======================================
| [   14.161614][    C3] 1 lock held by swapper/3/0:
| [ 14.161795][ C3] #0: ffffffff8e174480 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) 
| [   14.162121][    C3]
| [   14.162121][    C3] stack backtrace:
[   14.162351][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   14.162353][    C3] Call Trace:
[   14.162355][    C3]  <IRQ>
[ 14.162357][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 14.162365][ C3] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) 
[ 14.162370][ C3] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) 
[ 14.162375][ C3] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 14.162382][ C3] ? save_trace (kernel/locking/lockdep.c:594) 
[ 14.162386][ C3] mark_lock (kernel/locking/lockdep.c:4754) 
[ 14.162390][ C3] mark_usage (kernel/locking/lockdep.c:4643) 
[ 14.162394][ C3] __lock_acquire (kernel/locking/lockdep.c:5189) 
[ 14.162399][ C3] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 14.162403][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 14.162407][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 14.162414][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 14.162417][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 14.162421][ C3] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 14.162424][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 14.162427][ C3] simple_pin_fs (fs/libfs.c:1066) 
[ 14.162431][ C3] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 14.162434][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 14.162440][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 14.162443][ C3] ? __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) 
[ 14.162451][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.162454][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 14.162457][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 14.162459][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 14.162465][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.162469][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 14.162472][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 14.162474][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 14.162476][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 14.162480][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 14.162483][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 14.162486][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 14.162491][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 14.162498][ C3] __put_net (net/core/net_namespace.c:732) 
[ 14.162502][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 14.162506][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.162509][ C3] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.162513][ C3] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 14.162517][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 14.162520][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 14.162524][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 14.162527][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 14.162532][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 14.162535][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 14.162539][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 14.162542][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 14.162544][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   14.162547][    C3]  </IRQ>
[   14.162548][    C3]  <TASK>
[ 14.162550][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.162553][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 14.162557][ C3] 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
[   14.162561][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000242
[   14.162564][    C3] RAX: 0000000000037a15 RBX: 1ffff9200002afc1 RCX: ffffffff8d155a19
[   14.162566][    C3] RDX: 0000000000000000 RSI: ffffffff8dc85f31 RDI: ffffffff8d450ce0
[   14.162568][    C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c3667a
[   14.162570][    C3] R10: ffff8880361b33d3 R11: 0000000000000000 R12: 0000000000000000
[   14.162571][    C3] R13: ffff888001bb4640 R14: dffffc0000000000 R15: 0000000000000000
[ 14.162575][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 14.162581][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 14.162583][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 14.162585][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 14.162589][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 14.162593][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 14.162598][ C3] do_idle (kernel/sched/idle.c:325) 
[ 14.162601][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 14.162605][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 14.162608][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 14.162613][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   14.177576][    C3] RCU nest depth: 0, expected: 0
| [   14.177759][    C3] INFO: lockdep is turned off.
| [   14.177929][    C3] Preemption disabled at:
| [ 14.177930][ C3] 0x0 
[   14.178231][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   14.178233][    C3] Call Trace:
[   14.178234][    C3]  <IRQ>
[ 14.178236][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 14.178243][ C3] __might_resched (kernel/sched/core.c:8819) 
[ 14.178249][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 14.178253][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 14.178255][ C3] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 14.178260][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 14.178265][ C3] ? 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) 
[ 14.178270][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 14.178273][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 14.178277][ C3] ? 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) 
[ 14.178281][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 14.178284][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 14.178289][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 14.178292][ C3] ? __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) 
[ 14.178297][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.178301][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 14.178304][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 14.178308][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 14.178312][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.178315][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 14.178318][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 14.178320][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 14.178323][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 14.178327][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 14.178330][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 14.178333][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 14.178338][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 14.178344][ C3] __put_net (net/core/net_namespace.c:732) 
[ 14.178347][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 14.178350][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.178353][ C3] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.178357][ C3] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 14.178361][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 14.178365][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 14.178369][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 14.178373][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 14.178377][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 14.178381][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 14.178385][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 14.178388][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 14.178390][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   14.178393][    C3]  </IRQ>
[   14.178394][    C3]  <TASK>
[ 14.178396][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.178399][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 14.178402][ C3] 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
[   14.178404][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000242
[   14.178407][    C3] RAX: 0000000000037a15 RBX: 1ffff9200002afc1 RCX: ffffffff8d155a19
[   14.178409][    C3] RDX: 0000000000000000 RSI: ffffffff8dc85f31 RDI: ffffffff8d450ce0
[   14.178411][    C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c3667a
[   14.178413][    C3] R10: ffff8880361b33d3 R11: 0000000000000000 R12: 0000000000000000
[   14.178415][    C3] R13: ffff888001bb4640 R14: dffffc0000000000 R15: 0000000000000000
[ 14.178418][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 14.178424][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 14.178426][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 14.178428][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 14.178432][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 14.178436][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 14.178441][ C3] do_idle (kernel/sched/idle.c:325) 
[ 14.178445][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 14.178448][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 14.178452][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 14.178457][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   15.775956][    C1] INFO: lockdep is turned off.
