======================================
| [   13.036317][    C0] 1 lock held by swapper/0/0:
| [ 13.036561][ C0] #0: ffffffffaa5749c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) 
| [   13.036990][    C0]
| [   13.036990][    C0] stack backtrace:
[   13.037285][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   13.037287][    C0] Call Trace:
[   13.037289][    C0]  <IRQ>
[ 13.037291][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 13.037299][ C0] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) 
[ 13.037303][ C0] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) 
[ 13.037306][ C0] ? is_bpf_text_address (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 kernel/bpf/core.c:774) 
[ 13.037311][ C0] ? __lock_release (kernel/locking/lockdep.c:5534) 
[ 13.037315][ C0] ? save_trace (kernel/locking/lockdep.c:594) 
[ 13.037322][ C0] mark_lock (kernel/locking/lockdep.c:4754) 
[ 13.037325][ C0] mark_usage (kernel/locking/lockdep.c:4643) 
[ 13.037328][ C0] __lock_acquire (kernel/locking/lockdep.c:5189) 
[ 13.037333][ C0] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 13.037336][ C0] ? simple_pin_fs (fs/libfs.c:1066) 
[ 13.037340][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 13.037343][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 13.037346][ C0] ? simple_pin_fs (fs/libfs.c:1066) 
[ 13.037349][ C0] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 13.037352][ C0] ? simple_pin_fs (fs/libfs.c:1066) 
[ 13.037355][ C0] simple_pin_fs (fs/libfs.c:1066) 
[ 13.037358][ C0] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 13.037362][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 13.037369][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 13.037373][ 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) 
[ 13.037380][ C0] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 13.037383][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 13.037387][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 13.037389][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 13.037394][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 13.037397][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 13.037400][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 13.037403][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 13.037405][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 13.037410][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 13.037412][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 13.037414][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 13.037417][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 13.037424][ C0] __put_net (net/core/net_namespace.c:732) 
[ 13.037428][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 13.037432][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 13.037436][ C0] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 13.037440][ C0] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 13.037445][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 13.037449][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 13.037452][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 13.037455][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 13.037460][ C0] rcu_core (kernel/rcu/tree.c:2826) 
[ 13.037464][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 13.037469][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 13.037471][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 13.037474][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   13.037477][    C0]  </IRQ>
[   13.037478][    C0]  <TASK>
[ 13.037480][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 13.037483][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 13.037486][ 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
[   13.037490][    C0] RSP: 0018:ffffffffaa207df8 EFLAGS: 00000246
[   13.037493][    C0] RAX: 0000000000065add RBX: 1ffffffff5440fc3 RCX: ffffffffa956ea19
[   13.037495][    C0] RDX: 0000000000000000 RSI: ffffffffaa089a45 RDI: ffffffffa98513a0
[   13.037497][    C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c0667a
[   13.037499][    C0] R10: ffff8880360333d3 R11: 0000000000000000 R12: 0000000000000000
[   13.037501][    C0] R13: ffffffffaa21f240 R14: dffffc0000000000 R15: 0000000000014770
[ 13.037505][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 13.037510][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 13.037513][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 13.037515][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 13.037518][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 13.037521][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 13.037528][ C0] do_idle (kernel/sched/idle.c:325) 
[ 13.037531][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 13.037533][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 13.037536][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 13.037541][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:501) 
[ 13.037547][ C0] x86_64_start_kernel (arch/x86/kernel/head64.c:443 (discriminator 17)) 
[ 13.037550][ C0] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   13.059604][    C0] RCU nest depth: 0, expected: 0
| [   13.059836][    C0] INFO: lockdep is turned off.
| [   13.060316][    C0] Preemption disabled at:
| [ 13.060318][ C0] schedule_preempt_disabled (kernel/sched/core.c:6919) 
[   13.060833][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   13.060834][    C0] Call Trace:
[   13.060836][    C0]  <IRQ>
[ 13.060838][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 13.060843][ C0] __might_resched (kernel/sched/core.c:8819) 
[ 13.060851][ C0] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 13.060855][ C0] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 13.060857][ C0] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 13.060862][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 13.060866][ 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) 
[ 13.060871][ C0] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 13.060874][ C0] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 13.060878][ 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) 
[ 13.060883][ C0] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 13.060886][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 13.060891][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 13.060895][ 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) 
[ 13.060898][ C0] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 13.060902][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 13.060906][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 13.060909][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 13.060913][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 13.060916][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 13.060919][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 13.060922][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 13.060924][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 13.060927][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 13.060929][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 13.060931][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 13.060933][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 13.060941][ C0] __put_net (net/core/net_namespace.c:732) 
[ 13.060944][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 13.060948][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 13.060951][ C0] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 13.060956][ C0] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 13.060960][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 13.060965][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 13.060969][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 13.060973][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 13.060977][ C0] rcu_core (kernel/rcu/tree.c:2826) 
[ 13.060981][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 13.060986][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 13.060989][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 13.060991][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   13.060995][    C0]  </IRQ>
[   13.060996][    C0]  <TASK>
[ 13.060997][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 13.061000][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 13.061003][ 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
[   13.061006][    C0] RSP: 0018:ffffffffaa207df8 EFLAGS: 00000246
[   13.061009][    C0] RAX: 0000000000065add RBX: 1ffffffff5440fc3 RCX: ffffffffa956ea19
[   13.061011][    C0] RDX: 0000000000000000 RSI: ffffffffaa089a45 RDI: ffffffffa98513a0
[   13.061013][    C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c0667a
[   13.061015][    C0] R10: ffff8880360333d3 R11: 0000000000000000 R12: 0000000000000000
[   13.061017][    C0] R13: ffffffffaa21f240 R14: dffffc0000000000 R15: 0000000000014770
[ 13.061021][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 13.061026][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 13.061028][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 13.061031][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 13.061034][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 13.061037][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 13.061042][ C0] do_idle (kernel/sched/idle.c:325) 
[ 13.061045][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 13.061048][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 13.061051][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 13.061055][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:501) 
[ 13.061059][ 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