======================================
| [   15.861359][    C0] 1 lock held by swapper/0/0:
| [ 15.861593][ C0] #0: ffffffff8ab774c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2570) 
| [   15.862007][    C0]
| [   15.862007][    C0] stack backtrace:
[   15.862301][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.862303][    C0] Call Trace:
[   15.862304][    C0]  <IRQ>
[ 15.862306][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.862312][ C0] print_usage_bug.part.0 (kernel/locking/lockdep.c:4048) 
[ 15.862317][ C0] mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4059 kernel/locking/lockdep.c:4270) 
[ 15.862320][ C0] ? is_bpf_text_address (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 kernel/bpf/core.c:774) 
[ 15.862325][ C0] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 15.862329][ C0] ? save_trace (kernel/locking/lockdep.c:595) 
[ 15.862335][ C0] mark_lock (kernel/locking/lockdep.c:4756) 
[ 15.862339][ C0] mark_usage (kernel/locking/lockdep.c:4645) 
[ 15.862342][ C0] __lock_acquire (kernel/locking/lockdep.c:5194) 
[ 15.862345][ C0] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 15.862349][ C0] lock_acquire.part.0 (kernel/locking/lockdep.c:473 kernel/locking/lockdep.c:5873) 
[ 15.862352][ C0] ? simple_pin_fs (fs/libfs.c:1067) 
[ 15.862356][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 15.862360][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 15.862363][ C0] ? simple_pin_fs (fs/libfs.c:1067) 
[ 15.862367][ C0] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 15.862371][ C0] ? simple_pin_fs (fs/libfs.c:1067) 
[ 15.862374][ C0] simple_pin_fs (fs/libfs.c:1067) 
[ 15.862378][ C0] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 15.862381][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:411 lib/ref_tracker.c:195) 
[ 15.862387][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 15.862390][ 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) 
[ 15.862396][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.862398][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 15.862402][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.862404][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 15.862409][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.862414][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 15.862417][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 15.862419][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.862422][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.862425][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 15.862428][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.862430][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 15.862433][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 15.862438][ C0] __put_net (net/core/net_namespace.c:732) 
[ 15.862442][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 15.862446][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.862449][ C0] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.862452][ C0] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 15.862456][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 15.862459][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 15.862463][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 15.862466][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.862470][ C0] rcu_core (kernel/rcu/tree.c:2834) 
[ 15.862475][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 15.862480][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.862483][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.862486][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   15.862489][    C0]  </IRQ>
[   15.862490][    C0]  <TASK>
[ 15.862492][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.862494][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 15.862499][ C0] Code: a2 b5 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 47 10 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 b5 00 c3 cc cc cc 	movabs %al,0xfccccccccc300b5
   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 47 10 00 	verw   0x104783(%rip)        # 0x1047ab
  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
[   15.862501][    C0] RSP: 0018:ffffffff8a807df8 EFLAGS: 00000242
[   15.862504][    C0] RAX: 000000000006a97f RBX: 1ffffffff1500fc3 RCX: ffffffff89b8f5d9
[   15.862506][    C0] RDX: 0000000000000000 RSI: ffffffff8a68f4e4 RDI: ffffffff89e53be0
[   15.862508][    C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c066fa
[   15.862509][    C0] R10: ffff8880360337d3 R11: ffffffff8a811288 R12: 0000000000000000
[   15.862511][    C0] R13: ffffffff8a81f240 R14: dffffc0000000000 R15: 0000000000014770
[ 15.862515][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 15.862520][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 15.862522][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.862525][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.862528][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 15.862532][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60) 
[ 15.862537][ C0] do_idle (kernel/sched/idle.c:325) 
[ 15.862541][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.862543][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 15.862547][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 15.862551][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:295) 
[ 15.862556][ C0] x86_64_start_kernel (arch/x86/kernel/head64.c:231 (discriminator 17)) 
[ 15.862559][ C0] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   15.883902][    C0] RCU nest depth: 0, expected: 0
| [   15.884127][    C0] INFO: lockdep is turned off.