| [   15.776137][    C1] Preemption disabled at:
| [ 15.776139][ C1] 0x0 
| [   15.776507][    C1] Tainted: [W]=WARN
[   15.776508][    C1] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.776510][    C1] Call Trace:
[   15.776513][    C1]  <IRQ>
[ 15.776515][ C1] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.776527][ C1] __might_resched (kernel/sched/core.c:8819) 
[ 15.776535][ C1] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 15.776540][ C1] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 15.776543][ C1] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 15.776549][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 15.776558][ C1] ? 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) 
[ 15.776564][ C1] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 15.776567][ C1] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 15.776572][ C1] ? 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) 
[ 15.776576][ C1] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 15.776579][ C1] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 15.776586][ C1] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 15.776589][ C1] ? __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) 
[ 15.776596][ C1] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.776602][ C1] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 15.776605][ C1] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.776610][ C1] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 15.776616][ C1] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.776621][ C1] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.776624][ C1] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.776626][ C1] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.776629][ C1] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.776635][ C1] ? do_idle (kernel/sched/idle.c:325) 
[ 15.776638][ C1] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.776641][ C1] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.776648][ C1] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 15.776654][ C1] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 15.776658][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 15.776663][ C1] __put_net (net/core/net_namespace.c:732) 
[ 15.776666][ C1] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 15.776670][ C1] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.776673][ C1] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.776678][ C1] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 15.776682][ C1] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 15.776687][ C1] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.776693][ C1] rcu_core (kernel/rcu/tree.c:2826) 
[ 15.776697][ C1] handle_softirqs (kernel/softirq.c:579) 
[ 15.776702][ C1] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.776704][ C1] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.776706][ C1] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   15.776709][    C1]  </IRQ>
[   15.776710][    C1]  <TASK>
[ 15.776712][ C1] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.776715][ C1] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.776719][ C1] 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
[   15.776721][    C1] RSP: 0018:ffffc90000137de8 EFLAGS: 00000246
[   15.776725][    C1] RAX: 0000000000000001 RBX: 1ffff92000026fc1 RCX: ffffffff8d155a19
[   15.776727][    C1] RDX: ffffed1006c1667b RSI: ffffffff8d450c60 RDI: ffffffff8a984d8f
[   15.776729][    C1] RBP: 0000000000000000 R08: 0000000000000000 R09: ffffed1006c1667a
[   15.776731][    C1] R10: ffff8880360b33d3 R11: ffff888008fa0558 R12: 0000000000000000
[   15.776733][    C1] R13: ffff888001bb0040 R14: dffffc0000000000 R15: 0000000000000000
[ 15.776737][ C1] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 15.776741][ C1] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.776745][ C1] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.776747][ C1] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.776753][ C1] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.776756][ C1] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 15.776760][ C1] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 15.776765][ C1] do_idle (kernel/sched/idle.c:325) 
[ 15.776769][ C1] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.776773][ C1] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.776776][ C1] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 


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