======================================
| [   18.692353][    C0] 1 lock held by swapper/0/0:
| [ 18.692584][ C0] #0: ffffffffa75774c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2570) 
| [   18.692992][    C0]
| [   18.692992][    C0] stack backtrace:
[   18.693282][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   18.693284][    C0] Call Trace:
[   18.693286][    C0]  <IRQ>
[ 18.693288][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 18.693296][ C0] print_usage_bug.part.0 (kernel/locking/lockdep.c:4048) 
[ 18.693302][ C0] mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4059 kernel/locking/lockdep.c:4270) 
[ 18.693305][ C0] ? is_bpf_text_address (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 kernel/bpf/core.c:774) 
[ 18.693312][ C0] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 18.693316][ C0] ? save_trace (kernel/locking/lockdep.c:595) 
[ 18.693322][ C0] mark_lock (kernel/locking/lockdep.c:4756) 
[ 18.693326][ C0] mark_usage (kernel/locking/lockdep.c:4645) 
[ 18.693329][ C0] __lock_acquire (kernel/locking/lockdep.c:5194) 
[ 18.693332][ C0] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 18.693336][ C0] lock_acquire.part.0 (kernel/locking/lockdep.c:473 kernel/locking/lockdep.c:5873) 
[ 18.693340][ C0] ? simple_pin_fs (fs/libfs.c:1067) 
[ 18.693344][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 18.693350][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 18.693352][ C0] ? simple_pin_fs (fs/libfs.c:1067) 
[ 18.693357][ C0] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 18.693360][ C0] ? simple_pin_fs (fs/libfs.c:1067) 
[ 18.693364][ C0] simple_pin_fs (fs/libfs.c:1067) 
[ 18.693368][ C0] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 18.693371][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 18.693380][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 18.693383][ 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) 
[ 18.693391][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 18.693394][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 18.693397][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 18.693400][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 18.693407][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 18.693411][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 18.693414][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 18.693417][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 18.693420][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 18.693425][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 18.693427][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 18.693430][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 18.693433][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 18.693439][ C0] __put_net (net/core/net_namespace.c:732) 
[ 18.693444][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 18.693448][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 18.693450][ C0] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 18.693453][ C0] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 18.693458][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 18.693461][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 18.693464][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 18.693467][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 18.693472][ C0] rcu_core (kernel/rcu/tree.c:2834) 
[ 18.693478][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 18.693483][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 18.693486][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 18.693488][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   18.693492][    C0]  </IRQ>
[   18.693493][    C0]  <TASK>
[ 18.693495][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 18.693498][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 18.693502][ 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
[   18.693504][    C0] RSP: 0018:ffffffffa7207df8 EFLAGS: 00000246
[   18.693507][    C0] RAX: 00000000000793a9 RBX: 1ffffffff4e40fc3 RCX: ffffffffa65905d9
[   18.693510][    C0] RDX: 0000000000000000 RSI: ffffffffa708f4e4 RDI: ffffffffa6853be0
[   18.693511][    C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c066fa
[   18.693513][    C0] R10: ffff8880360337d3 R11: ffffffffa7211288 R12: 0000000000000000
[   18.693515][    C0] R13: ffffffffa721f240 R14: dffffc0000000000 R15: 0000000000014770
[ 18.693519][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 18.693524][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 18.693526][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 18.693529][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 18.693532][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 18.693536][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60) 
[ 18.693543][ C0] do_idle (kernel/sched/idle.c:325) 
[ 18.693546][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 18.693549][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 18.693553][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 18.693557][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:295) 
[ 18.693563][ C0] x86_64_start_kernel (arch/x86/kernel/head64.c:231 (discriminator 17)) 
[ 18.693567][ C0] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   18.714164][    C0] RCU nest depth: 0, expected: 0
| [   18.714364][    C0] INFO: lockdep is turned off.
