======================================
| [   15.647681][    C0] 1 lock held by swapper/0/0:
| [ 15.647887][ C0] #0: ffffffff90b749c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) 
| [   15.648260][    C0]
| [   15.648260][    C0] stack backtrace:
[   15.648522][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.648524][    C0] Call Trace:
[   15.648526][    C0]  <IRQ>
[ 15.648528][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.648534][ C0] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) 
[ 15.648539][ C0] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) 
[ 15.648543][ C0] ? is_bpf_text_address (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 kernel/bpf/core.c:774) 
[ 15.648549][ C0] ? __lock_release (kernel/locking/lockdep.c:5534) 
[ 15.648552][ C0] ? save_trace (kernel/locking/lockdep.c:594) 
[ 15.648557][ C0] mark_lock (kernel/locking/lockdep.c:4754) 
[ 15.648561][ C0] mark_usage (kernel/locking/lockdep.c:4643) 
[ 15.648565][ C0] __lock_acquire (kernel/locking/lockdep.c:5189) 
[ 15.648570][ C0] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 15.648573][ C0] ? simple_pin_fs (fs/libfs.c:1066) 
[ 15.648576][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 15.648582][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 15.648584][ C0] ? simple_pin_fs (fs/libfs.c:1066) 
[ 15.648587][ C0] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 15.648590][ C0] ? simple_pin_fs (fs/libfs.c:1066) 
[ 15.648592][ C0] simple_pin_fs (fs/libfs.c:1066) 
[ 15.648596][ C0] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 15.648599][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 15.648604][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 15.648607][ 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) 
[ 15.648612][ C0] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 15.648615][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 15.648618][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.648621][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 15.648625][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.648629][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.648632][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.648634][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.648636][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.648640][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 15.648643][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.648646][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 15.648649][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 15.648654][ C0] __put_net (net/core/net_namespace.c:732) 
[ 15.648658][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 15.648662][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.648665][ C0] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 15.648669][ C0] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 15.648673][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 15.648676][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 15.648680][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 15.648684][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.648688][ C0] rcu_core (kernel/rcu/tree.c:2826) 
[ 15.648692][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 15.648697][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.648699][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.648702][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   15.648705][    C0]  </IRQ>
[   15.648706][    C0]  <TASK>
[ 15.648707][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.648710][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.648714][ 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
[   15.648717][    C0] RSP: 0018:ffffffff90807df8 EFLAGS: 00000246
[   15.648720][    C0] RAX: 00000000000739c3 RBX: 1ffffffff2100fc3 RCX: ffffffff8fb5ba19
[   15.648723][    C0] RDX: 0000000000000000 RSI: ffffffff90687785 RDI: ffffffff8fe51260
[   15.648724][    C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1005e8667a
[   15.648726][    C0] R10: ffff88802f4333d3 R11: 0000000000000000 R12: 0000000000000000
[   15.648728][    C0] R13: ffffffff9081f240 R14: dffffc0000000000 R15: 0000000000014770
[ 15.648732][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 15.648736][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.648739][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.648741][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.648745][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 15.648749][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 15.648756][ C0] do_idle (kernel/sched/idle.c:325) 
[ 15.648760][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.648764][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 15.648767][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 15.648771][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:501) 
[ 15.648776][ C0] x86_64_start_kernel (arch/x86/kernel/head64.c:443 (discriminator 17)) 
[ 15.648780][ C0] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   15.666647][    C0] RCU nest depth: 0, expected: 0
| [   15.666840][    C0] INFO: lockdep is turned off.
