======================================
| [   18.128370][    C0] 1 lock held by swapper/0/0:
| [ 18.128715][ C0] #0: ffffffff93b749c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) 
| [   18.129342][    C0]
| [   18.129342][    C0] stack backtrace:
[   18.129786][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   18.129790][    C0] Call Trace:
[   18.129793][    C0]  <IRQ>
[ 18.129796][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 18.129805][ C0] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) 
[ 18.129815][ C0] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) 
[ 18.129821][ C0] ? is_bpf_text_address (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 kernel/bpf/core.c:774) 
[ 18.129829][ C0] ? __lock_release (kernel/locking/lockdep.c:5534) 
[ 18.129836][ C0] ? save_trace (kernel/locking/lockdep.c:594) 
[ 18.129844][ C0] mark_lock (kernel/locking/lockdep.c:4754) 
[ 18.129851][ C0] mark_usage (kernel/locking/lockdep.c:4643) 
[ 18.129858][ C0] __lock_acquire (kernel/locking/lockdep.c:5189) 
[ 18.129867][ C0] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 18.129871][ C0] ? simple_pin_fs (fs/libfs.c:1066) 
[ 18.129877][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 18.129884][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 18.129888][ C0] ? simple_pin_fs (fs/libfs.c:1066) 
[ 18.129895][ C0] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 18.129901][ C0] ? simple_pin_fs (fs/libfs.c:1066) 
[ 18.129906][ C0] simple_pin_fs (fs/libfs.c:1066) 
[ 18.129911][ C0] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 18.129917][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 18.129925][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 18.129930][ 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) 
[ 18.129937][ C0] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 18.129944][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 18.129948][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 18.129953][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 18.129959][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 18.129966][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 18.129971][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 18.129975][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 18.129979][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 18.129986][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 18.129991][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 18.129995][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 18.130000][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 18.130011][ C0] __put_net (net/core/net_namespace.c:732) 
[ 18.130017][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 18.130024][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 18.130028][ C0] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 18.130034][ C0] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 18.130040][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 18.130046][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 18.130052][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 18.130059][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 18.130067][ C0] rcu_core (kernel/rcu/tree.c:2826) 
[ 18.130073][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 18.130083][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 18.130087][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 18.130091][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   18.130097][    C0]  </IRQ>
[   18.130099][    C0]  <TASK>
[ 18.130102][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 18.130107][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 18.130113][ 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
[   18.130118][    C0] RSP: 0018:ffffffff93807df8 EFLAGS: 00000242
[   18.130123][    C0] RAX: 000000000006e113 RBX: 1ffffffff2700fc3 RCX: ffffffff92b5ba19
[   18.130127][    C0] RDX: 0000000000000000 RSI: ffffffff93687785 RDI: ffffffff92e51260
[   18.130130][    C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c0667a
[   18.130133][    C0] R10: ffff8880360333d3 R11: 0000000000000000 R12: 0000000000000000
[   18.130136][    C0] R13: ffffffff9381f240 R14: dffffc0000000000 R15: 0000000000014770
[ 18.130144][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 18.130154][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 18.130158][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 18.130162][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 18.130169][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 18.130176][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 18.130187][ C0] do_idle (kernel/sched/idle.c:325) 
[ 18.130193][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 18.130200][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 18.130205][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 18.130212][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:501) 
[ 18.130219][ C0] x86_64_start_kernel (arch/x86/kernel/head64.c:443 (discriminator 17)) 
[ 18.130226][ C0] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   18.159713][    C0] RCU nest depth: 0, expected: 0
| [   18.160001][    C0] INFO: lockdep is turned off.