| [   18.714564][    C0] Preemption disabled at:
| [ 18.714566][ C0] schedule_preempt_disabled (kernel/sched/core.c:6933) 
[   18.715285][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   18.715288][    C0] Call Trace:
[   18.715289][    C0]  <IRQ>
[ 18.715291][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 18.715298][ C0] __might_resched (kernel/sched/core.c:8796) 
[ 18.715307][ C0] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 18.715311][ C0] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 18.715314][ C0] ? simple_recursive_removal (fs/libfs.c:614) 
[ 18.715318][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 18.715323][ 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) 
[ 18.715329][ C0] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 18.715332][ 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) 
[ 18.715335][ C0] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 18.715341][ C0] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 18.715344][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 18.715350][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 18.715353][ 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) 
[ 18.715359][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 18.715362][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 18.715365][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 18.715370][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 18.715375][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 18.715379][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 18.715383][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 18.715385][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 18.715388][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 18.715392][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 18.715394][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 18.715397][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 18.715400][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 18.715407][ C0] __put_net (net/core/net_namespace.c:732) 
[ 18.715411][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 18.715415][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 18.715417][ C0] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 18.715421][ C0] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 18.715426][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 18.715430][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 18.715434][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 18.715437][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 18.715442][ C0] rcu_core (kernel/rcu/tree.c:2834) 
[ 18.715446][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 18.715451][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 18.715455][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 18.715457][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   18.715461][    C0]  </IRQ>
[   18.715462][    C0]  <TASK>
[ 18.715463][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 18.715466][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 18.715470][ 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
[   18.715473][    C0] RSP: 0018:ffffffffa7207df8 EFLAGS: 00000246
[   18.715476][    C0] RAX: 00000000000793a9 RBX: 1ffffffff4e40fc3 RCX: ffffffffa65905d9
[   18.715478][    C0] RDX: 0000000000000000 RSI: ffffffffa708f4e4 RDI: ffffffffa6853be0
[   18.715480][    C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c066fa
[   18.715482][    C0] R10: ffff8880360337d3 R11: ffffffffa7211288 R12: 0000000000000000
[   18.715483][    C0] R13: ffffffffa721f240 R14: dffffc0000000000 R15: 0000000000014770
[ 18.715487][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 18.715492][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 18.715495][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 18.715497][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 18.715501][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 18.715504][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60) 
[ 18.715510][ C0] do_idle (kernel/sched/idle.c:325) 
[ 18.715513][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 18.715516][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 18.715520][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 18.715524][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:295) 
[ 18.715528][ C0] x86_64_start_kernel (arch/x86/kernel/head64.c:231 (discriminator 17)) 
[ 18.715532][ C0] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   21.585335][    C3] INFO: lockdep is turned off.
| [   21.585689][    C3] Preemption disabled at:
| [ 21.585693][ C3] handle_softirqs (kernel/softirq.c:553) 
| [   21.586426][    C3] Tainted: [W]=WARN
[   21.586428][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   21.586432][    C3] Call Trace:
[   21.586435][    C3]  <IRQ>
[ 21.586439][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 21.586453][ C3] __might_resched (kernel/sched/core.c:8796) 
[ 21.586466][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 21.586474][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 21.586479][ C3] ? simple_recursive_removal (fs/libfs.c:614) 
