======================================
| [   17.356702][    C2] 1 lock held by swapper/2/0:
| [ 17.356886][ C2] #0: ffffffffaf574480 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) 
| [   17.357220][    C2]
| [   17.357220][    C2] stack backtrace:
[   17.357460][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   17.357462][    C2] Call Trace:
[   17.357464][    C2]  <IRQ>
[ 17.357466][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 17.357472][ C2] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) 
[ 17.357477][ C2] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) 
[ 17.357482][ C2] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 17.357487][ C2] ? save_trace (kernel/locking/lockdep.c:594) 
[ 17.357491][ C2] mark_lock (kernel/locking/lockdep.c:4754) 
[ 17.357495][ C2] mark_usage (kernel/locking/lockdep.c:4643) 
[ 17.357499][ C2] __lock_acquire (kernel/locking/lockdep.c:5189) 
[ 17.357504][ C2] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 17.357508][ C2] ? simple_pin_fs (fs/libfs.c:1066) 
[ 17.357512][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.357517][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 17.357521][ C2] ? simple_pin_fs (fs/libfs.c:1066) 
[ 17.357525][ C2] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 17.357528][ C2] ? simple_pin_fs (fs/libfs.c:1066) 
[ 17.357531][ C2] simple_pin_fs (fs/libfs.c:1066) 
[ 17.357535][ C2] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 17.357538][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 17.357544][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 17.357547][ 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:2333) 
[ 17.357552][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 17.357555][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 17.357558][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 17.357560][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 17.357565][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.357569][ C2] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 17.357572][ C2] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 17.357574][ C2] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.357576][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.357580][ C2] ? do_idle (kernel/sched/idle.c:325) 
[ 17.357583][ C2] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.357586][ C2] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 17.357589][ C2] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 17.357596][ C2] __put_net (net/core/net_namespace.c:732) 
[ 17.357599][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 17.357603][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 17.357606][ C2] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 17.357610][ C2] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 17.357614][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 17.357617][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 17.357621][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 17.357624][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 17.357629][ C2] rcu_core (kernel/rcu/tree.c:2826) 
[ 17.357632][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 17.357636][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 17.357639][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 17.357641][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   17.357645][    C2]  </IRQ>
[   17.357646][    C2]  <TASK>
[ 17.357647][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.357650][ C2] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 17.357654][ C2] Code: b0 b8 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 d0 13 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:	b0 b8                	mov    $0xb8,%al
   2:	00 c3                	add    %al,%bl
   4:	cc                   	int3
   5:	cc                   	int3
   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 d0 13 00 	verw   0x13d0a3(%rip)        # 0x13d0cb
  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
[   17.357657][    C2] RSP: 0018:ffffc90000147de8 EFLAGS: 00000242
[   17.357660][    C2] RAX: 000000000003d275 RBX: 1ffff92000028fc1 RCX: ffffffffae555a19
[   17.357663][    C2] RDX: 0000000000000000 RSI: ffffffffaf085f31 RDI: ffffffffae850ce0
[   17.357664][    C2] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c2667a
[   17.357666][    C2] R10: ffff8880361333d3 R11: 0000000000000000 R12: 0000000000000000
[   17.357668][    C2] R13: ffff888001bb2340 R14: dffffc0000000000 R15: 0000000000000000
[ 17.357672][ C2] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 17.357677][ C2] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 17.357680][ C2] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.357682][ C2] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.357685][ C2] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 17.357690][ C2] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 17.357694][ C2] do_idle (kernel/sched/idle.c:325) 
[ 17.357698][ C2] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.357702][ C2] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 17.357705][ C2] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 17.357710][ C2] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   17.372605][    C2] RCU nest depth: 0, expected: 0
| [   17.372784][    C2] INFO: lockdep is turned off.