| [   18.160319][    C0] Preemption disabled at:
| [ 18.160323][ C0] schedule_preempt_disabled (kernel/sched/core.c:6919) 
[   18.160886][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   18.160888][    C0] Call Trace:
[   18.160890][    C0]  <IRQ>
[ 18.160892][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 18.160898][ C0] __might_resched (kernel/sched/core.c:8819) 
[ 18.160904][ C0] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 18.160908][ C0] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 18.160911][ C0] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 18.160916][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 18.160923][ 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) 
[ 18.160927][ C0] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 18.160930][ C0] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 18.160935][ 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) 
[ 18.160939][ C0] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 18.160942][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 18.160948][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 18.160951][ 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) 
[ 18.160956][ C0] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 18.160961][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 18.160963][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 18.160967][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 18.160972][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 18.160976][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 18.160979][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 18.160981][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 18.160984][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 18.160988][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 18.160991][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 18.160995][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 18.160998][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 18.161005][ C0] __put_net (net/core/net_namespace.c:732) 
[ 18.161009][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 18.161013][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 18.161016][ C0] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 18.161020][ C0] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 18.161025][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 18.161029][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 18.161033][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 18.161037][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 18.161042][ C0] rcu_core (kernel/rcu/tree.c:2826) 
[ 18.161046][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 18.161050][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 18.161053][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 18.161056][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   18.161061][    C0]  </IRQ>
[   18.161062][    C0]  <TASK>
[ 18.161065][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 18.161069][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 18.161075][ 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
[   18.161079][    C0] RSP: 0018:ffffffff93807df8 EFLAGS: 00000242
[   18.161084][    C0] RAX: 000000000006e113 RBX: 1ffffffff2700fc3 RCX: ffffffff92b5ba19
[   18.161089][    C0] RDX: 0000000000000000 RSI: ffffffff93687785 RDI: ffffffff92e51260
[   18.161092][    C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c0667a
[   18.161095][    C0] R10: ffff8880360333d3 R11: 0000000000000000 R12: 0000000000000000
[   18.161098][    C0] R13: ffffffff9381f240 R14: dffffc0000000000 R15: 0000000000014770
[ 18.161107][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 18.161115][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 18.161119][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 18.161123][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 18.161129][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 18.161136][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 18.161146][ C0] do_idle (kernel/sched/idle.c:325) 
[ 18.161153][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 18.161159][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 18.161166][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 18.161173][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:501) 
[ 18.161180][ C0] x86_64_start_kernel (arch/x86/kernel/head64.c:443 (discriminator 17)) 
[ 18.161187][ C0] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   20.757763][    C0] INFO: lockdep is turned off.
| [   20.757918][    C0] Preemption disabled at:
| [ 20.757920][ C0] handle_softirqs (kernel/softirq.c:553) 
| [   20.758245][    C0] Tainted: [W]=WARN
[   20.758247][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   20.758249][    C0] Call Trace:
[   20.758251][    C0]  <TASK>
[ 20.758253][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 20.758260][ C0] __might_resched (kernel/sched/core.c:8819) 
[ 20.758266][ C0] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 20.758270][ C0] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 20.758273][ C0] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 20.758278][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 20.758284][ 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) 
[ 20.758289][ C0] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 20.758292][ C0] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 20.758296][ 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) 
[ 20.758301][ C0] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 20.758304][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 20.758310][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 20.758313][ 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) 
[ 20.758318][ C0] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 20.758322][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 20.758325][ C0] ? smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 20.758329][ C0] ? kthread (kernel/kthread.c:464) 
[ 20.758334][ C0] ? ret_from_fork (arch/x86/kernel/process.c:153) 
[ 20.758337][ C0] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 20.758341][ C0] ? migrate_enable (./arch/x86/include/asm/preempt.h:104 ./include/linux/preempt.h:481 ./include/linux/preempt.h:481 kernel/sched/core.c:2417) 
[ 20.758346][ C0] ? __pfx_migrate_enable (kernel/sched/core.c:2392) 
[ 20.758350][ C0] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 20.758355][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 20.758360][ C0] __put_net (net/core/net_namespace.c:732) 
[ 20.758364][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 20.758367][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 20.758371][ C0] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 20.758376][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 20.758380][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 20.758383][ C0] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 20.758389][ C0] rcu_core (kernel/rcu/tree.c:2826) 
[ 20.758393][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 20.758397][ C0] ? __pfx_run_ksoftirqd (kernel/softirq.c:961) 
[ 20.758400][ C0] run_ksoftirqd (kernel/softirq.c:436 kernel/softirq.c:969 kernel/softirq.c:960) 
[ 20.758402][ C0] smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 20.758405][ C0] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[ 20.758409][ C0] kthread (kernel/kthread.c:464) 
[ 20.758412][ C0] ? __pfx_kthread (kernel/kthread.c:413) 
[ 20.758415][ C0] ? ret_from_fork (arch/x86/kernel/process.c:152) 
[ 20.758417][ C0] ? __lock_release (kernel/locking/lockdep.c:5534) 
[ 20.758420][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 20.758424][ C0] ? __pfx_kthread (kernel/kthread.c:413) 
[ 20.758427][ C0] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 20.758430][ C0] ? __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