| [   15.884345][    C0] Preemption disabled at:
| [ 15.884347][ C0] schedule_preempt_disabled (kernel/sched/core.c:6933) 
[   15.884985][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.884987][    C0] Call Trace:
[   15.884988][    C0]  <IRQ>
[ 15.884990][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.884995][ C0] __might_resched (kernel/sched/core.c:8796) 
[ 15.885001][ C0] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 15.885005][ C0] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 15.885008][ C0] ? simple_recursive_removal (fs/libfs.c:614) 
[ 15.885012][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 15.885017][ 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) 
[ 15.885023][ C0] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 15.885025][ 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) 
[ 15.885029][ C0] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 15.885034][ C0] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 15.885037][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:411 lib/ref_tracker.c:195) 
[ 15.885042][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 15.885046][ 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) 
[ 15.885050][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.885053][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 15.885056][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.885060][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 15.885064][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.885068][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 15.885071][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 15.885074][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.885076][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.885079][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 15.885081][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.885084][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 15.885087][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 15.885094][ C0] __put_net (net/core/net_namespace.c:732) 
[ 15.885097][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 15.885101][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.885104][ C0] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.885107][ C0] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 15.885112][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 15.885116][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 15.885120][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 15.885123][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.885128][ C0] rcu_core (kernel/rcu/tree.c:2834) 
[ 15.885132][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 15.885137][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.885140][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.885143][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   15.885147][    C0]  </IRQ>
[   15.885148][    C0]  <TASK>
[ 15.885149][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.885152][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 15.885156][ C0] Code: a2 b5 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 47 10 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 b5 00 c3 cc cc cc 	movabs %al,0xfccccccccc300b5
   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 47 10 00 	verw   0x104783(%rip)        # 0x1047ab
  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
[   15.885158][    C0] RSP: 0018:ffffffff8a807df8 EFLAGS: 00000242
[   15.885161][    C0] RAX: 000000000006a97f RBX: 1ffffffff1500fc3 RCX: ffffffff89b8f5d9
[   15.885163][    C0] RDX: 0000000000000000 RSI: ffffffff8a68f4e4 RDI: ffffffff89e53be0
[   15.885165][    C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c066fa
[   15.885166][    C0] R10: ffff8880360337d3 R11: ffffffff8a811288 R12: 0000000000000000
[   15.885168][    C0] R13: ffffffff8a81f240 R14: dffffc0000000000 R15: 0000000000014770
[ 15.885172][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 15.885177][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 15.885179][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.885182][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.885185][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 15.885189][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60) 
[ 15.885194][ C0] do_idle (kernel/sched/idle.c:325) 
[ 15.885197][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.885200][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 15.885204][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 15.885208][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:295) 
[ 15.885212][ C0] x86_64_start_kernel (arch/x86/kernel/head64.c:231 (discriminator 17)) 
