======================================
| [   14.858978][    C0] 1 lock held by swapper/0/0:
| [ 14.859185][ C0] #0: ffffffffa95774c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2570) 
| [   14.859549][    C0]
| [   14.859549][    C0] stack backtrace:
[   14.859813][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   14.859815][    C0] Call Trace:
[   14.859817][    C0]  <IRQ>
[ 14.859819][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 14.859825][ C0] print_usage_bug.part.0 (kernel/locking/lockdep.c:4048) 
[ 14.859829][ C0] mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4059 kernel/locking/lockdep.c:4270) 
[ 14.859833][ C0] ? is_bpf_text_address (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 kernel/bpf/core.c:774) 
[ 14.859838][ C0] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 14.859842][ C0] ? save_trace (kernel/locking/lockdep.c:595) 
[ 14.859848][ C0] mark_lock (kernel/locking/lockdep.c:4756) 
[ 14.859852][ C0] mark_usage (kernel/locking/lockdep.c:4645) 
[ 14.859854][ C0] __lock_acquire (kernel/locking/lockdep.c:5194) 
[ 14.859858][ C0] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 14.859862][ C0] lock_acquire.part.0 (kernel/locking/lockdep.c:473 kernel/locking/lockdep.c:5873) 
[ 14.859865][ C0] ? simple_pin_fs (fs/libfs.c:1067) 
[ 14.859869][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 14.859873][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 14.859876][ C0] ? simple_pin_fs (fs/libfs.c:1067) 
[ 14.859880][ C0] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 14.859883][ C0] ? simple_pin_fs (fs/libfs.c:1067) 
[ 14.859887][ C0] simple_pin_fs (fs/libfs.c:1067) 
[ 14.859891][ C0] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 14.859894][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 14.859900][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 14.859903][ 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:2376) 
[ 14.859909][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 14.859911][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 14.859914][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 14.859917][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 14.859922][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.859925][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 14.859929][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 14.859931][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 14.859934][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 14.859937][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 14.859939][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 14.859941][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 14.859944][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 14.859949][ C0] __put_net (net/core/net_namespace.c:732) 
[ 14.859953][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 14.859957][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 14.859959][ C0] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 14.859962][ C0] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 14.859966][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 14.859970][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 14.859973][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 14.859976][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 14.859981][ C0] rcu_core (kernel/rcu/tree.c:2834) 
[ 14.859985][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 14.859991][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 14.859993][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 14.859996][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   14.860000][    C0]  </IRQ>
[   14.860001][    C0]  <TASK>
[ 14.860002][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.860005][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 14.860009][ C0] Code: 92 b5 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 83 37 10 00 fb f4 <e9> fc 54 02 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
All code
========
   0:	92                   	xchg   %eax,%edx
   1:	b5 00                	mov    $0x0,%ch
   3:	c3                   	ret
   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 83 37 10 00 	verw   0x103783(%rip)        # 0x1037ab
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	e9 fc 54 02 00       	jmp    0x2552b		<-- trapping instruction
  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:	e9 fc 54 02 00       	jmp    0x25501
   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
[   14.860012][    C0] RSP: 0000:ffffffffa9207df8 EFLAGS: 00000246
[   14.860015][    C0] RAX: 0000000000072771 RBX: 1ffffffff5240fc3 RCX: ffffffffa85905d9
[   14.860017][    C0] RDX: 0000000000000000 RSI: ffffffffa908f4e4 RDI: ffffffffa8853be0
[   14.860019][    C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1005e866fa
[   14.860020][    C0] R10: ffff88802f4337d3 R11: ffffffffa9211288 R12: 0000000000000000
[   14.860022][    C0] R13: ffffffffa921f240 R14: dffffc0000000000 R15: 0000000000014770
[ 14.860026][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 14.860030][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 14.860033][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 14.860035][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 14.860039][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 14.860042][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60) 
[ 14.860047][ C0] do_idle (kernel/sched/idle.c:325) 
[ 14.860051][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 14.860054][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 14.860057][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 14.860061][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:295) 
[ 14.860066][ C0] x86_64_start_kernel (arch/x86/kernel/head64.c:231 (discriminator 17)) 
[ 14.860069][ C0] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   14.879035][    C0] RCU nest depth: 0, expected: 0
| [   14.879226][    C0] INFO: lockdep is turned off.
