======================================
| [   15.658188][    C3] 1 lock held by swapper/3/0:
| [ 15.658394][ C3] #0: ffffffffbab749c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) 
| [   15.658762][    C3]
| [   15.658762][    C3] stack backtrace:
[   15.659040][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.659043][    C3] Call Trace:
[   15.659045][    C3]  <IRQ>
[ 15.659047][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.659055][ C3] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) 
[ 15.659062][ C3] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) 
[ 15.659067][ C3] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 15.659074][ C3] ? save_trace (kernel/locking/lockdep.c:594) 
[ 15.659078][ C3] mark_lock (kernel/locking/lockdep.c:4754) 
[ 15.659083][ C3] mark_usage (kernel/locking/lockdep.c:4643) 
[ 15.659087][ C3] __lock_acquire (kernel/locking/lockdep.c:5189) 
[ 15.659092][ C3] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 15.659095][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 15.659099][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 15.659105][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 15.659107][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 15.659111][ C3] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 15.659114][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 15.659117][ C3] simple_pin_fs (fs/libfs.c:1066) 
[ 15.659120][ C3] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 15.659124][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 15.659130][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 15.659133][ 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) 
[ 15.659139][ C3] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 15.659143][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 15.659145][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.659148][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 15.659152][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.659156][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.659159][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.659161][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.659163][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.659168][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 15.659171][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.659174][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.659179][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 15.659187][ C3] __put_net (net/core/net_namespace.c:732) 
[ 15.659192][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 15.659196][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.659199][ C3] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 15.659203][ C3] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 15.659207][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 15.659211][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 15.659215][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 15.659219][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.659224][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 15.659228][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 15.659233][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.659235][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.659237][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   15.659241][    C3]  </IRQ>
[   15.659242][    C3]  <TASK>
[ 15.659244][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.659247][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.659251][ 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
[   15.659255][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000246
[   15.659258][    C3] RAX: 000000000003804d RBX: 1ffff9200002afc1 RCX: ffffffffb9b5ba19
[   15.659261][    C3] RDX: 0000000000000000 RSI: ffffffffba687785 RDI: ffffffffb9e51260
[   15.659262][    C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c3667a
[   15.659264][    C3] R10: ffff8880361b33d3 R11: 0000000000000000 R12: 0000000000000000
[   15.659266][    C3] R13: ffff888001bf4640 R14: dffffc0000000000 R15: 0000000000000000
[ 15.659270][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 15.659274][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.659277][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.659279][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.659283][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 15.659287][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 15.659292][ C3] do_idle (kernel/sched/idle.c:325) 
[ 15.659296][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.659300][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.659303][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 15.659309][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   15.676528][    C3] RCU nest depth: 0, expected: 0
| [   15.676716][    C3] INFO: lockdep is turned off.
| [   15.676903][    C3] Preemption disabled at:
| [ 15.676905][ C3] 0x0 
[   15.677358][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.677360][    C3] Call Trace:
[   15.677361][    C3]  <IRQ>
[ 15.677363][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.677372][ C3] __might_resched (kernel/sched/core.c:8819) 
[ 15.677379][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 15.677384][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 15.677387][ C3] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 15.677392][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 15.677399][ 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) 
[ 15.677405][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 15.677408][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 15.677412][ 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) 
[ 15.677417][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 15.677421][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 15.677426][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 15.677429][ 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) 
[ 15.677435][ C3] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 15.677439][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 15.677442][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.677446][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 15.677451][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.677455][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.677458][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.677461][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.677463][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.677468][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 15.677471][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.677474][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.677479][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 15.677485][ C3] __put_net (net/core/net_namespace.c:732) 
[ 15.677490][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 15.677494][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.677497][ C3] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 15.677501][ C3] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 15.677507][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 15.677511][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 15.677515][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 15.677518][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.677523][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 15.677528][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 15.677532][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.677535][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.677537][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   15.677541][    C3]  </IRQ>
[   15.677542][    C3]  <TASK>
[ 15.677544][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.677546][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.677550][ 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
[   15.677552][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000246
[   15.677556][    C3] RAX: 000000000003804d RBX: 1ffff9200002afc1 RCX: ffffffffb9b5ba19
[   15.677558][    C3] RDX: 0000000000000000 RSI: ffffffffba687785 RDI: ffffffffb9e51260
[   15.677560][    C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c3667a
[   15.677562][    C3] R10: ffff8880361b33d3 R11: 0000000000000000 R12: 0000000000000000
[   15.677564][    C3] R13: ffff888001bf4640 R14: dffffc0000000000 R15: 0000000000000000
[ 15.677568][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 15.677572][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.677575][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.677577][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.677581][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 15.677585][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 15.677590][ C3] do_idle (kernel/sched/idle.c:325) 
[ 15.677594][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.677598][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.677601][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 15.677607][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   17.397804][    C1] INFO: lockdep is turned off.