[ 21.586487][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.586496][ 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) 
[ 21.586505][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 21.586510][ 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) 
[ 21.586516][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 21.586525][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 21.586531][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 21.586541][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 21.586547][ 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) 
[ 21.586556][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 21.586562][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 21.586567][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 21.586574][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 21.586582][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 21.586588][ C3] ? unwind_next_frame (arch/x86/kernel/unwind_orc.c:590) 
[ 21.586595][ C3] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 21.586602][ C3] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 21.586607][ C3] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 21.586615][ C3] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 21.586621][ C3] ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3092) 
[ 21.586628][ C3] ? kmem_cache_free (./include/linux/kmemleak.h:49 mm/slub.c:2305 mm/slub.c:4642 mm/slub.c:4744) 
[ 21.586636][ C3] ? unlink_anon_vmas (mm/rmap.c:405 (discriminator 2)) 
[ 21.586644][ C3] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 21.586651][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.586659][ C3] __put_net (net/core/net_namespace.c:732) 
[ 21.586665][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 21.586672][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 21.586676][ C3] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 21.586686][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 21.586692][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.586697][ C3] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 21.586709][ C3] rcu_core (kernel/rcu/tree.c:2834) 
[ 21.586715][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 21.586723][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 21.586728][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 21.586733][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   21.586739][    C3]  </IRQ>
[   21.586741][    C3]  <TASK>
[ 21.586744][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 21.586750][ C3] RIP: 0010:unwind_next_frame (arch/x86/kernel/unwind_orc.c:590) 
[ 21.586756][ C3] Code: fc ff df 4c 89 e1 48 c1 e9 03 80 3c 11 00 0f 85 8b 11 00 00 48 8b 14 24 49 89 45 58 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 23 11 00 00 48 8b 44 24 28 48 8b 54 24 08 49 89
All code
========
   0:	fc                   	cld
   1:	ff                   	lcall  (bad)
   2:	df 4c 89 e1          	fisttps -0x1f(%rcx,%rcx,4)
   6:	48 c1 e9 03          	shr    $0x3,%rcx
   a:	80 3c 11 00          	cmpb   $0x0,(%rcx,%rdx,1)
   e:	0f 85 8b 11 00 00    	jne    0x119f
  14:	48 8b 14 24          	mov    (%rsp),%rdx
  18:	49 89 45 58          	mov    %rax,0x58(%r13)
  1c:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  23:	fc ff df 
  26:	48 c1 ea 03          	shr    $0x3,%rdx
  2a:*	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)		<-- trapping instruction
  2e:	0f 85 23 11 00 00    	jne    0x1157
  34:	48 8b 44 24 28       	mov    0x28(%rsp),%rax
  39:	48 8b 54 24 08       	mov    0x8(%rsp),%rdx
  3e:	49                   	rex.WB
  3f:	89                   	.byte 0x89

Code starting with the faulting instruction
===========================================
   0:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   4:	0f 85 23 11 00 00    	jne    0x112d
   a:	48 8b 44 24 28       	mov    0x28(%rsp),%rax
   f:	48 8b 54 24 08       	mov    0x8(%rsp),%rdx
  14:	49                   	rex.WB
  15:	89                   	.byte 0x89
[   21.586761][    C3] RSP: 0018:ffffc900006b75e8 EFLAGS: 00000a02
[   21.586768][    C3] RAX: dffffc0000000000 RBX: 1ffff920000d6ec6 RCX: 1ffff920000d6ee8
[   21.586772][    C3] RDX: 1ffff920000d6ee6 RSI: ffffc900006b7718 RDI: ffff88800a678040
[   21.586775][    C3] RBP: 0000000000000001 R08: 0000000000000000 R09: ffffc900006b7729
[   21.586778][    C3] R10: ffffffffa3c12687 R11: ffffc900006b7728 R12: ffffc900006b7740
[   21.586781][    C3] R13: ffffc900006b76e8 R14: ffffffffa8480140 R15: ffffc900006b7b48
[ 21.586788][ 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) 
[ 21.586798][ C3] ? unwind_next_frame (./arch/x86/include/asm/unwind.h:111 ./arch/x86/include/asm/unwind.h:127 arch/x86/kernel/unwind_orc.c:588) 
[ 21.586803][ C3] ? unlink_anon_vmas (mm/rmap.c:405 (discriminator 2)) 
[ 21.586810][ C3] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 21.586817][ C3] ? unlink_anon_vmas (mm/rmap.c:405 (discriminator 2)) 
[ 21.586821][ C3] ? kernel_text_address (kernel/extable.c:99) 
[ 21.586827][ C3] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 21.586833][ C3] arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 21.586843][ C3] ? free_pgtables (./include/linux/hugetlb_inline.h:11 mm/memory.c:372) 
