======================================
| [   14.285468][    C2] 1 lock held by swapper/2/0:
| [ 14.285660][ C2] #0: ffffffffa4374480 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) 
| [   14.285997][    C2]
| [   14.285997][    C2] stack backtrace:
[   14.286223][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   14.286226][    C2] Call Trace:
[   14.286228][    C2]  <IRQ>
[ 14.286230][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 14.286236][ C2] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) 
[ 14.286242][ C2] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) 
[ 14.286247][ C2] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 14.286253][ C2] ? save_trace (kernel/locking/lockdep.c:594) 
[ 14.286258][ C2] mark_lock (kernel/locking/lockdep.c:4754) 
[ 14.286262][ C2] mark_usage (kernel/locking/lockdep.c:4643) 
[ 14.286265][ C2] __lock_acquire (kernel/locking/lockdep.c:5189) 
[ 14.286270][ C2] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 14.286274][ C2] ? simple_pin_fs (fs/libfs.c:1066) 
[ 14.286279][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 14.286285][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 14.286288][ C2] ? simple_pin_fs (fs/libfs.c:1066) 
[ 14.286292][ C2] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 14.286296][ C2] ? simple_pin_fs (fs/libfs.c:1066) 
[ 14.286299][ C2] simple_pin_fs (fs/libfs.c:1066) 
[ 14.286303][ C2] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 14.286306][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 14.286312][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 14.286315][ 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) 
[ 14.286319][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.286323][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 14.286325][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 14.286328][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 14.286332][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.286335][ C2] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 14.286339][ C2] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 14.286341][ C2] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 14.286343][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 14.286349][ C2] ? do_idle (kernel/sched/idle.c:325) 
[ 14.286351][ C2] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 14.286354][ C2] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 14.286359][ C2] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 14.286365][ C2] __put_net (net/core/net_namespace.c:732) 
[ 14.286368][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 14.286372][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.286375][ C2] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.286379][ C2] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 14.286382][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 14.286386][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 14.286389][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 14.286393][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 14.286397][ C2] rcu_core (kernel/rcu/tree.c:2826) 
[ 14.286400][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 14.286405][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 14.286407][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 14.286409][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   14.286413][    C2]  </IRQ>
[   14.286414][    C2]  <TASK>
[ 14.286415][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.286418][ C2] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 14.286423][ 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
[   14.286426][    C2] RSP: 0000:ffffc90000147de8 EFLAGS: 00000246
[   14.286429][    C2] RAX: 0000000000042803 RBX: 1ffff92000028fc1 RCX: ffffffffa3355a19
[   14.286432][    C2] RDX: 0000000000000000 RSI: ffffffffa3e85f31 RDI: ffffffffa3650ce0
[   14.286434][    C2] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c2667a
[   14.286435][    C2] R10: ffff8880361333d3 R11: 0000000000000000 R12: 0000000000000000
[   14.286437][    C2] R13: ffff888001bb2340 R14: dffffc0000000000 R15: 0000000000000000
[ 14.286441][ C2] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 14.286446][ C2] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 14.286449][ C2] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 14.286451][ C2] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 14.286455][ C2] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 14.286459][ C2] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 14.286463][ C2] do_idle (kernel/sched/idle.c:325) 
[ 14.286467][ C2] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 14.286471][ C2] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 14.286474][ C2] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 14.286479][ C2] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   14.302470][    C2] RCU nest depth: 0, expected: 0
| [   14.302655][    C2] INFO: lockdep is turned off.
