======================================
| [   19.256886][    C2] 1 lock held by swapper/2/0:
| [ 19.257177][ C2] #0: ffffffffa7174480 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) 
| [   19.257683][    C2]
| [   19.257683][    C2] stack backtrace:
[   19.258041][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   19.258044][    C2] Call Trace:
[   19.258047][    C2]  <IRQ>
[ 19.258050][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 19.258059][ C2] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) 
[ 19.258068][ C2] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) 
[ 19.258075][ C2] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 19.258083][ C2] ? save_trace (kernel/locking/lockdep.c:594) 
[ 19.258089][ C2] mark_lock (kernel/locking/lockdep.c:4754) 
[ 19.258096][ C2] mark_usage (kernel/locking/lockdep.c:4643) 
[ 19.258101][ C2] __lock_acquire (kernel/locking/lockdep.c:5189) 
[ 19.258109][ C2] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 19.258114][ C2] ? simple_pin_fs (fs/libfs.c:1066) 
[ 19.258122][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 19.258129][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 19.258134][ C2] ? simple_pin_fs (fs/libfs.c:1066) 
[ 19.258141][ C2] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 19.258146][ C2] ? simple_pin_fs (fs/libfs.c:1066) 
[ 19.258151][ C2] simple_pin_fs (fs/libfs.c:1066) 
[ 19.258157][ C2] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 19.258162][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 19.258168][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 19.258173][ 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) 
[ 19.258180][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 19.258185][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 19.258189][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 19.258194][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 19.258200][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 19.258205][ C2] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 19.258209][ C2] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 19.258213][ C2] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 19.258216][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 19.258222][ C2] ? do_idle (kernel/sched/idle.c:325) 
[ 19.258226][ C2] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 19.258231][ C2] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 19.258237][ C2] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 19.258246][ C2] __put_net (net/core/net_namespace.c:732) 
[ 19.258251][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 19.258256][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 19.258261][ C2] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 19.258266][ C2] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 19.258272][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 19.258278][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 19.258284][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 19.258289][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 19.258296][ C2] rcu_core (kernel/rcu/tree.c:2826) 
[ 19.258302][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 19.258310][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 19.258314][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 19.258318][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   19.258323][    C2]  </IRQ>
[   19.258326][    C2]  <TASK>
[ 19.258328][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 19.258333][ C2] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 19.258338][ 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
[   19.258343][    C2] RSP: 0018:ffffc90000147de8 EFLAGS: 00000242
[   19.258348][    C2] RAX: 000000000004b70b RBX: 1ffff92000028fc1 RCX: ffffffffa6155a19
[   19.258352][    C2] RDX: 0000000000000000 RSI: ffffffffa6c85f31 RDI: ffffffffa6450ce0
[   19.258355][    C2] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c2667a
[   19.258357][    C2] R10: ffff8880361333d3 R11: 0000000000000000 R12: 0000000000000000
[   19.258360][    C2] R13: ffff888001bb2340 R14: dffffc0000000000 R15: 0000000000000000
[ 19.258367][ C2] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 19.258376][ C2] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 19.258379][ C2] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 19.258383][ C2] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 19.258389][ C2] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 19.258396][ C2] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 19.258403][ C2] do_idle (kernel/sched/idle.c:325) 
[ 19.258410][ C2] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 19.258416][ C2] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 19.258421][ C2] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 19.258429][ C2] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   19.282305][    C2] RCU nest depth: 0, expected: 0
| [   19.282484][    C2] INFO: lockdep is turned off.
