======================================
| [   14.836025][    C3] 1 lock held by swapper/3/0:
| [ 14.836221][ C3] #0: ffffffffa0d74480 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) 
| [   14.836555][    C3]
| [   14.836555][    C3] stack backtrace:
[   14.836799][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   14.836802][    C3] Call Trace:
[   14.836804][    C3]  <IRQ>
[ 14.836807][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 14.836813][ C3] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) 
[ 14.836818][ C3] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) 
[ 14.836823][ C3] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 14.836830][ C3] ? save_trace (kernel/locking/lockdep.c:594) 
[ 14.836834][ C3] mark_lock (kernel/locking/lockdep.c:4754) 
[ 14.836838][ C3] mark_usage (kernel/locking/lockdep.c:4643) 
[ 14.836842][ C3] __lock_acquire (kernel/locking/lockdep.c:5189) 
[ 14.836847][ C3] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 14.836851][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 14.836855][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 14.836861][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 14.836864][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 14.836869][ C3] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 14.836872][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 14.836875][ C3] simple_pin_fs (fs/libfs.c:1066) 
[ 14.836879][ C3] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 14.836882][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 14.836888][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 14.836891][ 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) 
[ 14.836897][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.836900][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 14.836903][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 14.836906][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 14.836911][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.836916][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 14.836919][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 14.836921][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 14.836923][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 14.836927][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 14.836930][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 14.836933][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 14.836939][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 14.836946][ C3] __put_net (net/core/net_namespace.c:732) 
[ 14.836950][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 14.836954][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.836957][ C3] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.836961][ C3] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 14.836965][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 14.836969][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 14.836973][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 14.836976][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 14.836980][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 14.836984][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 14.836988][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 14.836991][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 14.836993][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   14.836997][    C3]  </IRQ>
[   14.836998][    C3]  <TASK>
[ 14.837000][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.837002][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 14.837007][ 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
[   14.837010][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000246
[   14.837013][    C3] RAX: 0000000000044aed RBX: 1ffff9200002afc1 RCX: ffffffff9fd55a19
[   14.837016][    C3] RDX: 0000000000000000 RSI: ffffffffa0885f31 RDI: ffffffffa0050ce0
[   14.837017][    C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c3667a
[   14.837019][    C3] R10: ffff8880361b33d3 R11: 0000000000000000 R12: 0000000000000000
[   14.837021][    C3] R13: ffff888001bb4640 R14: dffffc0000000000 R15: 0000000000000000
[ 14.837025][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 14.837030][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 14.837032][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 14.837035][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 14.837038][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 14.837043][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 14.837047][ C3] do_idle (kernel/sched/idle.c:325) 
[ 14.837051][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 14.837055][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 14.837058][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 14.837063][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   14.853250][    C3] RCU nest depth: 0, expected: 0
| [   14.853424][    C3] INFO: lockdep is turned off.
| [   14.853598][    C3] Preemption disabled at:
| [ 14.853600][ C3] 0x0 
[   14.853923][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   14.853925][    C3] Call Trace:
[   14.853927][    C3]  <IRQ>
[ 14.853928][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 14.853936][ C3] __might_resched (kernel/sched/core.c:8819) 
[ 14.853942][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 14.853945][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 14.853948][ C3] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 14.853953][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 14.853959][ 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) 
[ 14.853964][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 14.853967][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 14.853971][ 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) 
[ 14.853975][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 14.853978][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 14.853983][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 14.853986][ 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) 
[ 14.853991][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.853995][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 14.853998][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 14.854001][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 14.854005][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.854008][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 14.854011][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 14.854014][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 14.854016][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 14.854020][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 14.854023][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 14.854026][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 14.854031][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 14.854037][ C3] __put_net (net/core/net_namespace.c:732) 
[ 14.854040][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 14.854044][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.854047][ C3] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.854050][ C3] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 14.854055][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 14.854059][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 14.854063][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 14.854067][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 14.854071][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 14.854074][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 14.854079][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 14.854082][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 14.854084][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   14.854088][    C3]  </IRQ>
[   14.854089][    C3]  <TASK>
[ 14.854090][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.854093][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 14.854097][ 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
[   14.854099][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000246
[   14.854102][    C3] RAX: 0000000000044aed RBX: 1ffff9200002afc1 RCX: ffffffff9fd55a19
[   14.854104][    C3] RDX: 0000000000000000 RSI: ffffffffa0885f31 RDI: ffffffffa0050ce0
[   14.854106][    C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c3667a
[   14.854107][    C3] R10: ffff8880361b33d3 R11: 0000000000000000 R12: 0000000000000000
[   14.854109][    C3] R13: ffff888001bb4640 R14: dffffc0000000000 R15: 0000000000000000
[ 14.854113][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 14.854118][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 14.854120][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 14.854123][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 14.854126][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 14.854130][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 14.854135][ C3] do_idle (kernel/sched/idle.c:325) 
[ 14.854139][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 14.854143][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 14.854146][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 14.854151][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   16.499560][    C0] INFO: lockdep is turned off.
