======================================
| [   18.260878][    C3] 1 lock held by swapper/3/0:
| [ 18.261055][ C3] #0: ffffffffb7f74480 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) 
| [   18.261374][    C3]
| [   18.261374][    C3] stack backtrace:
[   18.261605][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   18.261608][    C3] Call Trace:
[   18.261610][    C3]  <IRQ>
[ 18.261612][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 18.261618][ C3] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) 
[ 18.261623][ C3] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) 
[ 18.261628][ C3] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 18.261634][ C3] ? save_trace (kernel/locking/lockdep.c:594) 
[ 18.261638][ C3] mark_lock (kernel/locking/lockdep.c:4754) 
[ 18.261642][ C3] mark_usage (kernel/locking/lockdep.c:4643) 
[ 18.261646][ C3] __lock_acquire (kernel/locking/lockdep.c:5189) 
[ 18.261651][ C3] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 18.261655][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 18.261659][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 18.261664][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 18.261667][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 18.261671][ C3] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 18.261674][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 18.261678][ C3] simple_pin_fs (fs/libfs.c:1066) 
[ 18.261681][ C3] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 18.261684][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 18.261690][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 18.261693][ 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) 
[ 18.261698][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 18.261702][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 18.261704][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 18.261707][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 18.261711][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 18.261715][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 18.261718][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 18.261720][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 18.261722][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 18.261726][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 18.261728][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 18.261731][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 18.261736][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 18.261742][ C3] __put_net (net/core/net_namespace.c:732) 
[ 18.261745][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 18.261749][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 18.261752][ C3] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 18.261755][ C3] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 18.261759][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 18.261763][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 18.261766][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 18.261770][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 18.261774][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 18.261777][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 18.261782][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 18.261784][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 18.261786][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   18.261789][    C3]  </IRQ>
[   18.261791][    C3]  <TASK>
[ 18.261792][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 18.261795][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 18.261799][ 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
[   18.261802][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000242
[   18.261806][    C3] RAX: 000000000003feb3 RBX: 1ffff9200002afc1 RCX: ffffffffb6f55a19
[   18.261808][    C3] RDX: 0000000000000000 RSI: ffffffffb7a85f31 RDI: ffffffffb7250ce0
[   18.261810][    C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c3667a
[   18.261811][    C3] R10: ffff8880361b33d3 R11: 0000000000000000 R12: 0000000000000000
[   18.261813][    C3] R13: ffff888001bb4640 R14: dffffc0000000000 R15: 0000000000000000
[ 18.261817][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 18.261822][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 18.261825][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 18.261827][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 18.261831][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 18.261835][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 18.261840][ C3] do_idle (kernel/sched/idle.c:325) 
[ 18.261844][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 18.261848][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 18.261851][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 18.261856][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   18.277446][    C3] RCU nest depth: 0, expected: 0
| [   18.277614][    C3] INFO: lockdep is turned off.
| [   18.277879][    C3] Preemption disabled at:
| [ 18.277881][ C3] 0x0 
[   18.278179][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   18.278181][    C3] Call Trace:
[   18.278182][    C3]  <IRQ>
[ 18.278184][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 18.278191][ C3] __might_resched (kernel/sched/core.c:8819) 
[ 18.278197][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 18.278201][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 18.278204][ C3] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 18.278208][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 18.278214][ 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) 
[ 18.278219][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 18.278221][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 18.278229][ 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) 
[ 18.278233][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 18.278236][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 18.278241][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 18.278244][ 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) 
[ 18.278249][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 18.278253][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 18.278256][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 18.278259][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 18.278263][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 18.278267][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 18.278270][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 18.278273][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 18.278275][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 18.278279][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 18.278282][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 18.278285][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 18.278289][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 18.278295][ C3] __put_net (net/core/net_namespace.c:732) 
[ 18.278299][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 18.278303][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 18.278305][ C3] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 18.278309][ C3] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 18.278314][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 18.278318][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 18.278322][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 18.278325][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 18.278330][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 18.278333][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 18.278338][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 18.278340][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 18.278343][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   18.278346][    C3]  </IRQ>
[   18.278347][    C3]  <TASK>
[ 18.278348][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 18.278351][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 18.278355][ 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
[   18.278357][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000242
[   18.278361][    C3] RAX: 000000000003feb3 RBX: 1ffff9200002afc1 RCX: ffffffffb6f55a19
[   18.278363][    C3] RDX: 0000000000000000 RSI: ffffffffb7a85f31 RDI: ffffffffb7250ce0
[   18.278364][    C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c3667a
[   18.278366][    C3] R10: ffff8880361b33d3 R11: 0000000000000000 R12: 0000000000000000
[   18.278368][    C3] R13: ffff888001bb4640 R14: dffffc0000000000 R15: 0000000000000000
[ 18.278371][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 18.278377][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 18.278379][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 18.278381][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 18.278385][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 18.278389][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 18.278394][ C3] do_idle (kernel/sched/idle.c:325) 
[ 18.278398][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 18.278401][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 18.278405][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 18.278410][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   21.020513][    C0] INFO: lockdep is turned off.