| [   19.282668][    C2] Preemption disabled at:
| [ 19.282670][ C2] 0x0 
[   19.283104][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   19.283106][    C2] Call Trace:
[   19.283108][    C2]  <IRQ>
[ 19.283110][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 19.283117][ C2] __might_resched (kernel/sched/core.c:8819) 
[ 19.283124][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 19.283128][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 19.283130][ C2] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 19.283135][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 19.283141][ 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) 
[ 19.283146][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 19.283148][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 19.283152][ 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) 
[ 19.283156][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 19.283159][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 19.283165][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 19.283168][ 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) 
[ 19.283173][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 19.283177][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 19.283180][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 19.283184][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 19.283188][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 19.283192][ C2] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 19.283195][ C2] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 19.283197][ C2] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 19.283200][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 19.283204][ C2] ? do_idle (kernel/sched/idle.c:325) 
[ 19.283207][ C2] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 19.283210][ C2] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 19.283215][ C2] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 19.283221][ C2] __put_net (net/core/net_namespace.c:732) 
[ 19.283224][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 19.283228][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 19.283231][ C2] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 19.283235][ C2] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 19.283240][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 19.283244][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 19.283248][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 19.283252][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 19.283257][ C2] rcu_core (kernel/rcu/tree.c:2826) 
[ 19.283260][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 19.283265][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 19.283267][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 19.283271][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   19.283275][    C2]  </IRQ>
[   19.283276][    C2]  <TASK>
[ 19.283277][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 19.283280][ C2] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 19.283284][ 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
[   19.283286][    C2] RSP: 0018:ffffc90000147de8 EFLAGS: 00000242
[   19.283290][    C2] RAX: 000000000004b70b RBX: 1ffff92000028fc1 RCX: ffffffffa6155a19
[   19.283292][    C2] RDX: 0000000000000000 RSI: ffffffffa6c85f31 RDI: ffffffffa6450ce0
[   19.283294][    C2] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c2667a
[   19.283295][    C2] R10: ffff8880361333d3 R11: 0000000000000000 R12: 0000000000000000
[   19.283297][    C2] R13: ffff888001bb2340 R14: dffffc0000000000 R15: 0000000000000000
[ 19.283301][ C2] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 19.283306][ C2] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 19.283309][ C2] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 19.283311][ C2] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 19.283315][ C2] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 19.283319][ C2] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 19.283324][ C2] do_idle (kernel/sched/idle.c:325) 
[ 19.283328][ C2] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 19.283331][ C2] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 19.283335][ C2] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 19.283340][ C2] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   24.037864][    C3] INFO: lockdep is turned off.
| [   24.038102][    C3] Preemption disabled at:
| [ 24.038104][ C3] 0x0 
| [   24.038485][    C3] Tainted: [W]=WARN
[   24.038487][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   24.038489][    C3] Call Trace:
[   24.038490][    C3]  <IRQ>
[ 24.038493][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 24.038501][ C3] __might_resched (kernel/sched/core.c:8819) 
[ 24.038507][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 24.038511][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 24.038514][ C3] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 24.038519][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 24.038525][ 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) 
[ 24.038529][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 24.038532][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 24.038536][ 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) 
[ 24.038540][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 24.038543][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 24.038548][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 24.038551][ 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) 
[ 24.038557][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 24.038562][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 24.038564][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 24.038568][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 24.038573][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 24.038576][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 24.038579][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 24.038582][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 24.038584][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 24.038589][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 24.038592][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 24.038595][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 24.038599][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 24.038604][ C3] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 24.038608][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 24.038613][ C3] __put_net (net/core/net_namespace.c:732) 
[ 24.038616][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 24.038619][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 24.038622][ C3] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 24.038628][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 24.038632][ C3] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 24.038637][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 24.038642][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 24.038645][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 24.038650][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 24.038653][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 24.038655][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   24.038658][    C3]  </IRQ>
[   24.038659][    C3]  <TASK>
[ 24.038661][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 24.038663][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 24.038667][ 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
[   24.038670][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000246
[   24.038674][    C3] RAX: 0000000000000003 RBX: 1ffff9200002afc1 RCX: ffffffffa6155a19
[   24.038676][    C3] RDX: ffffed1006c3667b RSI: ffffffffa6450c60 RDI: ffffffffa3984d8f
[   24.038678][    C3] RBP: 0000000000000000 R08: 0000000000000000 R09: ffffed1006c3667a
[   24.038680][    C3] R10: ffff8880361b33d3 R11: ffffc900001579d8 R12: 0000000000000000
[   24.038681][    C3] R13: ffff888001bb4640 R14: dffffc0000000000 R15: 0000000000000000
[ 24.038685][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 24.038689][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 24.038693][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 24.038696][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 24.038698][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 24.038702][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 24.038706][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 24.038711][ C3] do_idle (kernel/sched/idle.c:325) 
[ 24.038715][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 24.038718][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 24.038722][ 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