======================================
| [   17.108116][    C0] 1 lock held by swapper/0/0:
| [ 17.108328][ C0] #0: ffffffff8a374c00 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) 
| [   17.108696][    C0]
| [   17.108696][    C0] stack backtrace:
[   17.108959][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   17.108961][    C0] Call Trace:
[   17.108963][    C0]  <IRQ>
[ 17.108965][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 17.108971][ C0] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) 
[ 17.108976][ C0] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) 
[ 17.108980][ C0] ? is_bpf_text_address (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 kernel/bpf/core.c:774) 
[ 17.108985][ C0] ? __lock_release (kernel/locking/lockdep.c:5534) 
[ 17.108989][ C0] ? save_trace (kernel/locking/lockdep.c:594) 
[ 17.108996][ C0] mark_lock (kernel/locking/lockdep.c:4754) 
[ 17.108999][ C0] mark_usage (kernel/locking/lockdep.c:4643) 
[ 17.109002][ C0] __lock_acquire (kernel/locking/lockdep.c:5189) 
[ 17.109007][ C0] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 17.109010][ C0] ? simple_pin_fs (fs/libfs.c:1066) 
[ 17.109013][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.109017][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 17.109020][ C0] ? simple_pin_fs (fs/libfs.c:1066) 
[ 17.109023][ C0] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 17.109026][ C0] ? simple_pin_fs (fs/libfs.c:1066) 
[ 17.109028][ C0] simple_pin_fs (fs/libfs.c:1066) 
[ 17.109031][ C0] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 17.109035][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 17.109040][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 17.109043][ 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) 
[ 17.109048][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 17.109051][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 17.109053][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 17.109056][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 17.109061][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.109065][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 17.109068][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 17.109071][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.109073][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.109078][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 17.109080][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.109082][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 17.109085][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 17.109090][ C0] __put_net (net/core/net_namespace.c:732) 
[ 17.109093][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 17.109097][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 17.109099][ C0] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 17.109102][ C0] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 17.109106][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 17.109109][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 17.109113][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 17.109116][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 17.109120][ C0] rcu_core (kernel/rcu/tree.c:2826) 
[ 17.109125][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 17.109130][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 17.109133][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 17.109136][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   17.109139][    C0]  </IRQ>
[   17.109140][    C0]  <TASK>
[ 17.109141][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.109144][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 17.109148][ C0] Code: 00 b2 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 b0 0b 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:	00 b2 00 c3 cc cc    	add    %dh,-0x33333d00(%rdx)
   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 b0 0b 00 	verw   0xbb0a3(%rip)        # 0xbb0cb
  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
[   17.109151][    C0] RSP: 0018:ffffffff8a007df8 EFLAGS: 00000242
[   17.109155][    C0] RAX: 000000000006ff85 RBX: 1ffffffff1400fc3 RCX: ffffffff893d7a19
[   17.109157][    C0] RDX: 0000000000000000 RSI: ffffffff89e9c7ba RDI: ffffffff89655ce0
[   17.109159][    C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c0667a
[   17.109160][    C0] R10: ffff8880360333d3 R11: 0000000000000000 R12: 0000000000000000
[   17.109162][    C0] R13: ffffffff8a01f240 R14: dffffc0000000000 R15: 0000000000014770
[ 17.109166][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 17.109171][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 17.109174][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.109176][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.109179][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 17.109183][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 17.109188][ C0] do_idle (kernel/sched/idle.c:325) 
[ 17.109191][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.109194][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 17.109197][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 17.109201][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:501) 
[ 17.109205][ C0] x86_64_start_kernel (arch/x86/kernel/head64.c:443 (discriminator 17)) 
[ 17.109209][ C0] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   17.126555][    C0] RCU nest depth: 0, expected: 0
| [   17.126740][    C0] INFO: lockdep is turned off.
| [   17.126919][    C0] Preemption disabled at:
| [ 17.126921][ C0] schedule_preempt_disabled (kernel/sched/core.c:6919) 
[   17.127455][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   17.127458][    C0] Call Trace:
[   17.127459][    C0]  <IRQ>
[ 17.127461][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 17.127467][ C0] __might_resched (kernel/sched/core.c:8819) 
[ 17.127474][ C0] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 17.127477][ C0] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 17.127479][ C0] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 17.127483][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.127488][ 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) 
[ 17.127493][ C0] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 17.127496][ C0] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 17.127500][ 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) 
[ 17.127505][ C0] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 17.127508][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 17.127512][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 17.127516][ 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) 
[ 17.127520][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 17.127524][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 17.127526][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 17.127532][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 17.127537][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.127540][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 17.127543][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 17.127546][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.127549][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.127552][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 17.127554][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.127557][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 17.127559][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 17.127566][ C0] __put_net (net/core/net_namespace.c:732) 
[ 17.127569][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 17.127572][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 17.127575][ C0] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 17.127578][ C0] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 17.127583][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 17.127586][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 17.127590][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 17.127593][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 17.127598][ C0] rcu_core (kernel/rcu/tree.c:2826) 
[ 17.127602][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 17.127608][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 17.127611][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 17.127614][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   17.127617][    C0]  </IRQ>
[   17.127618][    C0]  <TASK>
[ 17.127619][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.127622][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 17.127625][ C0] Code: 00 b2 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 b0 0b 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:	00 b2 00 c3 cc cc    	add    %dh,-0x33333d00(%rdx)
   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 b0 0b 00 	verw   0xbb0a3(%rip)        # 0xbb0cb
  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
[   17.127628][    C0] RSP: 0018:ffffffff8a007df8 EFLAGS: 00000242
[   17.127631][    C0] RAX: 000000000006ff85 RBX: 1ffffffff1400fc3 RCX: ffffffff893d7a19
[   17.127633][    C0] RDX: 0000000000000000 RSI: ffffffff89e9c7ba RDI: ffffffff89655ce0
[   17.127635][    C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c0667a
[   17.127637][    C0] R10: ffff8880360333d3 R11: 0000000000000000 R12: 0000000000000000
[   17.127638][    C0] R13: ffffffff8a01f240 R14: dffffc0000000000 R15: 0000000000014770
[ 17.127642][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 17.127647][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 17.127650][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.127653][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.127656][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 17.127659][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 17.127664][ C0] do_idle (kernel/sched/idle.c:325) 
[ 17.127668][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.127670][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 17.127673][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 17.127677][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:501) 
[ 17.127680][ C0] x86_64_start_kernel (arch/x86/kernel/head64.c:443 (discriminator 17)) 


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