======================================
| [   19.835229][    C3] 1 lock held by swapper/3/0:
| [ 19.835436][ C3] #0: ffffffff911749c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) 
| [   19.835807][    C3]
| [   19.835807][    C3] stack backtrace:
[   19.836068][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   19.836070][    C3] Call Trace:
[   19.836072][    C3]  <IRQ>
[ 19.836075][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 19.836081][ C3] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) 
[ 19.836087][ C3] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) 
[ 19.836093][ C3] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 19.836098][ C3] ? save_trace (kernel/locking/lockdep.c:594) 
[ 19.836103][ C3] mark_lock (kernel/locking/lockdep.c:4754) 
[ 19.836107][ C3] mark_usage (kernel/locking/lockdep.c:4643) 
[ 19.836111][ C3] __lock_acquire (kernel/locking/lockdep.c:5189) 
[ 19.836117][ C3] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 19.836119][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 19.836123][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 19.836128][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 19.836130][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 19.836134][ C3] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 19.836137][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 19.836139][ C3] simple_pin_fs (fs/libfs.c:1066) 
[ 19.836143][ C3] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 19.836146][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 19.836151][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 19.836154][ 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) 
[ 19.836159][ C3] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 19.836162][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 19.836165][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 19.836167][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 19.836172][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 19.836176][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 19.836179][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 19.836181][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 19.836183][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 19.836188][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 19.836191][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 19.836194][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 19.836199][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 19.836205][ C3] __put_net (net/core/net_namespace.c:732) 
[ 19.836210][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 19.836214][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 19.836217][ C3] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 19.836221][ C3] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 19.836225][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 19.836228][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 19.836232][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 19.836236][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 19.836240][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 19.836244][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 19.836249][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 19.836251][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 19.836254][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   19.836257][    C3]  </IRQ>
[   19.836258][    C3]  <TASK>
[ 19.836260][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 19.836262][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 19.836266][ 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
[   19.836269][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000246
[   19.836272][    C3] RAX: 000000000004a887 RBX: 1ffff9200002afc1 RCX: ffffffff9015ba19
[   19.836275][    C3] RDX: 0000000000000000 RSI: ffffffff90c87785 RDI: ffffffff90451260
[   19.836276][    C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c3667a
[   19.836278][    C3] R10: ffff8880361b33d3 R11: 0000000000000000 R12: 0000000000000000
[   19.836280][    C3] R13: ffff888001bf4640 R14: dffffc0000000000 R15: 0000000000000000
[ 19.836284][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 19.836288][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 19.836290][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 19.836293][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 19.836297][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 19.836301][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 19.836306][ C3] do_idle (kernel/sched/idle.c:325) 
[ 19.836310][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 19.836313][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 19.836317][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 19.836322][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   19.853375][    C3] RCU nest depth: 0, expected: 0
| [   19.853699][    C3] INFO: lockdep is turned off.