[ 15.885216][ C0] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   18.059679][    C2] INFO: lockdep is turned off.
| [   18.059909][    C2] Preemption disabled at:
| [ 18.059911][ C2] __slab_alloc.constprop.0 (mm/slub.c:3945) 
| [   18.060373][    C2] Tainted: [W]=WARN
[   18.060374][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   18.060376][    C2] Call Trace:
[   18.060378][    C2]  <IRQ>
[ 18.060380][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 18.060388][ C2] __might_resched (kernel/sched/core.c:8796) 
[ 18.060395][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 18.060399][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 18.060402][ C2] ? simple_recursive_removal (fs/libfs.c:614) 
[ 18.060406][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 18.060411][ C2] ? 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) 
[ 18.060417][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 18.060420][ C2] ? 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) 
[ 18.060423][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 18.060428][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 18.060431][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:411 lib/ref_tracker.c:195) 
[ 18.060437][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 18.060440][ C2] ? __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) 
[ 18.060446][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 18.060449][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 18.060452][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 18.060457][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 18.060462][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 18.060466][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 18.060469][ C2] ? unwind_next_frame (./include/linux/rcupdate.h:842 ./include/linux/rcupdate.h:1155 arch/x86/kernel/unwind_orc.c:479) 
[ 18.060473][ C2] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 18.060478][ C2] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 18.060480][ C2] ? set_track_prepare (mm/slub.c:936) 
[ 18.060484][ C2] ? ___slab_alloc (mm/slub.c:967 mm/slub.c:3848) 
[ 18.060487][ C2] ? __slab_alloc.constprop.0 (mm/slub.c:3948) 
[ 18.060490][ C2] ? __kmalloc_cache_noprof (mm/slub.c:4023 mm/slub.c:4184 mm/slub.c:4353) 
[ 18.060493][ C2] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 18.060497][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 18.060501][ C2] __put_net (net/core/net_namespace.c:732) 
[ 18.060505][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 18.060509][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 18.060511][ C2] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 18.060516][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 18.060519][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 18.060522][ C2] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 18.060529][ C2] rcu_core (kernel/rcu/tree.c:2834) 
[ 18.060534][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 18.060539][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 18.060542][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 18.060545][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   18.060549][    C2]  </IRQ>
[   18.060550][    C2]  <TASK>
[ 18.060551][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 18.060554][ C2] RIP: 0010:lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 18.060558][ C2] Code: fd 53 44 89 c3 48 83 ec 10 4c 8b 54 24 48 66 90 65 8b 05 12 4a 14 05 83 f8 3f 0f 87 1a 01 00 00 89 c0 48 0f a3 05 9b 32 20 04 <0f> 82 b8 00 00 00 8b 05 03 43 20 04 85 c0 0f 85 80 00 00 00 48 83
All code
========
   0:	fd                   	std
   1:	53                   	push   %rbx
   2:	44 89 c3             	mov    %r8d,%ebx
   5:	48 83 ec 10          	sub    $0x10,%rsp
   9:	4c 8b 54 24 48       	mov    0x48(%rsp),%r10
   e:	66 90                	xchg   %ax,%ax
  10:	65 8b 05 12 4a 14 05 	mov    %gs:0x5144a12(%rip),%eax        # 0x5144a29
  17:	83 f8 3f             	cmp    $0x3f,%eax
  1a:	0f 87 1a 01 00 00    	ja     0x13a
  20:	89 c0                	mov    %eax,%eax
  22:	48 0f a3 05 9b 32 20 	bt     %rax,0x420329b(%rip)        # 0x42032c5
  29:	04 
  2a:*	0f 82 b8 00 00 00    	jb     0xe8		<-- trapping instruction
  30:	8b 05 03 43 20 04    	mov    0x4204303(%rip),%eax        # 0x4204339
  36:	85 c0                	test   %eax,%eax
  38:	0f 85 80 00 00 00    	jne    0xbe
  3e:	48                   	rex.W
  3f:	83                   	.byte 0x83

Code starting with the faulting instruction
===========================================
   0:	0f 82 b8 00 00 00    	jb     0xbe
   6:	8b 05 03 43 20 04    	mov    0x4204303(%rip),%eax        # 0x420430f
   c:	85 c0                	test   %eax,%eax
