======================================
| [   13.117289][    C0] 1 lock held by swapper/0/0:
| [ 13.117510][ C0] #0: ffffffffaf9749c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) 
| [   13.117899][    C0]
| [   13.117899][    C0] stack backtrace:
[   13.118175][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   13.118177][    C0] Call Trace:
[   13.118179][    C0]  <IRQ>
[ 13.118181][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 13.118186][ C0] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) 
[ 13.118191][ C0] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) 
[ 13.118194][ C0] ? is_bpf_text_address (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 kernel/bpf/core.c:774) 
[ 13.118198][ C0] ? __lock_release (kernel/locking/lockdep.c:5534) 
[ 13.118202][ C0] ? save_trace (kernel/locking/lockdep.c:594) 
[ 13.118207][ C0] mark_lock (kernel/locking/lockdep.c:4754) 
[ 13.118211][ C0] mark_usage (kernel/locking/lockdep.c:4643) 
[ 13.118214][ C0] __lock_acquire (kernel/locking/lockdep.c:5189) 
[ 13.118218][ C0] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 13.118221][ C0] ? simple_pin_fs (fs/libfs.c:1066) 
[ 13.118225][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 13.118228][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 13.118230][ C0] ? simple_pin_fs (fs/libfs.c:1066) 
[ 13.118234][ C0] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 13.118237][ C0] ? simple_pin_fs (fs/libfs.c:1066) 
[ 13.118239][ C0] simple_pin_fs (fs/libfs.c:1066) 
[ 13.118243][ C0] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 13.118246][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 13.118252][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 13.118255][ 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) 
[ 13.118260][ C0] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 13.118264][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 13.118267][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 13.118270][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 13.118274][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 13.118277][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 13.118280][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 13.118283][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 13.118285][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 13.118288][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 13.118291][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 13.118293][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 13.118295][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 13.118302][ C0] __put_net (net/core/net_namespace.c:732) 
[ 13.118306][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 13.118310][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 13.118313][ C0] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 13.118317][ C0] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 13.118322][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 13.118326][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 13.118329][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 13.118332][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 13.118337][ C0] rcu_core (kernel/rcu/tree.c:2826) 
[ 13.118340][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 13.118345][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 13.118349][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 13.118351][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   13.118354][    C0]  </IRQ>
[   13.118355][    C0]  <TASK>
[ 13.118357][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 13.118360][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 13.118364][ C0] Code: 50 b7 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 45 12 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:	50                   	push   %rax
   1:	b7 00                	mov    $0x0,%bh
   3:	e9 c3 57 02 00       	jmp    0x257cb
   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 45 12 00 	verw   0x1245c3(%rip)        # 0x1245eb
  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
[   13.118366][    C0] RSP: 0018:ffffffffaf607df8 EFLAGS: 00000246
[   13.118369][    C0] RAX: 0000000000062a81 RBX: 1ffffffff5ec0fc3 RCX: ffffffffae96ea19
[   13.118372][    C0] RDX: 0000000000000000 RSI: ffffffffaf489a45 RDI: ffffffffaec513a0
[   13.118374][    C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1005e8667a
[   13.118375][    C0] R10: ffff88802f4333d3 R11: 0000000000000000 R12: 0000000000000000
[   13.118377][    C0] R13: ffffffffaf61f240 R14: dffffc0000000000 R15: 0000000000014770
[ 13.118381][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 13.118387][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 13.118389][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 13.118391][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 13.118394][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 13.118398][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 13.118403][ C0] do_idle (kernel/sched/idle.c:325) 
[ 13.118406][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 13.118409][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 13.118412][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 13.118416][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:501) 
[ 13.118421][ C0] x86_64_start_kernel (arch/x86/kernel/head64.c:443 (discriminator 17)) 
[ 13.118424][ C0] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   13.137655][    C0] RCU nest depth: 0, expected: 0
| [   13.137860][    C0] INFO: lockdep is turned off.
| [   13.138196][    C0] Preemption disabled at:
| [ 13.138198][ C0] schedule_preempt_disabled (kernel/sched/core.c:6919) 
[   13.138678][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   13.138680][    C0] Call Trace:
[   13.138681][    C0]  <IRQ>
[ 13.138683][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 13.138688][ C0] __might_resched (kernel/sched/core.c:8819) 
[ 13.138694][ C0] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 13.138697][ C0] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 13.138700][ C0] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 13.138704][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 13.138708][ 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) 
[ 13.138713][ C0] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 13.138716][ C0] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 13.138720][ 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) 
[ 13.138725][ C0] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 13.138728][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 13.138733][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 13.138736][ 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) 
[ 13.138740][ C0] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 13.138744][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 13.138747][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 13.138752][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 13.138755][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 13.138759][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 13.138762][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 13.138764][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 13.138766][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 13.138769][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 13.138771][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 13.138773][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 13.138776][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 13.138782][ C0] __put_net (net/core/net_namespace.c:732) 
[ 13.138785][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 13.138789][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 13.138792][ C0] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 13.138797][ C0] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 13.138801][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 13.138806][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 13.138809][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 13.138813][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 13.138817][ C0] rcu_core (kernel/rcu/tree.c:2826) 
[ 13.138821][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 13.138826][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 13.138829][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 13.138832][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   13.138835][    C0]  </IRQ>
[   13.138836][    C0]  <TASK>
[ 13.138838][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 13.138840][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 13.138844][ C0] Code: 50 b7 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 45 12 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:	50                   	push   %rax
   1:	b7 00                	mov    $0x0,%bh
   3:	e9 c3 57 02 00       	jmp    0x257cb
   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 45 12 00 	verw   0x1245c3(%rip)        # 0x1245eb
  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
[   13.138847][    C0] RSP: 0018:ffffffffaf607df8 EFLAGS: 00000246
[   13.138850][    C0] RAX: 0000000000062a81 RBX: 1ffffffff5ec0fc3 RCX: ffffffffae96ea19
[   13.138852][    C0] RDX: 0000000000000000 RSI: ffffffffaf489a45 RDI: ffffffffaec513a0
[   13.138853][    C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1005e8667a
[   13.138855][    C0] R10: ffff88802f4333d3 R11: 0000000000000000 R12: 0000000000000000
[   13.138857][    C0] R13: ffffffffaf61f240 R14: dffffc0000000000 R15: 0000000000014770
[ 13.138861][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 13.138866][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 13.138868][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 13.138871][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 13.138873][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 13.138877][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 13.138881][ C0] do_idle (kernel/sched/idle.c:325) 
[ 13.138884][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 13.138887][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 13.138890][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 13.138894][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:501) 
[ 13.138898][ C0] x86_64_start_kernel (arch/x86/kernel/head64.c:443 (discriminator 17)) 


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