======================================
| [   15.809764][    C0] 1 lock held by swapper/0/0:
| [ 15.809965][ C0] #0: ffffffff8c174480 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) 
| [   15.810321][    C0]
| [   15.810321][    C0] stack backtrace:
[   15.810572][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.810574][    C0] Call Trace:
[   15.810576][    C0]  <IRQ>
[ 15.810578][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.810583][ C0] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) 
[ 15.810589][ C0] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) 
[ 15.810593][ C0] ? is_bpf_text_address (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 kernel/bpf/core.c:774) 
[ 15.810598][ C0] ? __lock_release (kernel/locking/lockdep.c:5534) 
[ 15.810602][ C0] ? save_trace (kernel/locking/lockdep.c:594) 
[ 15.810606][ C0] mark_lock (kernel/locking/lockdep.c:4754) 
[ 15.810610][ C0] mark_usage (kernel/locking/lockdep.c:4643) 
[ 15.810614][ C0] __lock_acquire (kernel/locking/lockdep.c:5189) 
[ 15.810620][ C0] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 15.810623][ C0] ? simple_pin_fs (fs/libfs.c:1066) 
[ 15.810627][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 15.810633][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 15.810636][ C0] ? simple_pin_fs (fs/libfs.c:1066) 
[ 15.810640][ C0] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 15.810643][ C0] ? simple_pin_fs (fs/libfs.c:1066) 
[ 15.810647][ C0] simple_pin_fs (fs/libfs.c:1066) 
[ 15.810651][ C0] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 15.810653][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 15.810658][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 15.810661][ 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) 
[ 15.810667][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.810670][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 15.810673][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.810675][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 15.810680][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.810683][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.810686][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.810688][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.810690][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.810695][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 15.810698][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.810701][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 15.810703][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 15.810709][ C0] __put_net (net/core/net_namespace.c:732) 
[ 15.810712][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 15.810716][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.810719][ C0] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.810723][ C0] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 15.810726][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 15.810730][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 15.810733][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 15.810737][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.810741][ C0] rcu_core (kernel/rcu/tree.c:2826) 
[ 15.810745][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 15.810749][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.810751][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.810754][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   15.810757][    C0]  </IRQ>
[   15.810758][    C0]  <TASK>
[ 15.810759][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.810762][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.810766][ 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
[   15.810769][    C0] RSP: 0018:ffffffff8be07df8 EFLAGS: 00000246
[   15.810772][    C0] RAX: 000000000006c4db RBX: 1ffffffff17c0fc3 RCX: ffffffff8b155a19
[   15.810774][    C0] RDX: 0000000000000000 RSI: ffffffff8bc85f31 RDI: ffffffff8b450ce0
[   15.810776][    C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c0667a
[   15.810778][    C0] R10: ffff8880360333d3 R11: 0000000000000000 R12: 0000000000000000
[   15.810780][    C0] R13: ffffffff8be1f240 R14: dffffc0000000000 R15: 0000000000014770
[ 15.810784][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 15.810789][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.810792][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.810794][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.810798][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 15.810802][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 15.810808][ C0] do_idle (kernel/sched/idle.c:325) 
[ 15.810812][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.810815][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 15.810818][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 15.810822][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:501) 
[ 15.810826][ C0] x86_64_start_kernel (arch/x86/kernel/head64.c:443 (discriminator 17)) 
[ 15.810830][ C0] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   15.828135][    C0] RCU nest depth: 0, expected: 0
| [   15.828321][    C0] INFO: lockdep is turned off.
