======================================
| [   16.371825][    C3] 1 lock held by swapper/3/0:
| [ 16.372034][ C3] #0: ffffffffae3749c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) 
| [   16.372395][    C3]
| [   16.372395][    C3] stack backtrace:
[   16.372651][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.372653][    C3] Call Trace:
[   16.372656][    C3]  <IRQ>
[ 16.372658][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 16.372665][ C3] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) 
[ 16.372671][ C3] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) 
[ 16.372676][ C3] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 16.372682][ C3] ? save_trace (kernel/locking/lockdep.c:594) 
[ 16.372687][ C3] mark_lock (kernel/locking/lockdep.c:4754) 
[ 16.372692][ C3] mark_usage (kernel/locking/lockdep.c:4643) 
[ 16.372695][ C3] __lock_acquire (kernel/locking/lockdep.c:5189) 
[ 16.372701][ C3] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 16.372703][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 16.372707][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.372714][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 16.372716][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 16.372720][ C3] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 16.372723][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 16.372725][ C3] simple_pin_fs (fs/libfs.c:1066) 
[ 16.372729][ C3] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 16.372732][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 16.372738][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 16.372741][ 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:2366) 
[ 16.372748][ C3] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 16.372751][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 16.372754][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 16.372757][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 16.372762][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.372766][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 16.372769][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 16.372771][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 16.372773][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 16.372778][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 16.372781][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 16.372784][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 16.372790][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 16.372797][ C3] __put_net (net/core/net_namespace.c:732) 
[ 16.372801][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 16.372805][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 16.372808][ C3] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 16.372812][ C3] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 16.372816][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 16.372820][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 16.372824][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 16.372827][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 16.372832][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 16.372836][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 16.372841][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 16.372843][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 16.372846][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   16.372849][    C3]  </IRQ>
[   16.372851][    C3]  <TASK>
[ 16.372852][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.372855][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 16.372860][ C3] Code: 60 b8 00 e9 c3 57 02 00 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 c3 75 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:	60                   	(bad)
   1:	b8 00 e9 c3 57       	mov    $0x57c3e900,%eax
   6:	02 00                	add    (%rax),%al
   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 c3 75 13 00 	verw   0x1375c3(%rip)        # 0x1375eb
  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
[   16.372862][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000242
[   16.372866][    C3] RAX: 00000000000467f1 RBX: 1ffff9200002afc1 RCX: ffffffffad35ba19
[   16.372868][    C3] RDX: 0000000000000000 RSI: ffffffffade87785 RDI: ffffffffad651260
[   16.372870][    C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1005ef667a
[   16.372871][    C3] R10: ffff88802f7b33d3 R11: 0000000000000000 R12: 0000000000000000
[   16.372873][    C3] R13: ffff888001bf4640 R14: dffffc0000000000 R15: 0000000000000000
[ 16.372877][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 16.372882][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 16.372884][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 16.372886][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 16.372890][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 16.372895][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 16.372900][ C3] do_idle (kernel/sched/idle.c:325) 
[ 16.372904][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 16.372907][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 16.372911][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 16.372916][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   16.389536][    C3] RCU nest depth: 0, expected: 0
| [   16.389723][    C3] INFO: lockdep is turned off.
