======================================
| [   17.370229][    C0] 1 lock held by swapper/0/0:
| [ 17.370600][ C0] #0: ffffffffa17749c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) 
| [   17.371233][    C0]
| [   17.371233][    C0] stack backtrace:
[   17.371679][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   17.371682][    C0] Call Trace:
[   17.371684][    C0]  <IRQ>
[ 17.371687][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 17.371696][ C0] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) 
[ 17.371706][ C0] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) 
[ 17.371713][ C0] ? is_bpf_text_address (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 kernel/bpf/core.c:774) 
[ 17.371721][ C0] ? __lock_release (kernel/locking/lockdep.c:5534) 
[ 17.371728][ C0] ? save_trace (kernel/locking/lockdep.c:594) 
[ 17.371736][ C0] mark_lock (kernel/locking/lockdep.c:4754) 
[ 17.371743][ C0] mark_usage (kernel/locking/lockdep.c:4643) 
[ 17.371750][ C0] __lock_acquire (kernel/locking/lockdep.c:5189) 
[ 17.371759][ C0] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 17.371763][ C0] ? simple_pin_fs (fs/libfs.c:1066) 
[ 17.371770][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.371778][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 17.371783][ C0] ? simple_pin_fs (fs/libfs.c:1066) 
[ 17.371790][ C0] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 17.371795][ C0] ? simple_pin_fs (fs/libfs.c:1066) 
[ 17.371798][ C0] simple_pin_fs (fs/libfs.c:1066) 
[ 17.371803][ C0] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 17.371809][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 17.371817][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 17.371822][ 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) 
[ 17.371829][ C0] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 17.371835][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 17.371840][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 17.371845][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 17.371852][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.371856][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 17.371860][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 17.371863][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.371867][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.371874][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 17.371878][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.371883][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 17.371888][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 17.371900][ C0] __put_net (net/core/net_namespace.c:732) 
[ 17.371905][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 17.371912][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 17.371917][ C0] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 17.371924][ C0] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 17.371931][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 17.371938][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 17.371943][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 17.371949][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 17.371958][ C0] rcu_core (kernel/rcu/tree.c:2826) 
[ 17.371965][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 17.371974][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 17.371979][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 17.371983][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   17.371990][    C0]  </IRQ>
[   17.371991][    C0]  <TASK>
[ 17.371994][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.371999][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 17.372005][ 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
[   17.372010][    C0] RSP: 0018:ffffffffa1407df8 EFLAGS: 00000246
[   17.372015][    C0] RAX: 0000000000073aa5 RBX: 1ffffffff4280fc3 RCX: ffffffffa075ba19
[   17.372019][    C0] RDX: 0000000000000000 RSI: ffffffffa1287785 RDI: ffffffffa0a51260
[   17.372023][    C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c0667a
[   17.372026][    C0] R10: ffff8880360333d3 R11: 0000000000000000 R12: 0000000000000000
[   17.372029][    C0] R13: ffffffffa141f240 R14: dffffc0000000000 R15: 0000000000014770
[ 17.372037][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 17.372046][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 17.372050][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.372055][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.372061][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 17.372069][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 17.372080][ C0] do_idle (kernel/sched/idle.c:325) 
[ 17.372087][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.372093][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 17.372099][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 17.372106][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:501) 
[ 17.372113][ C0] x86_64_start_kernel (arch/x86/kernel/head64.c:443 (discriminator 17)) 
[ 17.372120][ C0] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   17.405388][    C0] RCU nest depth: 0, expected: 0
| [   17.405731][    C0] INFO: lockdep is turned off.
