======================================
| [   14.513324][    C0] 1 lock held by swapper/0/0:
| [ 14.513521][ C0] #0: ffffffffbad74480 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) 
| [   14.513874][    C0]
| [   14.513874][    C0] stack backtrace:
[   14.514121][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   14.514124][    C0] Call Trace:
[   14.514125][    C0]  <IRQ>
[ 14.514127][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 14.514132][ C0] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) 
[ 14.514138][ C0] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) 
[ 14.514141][ C0] ? is_bpf_text_address (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 kernel/bpf/core.c:774) 
[ 14.514147][ C0] ? __lock_release (kernel/locking/lockdep.c:5534) 
[ 14.514151][ C0] ? save_trace (kernel/locking/lockdep.c:594) 
[ 14.514155][ C0] mark_lock (kernel/locking/lockdep.c:4754) 
[ 14.514159][ C0] mark_usage (kernel/locking/lockdep.c:4643) 
[ 14.514163][ C0] __lock_acquire (kernel/locking/lockdep.c:5189) 
[ 14.514168][ C0] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 14.514172][ C0] ? simple_pin_fs (fs/libfs.c:1066) 
[ 14.514176][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 14.514181][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 14.514184][ C0] ? simple_pin_fs (fs/libfs.c:1066) 
[ 14.514188][ C0] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 14.514191][ C0] ? simple_pin_fs (fs/libfs.c:1066) 
[ 14.514195][ C0] simple_pin_fs (fs/libfs.c:1066) 
[ 14.514199][ C0] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 14.514202][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 14.514207][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 14.514210][ 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:2333) 
[ 14.514215][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.514218][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 14.514221][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 14.514223][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 14.514227][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.514231][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 14.514234][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 14.514236][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 14.514238][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 14.514243][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 14.514246][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 14.514249][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 14.514251][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 14.514256][ C0] __put_net (net/core/net_namespace.c:732) 
[ 14.514260][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 14.514264][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.514267][ C0] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.514270][ C0] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 14.514275][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 14.514278][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 14.514282][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 14.514285][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 14.514290][ C0] rcu_core (kernel/rcu/tree.c:2826) 
[ 14.514293][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 14.514297][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 14.514300][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 14.514302][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   14.514305][    C0]  </IRQ>
[   14.514306][    C0]  <TASK>
[ 14.514308][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.514310][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 14.514314][ C0] 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
[   14.514317][    C0] RSP: 0018:ffffffffbaa07df8 EFLAGS: 00000246
[   14.514320][    C0] RAX: 000000000006cb2b RBX: 1ffffffff7540fc3 RCX: ffffffffb9d55a19
[   14.514323][    C0] RDX: 0000000000000000 RSI: ffffffffba885f31 RDI: ffffffffba050ce0
[   14.514324][    C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c0667a
[   14.514326][    C0] R10: ffff8880360333d3 R11: 0000000000000000 R12: 0000000000000000
[   14.514328][    C0] R13: ffffffffbaa1f240 R14: dffffc0000000000 R15: 0000000000014770
[ 14.514332][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 14.514337][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 14.514339][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 14.514341][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 14.514345][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 14.514349][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 14.514356][ C0] do_idle (kernel/sched/idle.c:325) 
[ 14.514360][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 14.514363][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 14.514366][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 14.514370][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:501) 
[ 14.514374][ C0] x86_64_start_kernel (arch/x86/kernel/head64.c:443 (discriminator 17)) 
[ 14.514378][ C0] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   14.531472][    C0] RCU nest depth: 0, expected: 0
| [   14.531654][    C0] INFO: lockdep is turned off.
