] RCU nest depth: 0, expected: 0
| [   15.163995][    C3] INFO: lockdep is turned off.
| [   15.164267][    C3] Preemption disabled at:
| [ 15.164269][ C3] 0x0 
[   15.164574][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.164576][    C3] Call Trace:
[   15.164578][    C3]  <IRQ>
[ 15.164580][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.164591][ C3] __might_resched (kernel/sched/core.c:8819) 
[ 15.164597][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 15.164600][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 15.164603][ C3] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 15.164607][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 15.164613][ 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) 
[ 15.164617][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 15.164620][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 15.164624][ 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) 
[ 15.164628][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 15.164631][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 15.164636][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 15.164639][ 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:2333) 
[ 15.164644][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.164648][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 15.164651][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.164655][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 15.164660][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.164664][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.164667][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.164669][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.164671][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.164676][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 15.164679][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.164682][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.164687][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 15.164693][ C3] __put_net (net/core/net_namespace.c:732) 
[ 15.164696][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 15.164700][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.164703][ C3] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.164707][ C3] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 15.164711][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 15.164715][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 15.164720][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 15.164723][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.164728][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 15.164731][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 15.164735][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.164738][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.164740][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   15.164743][    C3]  </IRQ>
[   15.164744][    C3]  <TASK>
[ 15.164745][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.164748][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.164752][ C3] Code: b0 b8 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 a3 d0 13 00 fb f4 <c3> cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
All code
========
   0:	b0 b8                	mov    $0xb8,%al
   2:	00 c3                	add    %al,%bl
   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 a3 d0 13 00 	verw   0x13d0a3(%rip)        # 0x13d0cb
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	c3                   	ret		<-- trapping instruction
  2b:	cc                   	int3
  2c:	cc                   	int3
  2d:	cc                   	int3
  2e:	cc                   	int3
  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:	c3                   	ret
   1:	cc                   	int3
   2:	cc                   	int3
   3:	cc                   	int3
   4:	cc                   	int3
   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
[   15.164755][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000246
[   15.164758][    C3] RAX: 0000000000047bf3 RBX: 1ffff9200002afc1 RCX: ffffffffa1955a19
[   15.164760][    C3] RDX: 0000000000000000 RSI: ffffffffa2485f31 RDI: ffffffffa1c50ce0
[   15.164762][    C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c3667a
[   15.164763][    C3] R10: ffff8880361b33d3 R11: 0000000000000000 R12: 0000000000000000
[   15.164765][    C3] R13: ffff888001bb4640 R14: dffffc0000000000 R15: 0000000000000000
[ 15.164769][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 15.164774][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.164777][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.164779][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.164783][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 15.164787][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 15.164792][ C3] do_idle (kernel/sched/idle.c:325) 
[ 15.164795][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.164799][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.164802][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 15.164808][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   16.980447][    C1] INFO: lockdep is turned off.
| [   16.980604][    C1] Preemption disabled at:
| [ 16.980606][ C1] handle_softirqs (kernel/softirq.c:553) 
| [   16.980921][    C1] Tainted: [W]=WARN
[   16.980922][    C1] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.980924][    C1] Call Trace:
[   16.980926][    C1]  <TASK>
[ 16.980928][ C1] dump_stack_lvl (lib/dump_stack.c:123) 
[ 16.980935][ C1] __might_resched (kernel/sched/core.c:8819) 
[ 16.980940][ C1] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 16.980944][ C1] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 16.980947][ C1] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 16.980951][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.980957][ 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) 
[ 16.980961][ C1] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 16.980964][ C1] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 16.980968][ 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) 
[ 16.980973][ C1] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 16.980975][ C1] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 16.980981][ C1] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 16.980984][ 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:2333) 
[ 16.980989][ C1] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 16.980993][ C1] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 16.980996][ C1] ? smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 16.981000][ C1] ? kthread (kernel/kthread.c:464) 
[ 16.981004][ C1] ? ret_from_fork (arch/x86/kernel/process.c:153) 
[ 16.981009][ C1] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 16.981013][ C1] ? migrate_enable (./arch/x86/include/asm/preempt.h:104 ./include/linux/preempt.h:481 ./include/linux/preempt.h:481 kernel/sched/core.c:2417) 
[ 16.981018][ C1] ? __pfx_migrate_enable (kernel/sched/core.c:2392) 
[ 16.981022][ C1] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 16.981026][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.981030][ C1] __put_net (net/core/net_namespace.c:732) 
[ 16.981034][ C1] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 16.981037][ C1] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 16.981040][ C1] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 16.981045][ C1] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 16.981049][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.981053][ C1] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 16.981059][ C1] rcu_core (kernel/rcu/tree.c:2826) 
[ 16.981062][ C1] handle_softirqs (kernel/softirq.c:579) 
[ 16.981065][ C1] ? __pfx_run_ksoftirqd (kernel/softirq.c:961) 
[ 16.981069][ C1] run_ksoftirqd (kernel/softirq.c:436 kernel/softirq.c:969 kernel/softirq.c:960) 
[ 16.981071][ C1] smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 16.981074][ C1] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[ 16.981077][ C1] kthread (kernel/kthread.c:464) 
[ 16.981081][ C1] ? __pfx_kthread (kernel/kthread.c:413) 
[ 16.981083][ C1] ? ret_from_fork (arch/x86/kernel/process.c:152) 
[ 16.981086][ C1] ? __lock_release (kernel/locking/lockdep.c:5534) 
[ 16.981091][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.981095][ C1] ? __pfx_kthread (kernel/kthread.c:413) 
[ 16.981098][ C1] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 16.981101][ C1] ? __pfx_kthread (kernel/kthread.c:413) 


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