| [   14.879425][    C0] Preemption disabled at:
| [ 14.879427][ C0] schedule_preempt_disabled (kernel/sched/core.c:6933) 
[   14.879867][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   14.879868][    C0] Call Trace:
[   14.879870][    C0]  <IRQ>
[ 14.879871][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 14.879877][ C0] __might_resched (kernel/sched/core.c:8796) 
[ 14.879883][ C0] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 14.879887][ C0] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 14.879890][ C0] ? simple_recursive_removal (fs/libfs.c:614) 
[ 14.879894][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 14.879899][ 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) 
[ 14.879904][ C0] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 14.879907][ 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) 
[ 14.879910][ C0] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 14.879915][ C0] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 14.879918][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 14.879923][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 14.879927][ 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:2376) 
[ 14.879931][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 14.879934][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 14.879937][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 14.879941][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 14.879946][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.879950][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 14.879953][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 14.879956][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 14.879958][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 14.879961][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 14.879964][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 14.879966][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 14.879969][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 14.879976][ C0] __put_net (net/core/net_namespace.c:732) 
[ 14.879979][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 14.879983][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 14.879986][ C0] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 14.879989][ C0] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 14.879994][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 14.879998][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 14.880002][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 14.880004][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 14.880009][ C0] rcu_core (kernel/rcu/tree.c:2834) 
[ 14.880014][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 14.880019][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 14.880022][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 14.880025][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   14.880028][    C0]  </IRQ>
[   14.880029][    C0]  <TASK>
[ 14.880031][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.880033][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 14.880037][ C0] Code: 92 b5 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 83 37 10 00 fb f4 <e9> fc 54 02 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
All code
========
   0:	92                   	xchg   %eax,%edx
   1:	b5 00                	mov    $0x0,%ch
   3:	c3                   	ret
   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 83 37 10 00 	verw   0x103783(%rip)        # 0x1037ab
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	e9 fc 54 02 00       	jmp    0x2552b		<-- trapping instruction
  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:	e9 fc 54 02 00       	jmp    0x25501
   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
[   14.880040][    C0] RSP: 0000:ffffffffa9207df8 EFLAGS: 00000246
[   14.880043][    C0] RAX: 0000000000072771 RBX: 1ffffffff5240fc3 RCX: ffffffffa85905d9
[   14.880045][    C0] RDX: 0000000000000000 RSI: ffffffffa908f4e4 RDI: ffffffffa8853be0
[   14.880047][    C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1005e866fa
[   14.880048][    C0] R10: ffff88802f4337d3 R11: ffffffffa9211288 R12: 0000000000000000
[   14.880050][    C0] R13: ffffffffa921f240 R14: dffffc0000000000 R15: 0000000000014770
[ 14.880054][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 14.880058][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 14.880061][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 14.880064][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 14.880067][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 14.880071][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60) 
[ 14.880076][ C0] do_idle (kernel/sched/idle.c:325) 
[ 14.880079][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 14.880082][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 14.880086][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 14.880090][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:295) 
[ 14.880094][ C0] x86_64_start_kernel (arch/x86/kernel/head64.c:231 (discriminator 17)) 
[ 14.880098][ C0] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   16.486949][    C3] INFO: lockdep is turned off.
