======================================
| [   14.859418][    C3] 1 lock held by swapper/3/0:
| [ 14.859606][ C3] #0: ffffffffa87774c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2570) 
| [   14.859944][    C3]
| [   14.859944][    C3] stack backtrace:
[   14.860180][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   14.860182][    C3] Call Trace:
[   14.860183][    C3]  <IRQ>
[ 14.860186][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 14.860192][ C3] print_usage_bug.part.0 (kernel/locking/lockdep.c:4048) 
[ 14.860196][ C3] mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4059 kernel/locking/lockdep.c:4270) 
[ 14.860201][ C3] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 14.860205][ C3] ? save_trace (kernel/locking/lockdep.c:595) 
[ 14.860211][ C3] mark_lock (kernel/locking/lockdep.c:4756) 
[ 14.860215][ C3] mark_usage (kernel/locking/lockdep.c:4645) 
[ 14.860218][ C3] __lock_acquire (kernel/locking/lockdep.c:5194) 
[ 14.860221][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 14.860225][ C3] lock_acquire.part.0 (kernel/locking/lockdep.c:473 kernel/locking/lockdep.c:5873) 
[ 14.860228][ C3] ? simple_pin_fs (fs/libfs.c:1067) 
[ 14.860232][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 14.860236][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 14.860239][ C3] ? simple_pin_fs (fs/libfs.c:1067) 
[ 14.860244][ C3] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 14.860247][ C3] ? simple_pin_fs (fs/libfs.c:1067) 
[ 14.860250][ C3] simple_pin_fs (fs/libfs.c:1067) 
[ 14.860254][ C3] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 14.860257][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 14.860263][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 14.860267][ 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) 
[ 14.860272][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 14.860275][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 14.860278][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 14.860281][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 14.860285][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.860289][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 14.860292][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 14.860294][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 14.860297][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 14.860300][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 14.860302][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 14.860305][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 14.860308][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 14.860315][ C3] __put_net (net/core/net_namespace.c:732) 
[ 14.860319][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 14.860323][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 14.860325][ C3] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 14.860330][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 14.860333][ C3] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 14.860336][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 14.860339][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 14.860344][ C3] rcu_core (kernel/rcu/tree.c:2834) 
[ 14.860348][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 14.860353][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 14.860356][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 14.860359][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   14.860363][    C3]  </IRQ>
[   14.860364][    C3]  <TASK>
[ 14.860365][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.860368][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 14.860372][ C3] 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
[   14.860375][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000246
[   14.860378][    C3] RAX: 000000000004b3cf RBX: 1ffff9200002afc1 RCX: ffffffffa77905d9
[   14.860380][    C3] RDX: 0000000000000000 RSI: ffffffffa828f4e4 RDI: ffffffffa7a53be0
[   14.860382][    C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c366fa
[   14.860384][    C3] R10: ffff8880361b37d3 R11: ffffffffa8411288 R12: 0000000000000000
[   14.860385][    C3] R13: ffff888001bf45c0 R14: dffffc0000000000 R15: 0000000000000000
[ 14.860389][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 14.860394][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 14.860396][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 14.860399][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 14.860402][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 14.860406][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60) 
[ 14.860410][ C3] do_idle (kernel/sched/idle.c:325) 
[ 14.860413][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 14.860416][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 14.860419][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 14.860424][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   14.876018][    C3] RCU nest depth: 0, expected: 0
| [   14.876188][    C3] INFO: lockdep is turned off.