| [   17.372995][    C2] Preemption disabled at:
| [ 17.372997][ C2] 0x0 
[   17.373344][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   17.373346][    C2] Call Trace:
[   17.373348][    C2]  <IRQ>
[ 17.373350][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 17.373358][ C2] __might_resched (kernel/sched/core.c:8819) 
[ 17.373363][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 17.373367][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 17.373370][ C2] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 17.373374][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.373381][ 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) 
[ 17.373385][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 17.373388][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 17.373392][ 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) 
[ 17.373396][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 17.373399][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 17.373404][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 17.373407][ 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:2333) 
[ 17.373412][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 17.373416][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 17.373419][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 17.373422][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 17.373426][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.373430][ C2] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 17.373433][ C2] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 17.373436][ C2] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.373438][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.373443][ C2] ? do_idle (kernel/sched/idle.c:325) 
[ 17.373445][ C2] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.373448][ C2] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 17.373453][ C2] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 17.373459][ C2] __put_net (net/core/net_namespace.c:732) 
[ 17.373462][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 17.373466][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 17.373469][ C2] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 17.373473][ C2] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 17.373477][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 17.373481][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 17.373485][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 17.373489][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 17.373493][ C2] rcu_core (kernel/rcu/tree.c:2826) 
[ 17.373497][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 17.373501][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 17.373504][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 17.373506][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   17.373509][    C2]  </IRQ>
[   17.373510][    C2]  <TASK>
[ 17.373512][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.373514][ C2] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 17.373518][ C2] Code: b0 b8 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 d0 13 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:	b0 b8                	mov    $0xb8,%al
   2:	00 c3                	add    %al,%bl
   4:	cc                   	int3
   5:	cc                   	int3
   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 d0 13 00 	verw   0x13d0a3(%rip)        # 0x13d0cb
  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
[   17.373521][    C2] RSP: 0018:ffffc90000147de8 EFLAGS: 00000242
[   17.373524][    C2] RAX: 000000000003d275 RBX: 1ffff92000028fc1 RCX: ffffffffae555a19
[   17.373526][    C2] RDX: 0000000000000000 RSI: ffffffffaf085f31 RDI: ffffffffae850ce0
[   17.373528][    C2] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c2667a
[   17.373530][    C2] R10: ffff8880361333d3 R11: 0000000000000000 R12: 0000000000000000
[   17.373531][    C2] R13: ffff888001bb2340 R14: dffffc0000000000 R15: 0000000000000000
[ 17.373535][ C2] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 17.373540][ C2] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 17.373543][ C2] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.373545][ C2] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.373548][ C2] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 17.373553][ C2] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 17.373557][ C2] do_idle (kernel/sched/idle.c:325) 
[ 17.373561][ C2] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.373565][ C2] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 17.373569][ C2] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 17.373574][ C2] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   19.815252][    C0] INFO: lockdep is turned off.
| [   19.815474][    C0] Preemption disabled at:
| [ 19.815477][ C0] handle_softirqs (kernel/softirq.c:553) 
| [   19.815937][    C0] Tainted: [W]=WARN
[   19.815938][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   19.815941][    C0] Call Trace:
[   19.815943][    C0]  <IRQ>
[ 19.815945][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 19.815954][ C0] __might_resched (kernel/sched/core.c:8819) 
[ 19.815962][ C0] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 19.815966][ C0] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 19.815969][ C0] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 19.815975][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 19.815983][ 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) 
[ 19.815989][ C0] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 19.815991][ C0] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 19.815997][ 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) 
[ 19.816001][ C0] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 19.816004][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 19.816010][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 19.816013][ 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) 
[ 19.816021][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 19.816026][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 19.816029][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 19.816031][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 19.816038][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 19.816042][ C0] ? __orc_find (arch/x86/kernel/unwind_orc.c:80 arch/x86/kernel/unwind_orc.c:102) 
[ 19.816048][ C0] ? unwind_next_frame (arch/x86/kernel/unwind_orc.c:495) 
[ 19.816052][ C0] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 19.816057][ C0] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 19.816062][ C0] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 19.816068][ C0] ? kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 19.816071][ C0] ? kasan_save_free_info (mm/kasan/generic.c:579) 
[ 19.816075][ C0] ? __kasan_slab_free (mm/kasan/common.c:271) 
[ 19.816079][ C0] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 19.816084][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 19.816089][ C0] __put_net (net/core/net_namespace.c:732) 
[ 19.816093][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 19.816096][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 19.816100][ C0] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 19.816105][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 19.816109][ C0] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 19.816115][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 19.816120][ C0] rcu_core (kernel/rcu/tree.c:2826) 
[ 19.816124][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 19.816128][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 19.816131][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 19.816133][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   19.816137][    C0]  </IRQ>
[   19.816138][    C0]  <TASK>
[ 19.816139][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 19.816142][ C0] RIP: 0010:__orc_find (arch/x86/kernel/unwind_orc.c:80 arch/x86/kernel/unwind_orc.c:102) 
[ 19.816146][ C0] Code: e5 77 4e 4c 89 e2 48 29 ea 48 89 d6 48 c1 ea 3f 48 c1 fe 02 48 01 f2 48 d1 fa 48 8d 5c 95 00 48 89 da 48 c1 ea 03 0f b6 34 0a <48> 89 da 83 e2 07 83 c2 03 40 38 f2 7c 05 40 84 f6 75 4b 48 63 13
All code
========
   0:	e5 77                	in     $0x77,%eax
   2:	4e                   	rex.WRX
   3:	4c 89 e2             	mov    %r12,%rdx
   6:	48 29 ea             	sub    %rbp,%rdx
   9:	48 89 d6             	mov    %rdx,%rsi
   c:	48 c1 ea 3f          	shr    $0x3f,%rdx
  10:	48 c1 fe 02          	sar    $0x2,%rsi
  14:	48 01 f2             	add    %rsi,%rdx
  17:	48 d1 fa             	sar    $1,%rdx
  1a:	48 8d 5c 95 00       	lea    0x0(%rbp,%rdx,4),%rbx
  1f:	48 89 da             	mov    %rbx,%rdx
  22:	48 c1 ea 03          	shr    $0x3,%rdx
  26:	0f b6 34 0a          	movzbl (%rdx,%rcx,1),%esi
  2a:*	48 89 da             	mov    %rbx,%rdx		<-- trapping instruction
  2d:	83 e2 07             	and    $0x7,%edx
  30:	83 c2 03             	add    $0x3,%edx
  33:	40 38 f2             	cmp    %sil,%dl
  36:	7c 05                	jl     0x3d
  38:	40 84 f6             	test   %sil,%sil
  3b:	75 4b                	jne    0x88
  3d:	48 63 13             	movslq (%rbx),%rdx

Code starting with the faulting instruction
===========================================
   0:	48 89 da             	mov    %rbx,%rdx
   3:	83 e2 07             	and    $0x7,%edx
   6:	83 c2 03             	add    $0x3,%edx
   9:	40 38 f2             	cmp    %sil,%dl
   c:	7c 05                	jl     0x13
   e:	40 84 f6             	test   %sil,%sil
  11:	75 4b                	jne    0x5e
  13:	48 63 13             	movslq (%rbx),%rdx
[   19.816149][    C0] RSP: 0018:ffffc90000a37808 EFLAGS: 00000a07