| [   14.302973][    C2] Preemption disabled at:
| [ 14.302975][ C2] 0x0 
[   14.303313][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   14.303315][    C2] Call Trace:
[   14.303317][    C2]  <IRQ>
[ 14.303319][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 14.303326][ C2] __might_resched (kernel/sched/core.c:8819) 
[ 14.303332][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 14.303335][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 14.303338][ C2] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 14.303342][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 14.303348][ 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) 
[ 14.303352][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 14.303354][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 14.303358][ 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) 
[ 14.303362][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 14.303365][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 14.303370][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 14.303373][ 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) 
[ 14.303378][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.303382][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 14.303385][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 14.303389][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 14.303393][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.303397][ C2] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 14.303400][ C2] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 14.303402][ C2] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 14.303405][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 14.303409][ C2] ? do_idle (kernel/sched/idle.c:325) 
[ 14.303412][ C2] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 14.303415][ C2] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 14.303419][ C2] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 14.303425][ C2] __put_net (net/core/net_namespace.c:732) 
[ 14.303428][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 14.303432][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.303435][ C2] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.303439][ C2] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 14.303443][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 14.303447][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 14.303451][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 14.303454][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 14.303459][ C2] rcu_core (kernel/rcu/tree.c:2826) 
[ 14.303462][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 14.303467][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 14.303469][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 14.303472][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   14.303475][    C2]  </IRQ>
[   14.303476][    C2]  <TASK>
[ 14.303477][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.303480][ C2] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 14.303484][ 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
[   14.303486][    C2] RSP: 0000:ffffc90000147de8 EFLAGS: 00000246
[   14.303489][    C2] RAX: 0000000000042803 RBX: 1ffff92000028fc1 RCX: ffffffffa3355a19
[   14.303492][    C2] RDX: 0000000000000000 RSI: ffffffffa3e85f31 RDI: ffffffffa3650ce0
[   14.303493][    C2] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c2667a
[   14.303495][    C2] R10: ffff8880361333d3 R11: 0000000000000000 R12: 0000000000000000
[   14.303497][    C2] R13: ffff888001bb2340 R14: dffffc0000000000 R15: 0000000000000000
[ 14.303500][ C2] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 14.303506][ C2] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 14.303508][ C2] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 14.303511][ C2] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 14.303514][ C2] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 14.303518][ C2] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 14.303523][ C2] do_idle (kernel/sched/idle.c:325) 
[ 14.303527][ C2] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 14.303531][ C2] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 14.303534][ C2] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 14.303539][ C2] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   15.824371][    C3] INFO: lockdep is turned off.
| [   15.824541][    C3] Preemption disabled at:
| [ 15.824543][ C3] 0x0 
| [   15.824848][    C3] Tainted: [W]=WARN
[   15.824850][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.824854][    C3] Call Trace:
[   15.824856][    C3]  <IRQ>
[ 15.824858][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.824866][ C3] __might_resched (kernel/sched/core.c:8819) 
[ 15.824872][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 15.824876][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 15.824878][ C3] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 15.824883][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 15.824889][ 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) 
[ 15.824893][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 15.824896][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 15.824900][ 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) 
[ 15.824904][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 15.824907][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 15.824912][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 15.824915][ 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) 
[ 15.824921][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.824925][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 15.824928][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.824932][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 15.824937][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.824940][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.824943][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.824945][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.824948][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.824952][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 15.824955][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.824959][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.824963][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 15.824967][ C3] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 15.824971][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 15.824976][ C3] __put_net (net/core/net_namespace.c:732) 
[ 15.824979][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 15.824983][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.824986][ C3] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.824991][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 15.824995][ C3] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 15.824999][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.825005][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 15.825008][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 15.825013][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.825015][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.825017][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   15.825021][    C3]  </IRQ>
[   15.825022][    C3]  <TASK>
[ 15.825023][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.825026][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.825030][ 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
[   15.825033][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000246
[   15.825036][    C3] RAX: 0000000000000003 RBX: 1ffff9200002afc1 RCX: ffffffffa3355a19
[   15.825038][    C3] RDX: ffffed1006c3667b RSI: ffffffffa3650c60 RDI: ffffffffa0b84d8f
[   15.825040][    C3] RBP: 0000000000000000 R08: 0000000000000000 R09: ffffed1006c3667a
[   15.825042][    C3] R10: ffff8880361b33d3 R11: ffff888001d70558 R12: 0000000000000000
[   15.825044][    C3] R13: ffff888001bb4640 R14: dffffc0000000000 R15: 0000000000000000
[ 15.825048][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 15.825052][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.825056][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.825058][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.825061][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.825065][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 15.825069][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 15.825074][ C3] do_idle (kernel/sched/idle.c:325) 
[ 15.825078][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.825081][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.825085][ C3] ? __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