======================================
| [   15.666677][    C2] 1 lock held by swapper/2/0:
| [ 15.666878][ C2] #0: ffffffff857749c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) 
| [   15.667233][    C2]
| [   15.667233][    C2] stack backtrace:
[   15.667485][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.667487][    C2] Call Trace:
[   15.667489][    C2]  <IRQ>
[ 15.667492][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.667499][ C2] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) 
[ 15.667504][ C2] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) 
[ 15.667509][ C2] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 15.667516][ C2] ? save_trace (kernel/locking/lockdep.c:594) 
[ 15.667521][ C2] mark_lock (kernel/locking/lockdep.c:4754) 
[ 15.667525][ C2] mark_usage (kernel/locking/lockdep.c:4643) 
[ 15.667529][ C2] __lock_acquire (kernel/locking/lockdep.c:5189) 
[ 15.667535][ C2] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 15.667537][ C2] ? simple_pin_fs (fs/libfs.c:1066) 
[ 15.667540][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 15.667547][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 15.667549][ C2] ? simple_pin_fs (fs/libfs.c:1066) 
[ 15.667553][ C2] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 15.667556][ C2] ? simple_pin_fs (fs/libfs.c:1066) 
[ 15.667558][ C2] simple_pin_fs (fs/libfs.c:1066) 
[ 15.667562][ C2] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 15.667565][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 15.667571][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 15.667574][ 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:2366) 
[ 15.667581][ C2] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 15.667584][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 15.667587][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.667590][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 15.667595][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.667599][ C2] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.667602][ C2] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.667605][ C2] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.667607][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.667612][ C2] ? do_idle (kernel/sched/idle.c:325) 
[ 15.667615][ C2] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.667618][ C2] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.667624][ C2] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 15.667631][ C2] __put_net (net/core/net_namespace.c:732) 
[ 15.667635][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 15.667639][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.667642][ C2] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 15.667646][ C2] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 15.667650][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 15.667654][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 15.667658][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 15.667662][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.667666][ C2] rcu_core (kernel/rcu/tree.c:2826) 
[ 15.667671][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 15.667675][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.667678][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.667680][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   15.667684][    C2]  </IRQ>
[   15.667685][    C2]  <TASK>
[ 15.667686][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.667689][ C2] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.667693][ C2] 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
[   15.667696][    C2] RSP: 0018:ffffc90000147de8 EFLAGS: 00000242
[   15.667700][    C2] RAX: 00000000000470a1 RBX: 1ffff92000028fc1 RCX: ffffffff8475ba19
[   15.667702][    C2] RDX: 0000000000000000 RSI: ffffffff85287785 RDI: ffffffff84a51260
[   15.667704][    C2] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1005ea667a
[   15.667706][    C2] R10: ffff88802f5333d3 R11: 0000000000000000 R12: 0000000000000000
[   15.667708][    C2] R13: ffff888001bf2340 R14: dffffc0000000000 R15: 0000000000000000
[ 15.667712][ C2] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 15.667716][ C2] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.667719][ C2] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.667721][ C2] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.667725][ C2] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 15.667729][ C2] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 15.667734][ C2] do_idle (kernel/sched/idle.c:325) 
[ 15.667738][ C2] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.667742][ C2] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.667745][ C2] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 15.667751][ C2] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   15.684430][    C2] RCU nest depth: 0, expected: 0
| [   15.684629][    C2] INFO: lockdep is turned off.