[   19.816153][    C0] RAX: ffffffffb04d4156 RBX: ffffffffb0134d64 RCX: dffffc0000000000
[   19.816156][    C0] RDX: 1ffffffff60269ac RSI: 0000000000000000 RDI: ffffffffb0134d60
[   19.816157][    C0] RBP: ffffffffb0134d64 R08: 0000000000000000 R09: ffffc90000a37989
[   19.816159][    C0] R10: ffffffffabc0b397 R11: ffffc90000a37988 R12: ffffffffb0134d64
[   19.816161][    C0] R13: ffffffffac810ca3 R14: ffffffffb0134d60 R15: ffffffffb0134d60
[ 19.816163][ C0] ? fuse_release (fs/fuse/file.c:364 fs/fuse/file.c:379) 
[ 19.816169][ C0] ? 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) 
[ 19.816176][ C0] unwind_next_frame (arch/x86/kernel/unwind_orc.c:495) 
[ 19.816180][ C0] ? fuse_release (fs/fuse/file.c:383) 
[ 19.816184][ C0] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 19.816189][ C0] ? fuse_release (fs/fuse/file.c:383) 
[ 19.816192][ C0] ? kernel_text_address (kernel/extable.c:99) 
[ 19.816199][ C0] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 19.816203][ C0] arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 19.816207][ C0] ? fuse_release (fs/fuse/file.c:383) 
[ 19.816212][ C0] stack_trace_save (kernel/stacktrace.c:123) 
[ 19.816215][ C0] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 19.816220][ C0] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 19.816223][ C0] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 19.816226][ C0] kasan_save_stack (mm/kasan/common.c:48) 
[ 19.816229][ C0] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 19.816232][ C0] ? kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 19.816234][ C0] ? kasan_save_free_info (mm/kasan/generic.c:579) 
[ 19.816237][ C0] ? __kasan_slab_free (mm/kasan/common.c:271) 
[ 19.816240][ C0] ? kfree (mm/slub.c:4642 mm/slub.c:4841) 
[ 19.816245][ C0] ? fuse_file_put (fs/fuse/file.c:124) 
[ 19.816248][ C0] ? fuse_release (fs/fuse/file.c:383) 
[ 19.816251][ C0] ? x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 19.816257][ C0] ? do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 19.816263][ C0] ? do_raw_spin_lock (./arch/x86/include/asm/atomic.h:107 ./include/linux/atomic/atomic-arch-fallback.h:2170 ./include/linux/atomic/atomic-instrumented.h:1302 ./include/asm-generic/qspinlock.h:111 kernel/locking/spinlock_debug.c:116) 
[ 19.816267][ C0] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 19.816270][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 19.816274][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 19.816277][ C0] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 19.816280][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 19.816284][ C0] ? __debug_check_no_obj_freed (lib/debugobjects.c:1110) 
[ 19.816293][ C0] ? __pfx___debug_check_no_obj_freed (lib/debugobjects.c:1070) 
[ 19.816297][ C0] ? trace_rcu_segcb_stats (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736 ./include/trace/events/rcu.h:537) 
[ 19.816301][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 19.816305][ C0] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 19.816308][ C0] kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 19.816311][ C0] kasan_save_free_info (mm/kasan/generic.c:579) 
[ 19.816314][ C0] __kasan_slab_free (mm/kasan/common.c:271) 
[ 19.816318][ C0] kfree (mm/slub.c:4642 mm/slub.c:4841) 
[ 19.816321][ C0] ? fuse_file_put (fs/fuse/file.c:124) 
[ 19.816325][ C0] fuse_file_put (fs/fuse/file.c:124) 
[ 19.816329][ C0] fuse_release (fs/fuse/file.c:383) 
[ 19.816334][ C0] __fput (fs/file_table.c:465) 
[ 19.816341][ C0] task_work_run (kernel/task_work.c:227 (discriminator 1)) 
[ 19.816345][ C0] ? __pfx_task_work_run (kernel/task_work.c:195) 
[ 19.816349][ 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) 
[ 19.816353][ C0] do_exit (kernel/exit.c:954) 
[ 19.816360][ C0] do_group_exit (kernel/exit.c:1083) 
[ 19.816363][ C0] __x64_sys_exit_group (kernel/exit.c:1111) 
[ 19.816367][ C0] x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 19.816370][ C0] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 19.816373][ C0] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   19.816376][    C0] RIP: 0033:0x7f592308aabd
[ 19.816380][ C0] Code: Unable to access opcode bytes at 0x7f592308aa93.

Code starting with the faulting instruction
===========================================
[   19.816381][    C0] RSP: 002b:00007ffefa5e5218 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   19.816384][    C0] RAX: ffffffffffffffda RBX: 00007f59231679c0 RCX: 00007f592308aabd
[   19.816386][    C0] RDX: 00000000000000e7 RSI: ffffffffffffff80 RDI: 0000000000000000
[   19.816388][    C0] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000020
[   19.816389][    C0] R10: 00007ffefa5e50c0 R11: 0000000000000246 R12: 00007f59231679c0


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
handle_softirqs:dump_stack_lvl:__might_resched:down_write:simple_recursive_removal