======================================
| [   15.142441][    C3] 1 lock held by swapper/3/0:
| [ 15.142637][ C3] #0: ffffffff91174480 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) 
| [   15.142956][    C3]
| [   15.142956][    C3] stack backtrace:
[   15.143180][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.143183][    C3] Call Trace:
[   15.143184][    C3]  <IRQ>
[ 15.143187][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.143193][ C3] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) 
[ 15.143198][ C3] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) 
[ 15.143203][ C3] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 15.143208][ C3] ? save_trace (kernel/locking/lockdep.c:594) 
[ 15.143212][ C3] mark_lock (kernel/locking/lockdep.c:4754) 
[ 15.143217][ C3] mark_usage (kernel/locking/lockdep.c:4643) 
[ 15.143220][ C3] __lock_acquire (kernel/locking/lockdep.c:5189) 
[ 15.143226][ C3] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 15.143229][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 15.143234][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 15.143239][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 15.143242][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 15.143247][ C3] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 15.143250][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 15.143253][ C3] simple_pin_fs (fs/libfs.c:1066) 
[ 15.143257][ C3] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 15.143260][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 15.143265][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 15.143268][ 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:2333) 
[ 15.143274][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.143277][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 15.143279][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.143282][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 15.143286][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.143289][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.143292][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.143294][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.143297][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.143301][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 15.143304][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.143307][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.143312][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 15.143318][ C3] __put_net (net/core/net_namespace.c:732) 
[ 15.143322][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 15.143326][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.143329][ C3] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.143332][ C3] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 15.143336][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 15.143340][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 15.143343][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 15.143347][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.143351][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 15.143354][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 15.143359][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.143361][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.143363][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   15.143366][    C3]  </IRQ>
[   15.143367][    C3]  <TASK>
[ 15.143369][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.143372][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.143376][ C3] Code: b0 b8 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 a3 d0 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:	b0 b8                	mov    $0xb8,%al
   2:	00 c3                	add    %al,%bl
   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 a3 d0 13 00 	verw   0x13d0a3(%rip)        # 0x13d0cb
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	c3                   	ret		<-- trapping instruction
  2b:	cc                   	int3
  2c:	cc                   	int3
  2d:	cc                   	int3
  2e:	cc                   	int3
  2f:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  36:	00 00 00 
  39:	66 90                	xchg   %ax,%ax
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	90                   	nop
  3f:	90                   	nop

Code starting with the faulting instruction
===========================================
   0:	c3                   	ret
   1:	cc                   	int3
   2:	cc                   	int3
   3:	cc                   	int3
   4:	cc                   	int3
   5:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   c:	00 00 00 
   f:	66 90                	xchg   %ax,%ax
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
[   15.143379][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000246
[   15.143382][    C3] RAX: 0000000000048827 RBX: 1ffff9200002afc1 RCX: ffffffff90155a19
[   15.143384][    C3] RDX: 0000000000000000 RSI: ffffffff90c85f31 RDI: ffffffff90450ce0
[   15.143386][    C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c3667a
[   15.143388][    C3] R10: ffff8880361b33d3 R11: 0000000000000000 R12: 0000000000000000
[   15.143390][    C3] R13: ffff888001bb4640 R14: dffffc0000000000 R15: 0000000000000000
[ 15.143393][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 15.143399][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.143401][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.143403][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.143407][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 15.143411][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 15.143416][ C3] do_idle (kernel/sched/idle.c:325) 
[ 15.143420][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.143423][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.143427][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 15.143431][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   15.158366][    C3] RCU nest depth: 0, expected: 0
| [   15.158545][    C3] INFO: lockdep is turned off.