| [   15.684834][    C2] Preemption disabled at:
| [ 15.684836][ C2] 0x0 
[   15.685193][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.685195][    C2] Call Trace:
[   15.685197][    C2]  <IRQ>
[ 15.685199][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.685207][ C2] __might_resched (kernel/sched/core.c:8819) 
[ 15.685214][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 15.685220][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 15.685223][ C2] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 15.685229][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 15.685235][ 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) 
[ 15.685241][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 15.685244][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 15.685248][ 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) 
[ 15.685253][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 15.685256][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 15.685262][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 15.685265][ 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:2366) 
[ 15.685271][ C2] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 15.685275][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 15.685278][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.685282][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 15.685287][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.685290][ C2] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.685294][ C2] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.685296][ C2] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.685298][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.685304][ C2] ? do_idle (kernel/sched/idle.c:325) 
[ 15.685307][ C2] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.685310][ C2] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.685315][ C2] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 15.685322][ C2] __put_net (net/core/net_namespace.c:732) 
[ 15.685326][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 15.685330][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.685333][ C2] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 15.685337][ C2] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 15.685343][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 15.685346][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 15.685351][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 15.685355][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.685360][ C2] rcu_core (kernel/rcu/tree.c:2826) 
[ 15.685363][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 15.685368][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.685371][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.685373][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   15.685377][    C2]  </IRQ>
[   15.685378][    C2]  <TASK>
[ 15.685380][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.685383][ C2] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.685387][ C2] 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
[   15.685390][    C2] RSP: 0018:ffffc90000147de8 EFLAGS: 00000242
[   15.685394][    C2] RAX: 00000000000470a1 RBX: 1ffff92000028fc1 RCX: ffffffff8475ba19
[   15.685396][    C2] RDX: 0000000000000000 RSI: ffffffff85287785 RDI: ffffffff84a51260
[   15.685398][    C2] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1005ea667a
[   15.685400][    C2] R10: ffff88802f5333d3 R11: 0000000000000000 R12: 0000000000000000
[   15.685401][    C2] R13: ffff888001bf2340 R14: dffffc0000000000 R15: 0000000000000000
[ 15.685405][ C2] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 15.685410][ C2] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.685412][ C2] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.685415][ C2] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.685418][ C2] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 15.685423][ C2] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 15.685428][ C2] do_idle (kernel/sched/idle.c:325) 
[ 15.685432][ C2] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.685435][ C2] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.685439][ C2] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 15.685444][ C2] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   17.504493][    C3] INFO: lockdep is turned off.
| [   17.504682][    C3] Preemption disabled at:
| [ 17.504683][ C3] 0x0 
| [   17.505042][    C3] Tainted: [W]=WARN
[   17.505044][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   17.505046][    C3] Call Trace:
[   17.505048][    C3]  <IRQ>
[ 17.505050][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 17.505061][ C3] __might_resched (kernel/sched/core.c:8819) 
[ 17.505069][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 17.505074][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 17.505078][ C3] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 17.505084][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.505092][ 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) 
[ 17.505098][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 17.505101][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 17.505106][ 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) 
[ 17.505111][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 17.505114][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 17.505120][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 17.505124][ 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) 
[ 17.505131][ C3] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 17.505136][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 17.505139][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 17.505145][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 17.505151][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.505156][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 17.505159][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 17.505161][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.505164][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.505170][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 17.505173][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.505176][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 17.505182][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 17.505188][ C3] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 17.505194][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.505198][ C3] __put_net (net/core/net_namespace.c:732) 
[ 17.505202][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 17.505206][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 17.505210][ C3] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 17.505215][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 17.505219][ C3] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 17.505225][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 17.505232][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 17.505236][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 17.505241][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 17.505244][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 17.505246][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   17.505250][    C3]  </IRQ>
[   17.505251][    C3]  <TASK>
[ 17.505253][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.505255][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 17.505259][ 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
[   17.505263][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000246
[   17.505267][    C3] RAX: 0000000000000003 RBX: 1ffff9200002afc1 RCX: ffffffff8475ba19
[   17.505269][    C3] RDX: ffffed1005eb667b RSI: ffffffff84a511e0 RDI: ffffffff81f8633f
[   17.505271][    C3] RBP: 0000000000000000 R08: 0000000000000000 R09: ffffed1005eb667a
[   17.505273][    C3] R10: ffff88802f5b33d3 R11: ffffffff8812b9a8 R12: 0000000000000000
[   17.505275][    C3] R13: ffff888001bf4640 R14: dffffc0000000000 R15: 0000000000000000
[ 17.505278][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 17.505281][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.505286][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 17.505288][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.505291][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.505295][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 17.505299][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 17.505305][ C3] do_idle (kernel/sched/idle.c:325) 
[ 17.505309][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.505313][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 17.505316][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 


Finger prints:
mark_lock_irq:mark_lock:mark_usage:__lock_acquire:_raw_spin_lock
__might_resched:down_write:simple_recursive_removal:debugfs_remove:ref_tracker_dir_exit