======================================
| [ 3052.296462][    C0] 1 lock held by swapper/0/0:
| [ 3052.296688][ C0] #0: ffffffffb9d8b540 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2570) 
| [ 3052.297102][    C0]
| [ 3052.297102][    C0] stack backtrace:
[ 3052.297410][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 3052.297415][    C0] Call Trace:
[ 3052.297418][    C0]  <IRQ>
[ 3052.297420][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 3052.297429][ C0] print_usage_bug.part.0 (kernel/locking/lockdep.c:4048) 
[ 3052.297433][ C0] mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4059 kernel/locking/lockdep.c:4270) 
[ 3052.297436][ C0] ? is_bpf_text_address (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 kernel/bpf/core.c:774) 
[ 3052.297447][ C0] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 3052.297451][ C0] ? save_trace (kernel/locking/lockdep.c:595) 
[ 3052.297457][ C0] mark_lock (kernel/locking/lockdep.c:4756) 
[ 3052.297461][ C0] mark_usage (kernel/locking/lockdep.c:4645) 
[ 3052.297464][ C0] __lock_acquire (kernel/locking/lockdep.c:5194) 
[ 3052.297466][ C0] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 3052.297470][ C0] lock_acquire.part.0 (kernel/locking/lockdep.c:473 kernel/locking/lockdep.c:5873) 
[ 3052.297473][ C0] ? simple_pin_fs (fs/libfs.c:1067) 
[ 3052.297476][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 3052.297480][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 3052.297482][ C0] ? simple_pin_fs (fs/libfs.c:1067) 
[ 3052.297485][ C0] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 3052.297488][ C0] ? simple_pin_fs (fs/libfs.c:1067) 
[ 3052.297491][ C0] simple_pin_fs (fs/libfs.c:1067) 
[ 3052.297494][ C0] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 3052.297497][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 3052.297508][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 3052.297511][ 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:2376) 
[ 3052.297522][ C0] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2578) 
[ 3052.297526][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 3052.297528][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 3052.297531][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 3052.297536][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 3052.297544][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 3052.297547][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 3052.297549][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 3052.297551][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 3052.297557][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 3052.297558][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 3052.297561][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 3052.297563][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 3052.297569][ C0] __put_net (net/core/net_namespace.c:732) 
[ 3052.297576][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 3052.297580][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 3052.297583][ C0] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2578) 
[ 3052.297587][ C0] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 3052.297591][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 3052.297595][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 3052.297599][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 3052.297602][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 3052.297607][ C0] rcu_core (kernel/rcu/tree.c:2834) 
[ 3052.297613][ C0] handle_softirqs (kernel/softirq.c:580) 
[ 3052.297618][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 3052.297621][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 3052.297623][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 3052.297627][    C0]  </IRQ>
[ 3052.297628][    C0]  <TASK>
[ 3052.297630][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 3052.297633][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 3052.297637][ C0] Code: 92 d0 00 e9 03 55 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 63 97 22 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:	92                   	xchg   %eax,%edx
   1:	d0 00                	rolb   $1,(%rax)
   3:	e9 03 55 02 00       	jmp    0x2550b
   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 63 97 22 00 	verw   0x229763(%rip)        # 0x22978b
  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
[ 3052.297640][    C0] RSP: 0018:ffffffffb9a07df8 EFLAGS: 00000246
[ 3052.297645][    C0] RAX: 000000000239de2d RBX: 1ffffffff7340fc3 RCX: ffffffffb866a5f9
[ 3052.297647][    C0] RDX: 0000000000000000 RSI: ffffffffb9315cea RDI: ffffffffb8a568c0
[ 3052.297649][    C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed100cb066fa
[ 3052.297651][    C0] R10: ffff8880658337d3 R11: ffffffffb9a11288 R12: 0000000000000000
[ 3052.297652][    C0] R13: ffffffffb9a33240 R14: dffffc0000000000 R15: 0000000000014770
[ 3052.297656][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 3052.297662][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 3052.297664][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 3052.297666][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 3052.297669][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 3052.297672][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60) 
[ 3052.297680][ C0] do_idle (kernel/sched/idle.c:325) 
[ 3052.297683][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 3052.297686][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 3052.297689][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 3052.297693][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:295) 
[ 3052.297697][ C0] x86_64_start_kernel (arch/x86/kernel/head64.c:231 (discriminator 17)) 
[ 3052.297701][ C0] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [ 3052.319060][    C0] RCU nest depth: 0, expected: 0
| [ 3052.319258][    C0] INFO: lockdep is turned off.