| [   14.876465][    C3] Preemption disabled at:
| [ 14.876466][ C3] 0x0 
[   14.876786][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   14.876788][    C3] Call Trace:
[   14.876789][    C3]  <IRQ>
[ 14.876791][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 14.876797][ C3] __might_resched (kernel/sched/core.c:8796) 
[ 14.876804][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 14.876809][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 14.876811][ C3] ? simple_recursive_removal (fs/libfs.c:614) 
[ 14.876815][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 14.876819][ 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) 
[ 14.876825][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 14.876828][ 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) 
[ 14.876831][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 14.876836][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 14.876839][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 14.876844][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 14.876847][ 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) 
[ 14.876852][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 14.876854][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 14.876858][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 14.876861][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 14.876866][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.876869][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 14.876872][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 14.876875][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 14.876877][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 14.876880][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 14.876883][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 14.876885][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 14.876888][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 14.876895][ C3] __put_net (net/core/net_namespace.c:732) 
[ 14.876898][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 14.876902][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 14.876904][ C3] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 14.876909][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 14.876912][ C3] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 14.876916][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 14.876919][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 14.876924][ C3] rcu_core (kernel/rcu/tree.c:2834) 
[ 14.876928][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 14.876933][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 14.876936][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 14.876939][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   14.876943][    C3]  </IRQ>
[   14.876944][    C3]  <TASK>
[ 14.876945][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.876948][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 14.876952][ C3] 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
[   14.876954][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000246
[   14.876957][    C3] RAX: 000000000004b3cf RBX: 1ffff9200002afc1 RCX: ffffffffa77905d9
[   14.876959][    C3] RDX: 0000000000000000 RSI: ffffffffa828f4e4 RDI: ffffffffa7a53be0
[   14.876961][    C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c366fa
[   14.876962][    C3] R10: ffff8880361b37d3 R11: ffffffffa8411288 R12: 0000000000000000
[   14.876964][    C3] R13: ffff888001bf45c0 R14: dffffc0000000000 R15: 0000000000000000
[ 14.876967][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 14.876972][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 14.876975][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 14.876977][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 14.876980][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 14.876984][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60) 
[ 14.876988][ C3] do_idle (kernel/sched/idle.c:325) 
[ 14.876991][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 14.876994][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 14.876997][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 14.877002][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   16.612152][    C2] INFO: lockdep is turned off.
| [   16.612341][    C2] Preemption disabled at:
| [ 16.612343][ C2] handle_softirqs (kernel/softirq.c:553) 
| [   16.612749][    C2] Tainted: [W]=WARN
[   16.612751][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.612753][    C2] Call Trace:
[   16.612755][    C2]  <IRQ>
[ 16.612757][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 16.612764][ C2] __might_resched (kernel/sched/core.c:8796) 
[ 16.612772][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 16.612776][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 16.612779][ C2] ? simple_recursive_removal (fs/libfs.c:614) 