| [   15.158717][    C3] Preemption disabled at:
| [ 15.158718][ C3] 0x0 
[   15.159022][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.159024][    C3] Call Trace:
[   15.159025][    C3]  <IRQ>
[ 15.159027][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.159034][ C3] __might_resched (kernel/sched/core.c:8819) 
[ 15.159040][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 15.159044][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 15.159046][ C3] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 15.159050][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 15.159056][ 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) 
[ 15.159061][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 15.159063][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 15.159067][ 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) 
[ 15.159072][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 15.159074][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 15.159079][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 15.159082][ 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:2333) 
[ 15.159087][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.159091][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 15.159094][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.159097][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 15.159101][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.159105][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.159108][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.159111][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.159113][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.159117][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 15.159120][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.159123][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.159127][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 15.159133][ C3] __put_net (net/core/net_namespace.c:732) 
[ 15.159137][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 15.159140][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.159143][ C3] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.159147][ C3] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 15.159151][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 15.159155][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 15.159159][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 15.159162][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.159167][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 15.159170][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 15.159175][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.159177][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.159179][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   15.159183][    C3]  </IRQ>
[   15.159184][    C3]  <TASK>
[ 15.159185][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.159188][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.159192][ C3] Code: b0 b8 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 a3 d0 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:	b0 b8                	mov    $0xb8,%al
   2:	00 c3                	add    %al,%bl
   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 a3 d0 13 00 	verw   0x13d0a3(%rip)        # 0x13d0cb
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	c3                   	ret		<-- trapping instruction
  2b:	cc                   	int3
  2c:	cc                   	int3
  2d:	cc                   	int3
  2e:	cc                   	int3
  2f:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  36:	00 00 00 
  39:	66 90                	xchg   %ax,%ax
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	90                   	nop
  3f:	90                   	nop

Code starting with the faulting instruction
===========================================
   0:	c3                   	ret
   1:	cc                   	int3
   2:	cc                   	int3
   3:	cc                   	int3
   4:	cc                   	int3
   5:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   c:	00 00 00 
   f:	66 90                	xchg   %ax,%ax
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
[   15.159194][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000246
[   15.159198][    C3] RAX: 0000000000048827 RBX: 1ffff9200002afc1 RCX: ffffffff90155a19
[   15.159200][    C3] RDX: 0000000000000000 RSI: ffffffff90c85f31 RDI: ffffffff90450ce0
[   15.159202][    C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c3667a
[   15.159203][    C3] R10: ffff8880361b33d3 R11: 0000000000000000 R12: 0000000000000000
[   15.159205][    C3] R13: ffff888001bb4640 R14: dffffc0000000000 R15: 0000000000000000
[ 15.159209][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 15.159214][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.159216][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.159219][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.159222][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 15.159226][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 15.159231][ C3] do_idle (kernel/sched/idle.c:325) 