| [ 3052.319589][    C0] Preemption disabled at:
| [ 3052.319591][ C0] schedule_preempt_disabled (kernel/sched/core.c:6933) 
[ 3052.320062][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 3052.320064][    C0] Call Trace:
[ 3052.320065][    C0]  <IRQ>
[ 3052.320066][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 3052.320071][ C0] __might_resched (kernel/sched/core.c:8796) 
[ 3052.320082][ C0] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 3052.320086][ C0] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 3052.320088][ C0] ? simple_recursive_removal (fs/libfs.c:614) 
[ 3052.320092][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 3052.320097][ 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) 
[ 3052.320101][ C0] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 3052.320104][ 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) 
[ 3052.320107][ C0] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 3052.320113][ C0] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 3052.320116][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 3052.320121][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 3052.320124][ 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:2376) 
[ 3052.320127][ C0] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2578) 
[ 3052.320131][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 3052.320134][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 3052.320137][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 3052.320141][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 3052.320144][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 3052.320147][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 3052.320150][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 3052.320152][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 3052.320155][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 3052.320157][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 3052.320159][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 3052.320162][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 3052.320169][ C0] __put_net (net/core/net_namespace.c:732) 
[ 3052.320173][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 3052.320177][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 3052.320180][ C0] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2578) 
[ 3052.320184][ C0] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 3052.320189][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 3052.320193][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 3052.320197][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 3052.320201][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 3052.320206][ C0] rcu_core (kernel/rcu/tree.c:2834) 
[ 3052.320210][ C0] handle_softirqs (kernel/softirq.c:580) 
[ 3052.320215][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 3052.320218][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 3052.320220][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 3052.320224][    C0]  </IRQ>
[ 3052.320225][    C0]  <TASK>
[ 3052.320226][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 3052.320229][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 3052.320232][ C0] Code: 92 d0 00 e9 03 55 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 63 97 22 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:	92                   	xchg   %eax,%edx
   1:	d0 00                	rolb   $1,(%rax)
   3:	e9 03 55 02 00       	jmp    0x2550b
   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 63 97 22 00 	verw   0x229763(%rip)        # 0x22978b
  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
[ 3052.320235][    C0] RSP: 0018:ffffffffb9a07df8 EFLAGS: 00000246
[ 3052.320238][    C0] RAX: 000000000239de2d RBX: 1ffffffff7340fc3 RCX: ffffffffb866a5f9
[ 3052.320240][    C0] RDX: 0000000000000000 RSI: ffffffffb9315cea RDI: ffffffffb8a568c0
[ 3052.320241][    C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed100cb066fa
[ 3052.320243][    C0] R10: ffff8880658337d3 R11: ffffffffb9a11288 R12: 0000000000000000
[ 3052.320244][    C0] R13: ffffffffb9a33240 R14: dffffc0000000000 R15: 0000000000014770
[ 3052.320248][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 3052.320254][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 3052.320256][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 3052.320258][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 3052.320261][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 3052.320265][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60) 
[ 3052.320269][ C0] do_idle (kernel/sched/idle.c:325) 
[ 3052.320272][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 3052.320275][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 3052.320278][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 3052.320282][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:295) 
[ 3052.320286][ C0] x86_64_start_kernel (arch/x86/kernel/head64.c:231 (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