| [   16.389918][    C3] Preemption disabled at:
| [ 16.389920][ C3] 0x0 
[   16.390252][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.390254][    C3] Call Trace:
[   16.390256][    C3]  <IRQ>
[ 16.390258][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 16.390265][ C3] __might_resched (kernel/sched/core.c:8819) 
[ 16.390273][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 16.390277][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 16.390280][ C3] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 16.390285][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.390292][ 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) 
[ 16.390297][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 16.390300][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 16.390304][ 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) 
[ 16.390309][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 16.390312][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 16.390317][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 16.390320][ 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:2366) 
[ 16.390326][ C3] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 16.390330][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 16.390333][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 16.390336][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 16.390341][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.390344][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 16.390348][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 16.390350][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 16.390353][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 16.390358][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 16.390361][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 16.390364][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 16.390368][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 16.390374][ C3] __put_net (net/core/net_namespace.c:732) 
[ 16.390378][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 16.390382][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 16.390385][ C3] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 16.390388][ C3] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 16.390394][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 16.390398][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 16.390402][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 16.390406][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 16.390411][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 16.390415][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 16.390420][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 16.390423][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 16.390425][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   16.390429][    C3]  </IRQ>
[   16.390430][    C3]  <TASK>
[ 16.390432][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.390434][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 16.390438][ C3] Code: 60 b8 00 e9 c3 57 02 00 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 c3 75 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:	60                   	(bad)
   1:	b8 00 e9 c3 57       	mov    $0x57c3e900,%eax
   6:	02 00                	add    (%rax),%al
   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 c3 75 13 00 	verw   0x1375c3(%rip)        # 0x1375eb
  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
[   16.390441][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000242
[   16.390444][    C3] RAX: 00000000000467f1 RBX: 1ffff9200002afc1 RCX: ffffffffad35ba19
[   16.390446][    C3] RDX: 0000000000000000 RSI: ffffffffade87785 RDI: ffffffffad651260
[   16.390448][    C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1005ef667a
[   16.390450][    C3] R10: ffff88802f7b33d3 R11: 0000000000000000 R12: 0000000000000000
[   16.390452][    C3] R13: ffff888001bf4640 R14: dffffc0000000000 R15: 0000000000000000
[ 16.390456][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 16.390460][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 16.390463][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 16.390465][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 16.390469][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 16.390473][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 16.390478][ C3] do_idle (kernel/sched/idle.c:325) 
[ 16.390483][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 16.390486][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 16.390490][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 16.390495][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   18.727033][    C3] INFO: lockdep is turned off.
| [   18.727223][    C3] Preemption disabled at:
| [ 18.727225][ C3] 0x0 
| [   18.727575][    C3] Tainted: [W]=WARN
[   18.727576][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   18.727578][    C3] Call Trace:
[   18.727581][    C3]  <IRQ>
[ 18.727583][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 18.727593][ C3] __might_resched (kernel/sched/core.c:8819) 
[ 18.727601][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 18.727607][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 18.727610][ C3] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 18.727616][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 18.727624][ 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) 
[ 18.727631][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 18.727633][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 18.727640][ 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) 
[ 18.727645][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 18.727648][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 18.727654][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 18.727658][ 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:2366) 
[ 18.727665][ C3] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 18.727670][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 18.727673][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 18.727679][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 18.727684][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 18.727688][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 18.727692][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 18.727694][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 18.727697][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 18.727702][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 18.727706][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 18.727709][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 18.727715][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 18.727721][ C3] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 18.727726][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 18.727731][ C3] __put_net (net/core/net_namespace.c:732) 
[ 18.727736][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 18.727740][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 18.727743][ C3] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 18.727748][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 18.727753][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 18.727758][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 18.727762][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 18.727767][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 18.727770][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 18.727772][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   18.727776][    C3]  </IRQ>
[   18.727777][    C3]  <TASK>
[ 18.727778][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 18.727781][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 18.727785][ C3] Code: 60 b8 00 e9 c3 57 02 00 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 c3 75 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:	60                   	(bad)
   1:	b8 00 e9 c3 57       	mov    $0x57c3e900,%eax
   6:	02 00                	add    (%rax),%al
   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 c3 75 13 00 	verw   0x1375c3(%rip)        # 0x1375eb
  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
[   18.727789][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000246
[   18.727793][    C3] RAX: 0000000000000003 RBX: 1ffff9200002afc1 RCX: ffffffffad35ba19
[   18.727795][    C3] RDX: ffffed1005ef667b RSI: ffffffffad6511e0 RDI: ffffffffaab8633f
[   18.727797][    C3] RBP: 0000000000000000 R08: 0000000000000000 R09: ffffed1005ef667a
[   18.727799][    C3] R10: ffff88802f7b33d3 R11: ffff888001bdcb58 R12: 0000000000000000
[   18.727801][    C3] R13: ffff888001bf4640 R14: dffffc0000000000 R15: 0000000000000000
[ 18.727805][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 18.727808][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 18.727813][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 18.727815][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 18.727818][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 18.727821][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 18.727826][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 18.727831][ C3] do_idle (kernel/sched/idle.c:325) 
[ 18.727838][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 18.727841][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 18.727845][ 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