[ 15.159235][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.159239][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.159242][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 15.159247][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   17.011525][    C0] INFO: lockdep is turned off.
| [   17.011730][    C0] Preemption disabled at:
| [ 17.011731][ C0] handle_softirqs (kernel/softirq.c:553) 
| [   17.012152][    C0] Tainted: [W]=WARN
[   17.012153][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   17.012155][    C0] Call Trace:
[   17.012157][    C0]  <IRQ>
[ 17.012159][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 17.012166][ C0] __might_resched (kernel/sched/core.c:8819) 
[ 17.012172][ C0] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 17.012176][ C0] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 17.012178][ C0] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 17.012182][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.012188][ 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) 
[ 17.012193][ C0] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 17.012196][ C0] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 17.012200][ 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) 
[ 17.012204][ C0] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 17.012207][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 17.012212][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 17.012215][ 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:2333) 
[ 17.012220][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 17.012224][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 17.012227][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 17.012230][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 17.012234][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.012238][ C0] ? __rcu_read_unlock (kernel/rcu/tree_plugin.h:396 kernel/rcu/tree_plugin.h:435) 
[ 17.012241][ C0] ? __is_insn_slot_addr (kernel/kprobes.c:310) 
[ 17.012245][ C0] ? kernel_text_address (kernel/extable.c:123 kernel/extable.c:94) 
[ 17.012250][ C0] ? __kernel_text_address (kernel/extable.c:79) 
[ 17.012252][ C0] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 17.012258][ C0] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 17.012262][ C0] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 17.012265][ C0] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 17.012270][ C0] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 17.012274][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.012279][ C0] __put_net (net/core/net_namespace.c:732) 
[ 17.012282][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 17.012286][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 17.012289][ C0] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 17.012292][ C0] ? clockevents_program_event (kernel/time/clockevents.c:326) 
[ 17.012295][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.012299][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 17.012303][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.012307][ C0] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 17.012312][ C0] rcu_core (kernel/rcu/tree.c:2826) 
[ 17.012315][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 17.012319][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 17.012322][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 17.012324][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   17.012327][    C0]  </IRQ>
[   17.012328][    C0]  <TASK>
[ 17.012330][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.012332][ C0] RIP: 0010:__rcu_read_unlock (kernel/rcu/tree_plugin.h:396 kernel/rcu/tree_plugin.h:435) 
[ 17.012336][ C0] Code: 00 00 41 54 55 65 48 8b 2d 24 8a 08 05 53 48 8d bd 04 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 <48> 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 ec 00 00 00 65
All code
========
   0:	00 00                	add    %al,(%rax)
   2:	41 54                	push   %r12
   4:	55                   	push   %rbp
   5:	65 48 8b 2d 24 8a 08 	mov    %gs:0x5088a24(%rip),%rbp        # 0x5088a31
   c:	05 
   d:	53                   	push   %rbx
   e:	48 8d bd 04 04 00 00 	lea    0x404(%rbp),%rdi
  15:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  1c:	fc ff df 
  1f:	48 89 fa             	mov    %rdi,%rdx
  22:	48 c1 ea 03          	shr    $0x3,%rdx
  26:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
  2a:*	48 89 f8             	mov    %rdi,%rax		<-- trapping instruction
  2d:	83 e0 07             	and    $0x7,%eax
  30:	83 c0 03             	add    $0x3,%eax
  33:	38 d0                	cmp    %dl,%al
  35:	7c 08                	jl     0x3f
  37:	84 d2                	test   %dl,%dl
  39:	0f 85 ec 00 00 00    	jne    0x12b
  3f:	65                   	gs

Code starting with the faulting instruction
===========================================
   0:	48 89 f8             	mov    %rdi,%rax
   3:	83 e0 07             	and    $0x7,%eax
   6:	83 c0 03             	add    $0x3,%eax
   9:	38 d0                	cmp    %dl,%al
   b:	7c 08                	jl     0x15
   d:	84 d2                	test   %dl,%dl
   f:	0f 85 ec 00 00 00    	jne    0x101
  15:	65                   	gs
[   17.012339][    C0] RSP: 0018:ffffc90000a77808 EFLAGS: 00000a07
[   17.012343][    C0] RAX: dffffc0000000000 RBX: ffffffff9120c908 RCX: 0000000000000002
[   17.012345][    C0] RDX: 0000000000000000 RSI: ffffffff90450c60 RDI: ffff888008cb8444
