======================================
| [   20.922790][    C0] 1 lock held by swapper/0/0:
| [ 20.923013][ C0] #0: ffffffffb39749c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) 
| [   20.923390][    C0]
| [   20.923390][    C0] stack backtrace:
[   20.923653][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   20.923655][    C0] Call Trace:
[   20.923658][    C0]  <IRQ>
[ 20.923659][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 20.923667][ C0] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) 
[ 20.923672][ C0] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) 
[ 20.923676][ C0] ? is_bpf_text_address (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 kernel/bpf/core.c:774) 
[ 20.923683][ C0] ? __lock_release (kernel/locking/lockdep.c:5534) 
[ 20.923686][ C0] ? save_trace (kernel/locking/lockdep.c:594) 
[ 20.923691][ C0] mark_lock (kernel/locking/lockdep.c:4754) 
[ 20.923696][ C0] mark_usage (kernel/locking/lockdep.c:4643) 
[ 20.923699][ C0] __lock_acquire (kernel/locking/lockdep.c:5189) 
[ 20.923705][ C0] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 20.923707][ C0] ? simple_pin_fs (fs/libfs.c:1066) 
[ 20.923711][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 20.923717][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 20.923720][ C0] ? simple_pin_fs (fs/libfs.c:1066) 
[ 20.923723][ C0] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 20.923726][ C0] ? simple_pin_fs (fs/libfs.c:1066) 
[ 20.923728][ C0] simple_pin_fs (fs/libfs.c:1066) 
[ 20.923731][ C0] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 20.923735][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 20.923741][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 20.923744][ 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:2366) 
[ 20.923749][ C0] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 20.923752][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 20.923755][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 20.923757][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 20.923763][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 20.923767][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 20.923770][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 20.923772][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 20.923775][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 20.923781][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 20.923784][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 20.923787][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 20.923790][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 20.923796][ C0] __put_net (net/core/net_namespace.c:732) 
[ 20.923800][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 20.923804][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 20.923808][ C0] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 20.923812][ C0] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 20.923816][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 20.923820][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 20.923824][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 20.923828][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 20.923832][ C0] rcu_core (kernel/rcu/tree.c:2826) 
[ 20.923837][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 20.923841][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 20.923844][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 20.923846][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   20.923850][    C0]  </IRQ>
[   20.923851][    C0]  <TASK>
[ 20.923852][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 20.923855][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 20.923860][ C0] Code: 60 b8 00 e9 c3 57 02 00 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 c3 75 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:	60                   	(bad)
   1:	b8 00 e9 c3 57       	mov    $0x57c3e900,%eax
   6:	02 00                	add    (%rax),%al
   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 c3 75 13 00 	verw   0x1375c3(%rip)        # 0x1375eb
  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
[   20.923863][    C0] RSP: 0018:ffffffffb3607df8 EFLAGS: 00000246
[   20.923866][    C0] RAX: 000000000006fbed RBX: 1ffffffff66c0fc3 RCX: ffffffffb295ba19
[   20.923869][    C0] RDX: 0000000000000000 RSI: ffffffffb3487785 RDI: ffffffffb2c51260
[   20.923871][    C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c0667a
[   20.923872][    C0] R10: ffff8880360333d3 R11: 0000000000000000 R12: 0000000000000000
[   20.923874][    C0] R13: ffffffffb361f240 R14: dffffc0000000000 R15: 0000000000014770
[ 20.923878][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 20.923883][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 20.923886][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 20.923888][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 20.923892][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 20.923897][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 20.923905][ C0] do_idle (kernel/sched/idle.c:325) 
[ 20.923909][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 20.923912][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 20.923916][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 20.923920][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:501) 
[ 20.923925][ C0] x86_64_start_kernel (arch/x86/kernel/head64.c:443 (discriminator 17)) 
[ 20.923929][ C0] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   20.942325][    C0] RCU nest depth: 0, expected: 0
| [   20.942525][    C0] INFO: lockdep is turned off.