| [   16.487158][    C3] Preemption disabled at:
| [ 16.487160][ C3] handle_softirqs (kernel/softirq.c:553) 
| [   16.487598][    C3] Tainted: [W]=WARN
[   16.487599][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.487601][    C3] Call Trace:
[   16.487603][    C3]  <IRQ>
[ 16.487605][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 16.487613][ C3] __might_resched (kernel/sched/core.c:8796) 
[ 16.487620][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 16.487624][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 16.487627][ C3] ? simple_recursive_removal (fs/libfs.c:614) 
[ 16.487631][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.487636][ 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) 
[ 16.487642][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 16.487645][ 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) 
[ 16.487648][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 16.487654][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 16.487657][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 16.487663][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 16.487666][ 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:2376) 
[ 16.487672][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.487675][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 16.487678][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 16.487681][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 16.487687][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.487690][ C3] ? unwind_next_frame (arch/x86/kernel/unwind_orc.c:512) 
[ 16.487694][ C3] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 16.487699][ C3] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 16.487703][ C3] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 16.487708][ C3] ? kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 16.487711][ C3] ? __kasan_slab_alloc (mm/kasan/common.c:348) 
[ 16.487714][ C3] ? kmem_cache_alloc_noprof (./include/linux/kasan.h:250 mm/slub.c:4147 mm/slub.c:4196 mm/slub.c:4203) 
[ 16.487719][ C3] ? __alloc_object (mm/kmemleak.c:481 mm/kmemleak.c:661) 
[ 16.487724][ C3] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 16.487728][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.487732][ C3] __put_net (net/core/net_namespace.c:732) 
[ 16.487736][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 16.487740][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.487742][ C3] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.487747][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 16.487750][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.487753][ C3] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 16.487760][ C3] rcu_core (kernel/rcu/tree.c:2834) 
[ 16.487765][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 16.487770][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 16.487773][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 16.487776][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   16.487780][    C3]  </IRQ>
[   16.487781][    C3]  <TASK>
[ 16.487783][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.487786][ C3] RIP: 0010:unwind_next_frame (arch/x86/kernel/unwind_orc.c:512) 
[ 16.487790][ C3] Code: 41 0f b6 46 05 83 e0 07 0f 84 f1 01 00 00 3c 01 0f 84 11 02 00 00 49 8d 76 04 4c 89 f9 48 b8 00 00 00 00 00 fc ff df 48 89 f2 <48> c1 e9 03 48 89 74 24 20 48 c1 ea 03 0f b6 14 02 0f b6 04 01 48
All code
========
   0:	41 0f b6 46 05       	movzbl 0x5(%r14),%eax
   5:	83 e0 07             	and    $0x7,%eax
   8:	0f 84 f1 01 00 00    	je     0x1ff
   e:	3c 01                	cmp    $0x1,%al
  10:	0f 84 11 02 00 00    	je     0x227
  16:	49 8d 76 04          	lea    0x4(%r14),%rsi