| [   19.853891][    C3] Preemption disabled at:
| [ 19.853893][ C3] 0x0 
[   19.854230][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   19.854233][    C3] Call Trace:
[   19.854235][    C3]  <IRQ>
[ 19.854237][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 19.854246][ C3] __might_resched (kernel/sched/core.c:8819) 
[ 19.854253][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 19.854258][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 19.854261][ C3] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 19.854265][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 19.854271][ 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) 
[ 19.854276][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 19.854279][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 19.854284][ 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) 
[ 19.854288][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 19.854291][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 19.854296][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 19.854299][ 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) 
[ 19.854304][ C3] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 19.854308][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 19.854312][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 19.854316][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 19.854322][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 19.854326][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 19.854330][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 19.854334][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 19.854337][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 19.854343][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 19.854347][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 19.854350][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 19.854355][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 19.854362][ C3] __put_net (net/core/net_namespace.c:732) 
[ 19.854365][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 19.854369][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 19.854372][ C3] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 19.854378][ C3] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 19.854385][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 19.854391][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 19.854396][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 19.854401][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 19.854408][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 19.854415][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 19.854420][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 19.854423][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 19.854425][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   19.854429][    C3]  </IRQ>
[   19.854430][    C3]  <TASK>
[ 19.854432][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 19.854434][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 19.854439][ 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
[   19.854442][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000246
[   19.854445][    C3] RAX: 000000000004a887 RBX: 1ffff9200002afc1 RCX: ffffffff9015ba19
[   19.854447][    C3] RDX: 0000000000000000 RSI: ffffffff90c87785 RDI: ffffffff90451260
[   19.854449][    C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c3667a
[   19.854451][    C3] R10: ffff8880361b33d3 R11: 0000000000000000 R12: 0000000000000000
[   19.854453][    C3] R13: ffff888001bf4640 R14: dffffc0000000000 R15: 0000000000000000
[ 19.854457][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 19.854461][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 19.854464][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 19.854466][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 19.854470][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 19.854474][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 19.854479][ C3] do_idle (kernel/sched/idle.c:325) 
[ 19.854483][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 19.854487][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 19.854493][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 19.854500][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   23.923109][    C0] INFO: lockdep is turned off.
| [   23.923298][    C0] Preemption disabled at:
| [ 23.923300][ C0] schedule_preempt_disabled (kernel/sched/core.c:6919) 
| [   23.923745][    C0] Tainted: [W]=WARN
[   23.923746][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   23.923748][    C0] Call Trace:
[   23.923751][    C0]  <IRQ>
[ 23.923752][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 23.923758][ C0] __might_resched (kernel/sched/core.c:8819) 
[ 23.923765][ C0] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 23.923769][ C0] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 23.923772][ C0] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 23.923776][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 23.923783][ 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) 
[ 23.923788][ C0] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 23.923791][ C0] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 23.923795][ 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) 
[ 23.923800][ C0] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 23.923803][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 23.923808][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 23.923811][ 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:2366) 
[ 23.923817][ C0] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 23.923821][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 23.923824][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 23.923828][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 23.923833][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 23.923836][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 23.923839][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 23.923842][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 23.923844][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 23.923849][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 23.923852][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 23.923855][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 23.923858][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 23.923864][ C0] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 23.923869][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 23.923874][ C0] __put_net (net/core/net_namespace.c:732) 
[ 23.923877][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 23.923881][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 23.923884][ C0] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 23.923889][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 23.923893][ C0] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 23.923898][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 23.923904][ C0] rcu_core (kernel/rcu/tree.c:2826) 
[ 23.923907][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 23.923912][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 23.923915][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 23.923917][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   23.923920][    C0]  </IRQ>
[   23.923922][    C0]  <TASK>
[ 23.923923][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 23.923926][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 23.923930][ C0] 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
[   23.923933][    C0] RSP: 0018:ffffffff90e07df8 EFLAGS: 00000246
[   23.923937][    C0] RAX: 0000000000000000 RBX: 1ffffffff21c0fc3 RCX: ffffffff9015ba19
[   23.923939][    C0] RDX: ffffed1006c0667b RSI: ffffffff904511e0 RDI: ffffffff8d98633f
[   23.923941][    C0] RBP: 0000000000000000 R08: 0000000000000000 R09: ffffed1006c0667a
[   23.923942][    C0] R10: ffff8880360333d3 R11: ffffffff93ab3438 R12: 0000000000000000
[   23.923944][    C0] R13: ffffffff90e1f240 R14: dffffc0000000000 R15: 0000000000014770
[ 23.923948][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 23.923951][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 23.923956][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 23.923958][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 23.923961][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 23.923964][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 23.923969][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 23.923975][ C0] do_idle (kernel/sched/idle.c:325) 
[ 23.923980][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 23.923983][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 23.923987][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 23.923991][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:501) 
[ 23.923996][ 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