| [   20.942725][    C0] Preemption disabled at:
| [ 20.942727][ C0] schedule_preempt_disabled (kernel/sched/core.c:6919) 
[   20.943200][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   20.943202][    C0] Call Trace:
[   20.943204][    C0]  <IRQ>
[ 20.943205][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 20.943211][ C0] __might_resched (kernel/sched/core.c:8819) 
[ 20.943218][ C0] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 20.943223][ C0] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 20.943226][ C0] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 20.943231][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 20.943238][ 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) 
[ 20.943243][ C0] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 20.943246][ C0] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 20.943250][ 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) 
[ 20.943255][ C0] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 20.943258][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 20.943263][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 20.943267][ 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:2366) 
[ 20.943273][ C0] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 20.943278][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 20.943281][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 20.943285][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 20.943290][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 20.943293][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 20.943297][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 20.943299][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 20.943301][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 20.943307][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 20.943310][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 20.943313][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 20.943317][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 20.943325][ C0] __put_net (net/core/net_namespace.c:732) 
[ 20.943329][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 20.943333][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 20.943336][ C0] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 20.943340][ C0] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 20.943345][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 20.943349][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 20.943353][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 20.943357][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 20.943362][ C0] rcu_core (kernel/rcu/tree.c:2826) 
[ 20.943366][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 20.943370][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 20.943373][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 20.943376][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   20.943380][    C0]  </IRQ>
[   20.943381][    C0]  <TASK>
[ 20.943382][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 20.943386][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 20.943390][ C0] Code: 60 b8 00 e9 c3 57 02 00 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 c3 75 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:	60                   	(bad)
   1:	b8 00 e9 c3 57       	mov    $0x57c3e900,%eax
   6:	02 00                	add    (%rax),%al
   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 c3 75 13 00 	verw   0x1375c3(%rip)        # 0x1375eb
  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
[   20.943392][    C0] RSP: 0018:ffffffffb3607df8 EFLAGS: 00000246
[   20.943396][    C0] RAX: 000000000006fbed RBX: 1ffffffff66c0fc3 RCX: ffffffffb295ba19
[   20.943398][    C0] RDX: 0000000000000000 RSI: ffffffffb3487785 RDI: ffffffffb2c51260
[   20.943400][    C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c0667a
[   20.943402][    C0] R10: ffff8880360333d3 R11: 0000000000000000 R12: 0000000000000000
[   20.943403][    C0] R13: ffffffffb361f240 R14: dffffc0000000000 R15: 0000000000014770
[ 20.943407][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 20.943412][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 20.943414][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 20.943417][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 20.943421][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 20.943425][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 20.943432][ C0] do_idle (kernel/sched/idle.c:325) 
[ 20.943436][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 20.943440][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 20.943443][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 20.943447][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:501) 
[ 20.943451][ C0] x86_64_start_kernel (arch/x86/kernel/head64.c:443 (discriminator 17)) 
[ 20.943456][ C0] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   26.883987][    C3] INFO: lockdep is turned off.
| [   26.884162][    C3] Preemption disabled at:
| [ 26.884164][ C3] handle_softirqs (kernel/softirq.c:553) 
| [   26.884531][    C3] Tainted: [W]=WARN
[   26.884533][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   26.884535][    C3] Call Trace:
[   26.884537][    C3]  <TASK>
[ 26.884539][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 26.884549][ C3] __might_resched (kernel/sched/core.c:8819) 
[ 26.884557][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 26.884563][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 26.884567][ C3] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 26.884573][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 26.884582][ 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) 
[ 26.884588][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 26.884591][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 26.884597][ 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) 
[ 26.884602][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 26.884605][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 26.884612][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 26.884615][ 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:2366) 
[ 26.884623][ C3] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 26.884628][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 26.884631][ C3] ? smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 26.884635][ C3] ? kthread (kernel/kthread.c:464) 
[ 26.884639][ C3] ? ret_from_fork (arch/x86/kernel/process.c:153) 
[ 26.884643][ C3] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 26.884651][ C3] ? migrate_enable (./arch/x86/include/asm/preempt.h:104 ./include/linux/preempt.h:481 ./include/linux/preempt.h:481 kernel/sched/core.c:2417) 
[ 26.884656][ C3] ? __pfx_migrate_enable (kernel/sched/core.c:2392) 
[ 26.884659][ C3] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 26.884664][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 26.884669][ C3] __put_net (net/core/net_namespace.c:732) 
[ 26.884673][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 26.884677][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 26.884680][ C3] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 26.884686][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 26.884690][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 26.884695][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 26.884700][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 26.884704][ C3] ? __pfx_run_ksoftirqd (kernel/softirq.c:961) 
[ 26.884707][ C3] run_ksoftirqd (kernel/softirq.c:436 kernel/softirq.c:969 kernel/softirq.c:960) 
[ 26.884709][ C3] smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 26.884712][ C3] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[ 26.884716][ C3] kthread (kernel/kthread.c:464) 
[ 26.884720][ C3] ? __pfx_kthread (kernel/kthread.c:413) 
[ 26.884722][ C3] ? ret_from_fork (arch/x86/kernel/process.c:152) 
[ 26.884724][ C3] ? __lock_release (kernel/locking/lockdep.c:5534) 
[ 26.884728][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 26.884731][ C3] ? __pfx_kthread (kernel/kthread.c:413) 
[ 26.884735][ C3] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 26.884737][ C3] ? __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
schedule_preempt_disabled:dump_stack_lvl:__might_resched:down_write:simple_recursive_removal