| [   17.397999][    C1] Preemption disabled at:
| [ 17.398001][ C1] 0x0 
| [   17.398361][    C1] Tainted: [W]=WARN
[   17.398362][    C1] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   17.398365][    C1] Call Trace:
[   17.398367][    C1]  <IRQ>
[ 17.398369][ C1] dump_stack_lvl (lib/dump_stack.c:123) 
[ 17.398380][ C1] __might_resched (kernel/sched/core.c:8819) 
[ 17.398388][ C1] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 17.398394][ C1] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 17.398397][ C1] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 17.398403][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.398411][ C1] ? 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) 
[ 17.398417][ C1] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 17.398420][ C1] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 17.398426][ C1] ? 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) 
[ 17.398430][ C1] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 17.398433][ C1] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 17.398440][ C1] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 17.398443][ C1] ? __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) 
[ 17.398449][ C1] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 17.398455][ C1] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 17.398458][ C1] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 17.398463][ C1] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 17.398469][ C1] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.398473][ C1] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 17.398477][ C1] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 17.398479][ C1] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.398481][ C1] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.398487][ C1] ? do_idle (kernel/sched/idle.c:325) 
[ 17.398491][ C1] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.398494][ C1] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 17.398500][ C1] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 17.398506][ C1] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 17.398511][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.398516][ C1] __put_net (net/core/net_namespace.c:732) 
[ 17.398520][ C1] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 17.398524][ C1] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 17.398527][ C1] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 17.398533][ C1] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 17.398537][ C1] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 17.398543][ C1] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 17.398550][ C1] rcu_core (kernel/rcu/tree.c:2826) 
[ 17.398554][ C1] handle_softirqs (kernel/softirq.c:579) 
[ 17.398559][ C1] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 17.398562][ C1] irq_exit_rcu (kernel/softirq.c:698) 
[ 17.398565][ C1] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   17.398568][    C1]  </IRQ>
[   17.398569][    C1]  <TASK>
[ 17.398571][ C1] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.398574][ C1] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 17.398578][ C1] 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
[   17.398581][    C1] RSP: 0018:ffffc90000137de8 EFLAGS: 00000246
[   17.398586][    C1] RAX: 0000000000000001 RBX: 1ffff92000026fc1 RCX: ffffffffb9b5ba19
[   17.398588][    C1] RDX: ffffed1006c1667b RSI: ffffffffb9e511e0 RDI: ffffffffb738633f
[   17.398589][    C1] RBP: 0000000000000000 R08: 0000000000000000 R09: ffffed1006c1667a
[   17.398591][    C1] R10: ffff8880360b33d3 R11: ffff888004eba858 R12: 0000000000000000
[   17.398593][    C1] R13: ffff888001bf0040 R14: dffffc0000000000 R15: 0000000000000000
[ 17.398597][ C1] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 17.398600][ C1] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.398605][ C1] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 17.398608][ C1] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.398610][ C1] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.398614][ C1] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 17.398619][ C1] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 17.398624][ C1] do_idle (kernel/sched/idle.c:325) 
[ 17.398628][ C1] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.398632][ C1] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 17.398636][ C1] ? __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