| [   15.667038][    C0] Preemption disabled at:
| [ 15.667039][ C0] schedule_preempt_disabled (kernel/sched/core.c:6919) 
[   15.667609][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.667611][    C0] Call Trace:
[   15.667612][    C0]  <IRQ>
[ 15.667613][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.667618][ C0] __might_resched (kernel/sched/core.c:8819) 
[ 15.667624][ C0] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 15.667628][ C0] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 15.667631][ C0] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 15.667635][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 15.667640][ 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) 
[ 15.667645][ C0] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 15.667648][ C0] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 15.667651][ 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) 
[ 15.667656][ C0] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 15.667659][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 15.667663][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 15.667666][ 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) 
[ 15.667671][ C0] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 15.667675][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 15.667678][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.667681][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 15.667685][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.667689][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.667692][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.667694][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.667697][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.667701][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 15.667704][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.667707][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 15.667710][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 15.667717][ C0] __put_net (net/core/net_namespace.c:732) 
[ 15.667720][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 15.667724][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.667727][ C0] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 15.667731][ C0] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 15.667735][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 15.667739][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 15.667744][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 15.667747][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.667752][ C0] rcu_core (kernel/rcu/tree.c:2826) 
[ 15.667755][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 15.667760][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.667762][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.667765][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   15.667768][    C0]  </IRQ>
[   15.667769][    C0]  <TASK>
[ 15.667771][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.667774][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.667778][ 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
[   15.667780][    C0] RSP: 0018:ffffffff90807df8 EFLAGS: 00000246
[   15.667783][    C0] RAX: 00000000000739c3 RBX: 1ffffffff2100fc3 RCX: ffffffff8fb5ba19
[   15.667785][    C0] RDX: 0000000000000000 RSI: ffffffff90687785 RDI: ffffffff8fe51260
[   15.667787][    C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1005e8667a
[   15.667789][    C0] R10: ffff88802f4333d3 R11: 0000000000000000 R12: 0000000000000000
[   15.667791][    C0] R13: ffffffff9081f240 R14: dffffc0000000000 R15: 0000000000014770
[ 15.667795][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 15.667799][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.667801][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.667804][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.667808][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 15.667812][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 15.667818][ C0] do_idle (kernel/sched/idle.c:325) 
[ 15.667822][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.667826][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 15.667829][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 15.667833][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:501) 
[ 15.667838][ C0] x86_64_start_kernel (arch/x86/kernel/head64.c:443 (discriminator 17)) 
[ 15.667842][ C0] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   17.457032][    C3] INFO: lockdep is turned off.
| [   17.457205][    C3] Preemption disabled at:
| [ 17.457207][ C3] 0x0 
| [   17.457522][    C3] Tainted: [W]=WARN
[   17.457523][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   17.457525][    C3] Call Trace:
[   17.457527][    C3]  <IRQ>
[ 17.457529][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 17.457537][ C3] __might_resched (kernel/sched/core.c:8819) 
[ 17.457544][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 17.457549][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 17.457552][ C3] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 17.457557][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.457563][ 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) 
[ 17.457568][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 17.457571][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 17.457575][ 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) 
[ 17.457580][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 17.457583][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 17.457588][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 17.457591][ 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) 
[ 17.457596][ C3] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 17.457600][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 17.457603][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 17.457607][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 17.457612][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.457616][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 17.457619][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 17.457621][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.457624][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.457629][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 17.457632][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.457635][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 17.457640][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 17.457644][ C3] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 17.457648][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.457653][ C3] __put_net (net/core/net_namespace.c:732) 
[ 17.457657][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 17.457660][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 17.457663][ C3] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 17.457669][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 17.457673][ C3] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 17.457677][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 17.457683][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 17.457687][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 17.457692][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 17.457695][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 17.457697][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   17.457700][    C3]  </IRQ>
[   17.457702][    C3]  <TASK>
[ 17.457703][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.457706][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 17.457710][ C3] 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
[   17.457713][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000246
[   17.457716][    C3] RAX: 0000000000000003 RBX: 1ffff9200002afc1 RCX: ffffffff8fb5ba19
[   17.457719][    C3] RDX: ffffed1005eb667b RSI: ffffffff8fe511e0 RDI: ffffffff8d38633f
[   17.457720][    C3] RBP: 0000000000000000 R08: 0000000000000000 R09: ffffed1005eb667a
[   17.457722][    C3] R10: ffff88802f5b33d3 R11: ffff888001ef0558 R12: 0000000000000000
[   17.457724][    C3] R13: ffff888001bf4640 R14: dffffc0000000000 R15: 0000000000000000
[ 17.457728][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 17.457731][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.457735][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 17.457738][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.457740][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.457744][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 17.457748][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 17.457753][ C3] do_idle (kernel/sched/idle.c:325) 
[ 17.457757][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.457761][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 17.457765][ 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