======================================
| [   17.761037][    C2] 1 lock held by swapper/2/0:
| [ 17.761378][ C2] #0: ffffffffb5774480 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) 
| [   17.761930][    C2]
| [   17.761930][    C2] stack backtrace:
[   17.762295][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   17.762298][    C2] Call Trace:
[   17.762300][    C2]  <IRQ>
[ 17.762304][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 17.762315][ C2] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) 
[ 17.762325][ C2] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) 
[ 17.762333][ C2] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 17.762341][ C2] ? save_trace (kernel/locking/lockdep.c:594) 
[ 17.762348][ C2] mark_lock (kernel/locking/lockdep.c:4754) 
[ 17.762355][ C2] mark_usage (kernel/locking/lockdep.c:4643) 
[ 17.762361][ C2] __lock_acquire (kernel/locking/lockdep.c:5189) 
[ 17.762368][ C2] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 17.762373][ C2] ? simple_pin_fs (fs/libfs.c:1066) 
[ 17.762381][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.762388][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 17.762393][ C2] ? simple_pin_fs (fs/libfs.c:1066) 
[ 17.762400][ C2] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 17.762406][ C2] ? simple_pin_fs (fs/libfs.c:1066) 
[ 17.762411][ C2] simple_pin_fs (fs/libfs.c:1066) 
[ 17.762416][ C2] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 17.762422][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 17.762430][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 17.762434][ 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) 
[ 17.762441][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 17.762446][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 17.762450][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 17.762454][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 17.762461][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.762466][ C2] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 17.762471][ C2] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 17.762475][ C2] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.762479][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.762485][ C2] ? do_idle (kernel/sched/idle.c:325) 
[ 17.762490][ C2] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.762495][ C2] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 17.762502][ C2] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 17.762511][ C2] __put_net (net/core/net_namespace.c:732) 
[ 17.762516][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 17.762522][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 17.762527][ C2] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 17.762532][ C2] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 17.762536][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 17.762542][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 17.762547][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 17.762552][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 17.762559][ C2] rcu_core (kernel/rcu/tree.c:2826) 
[ 17.762564][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 17.762572][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 17.762577][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 17.762581][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   17.762586][    C2]  </IRQ>
[   17.762588][    C2]  <TASK>
[ 17.762591][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.762596][ C2] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 17.762602][ 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
[   17.762607][    C2] RSP: 0018:ffffc90000147de8 EFLAGS: 00000242
[   17.762612][    C2] RAX: 00000000000472e5 RBX: 1ffff92000028fc1 RCX: ffffffffb4755a19
[   17.762616][    C2] RDX: 0000000000000000 RSI: ffffffffb5285f31 RDI: ffffffffb4a50ce0
[   17.762619][    C2] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c2667a
[   17.762621][    C2] R10: ffff8880361333d3 R11: 0000000000000000 R12: 0000000000000000
[   17.762624][    C2] R13: ffff888001bb2340 R14: dffffc0000000000 R15: 0000000000000000
[ 17.762630][ C2] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 17.762638][ C2] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 17.762642][ C2] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.762646][ C2] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.762652][ C2] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 17.762659][ C2] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 17.762667][ C2] do_idle (kernel/sched/idle.c:325) 
[ 17.762673][ C2] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.762679][ C2] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 17.762685][ C2] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 17.762694][ C2] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   17.785161][    C2] RCU nest depth: 0, expected: 0
| [   17.785341][    C2] INFO: lockdep is turned off.