[ 21.586853][ C3] stack_trace_save (kernel/stacktrace.c:123) 
[ 21.586858][ C3] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 21.586864][ C3] ? __pfx___alloc_frozen_pages_noprof (mm/page_alloc.c:4936) 
[ 21.586874][ C3] kasan_save_stack (mm/kasan/common.c:48) 
[ 21.586880][ C3] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 21.586884][ C3] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 21.586889][ C3] ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3092) 
[ 21.586894][ C3] ? kmem_cache_free (./include/linux/kmemleak.h:49 mm/slub.c:2305 mm/slub.c:4642 mm/slub.c:4744) 
[ 21.586900][ C3] ? unlink_anon_vmas (mm/rmap.c:405 (discriminator 2)) 
[ 21.586904][ C3] ? kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 21.586908][ C3] ? kasan_save_free_info (mm/kasan/generic.c:579) 
[ 21.586915][ C3] ? __kasan_slab_free (mm/kasan/common.c:271) 
[ 21.586921][ C3] ? kmem_cache_free (mm/slub.c:4642 mm/slub.c:4744) 
[ 21.586925][ C3] ? unlink_anon_vmas (mm/rmap.c:439) 
[ 21.586929][ C3] ? free_pgtables (mm/memory.c:392) 
[ 21.586935][ C3] ? do_raw_spin_lock (./arch/x86/include/asm/atomic.h:107 ./include/linux/atomic/atomic-arch-fallback.h:2170 ./include/linux/atomic/atomic-instrumented.h:1302 ./include/asm-generic/qspinlock.h:111 kernel/locking/spinlock_debug.c:116) 
[ 21.586942][ C3] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 21.586948][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.586955][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.586960][ C3] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 21.586967][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 21.586976][ C3] ? debug_object_active_state (lib/debugobjects.c:1056) 
[ 21.586986][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.586991][ C3] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2126 arch/x86/mm/physaddr.c:65) 
[ 21.586998][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.587003][ C3] ? trace_lock_release (./include/trace/events/lock.h:69 (discriminator 21)) 
[ 21.587011][ C3] ? lock_release (kernel/locking/lockdep.c:118 kernel/locking/lockdep.c:5884) 
[ 21.587017][ C3] ? __virt_addr_valid (./arch/x86/include/asm/preempt.h:104 ./include/linux/rcupdate.h:955 ./include/linux/mmzone.h:2126 arch/x86/mm/physaddr.c:65) 
[ 21.587022][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.587028][ C3] kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 21.587033][ C3] ? __pfx_free_object_rcu (mm/kmemleak.c:524) 
[ 21.587040][ C3] __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3092) 
[ 21.587047][ C3] kmem_cache_free (./include/linux/kmemleak.h:49 mm/slub.c:2305 mm/slub.c:4642 mm/slub.c:4744) 
[ 21.587053][ C3] ? unlink_anon_vmas (mm/rmap.c:405 (discriminator 2)) 
[ 21.587059][ C3] unlink_anon_vmas (mm/rmap.c:405 (discriminator 2)) 
[ 21.587065][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.587073][ C3] free_pgtables (./include/linux/hugetlb_inline.h:11 mm/memory.c:372) 
[ 21.587083][ C3] ? __pfx_free_pgtables (mm/memory.c:349) 
[ 21.587088][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 21.587093][ C3] ? exit_mmap (./include/linux/seqlock.h:431 ./include/linux/mmap_lock.h:83 ./include/linux/mmap_lock.h:130 mm/mmap.c:1292) 
[ 21.587103][ 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) 
[ 21.587109][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 21.587114][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.587119][ C3] ? trace_lock_release (./include/trace/events/lock.h:69 (discriminator 21)) 
[ 21.587127][ C3] exit_mmap (mm/mmap.c:1297) 
[ 21.587136][ C3] ? __pfx_exit_mmap (mm/mmap.c:1259) 
[ 21.587142][ C3] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:727 kernel/locking/mutex.c:746) 
[ 21.587150][ C3] ? lock_release (kernel/locking/lockdep.c:118 kernel/locking/lockdep.c:5884) 
[ 21.587155][ 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) 
[ 21.587172][ C3] mmput (kernel/fork.c:1449 kernel/fork.c:1383 kernel/fork.c:1404) 
[ 21.587180][ C3] exit_mm (kernel/exit.c:596) 
[ 21.587187][ C3] do_exit (kernel/exit.c:950) 
[ 21.587196][ C3] do_group_exit (kernel/exit.c:1089) 
[ 21.587203][ C3] __x64_sys_exit_group (kernel/exit.c:1117) 
[ 21.587209][ C3] x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 21.587218][ C3] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 21.587225][ C3] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   21.587230][    C3] RIP: 0033:0x7f8a42465abd
[ 21.587236][ C3] Code: Unable to access opcode bytes at 0x7f8a42465a93.

Code starting with the faulting instruction
===========================================
[   21.587239][    C3] RSP: 002b:00007ffe6215bf88 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   21.587244][    C3] RAX: ffffffffffffffda RBX: 00007f8a425429c0 RCX: 00007f8a42465abd
[   21.587248][    C3] RDX: 00000000000000e7 RSI: ffffffffffffff80 RDI: 0000000000000000
[   21.587252][    C3] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000030
[   21.587255][    C3] R10: 00007ffe6215be10 R11: 0000000000000246 R12: 00007f8a425429c0


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