| [   15.828504][    C0] Preemption disabled at:
| [ 15.828506][ C0] schedule_preempt_disabled (kernel/sched/core.c:6919) 
[   15.828938][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.828940][    C0] Call Trace:
[   15.828941][    C0]  <IRQ>
[ 15.828943][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.828948][ C0] __might_resched (kernel/sched/core.c:8819) 
[ 15.828953][ C0] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 15.828956][ C0] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 15.828959][ C0] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 15.828963][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 15.828969][ 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) 
[ 15.828973][ C0] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 15.828975][ C0] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 15.828979][ 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) 
[ 15.828983][ C0] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 15.828986][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 15.828990][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 15.828993][ 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) 
[ 15.828997][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.829000][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 15.829003][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.829006][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 15.829009][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.829012][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.829015][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.829017][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.829020][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.829023][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 15.829026][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.829029][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 15.829032][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 15.829038][ C0] __put_net (net/core/net_namespace.c:732) 
[ 15.829041][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 15.829045][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.829048][ C0] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.829052][ C0] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 15.829056][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 15.829060][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 15.829064][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 15.829067][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.829072][ C0] rcu_core (kernel/rcu/tree.c:2826) 
[ 15.829075][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 15.829080][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.829082][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.829084][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   15.829088][    C0]  </IRQ>
[   15.829089][    C0]  <TASK>
[ 15.829090][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.829093][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.829096][ 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
[   15.829099][    C0] RSP: 0018:ffffffff8be07df8 EFLAGS: 00000246
[   15.829102][    C0] RAX: 000000000006c4db RBX: 1ffffffff17c0fc3 RCX: ffffffff8b155a19
[   15.829104][    C0] RDX: 0000000000000000 RSI: ffffffff8bc85f31 RDI: ffffffff8b450ce0
[   15.829105][    C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c0667a
[   15.829107][    C0] R10: ffff8880360333d3 R11: 0000000000000000 R12: 0000000000000000
[   15.829109][    C0] R13: ffffffff8be1f240 R14: dffffc0000000000 R15: 0000000000014770
[ 15.829112][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 15.829118][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.829120][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.829122][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.829126][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 15.829130][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 15.829135][ C0] do_idle (kernel/sched/idle.c:325) 
[ 15.829139][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.829143][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 15.829146][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 15.829149][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:501) 
[ 15.829153][ C0] x86_64_start_kernel (arch/x86/kernel/head64.c:443 (discriminator 17)) 
[ 15.829157][ C0] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   17.960769][    C3] INFO: lockdep is turned off.
| [   17.960936][    C3] Preemption disabled at:
| [ 17.960938][ C3] 0x0 
| [   17.961259][    C3] Tainted: [W]=WARN
[   17.961260][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   17.961262][    C3] Call Trace:
[   17.961264][    C3]  <IRQ>
[ 17.961266][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 17.961274][ C3] __might_resched (kernel/sched/core.c:8819) 
[ 17.961280][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 17.961284][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 17.961287][ C3] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 17.961291][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.961298][ 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) 
[ 17.961303][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 17.961306][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 17.961310][ 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) 
[ 17.961314][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 17.961317][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 17.961323][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 17.961326][ 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) 
[ 17.961331][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 17.961335][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 17.961338][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 17.961341][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 17.961346][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.961350][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 17.961353][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 17.961355][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.961358][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.961362][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 17.961365][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.961368][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 17.961374][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 17.961378][ C3] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 17.961382][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.961387][ C3] __put_net (net/core/net_namespace.c:732) 
[ 17.961390][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 17.961394][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 17.961397][ C3] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 17.961402][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 17.961406][ C3] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 17.961411][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 17.961417][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 17.961420][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 17.961425][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 17.961427][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 17.961430][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   17.961433][    C3]  </IRQ>
[   17.961434][    C3]  <TASK>
[ 17.961436][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.961438][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 17.961442][ 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
[   17.961445][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000246
[   17.961449][    C3] RAX: 0000000000000003 RBX: 1ffff9200002afc1 RCX: ffffffff8b155a19
[   17.961451][    C3] RDX: ffffed1006c3667b RSI: ffffffff8b450c60 RDI: ffffffff88984d8f
[   17.961453][    C3] RBP: 0000000000000000 R08: 0000000000000000 R09: ffffed1006c3667a
[   17.961454][    C3] R10: ffff8880361b33d3 R11: ffffffff8eacf568 R12: 0000000000000000
[   17.961456][    C3] R13: ffff888001bb4640 R14: dffffc0000000000 R15: 0000000000000000
[ 17.961460][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 17.961464][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.961468][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 17.961471][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.961473][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.961476][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 17.961481][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 17.961486][ C3] do_idle (kernel/sched/idle.c:325) 
[ 17.961490][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.961493][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 17.961497][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 


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
schedule_preempt_disabled:dump_stack_lvl:__might_resched:down_write:simple_recursive_removal