| [   21.020819][    C0] Preemption disabled at:
| [ 21.020822][ C0] schedule_preempt_disabled (kernel/sched/core.c:6919) 
| [   21.021580][    C0] Tainted: [W]=WARN
[   21.021583][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   21.021585][    C0] Call Trace:
[   21.021588][    C0]  <IRQ>
[ 21.021591][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 21.021600][ C0] __might_resched (kernel/sched/core.c:8819) 
[ 21.021609][ C0] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 21.021615][ C0] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 21.021620][ C0] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 21.021625][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 21.021633][ C0] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 21.021640][ C0] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 21.021644][ C0] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 21.021651][ C0] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 21.021659][ C0] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 21.021664][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 21.021671][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 21.021676][ C0] ? __sk_destruct (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:400 ./include/linux/refcount.h:389 ./include/linux/refcount.h:432 ./include/linux/refcount.h:450 ./include/net/net_namespace.h:287 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 21.021683][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 21.021689][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 21.021694][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 21.021700][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 21.021706][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 21.021712][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 21.021717][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 21.021721][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 21.021725][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 21.021731][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 21.021735][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 21.021740][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 21.021745][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 21.021752][ C0] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 21.021758][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 21.021766][ C0] __put_net (net/core/net_namespace.c:732) 
[ 21.021771][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 21.021778][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 21.021783][ C0] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 21.021792][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 21.021798][ C0] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 21.021805][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 21.021813][ C0] rcu_core (kernel/rcu/tree.c:2826) 
[ 21.021819][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 21.021828][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 21.021832][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 21.021837][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   21.021843][    C0]  </IRQ>
[   21.021845][    C0]  <TASK>
[ 21.021848][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 21.021852][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 21.021858][ C0] 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
[   21.021863][    C0] RSP: 0018:ffffffffb7c07df8 EFLAGS: 00000246
[   21.021869][    C0] RAX: 0000000000000000 RBX: 1ffffffff6f80fc3 RCX: ffffffffb6f55a19
[   21.021873][    C0] RDX: ffffed1006c0667b RSI: ffffffffb7250c60 RDI: ffffffffb4784d8f
[   21.021876][    C0] RBP: 0000000000000000 R08: 0000000000000000 R09: ffffed1006c0667a
[   21.021879][    C0] R10: ffff8880360333d3 R11: ffff888011728558 R12: 0000000000000000
[   21.021882][    C0] R13: ffffffffb7c1f240 R14: dffffc0000000000 R15: 0000000000014770
[ 21.021890][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 21.021896][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 21.021903][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 21.021907][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 21.021912][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 21.021918][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 21.021924][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 21.021934][ C0] do_idle (kernel/sched/idle.c:325) 
[ 21.021941][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 21.021946][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 21.021952][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 21.021958][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:501) 
[ 21.021965][ C0] x86_64_start_kernel (arch/x86/kernel/head64.c:443 (discriminator 17)) 


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
schedule_preempt_disabled:dump_stack_lvl:__might_resched:down_write:simple_recursive_removal