   e:	0f 85 80 00 00 00    	jne    0x94
  14:	48                   	rex.W
  15:	83                   	.byte 0x83
[   18.060561][    C2] RSP: 0018:ffffc90000a57800 EFLAGS: 00000297
[   18.060565][    C2] RAX: 0000000000000002 RBX: 0000000000000000 RCX: 0000000000000002
[   18.060567][    C2] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8ab775e0
[   18.060568][    C2] RBP: ffffffff8ab775e0 R08: 0000000000000000 R09: 0000000000000000
[   18.060570][    C2] R10: ffffffff87212687 R11: ffffc90000a57990 R12: 0000000000000000
[   18.060572][    C2] R13: 0000000000000000 R14: 0000000000000002 R15: 0000000000000000
[ 18.060575][ C2] ? unwind_next_frame (./include/linux/rcupdate.h:331 ./include/linux/rcupdate.h:841 ./include/linux/rcupdate.h:1155 arch/x86/kernel/unwind_orc.c:479) 
[ 18.060580][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 18.060584][ C2] unwind_next_frame (./include/linux/rcupdate.h:842 ./include/linux/rcupdate.h:1155 arch/x86/kernel/unwind_orc.c:479) 
[ 18.060587][ C2] ? unwind_next_frame (./include/linux/rcupdate.h:331 ./include/linux/rcupdate.h:841 ./include/linux/rcupdate.h:1155 arch/x86/kernel/unwind_orc.c:479) 
[ 18.060590][ C2] ? do_group_exit (kernel/exit.c:1089) 
[ 18.060595][ C2] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 18.060599][ C2] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 18.060603][ C2] ? do_group_exit (kernel/exit.c:1089) 
[ 18.060606][ C2] ? kernel_text_address (kernel/extable.c:99) 
[ 18.060609][ C2] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 18.060613][ C2] arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 18.060618][ C2] ? do_group_exit (kernel/exit.c:1089) 
[ 18.060623][ C2] stack_trace_save (kernel/stacktrace.c:123) 
[ 18.060625][ C2] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 18.060629][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 18.060632][ C2] set_track_prepare (mm/slub.c:936) 
[ 18.060636][ C2] ? __kmalloc_cache_noprof (mm/slub.c:4023 mm/slub.c:4184 mm/slub.c:4353) 
[ 18.060638][ C2] ? kmem_cache_free (mm/slub.c:2333 mm/slub.c:4642 mm/slub.c:4744) 
[ 18.060643][ C2] ? exit_mmap (mm/mmap.c:1311) 
[ 18.060648][ C2] ? mmput (kernel/fork.c:1449 kernel/fork.c:1383 kernel/fork.c:1404) 
[ 18.060650][ C2] ? exit_mm (kernel/exit.c:596) 
[ 18.060653][ C2] ? do_exit (kernel/exit.c:950) 
[ 18.060656][ C2] ? do_group_exit (kernel/exit.c:1089) 
[ 18.060661][ C2] ___slab_alloc (mm/slub.c:967 mm/slub.c:3848) 
[ 18.060665][ C2] ? kmem_cache_free (mm/slub.c:2333 mm/slub.c:4642 mm/slub.c:4744) 
[ 18.060669][ C2] ? kmem_cache_free (mm/slub.c:2333 mm/slub.c:4642 mm/slub.c:4744) 
[ 18.060672][ C2] __slab_alloc.constprop.0 (mm/slub.c:3948) 
[ 18.060676][ C2] ? kmem_cache_free (mm/slub.c:2333 mm/slub.c:4642 mm/slub.c:4744) 
[ 18.060679][ C2] __kmalloc_cache_noprof (mm/slub.c:4023 mm/slub.c:4184 mm/slub.c:4353) 
[ 18.060684][ C2] kmem_cache_free (mm/slub.c:2333 mm/slub.c:4642 mm/slub.c:4744) 
[ 18.060688][ C2] ? exit_mmap (mm/mmap.c:1311) 
[ 18.060692][ C2] exit_mmap (mm/mmap.c:1311) 
[ 18.060697][ C2] ? __pfx_exit_mmap (mm/mmap.c:1259) 
[ 18.060700][ C2] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:727 kernel/locking/mutex.c:746) 
[ 18.060704][ C2] ? lock_release (kernel/locking/lockdep.c:118 kernel/locking/lockdep.c:5884) 
[ 18.060708][ C2] ? __mutex_unlock_slowpath (./arch/x86/include/asm/atomic64_64.h:101 ./include/linux/atomic/atomic-arch-fallback.h:4329 ./include/linux/atomic/atomic-long.h:1506 ./include/linux/atomic/atomic-instrumented.h:4481 kernel/locking/mutex.c:924) 
[ 18.060716][ C2] mmput (kernel/fork.c:1449 kernel/fork.c:1383 kernel/fork.c:1404) 
[ 18.060720][ C2] exit_mm (kernel/exit.c:596) 
[ 18.060726][ C2] do_exit (kernel/exit.c:950) 
[ 18.060731][ C2] do_group_exit (kernel/exit.c:1089) 
[ 18.060735][ C2] __x64_sys_exit_group (kernel/exit.c:1117) 
[ 18.060739][ C2] x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 18.060743][ C2] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 18.060746][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   18.060749][    C2] RIP: 0033:0x7ff6dada7abd
[ 18.060752][ C2] Code: Unable to access opcode bytes at 0x7ff6dada7a93.

Code starting with the faulting instruction
===========================================
[   18.060753][    C2] RSP: 002b:00007fffbb7d4138 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   18.060756][    C2] RAX: ffffffffffffffda RBX: 00007ff6dae849c0 RCX: 00007ff6dada7abd
[   18.060758][    C2] RDX: 00000000000000e7 RSI: ffffffffffffff80 RDI: 0000000000000000
[   18.060760][    C2] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000020
[   18.060761][    C2] R10: 00007fffbb7d3fe0 R11: 0000000000000246 R12: 00007ff6dae849c0


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