======================================
| [   14.469224][    C2] 1 lock held by swapper/2/0:
| [ 14.469430][ C2] #0: ffffffff93f74480 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) 
| [   14.469811][    C2]
| [   14.469811][    C2] stack backtrace:
[   14.470065][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   14.470067][    C2] Call Trace:
[   14.470069][    C2]  <IRQ>
[ 14.470071][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 14.470076][ C2] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) 
[ 14.470082][ C2] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) 
[ 14.470087][ C2] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 14.470092][ C2] ? save_trace (kernel/locking/lockdep.c:594) 
[ 14.470096][ C2] mark_lock (kernel/locking/lockdep.c:4754) 
[ 14.470100][ C2] mark_usage (kernel/locking/lockdep.c:4643) 
[ 14.470103][ C2] __lock_acquire (kernel/locking/lockdep.c:5189) 
[ 14.470109][ C2] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 14.470112][ C2] ? simple_pin_fs (fs/libfs.c:1066) 
[ 14.470117][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 14.470122][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 14.470125][ C2] ? simple_pin_fs (fs/libfs.c:1066) 
[ 14.470129][ C2] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 14.470132][ C2] ? simple_pin_fs (fs/libfs.c:1066) 
[ 14.470136][ C2] simple_pin_fs (fs/libfs.c:1066) 
[ 14.470139][ C2] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 14.470143][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 14.470148][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 14.470151][ C2] ? __sk_destruct (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:400 ./include/linux/refcount.h:389 ./include/linux/refcount.h:432 ./include/linux/refcount.h:450 ./include/net/net_namespace.h:287 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 14.470155][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.470158][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 14.470161][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 14.470163][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 14.470167][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.470170][ C2] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 14.470173][ C2] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 14.470175][ C2] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 14.470177][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 14.470180][ C2] ? do_idle (kernel/sched/idle.c:325) 
[ 14.470183][ C2] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 14.470186][ C2] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 14.470190][ C2] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 14.470196][ C2] __put_net (net/core/net_namespace.c:732) 
[ 14.470200][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 14.470203][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.470206][ C2] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.470210][ C2] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 14.470214][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 14.470217][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 14.470220][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 14.470224][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 14.470228][ C2] rcu_core (kernel/rcu/tree.c:2826) 
[ 14.470232][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 14.470236][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 14.470238][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 14.470240][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   14.470244][    C2]  </IRQ>
[   14.470245][    C2]  <TASK>
[ 14.470246][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.470249][ C2] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 14.470253][ C2] Code: b0 b8 00 c3 cc cc cc cc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d a3 d0 13 00 fb f4 <c3> cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
All code
========
   0:	b0 b8                	mov    $0xb8,%al
   2:	00 c3                	add    %al,%bl
   4:	cc                   	int3
   5:	cc                   	int3
   6:	cc                   	int3
   7:	cc                   	int3
   8:	0f 1f 00             	nopl   (%rax)
   b:	90                   	nop
   c:	90                   	nop
   d:	90                   	nop
   e:	90                   	nop
   f:	90                   	nop
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
  16:	90                   	nop
  17:	90                   	nop
  18:	90                   	nop
  19:	90                   	nop
  1a:	90                   	nop
  1b:	f3 0f 1e fa          	endbr64
  1f:	66 90                	xchg   %ax,%ax
  21:	0f 00 2d a3 d0 13 00 	verw   0x13d0a3(%rip)        # 0x13d0cb
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	c3                   	ret		<-- trapping instruction
  2b:	cc                   	int3
  2c:	cc                   	int3
  2d:	cc                   	int3
  2e:	cc                   	int3
  2f:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  36:	00 00 00 
  39:	66 90                	xchg   %ax,%ax
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	90                   	nop
  3f:	90                   	nop

Code starting with the faulting instruction
===========================================
   0:	c3                   	ret
   1:	cc                   	int3
   2:	cc                   	int3
   3:	cc                   	int3
   4:	cc                   	int3
   5:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   c:	00 00 00 
   f:	66 90                	xchg   %ax,%ax
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
[   14.470255][    C2] RSP: 0018:ffffc90000147de8 EFLAGS: 00000242
[   14.470259][    C2] RAX: 0000000000046c1f RBX: 1ffff92000028fc1 RCX: ffffffff92f55a19
[   14.470261][    C2] RDX: 0000000000000000 RSI: ffffffff93a85f31 RDI: ffffffff93250ce0
[   14.470263][    C2] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c2667a
[   14.470265][    C2] R10: ffff8880361333d3 R11: 0000000000000000 R12: 0000000000000000
[   14.470266][    C2] R13: ffff888001bb2340 R14: dffffc0000000000 R15: 0000000000000000
[ 14.470270][ C2] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 14.470275][ C2] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 14.470277][ C2] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 14.470280][ C2] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 14.470283][ C2] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 14.470287][ C2] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 14.470292][ C2] do_idle (kernel/sched/idle.c:325) 
[ 14.470295][ C2] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 14.470299][ C2] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 14.470302][ C2] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 14.470307][ C2] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   14.487660][    C2] RCU nest depth: 0, expected: 0
| [   14.487860][    C2] INFO: lockdep is turned off.