  1a:	4c 89 f9             	mov    %r15,%rcx
  1d:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  24:	fc ff df 
  27:	48 89 f2             	mov    %rsi,%rdx
  2a:*	48 c1 e9 03          	shr    $0x3,%rcx		<-- trapping instruction
  2e:	48 89 74 24 20       	mov    %rsi,0x20(%rsp)
  33:	48 c1 ea 03          	shr    $0x3,%rdx
  37:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
  3b:	0f b6 04 01          	movzbl (%rcx,%rax,1),%eax
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	48 c1 e9 03          	shr    $0x3,%rcx
   4:	48 89 74 24 20       	mov    %rsi,0x20(%rsp)
   9:	48 c1 ea 03          	shr    $0x3,%rdx
   d:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
  11:	0f b6 04 01          	movzbl (%rcx,%rax,1),%eax
  15:	48                   	rex.W
[   16.487792][    C3] RSP: 0018:ffffc90000aa74c8 EFLAGS: 00000202
[   16.487796][    C3] RAX: dffffc0000000000 RBX: 1ffff92000154ea2 RCX: ffffffffaa48b11f
[   16.487798][    C3] RDX: ffffffffaa48b11e RSI: ffffffffaa48b11e RDI: ffffffffaa106b0c
[   16.487800][    C3] RBP: 0000000000000001 R08: 0000000000000000 R09: ffffc90000aa7609
[   16.487802][    C3] R10: ffffffffa5c12687 R11: ffffc90000aa7608 R12: ffffc90000aa7620
[   16.487803][    C3] R13: ffffc90000aa75c8 R14: ffffffffaa48b11a R15: ffffffffaa48b11f
[ 16.487806][ C3] ? unwind_next_frame (./include/linux/rcupdate.h:331 ./include/linux/rcupdate.h:841 ./include/linux/rcupdate.h:1155 arch/x86/kernel/unwind_orc.c:479) 
[ 16.487812][ C3] ? unwind_next_frame (arch/x86/kernel/unwind_orc.c:495) 
[ 16.487815][ C3] ? kmem_cache_free (mm/slub.c:2333 mm/slub.c:4642 mm/slub.c:4744) 
[ 16.487820][ C3] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 16.487824][ C3] ? kmem_cache_free (mm/slub.c:2333 mm/slub.c:4642 mm/slub.c:4744) 
[ 16.487827][ C3] ? kernel_text_address (kernel/extable.c:99) 
[ 16.487831][ C3] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 16.487834][ C3] arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 16.487840][ C3] ? kmem_cache_free (mm/slub.c:2333 mm/slub.c:4642 mm/slub.c:4744) 
[ 16.487844][ C3] stack_trace_save (kernel/stacktrace.c:123) 
[ 16.487847][ C3] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 16.487850][ C3] ? is_bpf_text_address (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 kernel/bpf/core.c:774) 
[ 16.487855][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.487858][ C3] kasan_save_stack (mm/kasan/common.c:48) 
[ 16.487861][ C3] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 16.487864][ C3] ? kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 16.487867][ C3] ? __kasan_slab_alloc (mm/kasan/common.c:348) 
[ 16.487869][ C3] ? kmem_cache_alloc_noprof (./include/linux/kasan.h:250 mm/slub.c:4147 mm/slub.c:4196 mm/slub.c:4203) 
[ 16.487872][ C3] ? __alloc_object (mm/kmemleak.c:481 mm/kmemleak.c:661) 
[ 16.487875][ C3] ? __create_object (mm/kmemleak.c:770) 
[ 16.487878][ C3] ? __kmalloc_cache_noprof (./include/linux/kmemleak.h:43 mm/slub.c:4151 mm/slub.c:4196 mm/slub.c:4353) 
[ 16.487882][ C3] ? kmem_cache_free (mm/slub.c:2333 mm/slub.c:4642 mm/slub.c:4744) 
[ 16.487885][ C3] ? check_bytes_and_report (mm/slub.c:1212) 
[ 16.487890][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.487893][ C3] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 16.487897][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 16.487902][ C3] ? get_partial_node.part.0 (mm/slub.c:2902) 
[ 16.487907][ C3] ? ___slab_alloc (mm/slub.c:2863 mm/slub.c:2980 mm/slub.c:3838) 
[ 16.487910][ C3] ? __alloc_object (mm/kmemleak.c:481 mm/kmemleak.c:661) 
[ 16.487913][ C3] ? kmem_cache_free (./arch/x86/include/asm/jump_label.h:36 ./include/linux/page-flags.h:206 ./include/linux/page-flags.h:284 ./include/linux/mm.h:1404 mm/slab.h:211 mm/slub.c:4744) 