[ 16.612783][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.612788][ 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) 
[ 16.612794][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 16.612797][ 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) 
[ 16.612800][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 16.612806][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 16.612809][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 16.612815][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 16.612818][ 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:2376) 
[ 16.612824][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.612828][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 16.612831][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 16.612834][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 16.612839][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.612842][ C2] ? copy_mc_enhanced_fast_string (arch/x86/lib/copy_mc_64.S:130) 
[ 16.612846][ C2] ? __wp_page_copy_user (mm/memory.c:3170) 
[ 16.612850][ C2] ? wp_page_copy (mm/memory.c:3486) 
[ 16.612854][ C2] ? handle_pte_fault (mm/memory.c:6013) 
[ 16.612857][ C2] ? __handle_mm_fault (mm/memory.c:6140) 
[ 16.612860][ C2] ? handle_mm_fault (mm/memory.c:6321) 
[ 16.612863][ C2] ? do_user_addr_fault (arch/x86/mm/fault.c:1337) 
[ 16.612866][ C2] ? exc_page_fault (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:151 arch/x86/mm/fault.c:1484 arch/x86/mm/fault.c:1532) 
[ 16.612869][ C2] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 16.612874][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.612878][ C2] __put_net (net/core/net_namespace.c:732) 
[ 16.612882][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 16.612886][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.612889][ C2] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.612893][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 16.612897][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.612900][ C2] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 16.612907][ C2] rcu_core (kernel/rcu/tree.c:2834) 
[ 16.612912][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 16.612917][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 16.612920][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 16.612922][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   16.612926][    C2]  </IRQ>
[   16.612927][    C2]  <TASK>
[ 16.612929][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.612931][ C2] RIP: 0010:copy_mc_enhanced_fast_string (arch/x86/lib/copy_mc_64.S:130) 
[ 16.612935][ C2] Code: 89 ca e9 7d fe ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 89 f8 48 89 d1 <f3> a4 31 c0 c3 cc cc cc cc 48 89 c8 c3 cc cc cc cc 66 0f 1f 84 00
All code
========
   0:	89 ca                	mov    %ecx,%edx
   2:	e9 7d fe ff ff       	jmp    0xfffffffffffffe84
   7:	66 66 2e 0f 1f 84 00 	data16 cs nopw 0x0(%rax,%rax,1)
   e:	00 00 00 00 
  12:	66 90                	xchg   %ax,%ax
  14:	90                   	nop
  15:	90                   	nop
  16:	90                   	nop
  17:	90                   	nop
  18:	90                   	nop
  19:	90                   	nop
  1a:	90                   	nop
  1b:	90                   	nop
  1c:	90                   	nop
  1d:	90                   	nop
  1e:	90                   	nop
  1f:	90                   	nop
  20:	90                   	nop
  21:	90                   	nop
  22:	90                   	nop
  23:	90                   	nop
  24:	48 89 f8             	mov    %rdi,%rax
  27:	48 89 d1             	mov    %rdx,%rcx
  2a:*	f3 a4                	rep movsb %ds:(%rsi),%es:(%rdi)		<-- trapping instruction
  2c:	31 c0                	xor    %eax,%eax
  2e:	c3                   	ret
  2f:	cc                   	int3
  30:	cc                   	int3
  31:	cc                   	int3
  32:	cc                   	int3
  33:	48 89 c8             	mov    %rcx,%rax
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	66                   	data16
  3c:	0f                   	.byte 0xf
  3d:	1f                   	(bad)
  3e:	84 00                	test   %al,(%rax)

Code starting with the faulting instruction
===========================================
   0:	f3 a4                	rep movsb %ds:(%rsi),%es:(%rdi)
   2:	31 c0                	xor    %eax,%eax
   4:	c3                   	ret
   5:	cc                   	int3
   6:	cc                   	int3
   7:	cc                   	int3
   8:	cc                   	int3
   9:	48 89 c8             	mov    %rcx,%rax
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	66                   	data16
  12:	0f                   	.byte 0xf
  13:	1f                   	(bad)
  14:	84 00                	test   %al,(%rax)