| [   14.488060][    C2] Preemption disabled at:
| [ 14.488061][ C2] 0x0 
[   14.488449][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   14.488450][    C2] Call Trace:
[   14.488452][    C2]  <IRQ>
[ 14.488454][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 14.488460][ C2] __might_resched (kernel/sched/core.c:8819) 
[ 14.488466][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 14.488469][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 14.488472][ C2] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 14.488476][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 14.488481][ C2] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 14.488485][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 14.488488][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 14.488492][ C2] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 14.488496][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 14.488499][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 14.488503][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 14.488506][ C2] ? __sk_destruct (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:400 ./include/linux/refcount.h:389 ./include/linux/refcount.h:432 ./include/linux/refcount.h:450 ./include/net/net_namespace.h:287 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 14.488511][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.488514][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 14.488517][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 14.488521][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 14.488525][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.488528][ C2] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 14.488531][ C2] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 14.488533][ C2] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 14.488536][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 14.488541][ C2] ? do_idle (kernel/sched/idle.c:325) 
[ 14.488544][ C2] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 14.488547][ C2] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 14.488551][ C2] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 14.488557][ C2] __put_net (net/core/net_namespace.c:732) 
[ 14.488560][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 14.488567][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.488570][ C2] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.488574][ C2] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 14.488578][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 14.488582][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 14.488586][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 14.488590][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 14.488594][ C2] rcu_core (kernel/rcu/tree.c:2826) 
[ 14.488597][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 14.488602][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 14.488604][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 14.488607][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   14.488610][    C2]  </IRQ>
[   14.488611][    C2]  <TASK>
[ 14.488613][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.488615][ C2] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 14.488619][ C2] Code: b0 b8 00 c3 cc cc cc cc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d a3 d0 13 00 fb f4 <c3> cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
All code
========
   0:	b0 b8                	mov    $0xb8,%al
   2:	00 c3                	add    %al,%bl
   4:	cc                   	int3
   5:	cc                   	int3
   6:	cc                   	int3
   7:	cc                   	int3
   8:	0f 1f 00             	nopl   (%rax)
   b:	90                   	nop
   c:	90                   	nop
   d:	90                   	nop
   e:	90                   	nop
   f:	90                   	nop
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
  16:	90                   	nop
  17:	90                   	nop
  18:	90                   	nop
  19:	90                   	nop
  1a:	90                   	nop
  1b:	f3 0f 1e fa          	endbr64
  1f:	66 90                	xchg   %ax,%ax
  21:	0f 00 2d a3 d0 13 00 	verw   0x13d0a3(%rip)        # 0x13d0cb
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	c3                   	ret		<-- trapping instruction
  2b:	cc                   	int3
  2c:	cc                   	int3
  2d:	cc                   	int3
  2e:	cc                   	int3
  2f:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  36:	00 00 00 
  39:	66 90                	xchg   %ax,%ax
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	90                   	nop
  3f:	90                   	nop

Code starting with the faulting instruction
===========================================
   0:	c3                   	ret
   1:	cc                   	int3
   2:	cc                   	int3
   3:	cc                   	int3
   4:	cc                   	int3
   5:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   c:	00 00 00 
   f:	66 90                	xchg   %ax,%ax
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
[   14.488621][    C2] RSP: 0018:ffffc90000147de8 EFLAGS: 00000242
[   14.488625][    C2] RAX: 0000000000046c1f RBX: 1ffff92000028fc1 RCX: ffffffff92f55a19
[   14.488627][    C2] RDX: 0000000000000000 RSI: ffffffff93a85f31 RDI: ffffffff93250ce0
[   14.488629][    C2] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c2667a
[   14.488630][    C2] R10: ffff8880361333d3 R11: 0000000000000000 R12: 0000000000000000