[   17.012347][    C0] RBP: ffff888008cb8040 R08: 0000000000000000 R09: 0000000000000000
[   17.012348][    C0] R10: ffffffff8dba30f9 R11: ffffc90000a778d8 R12: 0000000000000000
[   17.012350][    C0] R13: ffffffff9120c908 R14: ffff888008cb8040 R15: ffff8880019b6ac0
[ 17.012353][ C0] ? __is_insn_slot_addr (./include/linux/rcupdate.h:331 ./include/linux/rcupdate.h:841 kernel/kprobes.c:299) 
[ 17.012358][ C0] ? lock_release (kernel/locking/lockdep.c:118 kernel/locking/lockdep.c:5879) 
[ 17.012363][ C0] __is_insn_slot_addr (kernel/kprobes.c:310) 
[ 17.012366][ C0] kernel_text_address (kernel/extable.c:123 kernel/extable.c:94) 
[ 17.012370][ C0] __kernel_text_address (kernel/extable.c:79) 
[ 17.012373][ C0] unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 17.012376][ C0] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 17.012380][ C0] arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 17.012386][ C0] stack_trace_save (kernel/stacktrace.c:123) 
[ 17.012389][ C0] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 17.012393][ C0] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 17.012396][ C0] ? stack_depot_save_flags (lib/stackdepot.c:552 lib/stackdepot.c:619) 
[ 17.012399][ C0] kasan_save_stack (mm/kasan/common.c:48) 
[ 17.012402][ C0] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 17.012405][ C0] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 17.012409][ C0] ? __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:3084) 
[ 17.012412][ C0] ? kmem_cache_free (./include/linux/kmemleak.h:49 mm/slub.c:2305 mm/slub.c:4642 mm/slub.c:4744) 
[ 17.012417][ C0] ? exit_mmap (mm/mmap.c:1311) 
[ 17.012420][ C0] ? mmput (kernel/fork.c:1446 kernel/fork.c:1381 kernel/fork.c:1401) 
[ 17.012425][ C0] ? exit_mm (kernel/exit.c:590) 
[ 17.012428][ C0] ? do_exit (kernel/exit.c:943) 
[ 17.012430][ C0] ? do_group_exit (kernel/exit.c:1083) 
[ 17.012433][ C0] ? __x64_sys_exit_group (kernel/exit.c:1111) 
[ 17.012435][ C0] ? x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 17.012440][ C0] ? do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 17.012444][ C0] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 17.012447][ C0] ? 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) 
[ 17.012450][ C0] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 17.012453][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.012457][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.012461][ C0] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 17.012464][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 17.012468][ C0] ? debug_object_active_state (lib/debugobjects.c:1056) 
[ 17.012475][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.012479][ C0] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2127 arch/x86/mm/physaddr.c:65) 
[ 17.012481][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.012485][ C0] ? trace_lock_release (./include/trace/events/lock.h:69 (discriminator 21)) 
[ 17.012488][ C0] ? lock_release (kernel/locking/lockdep.c:118 kernel/locking/lockdep.c:5879) 
[ 17.012491][ C0] ? __virt_addr_valid (./arch/x86/include/asm/preempt.h:104 ./include/linux/rcupdate.h:955 ./include/linux/mmzone.h:2127 arch/x86/mm/physaddr.c:65) 
[ 17.012493][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.012498][ C0] kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 17.012503][ C0] ? __pfx_free_object_rcu (mm/kmemleak.c:524) 
[ 17.012507][ C0] __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:3084) 
[ 17.012512][ C0] kmem_cache_free (./include/linux/kmemleak.h:49 mm/slub.c:2305 mm/slub.c:4642 mm/slub.c:4744) 
[ 17.012515][ C0] ? exit_mmap (mm/mmap.c:1311) 
[ 17.012518][ C0] exit_mmap (mm/mmap.c:1311) 
[ 17.012522][ C0] ? __pfx_exit_mmap (mm/mmap.c:1259) 
[ 17.012524][ C0] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:727 kernel/locking/mutex.c:746) 
[ 17.012528][ C0] ? lock_release (kernel/locking/lockdep.c:118 kernel/locking/lockdep.c:5879) 
[ 17.012532][ C0] ? __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) 
[ 17.012542][ C0] mmput (kernel/fork.c:1446 kernel/fork.c:1381 kernel/fork.c:1401) 
[ 17.012546][ C0] exit_mm (kernel/exit.c:590) 
[ 17.012549][ C0] do_exit (kernel/exit.c:943) 
[ 17.012553][ C0] do_group_exit (kernel/exit.c:1083) 
[ 17.012557][ C0] __x64_sys_exit_group (kernel/exit.c:1111) 
[ 17.012560][ C0] x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 17.012563][ C0] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 17.012567][ C0] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   17.012569][    C0] RIP: 0033:0x7f5cf98c3abd
[ 17.012573][ C0] Code: Unable to access opcode bytes at 0x7f5cf98c3a93.

Code starting with the faulting instruction
===========================================
[   17.012575][    C0] RSP: 002b:00007ffdaba2b268 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   17.012577][    C0] RAX: ffffffffffffffda RBX: 00007f5cf99a09c0 RCX: 00007f5cf98c3abd
[   17.012579][    C0] RDX: 00000000000000e7 RSI: ffffffffffffff80 RDI: 0000000000000000
[   17.012581][    C0] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000020
[   17.012582][    C0] R10: 00007ffdaba2b110 R11: 0000000000000246 R12: 00007f5cf99a09c0


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
handle_softirqs:dump_stack_lvl:__might_resched:down_write:simple_recursive_removal