======================================
| [   12.837977][    C0] 1 lock held by swapper/0/0:
| [ 12.838185][ C0] #0: ffffffff891774c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2570) 
| [   12.838561][    C0]
| [   12.838561][    C0] stack backtrace:
[   12.838834][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   12.838836][    C0] Call Trace:
[   12.838838][    C0]  <IRQ>
[ 12.838840][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 12.838847][ C0] print_usage_bug.part.0 (kernel/locking/lockdep.c:4048) 
[ 12.838852][ C0] mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4059 kernel/locking/lockdep.c:4270) 
[ 12.838856][ C0] ? is_bpf_text_address (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 kernel/bpf/core.c:774) 
[ 12.838863][ C0] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 12.838867][ C0] ? save_trace (kernel/locking/lockdep.c:595) 
[ 12.838872][ C0] mark_lock (kernel/locking/lockdep.c:4756) 
[ 12.838875][ C0] mark_usage (kernel/locking/lockdep.c:4645) 
[ 12.838879][ C0] __lock_acquire (kernel/locking/lockdep.c:5194) 
[ 12.838882][ C0] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 12.838887][ C0] lock_acquire.part.0 (kernel/locking/lockdep.c:473 kernel/locking/lockdep.c:5873) 
[ 12.838890][ C0] ? simple_pin_fs (fs/libfs.c:1067) 
[ 12.838894][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 12.838901][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 12.838904][ C0] ? simple_pin_fs (fs/libfs.c:1067) 
[ 12.838908][ C0] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 12.838911][ C0] ? simple_pin_fs (fs/libfs.c:1067) 
[ 12.838913][ C0] simple_pin_fs (fs/libfs.c:1067) 
[ 12.838917][ C0] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 12.838921][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:411 lib/ref_tracker.c:195) 
[ 12.838927][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 12.838930][ 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) 
[ 12.838938][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 12.838941][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 12.838943][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 12.838946][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 12.838951][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 12.838955][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 12.838958][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 12.838961][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 12.838963][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 12.838969][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 12.838972][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 12.838974][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 12.838977][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 12.838984][ C0] __put_net (net/core/net_namespace.c:732) 
[ 12.838990][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 12.838994][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 12.838996][ C0] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 12.839000][ C0] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 12.839004][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 12.839007][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 12.839011][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 12.839015][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 12.839028][ C0] rcu_core (kernel/rcu/tree.c:2834) 
[ 12.839034][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 12.839040][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 12.839043][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 12.839046][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   12.839050][    C0]  </IRQ>
[   12.839051][    C0]  <TASK>
[ 12.839052][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 12.839055][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 12.839059][ C0] Code: a2 b4 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 83 17 0f 00 fb f4 <e9> fc 54 02 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
All code
========
   0:	a2 b4 00 c3 cc cc cc 	movabs %al,0xfccccccccc300b4
   7:	cc 0f 
   9:	1f                   	(bad)
   a:	00 90 90 90 90 90    	add    %dl,-0x6f6f6f70(%rax)
  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 83 17 0f 00 	verw   0xf1783(%rip)        # 0xf17ab
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	e9 fc 54 02 00       	jmp    0x2552b		<-- trapping instruction
  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:	e9 fc 54 02 00       	jmp    0x25501
   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
[   12.839062][    C0] RSP: 0018:ffffffff88e07df8 EFLAGS: 00000246
[   12.839066][    C0] RAX: 000000000006dc59 RBX: 1ffffffff11c0fc3 RCX: ffffffff881a25d9
[   12.839068][    C0] RDX: 0000000000000000 RSI: ffffffff88c9175c RDI: ffffffff88453ca0
[   12.839070][    C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c066fa
[   12.839071][    C0] R10: ffff8880360337d3 R11: ffffffff88e11288 R12: 0000000000000000
[   12.839073][    C0] R13: ffffffff88e1f240 R14: dffffc0000000000 R15: 0000000000014770
[ 12.839077][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 12.839082][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 12.839084][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 12.839087][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 12.839090][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 12.839095][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60) 
[ 12.839102][ C0] do_idle (kernel/sched/idle.c:325) 
[ 12.839106][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 12.839109][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 12.839112][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 12.839117][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:295) 
[ 12.839122][ C0] x86_64_start_kernel (arch/x86/kernel/head64.c:231 (discriminator 17)) 
[ 12.839127][ C0] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   12.859457][    C0] RCU nest depth: 0, expected: 0
| [   12.859657][    C0] INFO: lockdep is turned off.
| [   12.859983][    C0] Preemption disabled at:
| [ 12.859985][ C0] schedule_preempt_disabled (kernel/sched/core.c:6933) 
[   12.860450][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   12.860452][    C0] Call Trace:
[   12.860454][    C0]  <IRQ>
[ 12.860456][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 12.860461][ C0] __might_resched (kernel/sched/core.c:8796) 
[ 12.860470][ C0] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 12.860474][ C0] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 12.860477][ C0] ? simple_recursive_removal (fs/libfs.c:614) 
[ 12.860482][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 12.860487][ 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) 
[ 12.860491][ C0] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 12.860494][ 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) 
[ 12.860497][ C0] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 12.860503][ C0] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 12.860506][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:411 lib/ref_tracker.c:195) 
[ 12.860510][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 12.860512][ 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) 
[ 12.860517][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 12.860521][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 12.860523][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 12.860527][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 12.860531][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 12.860535][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 12.860538][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 12.860540][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 12.860543][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 12.860546][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 12.860549][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 12.860552][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 12.860555][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 12.860562][ C0] __put_net (net/core/net_namespace.c:732) 
[ 12.860566][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 12.860570][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 12.860573][ C0] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 12.860576][ C0] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 12.860580][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 12.860583][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 12.860587][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 12.860591][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 12.860596][ C0] rcu_core (kernel/rcu/tree.c:2834) 
[ 12.860600][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 12.860606][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 12.860609][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 12.860612][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   12.860616][    C0]  </IRQ>
[   12.860617][    C0]  <TASK>
[ 12.860618][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 12.860621][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 12.860625][ C0] Code: a2 b4 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 83 17 0f 00 fb f4 <e9> fc 54 02 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
All code
========
   0:	a2 b4 00 c3 cc cc cc 	movabs %al,0xfccccccccc300b4
   7:	cc 0f 
   9:	1f                   	(bad)
   a:	00 90 90 90 90 90    	add    %dl,-0x6f6f6f70(%rax)
  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 83 17 0f 00 	verw   0xf1783(%rip)        # 0xf17ab
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	e9 fc 54 02 00       	jmp    0x2552b		<-- trapping instruction
  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:	e9 fc 54 02 00       	jmp    0x25501
   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
[   12.860627][    C0] RSP: 0018:ffffffff88e07df8 EFLAGS: 00000246
[   12.860631][    C0] RAX: 000000000006dc59 RBX: 1ffffffff11c0fc3 RCX: ffffffff881a25d9
[   12.860633][    C0] RDX: 0000000000000000 RSI: ffffffff88c9175c RDI: ffffffff88453ca0
[   12.860635][    C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c066fa
[   12.860636][    C0] R10: ffff8880360337d3 R11: ffffffff88e11288 R12: 0000000000000000
[   12.860638][    C0] R13: ffffffff88e1f240 R14: dffffc0000000000 R15: 0000000000014770
[ 12.860642][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 12.860646][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 12.860649][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 12.860651][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 12.860655][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 12.860659][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60) 
[ 12.860664][ C0] do_idle (kernel/sched/idle.c:325) 
[ 12.860668][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 12.860671][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 12.860675][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 12.860679][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:295) 
[ 12.860683][ 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