| [   14.531835][    C0] Preemption disabled at:
| [ 14.531837][ C0] schedule_preempt_disabled (kernel/sched/core.c:6919) 
[   14.532381][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   14.532383][    C0] Call Trace:
[   14.532385][    C0]  <IRQ>
[ 14.532386][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 14.532391][ C0] __might_resched (kernel/sched/core.c:8819) 
[ 14.532396][ C0] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 14.532400][ C0] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 14.532402][ C0] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 14.532406][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 14.532411][ 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) 
[ 14.532415][ C0] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 14.532418][ C0] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 14.532421][ 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) 
[ 14.532425][ C0] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 14.532428][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 14.532432][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 14.532435][ 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:2333) 
[ 14.532439][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.532443][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 14.532446][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 14.532449][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 14.532453][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.532456][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 14.532459][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 14.532461][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 14.532463][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 14.532468][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 14.532471][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 14.532473][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 14.532476][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 14.532482][ C0] __put_net (net/core/net_namespace.c:732) 
[ 14.532485][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 14.532488][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.532491][ C0] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.532495][ C0] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 14.532499][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 14.532503][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 14.532507][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 14.532511][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 14.532515][ C0] rcu_core (kernel/rcu/tree.c:2826) 
[ 14.532518][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 14.532523][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 14.532525][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 14.532527][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   14.532531][    C0]  </IRQ>
[   14.532532][    C0]  <TASK>
[ 14.532533][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.532536][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 14.532539][ C0] 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
[   14.532541][    C0] RSP: 0018:ffffffffbaa07df8 EFLAGS: 00000246
[   14.532544][    C0] RAX: 000000000006cb2b RBX: 1ffffffff7540fc3 RCX: ffffffffb9d55a19
[   14.532546][    C0] RDX: 0000000000000000 RSI: ffffffffba885f31 RDI: ffffffffba050ce0
[   14.532548][    C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c0667a
[   14.532549][    C0] R10: ffff8880360333d3 R11: 0000000000000000 R12: 0000000000000000
[   14.532551][    C0] R13: ffffffffbaa1f240 R14: dffffc0000000000 R15: 0000000000014770
[ 14.532555][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 14.532560][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 14.532562][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 14.532565][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 14.532568][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 14.532572][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 14.532578][ C0] do_idle (kernel/sched/idle.c:325) 
[ 14.532582][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 14.532586][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 14.532589][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 14.532592][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:501) 
[ 14.532596][ C0] x86_64_start_kernel (arch/x86/kernel/head64.c:443 (discriminator 17)) 
[ 14.532600][ C0] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   16.014804][    C3] INFO: lockdep is turned off.
| [   16.014962][    C3] Preemption disabled at:
| [ 16.014963][ C3] handle_softirqs (kernel/softirq.c:553) 
| [   16.015294][    C3] Tainted: [W]=WARN
[   16.015295][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.015297][    C3] Call Trace:
[   16.015299][    C3]  <TASK>
[ 16.015301][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 16.015308][ C3] __might_resched (kernel/sched/core.c:8819) 
[ 16.015314][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 16.015318][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 16.015321][ C3] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 16.015325][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.015331][ 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) 
[ 16.015336][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 16.015338][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 16.015343][ 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) 
[ 16.015347][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 16.015350][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 16.015354][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 16.015357][ 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) 
[ 16.015362][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 16.015366][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 16.015369][ C3] ? smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 16.015373][ C3] ? kthread (kernel/kthread.c:464) 
[ 16.015377][ C3] ? ret_from_fork (arch/x86/kernel/process.c:153) 
[ 16.015382][ C3] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 16.015387][ 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) 
[ 16.015391][ C3] ? __pfx_migrate_enable (kernel/sched/core.c:2392) 
[ 16.015395][ C3] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 16.015399][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.015404][ C3] __put_net (net/core/net_namespace.c:732) 
[ 16.015407][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 16.015410][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 16.015413][ C3] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 16.015418][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 16.015422][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.015425][ C3] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 16.015431][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 16.015435][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 16.015438][ C3] ? __pfx_run_ksoftirqd (kernel/softirq.c:961) 
[ 16.015441][ C3] run_ksoftirqd (kernel/softirq.c:436 kernel/softirq.c:969 kernel/softirq.c:960) 
[ 16.015443][ C3] smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 16.015446][ C3] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[ 16.015449][ C3] kthread (kernel/kthread.c:464) 
[ 16.015453][ C3] ? __pfx_kthread (kernel/kthread.c:413) 
[ 16.015455][ C3] ? ret_from_fork (arch/x86/kernel/process.c:152) 
[ 16.015458][ C3] ? __lock_release (kernel/locking/lockdep.c:5534) 
[ 16.015463][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.015467][ C3] ? __pfx_kthread (kernel/kthread.c:413) 
[ 16.015470][ C3] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 16.015473][ C3] ? __pfx_kthread (kernel/kthread.c:413) 


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