[   14.488632][    C2] R13: ffff888001bb2340 R14: dffffc0000000000 R15: 0000000000000000
[ 14.488636][ C2] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 14.488641][ C2] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 14.488643][ C2] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 14.488646][ C2] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 14.488649][ C2] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 14.488653][ C2] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 14.488658][ C2] do_idle (kernel/sched/idle.c:325) 
[ 14.488662][ C2] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 14.488665][ C2] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 14.488669][ C2] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 14.488674][ C2] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   16.153995][    C0] INFO: lockdep is turned off.
| [   16.154207][    C0] Preemption disabled at:
| [ 16.154209][ C0] schedule_preempt_disabled (kernel/sched/core.c:6919) 
| [   16.154682][    C0] Tainted: [W]=WARN
[   16.154683][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.154685][    C0] Call Trace:
[   16.154687][    C0]  <IRQ>
[ 16.154688][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 16.154694][ C0] __might_resched (kernel/sched/core.c:8819) 
[ 16.154700][ C0] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 16.154704][ C0] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 16.154707][ C0] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 16.154711][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.154717][ 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) 
[ 16.154722][ C0] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 16.154724][ C0] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 16.154729][ 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) 
[ 16.154733][ C0] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 16.154736][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 16.154741][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 16.154744][ 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) 
[ 16.154749][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 16.154753][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 16.154756][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 16.154760][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 16.154764][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.154768][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 16.154771][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 16.154773][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 16.154775][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 16.154780][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 16.154783][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 16.154786][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 16.154788][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 16.154793][ C0] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 16.154797][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.154802][ C0] __put_net (net/core/net_namespace.c:732) 
[ 16.154805][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 16.154809][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 16.154812][ C0] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 16.154817][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 16.154821][ C0] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 16.154825][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 16.154831][ C0] rcu_core (kernel/rcu/tree.c:2826) 
[ 16.154834][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 16.154839][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 16.154841][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 16.154843][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   16.154847][    C0]  </IRQ>
[   16.154848][    C0]  <TASK>
[ 16.154849][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.154852][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 16.154856][ 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
[   16.154859][    C0] RSP: 0018:ffffffff93c07df8 EFLAGS: 00000246
[   16.154863][    C0] RAX: 0000000000000000 RBX: 1ffffffff2780fc3 RCX: ffffffff92f55a19
[   16.154865][    C0] RDX: ffffed1006c0667b RSI: ffffffff93250c60 RDI: ffffffff90784d8f
[   16.154867][    C0] RBP: 0000000000000000 R08: 0000000000000000 R09: ffffed1006c0667a
[   16.154868][    C0] R10: ffff8880360333d3 R11: ffff88800a4dcb58 R12: 0000000000000000
[   16.154870][    C0] R13: ffffffff93c1f240 R14: dffffc0000000000 R15: 0000000000014770
[ 16.154874][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 16.154878][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 16.154883][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 16.154885][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 16.154887][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 16.154891][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 16.154895][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 16.154901][ C0] do_idle (kernel/sched/idle.c:325) 
[ 16.154905][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 16.154909][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 16.154912][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 16.154916][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:501) 
[ 16.154920][ 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