[   16.612938][    C2] RSP: 0000:ffffc90000a67ad8 EFLAGS: 00010246
[   16.612941][    C2] RAX: ffff88800ad8b000 RBX: ffffc90000a67d30 RCX: 0000000000000940
[   16.612943][    C2] RDX: 0000000000001000 RSI: ffff88802af2b6c0 RDI: ffff88800ad8b6c0
[   16.612945][    C2] RBP: ffff88800ad8b000 R08: 0000000000000000 R09: ffffed10055e57ff
[   16.612947][    C2] R10: ffff88802af2bfff R11: 0000000000000000 R12: ffff8880092c9540
[   16.612949][    C2] R13: 0000561f3fb39000 R14: ffffea0000000000 R15: ffff8880092c9540
[ 16.612956][ C2] __wp_page_copy_user (mm/memory.c:3170) 
[ 16.612958][ C2] ? __pfx_filemap_map_pages (mm/filemap.c:3692) 
[ 16.612964][ C2] wp_page_copy (mm/memory.c:3486) 
[ 16.612968][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.612971][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.612974][ C2] ? __pfx_wp_page_copy (mm/memory.c:3457) 
[ 16.612978][ C2] ? rcu_read_unlock (./include/linux/rcupdate.h:341 (discriminator 9) ./include/linux/rcupdate.h:871 (discriminator 9)) 
[ 16.612980][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.612983][ C2] ? trace_lock_release (./include/trace/events/lock.h:69 (discriminator 21)) 
[ 16.612989][ C2] ? lock_release (kernel/locking/lockdep.c:118 kernel/locking/lockdep.c:5884) 
[ 16.612992][ C2] ? do_wp_page (mm/memory.c:3939) 
[ 16.612997][ C2] handle_pte_fault (mm/memory.c:6013) 
[ 16.613001][ C2] ? __pfx_handle_pte_fault (mm/memory.c:5954) 
[ 16.613004][ C2] ? __pfx_anon_pipe_read (fs/pipe.c:271) 
[ 16.613008][ C2] ? reacquire_held_locks (kernel/locking/lockdep.c:5388) 
[ 16.613011][ C2] ? __pfx_autoremove_wake_function (kernel/sched/wait.c:383) 
[ 16.613016][ C2] __handle_mm_fault (mm/memory.c:6140) 
[ 16.613020][ C2] ? __pfx___handle_mm_fault (mm/memory.c:6049) 
[ 16.613023][ C2] ? rcu_read_unlock (./include/linux/rcupdate.h:341 (discriminator 9) ./include/linux/rcupdate.h:871 (discriminator 9)) 
[ 16.613029][ C2] ? __pfx_lock_vma_under_rcu (mm/memory.c:6547) 
[ 16.613034][ C2] handle_mm_fault (mm/memory.c:6321) 
[ 16.613037][ C2] ? __pfx_handle_mm_fault (mm/memory.c:6276) 
[ 16.613043][ C2] do_user_addr_fault (arch/x86/mm/fault.c:1337) 
[ 16.613047][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.613051][ C2] exc_page_fault (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:151 arch/x86/mm/fault.c:1484 arch/x86/mm/fault.c:1532) 
[ 16.613055][ C2] asm_exc_page_fault (./arch/x86/include/asm/idtentry.h:623) 
[   16.613057][    C2] RIP: 0033:0x7f385ed35535
[ 16.613061][ C2] Code: ff ff ff 49 8d 7c 24 10 48 8b 04 fa a8 0f 0f 85 91 01 00 00 48 89 c6 83 e9 01 48 c1 ee 0c 48 33 30 48 89 34 fa 66 42 89 0c 62 <48> c7 40 08 00 00 00 00 48 83 c4 10 5b 5d 41 5c c3 66 2e 0f 1f 84
All code
========
   0:	ff                   	(bad)
   1:	ff                   	(bad)
   2:	ff 49 8d             	decl   -0x73(%rcx)
   5:	7c 24                	jl     0x2b
   7:	10 48 8b             	adc    %cl,-0x75(%rax)
   a:	04 fa                	add    $0xfa,%al
   c:	a8 0f                	test   $0xf,%al
   e:	0f 85 91 01 00 00    	jne    0x1a5
  14:	48 89 c6             	mov    %rax,%rsi
  17:	83 e9 01             	sub    $0x1,%ecx
  1a:	48 c1 ee 0c          	shr    $0xc,%rsi
  1e:	48 33 30             	xor    (%rax),%rsi
  21:	48 89 34 fa          	mov    %rsi,(%rdx,%rdi,8)
  25:	66 42 89 0c 62       	mov    %cx,(%rdx,%r12,2)
  2a:*	48 c7 40 08 00 00 00 	movq   $0x0,0x8(%rax)		<-- trapping instruction
  31:	00 
  32:	48 83 c4 10          	add    $0x10,%rsp
  36:	5b                   	pop    %rbx
  37:	5d                   	pop    %rbp
  38:	41 5c                	pop    %r12
  3a:	c3                   	ret
  3b:	66                   	data16
  3c:	2e                   	cs
  3d:	0f                   	.byte 0xf
  3e:	1f                   	(bad)
  3f:	84                   	.byte 0x84

Code starting with the faulting instruction
===========================================
   0:	48 c7 40 08 00 00 00 	movq   $0x0,0x8(%rax)
   7:	00 
   8:	48 83 c4 10          	add    $0x10,%rsp
   c:	5b                   	pop    %rbx
   d:	5d                   	pop    %rbp
   e:	41 5c                	pop    %r12
  10:	c3                   	ret
  11:	66                   	data16
  12:	2e                   	cs
  13:	0f                   	.byte 0xf
  14:	1f                   	(bad)
  15:	84                   	.byte 0x84
[   16.613063][    C2] RSP: 002b:00007ffca75bfc30 EFLAGS: 00010246
[   16.613065][    C2] RAX: 0000561f3fb39220 RBX: ffffffffffffffb8 RCX: 0000000000000000
[   16.613067][    C2] RDX: 0000561f3fb24010 RSI: 0000000000000000 RDI: 0000000000000010
[   16.613068][    C2] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000561f3fb542b2
[   16.613070][    C2] R10: 000000002d6f489f R11: 0000000000000000 R12: 0000000000000000


Finger prints:
handle_softirqs:dump_stack_lvl:__might_resched:down_write:simple_recursive_removal
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