| [   17.406054][    C0] Preemption disabled at:
| [ 17.406057][ C0] schedule_preempt_disabled (kernel/sched/core.c:6919) 
[   17.407012][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   17.407015][    C0] Call Trace:
[   17.407017][    C0]  <IRQ>
[ 17.407020][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 17.407030][ C0] __might_resched (kernel/sched/core.c:8819) 
[ 17.407039][ C0] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 17.407044][ C0] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 17.407048][ C0] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 17.407054][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.407063][ 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) 
[ 17.407070][ C0] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 17.407075][ C0] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 17.407080][ 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) 
[ 17.407089][ C0] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 17.407094][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 17.407101][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 17.407106][ 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) 
[ 17.407113][ C0] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 17.407119][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 17.407123][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 17.407128][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 17.407134][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.407139][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 17.407144][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 17.407147][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.407151][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.407158][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 17.407163][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.407167][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 17.407171][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 17.407182][ C0] __put_net (net/core/net_namespace.c:732) 
[ 17.407188][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 17.407195][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 17.407199][ C0] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 17.407205][ C0] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 17.407213][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 17.407220][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 17.407226][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 17.407232][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 17.407241][ C0] rcu_core (kernel/rcu/tree.c:2826) 
[ 17.407247][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 17.407257][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 17.407262][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 17.407266][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   17.407272][    C0]  </IRQ>
[   17.407274][    C0]  <TASK>
[ 17.407276][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.407281][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 17.407287][ 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
[   17.407291][    C0] RSP: 0018:ffffffffa1407df8 EFLAGS: 00000246
[   17.407297][    C0] RAX: 0000000000073aa5 RBX: 1ffffffff4280fc3 RCX: ffffffffa075ba19
[   17.407300][    C0] RDX: 0000000000000000 RSI: ffffffffa1287785 RDI: ffffffffa0a51260
[   17.407303][    C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c0667a
[   17.407306][    C0] R10: ffff8880360333d3 R11: 0000000000000000 R12: 0000000000000000
[   17.407310][    C0] R13: ffffffffa141f240 R14: dffffc0000000000 R15: 0000000000014770
[ 17.407318][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 17.407327][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 17.407331][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.407336][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.407342][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 17.407349][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 17.407359][ C0] do_idle (kernel/sched/idle.c:325) 
[ 17.407366][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.407372][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 17.407379][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 17.407386][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:501) 
[ 17.407393][ C0] x86_64_start_kernel (arch/x86/kernel/head64.c:443 (discriminator 17)) 
[ 17.407399][ C0] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   19.943817][    C2] INFO: lockdep is turned off.
| [   19.944002][    C2] Preemption disabled at:
| [ 19.944004][ C2] 0x0 
| [   19.944342][    C2] Tainted: [W]=WARN
[   19.944343][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   19.944345][    C2] Call Trace:
[   19.944348][    C2]  <IRQ>
[ 19.944350][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 19.944358][ C2] __might_resched (kernel/sched/core.c:8819) 
[ 19.944365][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 19.944369][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 19.944372][ C2] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 19.944377][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 19.944383][ C2] ? 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) 
[ 19.944388][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 19.944391][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 19.944396][ C2] ? 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) 
[ 19.944401][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 19.944404][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 19.944409][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 19.944412][ C2] ? __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) 
[ 19.944418][ C2] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 19.944422][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 19.944425][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 19.944429][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 19.944438][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 19.944443][ C2] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 19.944447][ C2] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 19.944451][ C2] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 19.944455][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 19.944460][ C2] ? do_idle (kernel/sched/idle.c:325) 
[ 19.944463][ C2] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 19.944466][ C2] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 19.944471][ C2] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 19.944476][ C2] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 19.944481][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 19.944486][ C2] __put_net (net/core/net_namespace.c:732) 
[ 19.944489][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 19.944493][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 19.944496][ C2] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 19.944501][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 19.944505][ C2] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 19.944510][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 19.944515][ C2] rcu_core (kernel/rcu/tree.c:2826) 
[ 19.944519][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 19.944524][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 19.944526][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 19.944529][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   19.944532][    C2]  </IRQ>
[   19.944533][    C2]  <TASK>
[ 19.944535][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 19.944538][ C2] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 19.944542][ C2] 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
[   19.944545][    C2] RSP: 0018:ffffc90000147de8 EFLAGS: 00000246
[   19.944548][    C2] RAX: 0000000000000002 RBX: 1ffff92000028fc1 RCX: ffffffffa075ba19
[   19.944550][    C2] RDX: ffffed1006c2667b RSI: ffffffffa0a511e0 RDI: ffffffff9df8633f
[   19.944552][    C2] RBP: 0000000000000000 R08: 0000000000000000 R09: ffffed1006c2667a
[   19.944554][    C2] R10: ffff8880361333d3 R11: ffffffffa4132c20 R12: 0000000000000000
[   19.944556][    C2] R13: ffff888001bf2340 R14: dffffc0000000000 R15: 0000000000000000
[ 19.944560][ C2] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 19.944563][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 19.944567][ C2] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 19.944570][ C2] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 19.944572][ C2] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 19.944576][ C2] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 19.944580][ C2] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 19.944585][ C2] do_idle (kernel/sched/idle.c:325) 
[ 19.944589][ C2] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 19.944593][ C2] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 19.944596][ C2] ? __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