[ 16.487916][ C3] ? __put_anon_vma (mm/rmap.c:2757) 
[ 16.487921][ C3] ? __alloc_object (mm/kmemleak.c:481 mm/kmemleak.c:661) 
[ 16.487925][ C3] kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 16.487928][ C3] __kasan_slab_alloc (mm/kasan/common.c:348) 
[ 16.487932][ C3] kmem_cache_alloc_noprof (./include/linux/kasan.h:250 mm/slub.c:4147 mm/slub.c:4196 mm/slub.c:4203) 
[ 16.487935][ C3] ? kmem_cache_free (mm/slub.c:2333 mm/slub.c:4642 mm/slub.c:4744) 
[ 16.487939][ C3] __alloc_object (mm/kmemleak.c:481 mm/kmemleak.c:661) 
[ 16.487943][ C3] __create_object (mm/kmemleak.c:770) 
[ 16.487947][ C3] __kmalloc_cache_noprof (./include/linux/kmemleak.h:43 mm/slub.c:4151 mm/slub.c:4196 mm/slub.c:4353) 
[ 16.487952][ C3] kmem_cache_free (mm/slub.c:2333 mm/slub.c:4642 mm/slub.c:4744) 
[ 16.487956][ C3] ? __put_anon_vma (mm/rmap.c:2757) 
[ 16.487960][ C3] __put_anon_vma (mm/rmap.c:2757) 
[ 16.487963][ C3] unlink_anon_vmas (./include/linux/rmap.h:117 mm/rmap.c:444) 
[ 16.487966][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.487970][ C3] free_pgtables (mm/memory.c:392) 
[ 16.487976][ C3] ? __pfx_free_pgtables (mm/memory.c:349) 
[ 16.487979][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 16.487982][ C3] ? exit_mmap (./include/linux/seqlock.h:431 ./include/linux/mmap_lock.h:83 ./include/linux/mmap_lock.h:130 mm/mmap.c:1292) 
[ 16.487987][ C3] ? down_write (./arch/x86/include/asm/preempt.h:104 kernel/locking/rwsem.c:1307 kernel/locking/rwsem.c:1313 kernel/locking/rwsem.c:1578) 
[ 16.487990][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 16.487993][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.487996][ C3] ? trace_lock_release (./include/trace/events/lock.h:69 (discriminator 21)) 
[ 16.488002][ C3] exit_mmap (mm/mmap.c:1297) 
[ 16.488007][ C3] ? __pfx_exit_mmap (mm/mmap.c:1259) 
[ 16.488010][ C3] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:727 kernel/locking/mutex.c:746) 
[ 16.488014][ C3] ? lock_release (kernel/locking/lockdep.c:118 kernel/locking/lockdep.c:5884) 
[ 16.488017][ C3] ? __mutex_unlock_slowpath (./arch/x86/include/asm/atomic64_64.h:101 ./include/linux/atomic/atomic-arch-fallback.h:4329 ./include/linux/atomic/atomic-long.h:1506 ./include/linux/atomic/atomic-instrumented.h:4481 kernel/locking/mutex.c:924) 
[ 16.488026][ C3] mmput (kernel/fork.c:1449 kernel/fork.c:1383 kernel/fork.c:1404) 
[ 16.488030][ C3] exit_mm (kernel/exit.c:596) 
[ 16.488034][ C3] do_exit (kernel/exit.c:950) 
[ 16.488038][ C3] do_group_exit (kernel/exit.c:1089) 
[ 16.488042][ C3] __x64_sys_exit_group (kernel/exit.c:1117) 
[ 16.488046][ C3] x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 16.488050][ C3] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 16.488054][ C3] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   16.488056][    C3] RIP: 0033:0x7f7b959b3abd
[ 16.488060][ C3] Code: Unable to access opcode bytes at 0x7f7b959b3a93.

Code starting with the faulting instruction
===========================================
[   16.488061][    C3] RSP: 002b:00007ffc857393a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   16.488064][    C3] RAX: ffffffffffffffda RBX: 00007f7b95a909c0 RCX: 00007f7b959b3abd
[   16.488066][    C3] RDX: 00000000000000e7 RSI: ffffffffffffff80 RDI: 0000000000000000
[   16.488067][    C3] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000030
[   16.488069][    C3] R10: 00007ffc85739230 R11: 0000000000000246 R12: 00007f7b95a909c0


Finger prints:
mark_lock_irq:mark_lock:mark_usage:__lock_acquire:_raw_spin_lock
handle_softirqs:dump_stack_lvl:__might_resched:down_write:simple_recursive_removal
schedule_preempt_disabled:dump_stack_lvl:__might_resched:down_write:simple_recursive_removal