| [   17.785543][    C2] Preemption disabled at:
| [ 17.785545][ C2] 0x0 
[   17.785874][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   17.785876][    C2] Call Trace:
[   17.785877][    C2]  <IRQ>
[ 17.785880][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 17.785889][ C2] __might_resched (kernel/sched/core.c:8819) 
[ 17.785895][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 17.785900][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 17.785902][ C2] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 17.785907][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.785913][ 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) 
[ 17.785917][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 17.785920][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 17.785924][ 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) 
[ 17.785928][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 17.785931][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 17.785936][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 17.785939][ 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) 
[ 17.785945][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 17.785949][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 17.785952][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 17.785956][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 17.785961][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.785965][ C2] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 17.785968][ C2] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 17.785970][ C2] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.785972][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.785977][ C2] ? do_idle (kernel/sched/idle.c:325) 
[ 17.785980][ C2] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.785983][ C2] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 17.785988][ C2] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 17.785994][ C2] __put_net (net/core/net_namespace.c:732) 
[ 17.785998][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 17.786001][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 17.786005][ C2] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 17.786008][ C2] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 17.786014][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 17.786017][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 17.786021][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 17.786025][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 17.786029][ C2] rcu_core (kernel/rcu/tree.c:2826) 
[ 17.786033][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 17.786037][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 17.786040][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 17.786042][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   17.786045][    C2]  </IRQ>
[   17.786046][    C2]  <TASK>
[ 17.786048][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.786050][ C2] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 17.786054][ 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
[   17.786057][    C2] RSP: 0018:ffffc90000147de8 EFLAGS: 00000242
[   17.786060][    C2] RAX: 00000000000472e5 RBX: 1ffff92000028fc1 RCX: ffffffffb4755a19
[   17.786062][    C2] RDX: 0000000000000000 RSI: ffffffffb5285f31 RDI: ffffffffb4a50ce0
[   17.786064][    C2] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c2667a
[   17.786066][    C2] R10: ffff8880361333d3 R11: 0000000000000000 R12: 0000000000000000
[   17.786068][    C2] R13: ffff888001bb2340 R14: dffffc0000000000 R15: 0000000000000000
[ 17.786071][ C2] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 17.786077][ C2] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 17.786079][ C2] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.786081][ C2] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.786085][ C2] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 17.786089][ C2] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 17.786094][ C2] do_idle (kernel/sched/idle.c:325) 
[ 17.786098][ C2] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.786102][ C2] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 17.786105][ C2] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 17.786110][ C2] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   20.402260][    C0] INFO: lockdep is turned off.
| [   20.402559][    C0] Preemption disabled at:
| [ 20.402561][ C0] schedule_preempt_disabled (kernel/sched/core.c:6919) 
| [   20.403227][    C0] Tainted: [W]=WARN
[   20.403228][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   20.403230][    C0] Call Trace:
[   20.403232][    C0]  <IRQ>
[ 20.403234][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 20.403240][ C0] __might_resched (kernel/sched/core.c:8819) 
[ 20.403246][ C0] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 20.403250][ C0] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 20.403252][ C0] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 20.403257][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 20.403263][ 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) 
[ 20.403268][ C0] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 20.403270][ C0] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 20.403275][ 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) 
[ 20.403279][ C0] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 20.403283][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 20.403289][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 20.403293][ 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) 
[ 20.403300][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 20.403306][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 20.403310][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 20.403314][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 20.403320][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 20.403325][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 20.403329][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 20.403331][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 20.403334][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 20.403338][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 20.403341][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 20.403344][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 20.403347][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 20.403352][ C0] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 20.403356][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 20.403361][ C0] __put_net (net/core/net_namespace.c:732) 
[ 20.403364][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 20.403368][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 20.403371][ C0] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 20.403376][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 20.403379][ C0] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 20.403385][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 20.403390][ C0] rcu_core (kernel/rcu/tree.c:2826) 
[ 20.403394][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 20.403398][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 20.403401][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 20.403403][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   20.403406][    C0]  </IRQ>
[   20.403407][    C0]  <TASK>
[ 20.403409][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 20.403411][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 20.403416][ 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
[   20.403419][    C0] RSP: 0018:ffffffffb5407df8 EFLAGS: 00000246
[   20.403422][    C0] RAX: 0000000000000000 RBX: 1ffffffff6a80fc3 RCX: ffffffffb4755a19
[   20.403424][    C0] RDX: ffffed1006c0667b RSI: ffffffffb4a50c60 RDI: ffffffffb1f84d8f
[   20.403426][    C0] RBP: 0000000000000000 R08: 0000000000000000 R09: ffffed1006c0667a
[   20.403428][    C0] R10: ffff8880360333d3 R11: ffffffffb80cf568 R12: 0000000000000000
[   20.403430][    C0] R13: ffffffffb541f240 R14: dffffc0000000000 R15: 0000000000014770
[ 20.403434][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 20.403438][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 20.403442][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 20.403444][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 20.403447][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 20.403450][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 20.403454][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 20.403461][ C0] do_idle (kernel/sched/idle.c:325) 
[ 20.403465][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 20.403469][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 20.403472][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 20.403477][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:501) 
[ 20.403482][ 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