| [   16.499760][    C0] Preemption disabled at:
| [ 16.499762][ C0] handle_softirqs (kernel/softirq.c:553) 
| [   16.500164][    C0] Tainted: [W]=WARN
[   16.500166][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.500168][    C0] Call Trace:
[   16.500170][    C0]  <IRQ>
[ 16.500172][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 16.500181][ C0] __might_resched (kernel/sched/core.c:8819) 
[ 16.500188][ C0] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 16.500192][ C0] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 16.500195][ C0] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 16.500202][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.500210][ 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) 
[ 16.500216][ C0] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 16.500218][ C0] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 16.500224][ 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) 
[ 16.500228][ C0] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 16.500231][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 16.500238][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 16.500241][ 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) 
[ 16.500248][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 16.500253][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 16.500256][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 16.500259][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 16.500266][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.500270][ C0] ? unwind_next_frame (arch/x86/kernel/unwind_orc.c:505) 
[ 16.500277][ C0] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 16.500281][ C0] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 16.500286][ C0] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 16.500293][ C0] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 16.500298][ 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) 
[ 16.500304][ C0] ? kmem_cache_free (./include/linux/kmemleak.h:49 mm/slub.c:2305 mm/slub.c:4642 mm/slub.c:4744) 
[ 16.500310][ C0] ? task_work_run (kernel/task_work.c:227 (discriminator 1)) 
[ 16.500317][ C0] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 16.500322][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.500327][ C0] __put_net (net/core/net_namespace.c:732) 
[ 16.500331][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 16.500335][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 16.500338][ C0] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 16.500343][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 16.500347][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.500350][ C0] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 16.500356][ C0] rcu_core (kernel/rcu/tree.c:2826) 
[ 16.500360][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 16.500364][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 16.500366][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 16.500369][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   16.500372][    C0]  </IRQ>
[   16.500373][    C0]  <TASK>
[ 16.500374][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.500377][ C0] RIP: 0010:unwind_next_frame (arch/x86/kernel/unwind_orc.c:505) 
[ 16.500381][ C0] Code: 4c 8b 4c 24 20 48 85 c0 49 89 c6 0f 84 a8 02 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8d 7e 05 4c 89 fa 48 c1 ea 03 0f b6 04 02 <4c> 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 a8 06 00 00 41 0f b6 46
All code
========
   0:	4c 8b 4c 24 20       	mov    0x20(%rsp),%r9
   5:	48 85 c0             	test   %rax,%rax
   8:	49 89 c6             	mov    %rax,%r14
   b:	0f 84 a8 02 00 00    	je     0x2b9
  11:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  18:	fc ff df 
  1b:	4d 8d 7e 05          	lea    0x5(%r14),%r15
  1f:	4c 89 fa             	mov    %r15,%rdx
  22:	48 c1 ea 03          	shr    $0x3,%rdx
  26:	0f b6 04 02          	movzbl (%rdx,%rax,1),%eax
  2a:*	4c 89 fa             	mov    %r15,%rdx		<-- trapping instruction
  2d:	83 e2 07             	and    $0x7,%edx
  30:	38 d0                	cmp    %dl,%al
  32:	7f 08                	jg     0x3c
  34:	84 c0                	test   %al,%al
  36:	0f 85 a8 06 00 00    	jne    0x6e4
  3c:	41                   	rex.B
  3d:	0f                   	.byte 0xf
  3e:	b6 46                	mov    $0x46,%dh

Code starting with the faulting instruction
===========================================
   0:	4c 89 fa             	mov    %r15,%rdx
   3:	83 e2 07             	and    $0x7,%edx
   6:	38 d0                	cmp    %dl,%al
   8:	7f 08                	jg     0x12
   a:	84 c0                	test   %al,%al
   c:	0f 85 a8 06 00 00    	jne    0x6ba
  12:	41                   	rex.B
  13:	0f                   	.byte 0xf
  14:	b6 46                	mov    $0x46,%dh
[   16.500384][    C0] RSP: 0018:ffffc90000ac78e8 EFLAGS: 00000a07
[   16.500388][    C0] RAX: 0000000000000000 RBX: 1ffff92000158f26 RCX: dffffc0000000000
[   16.500390][    C0] RDX: 1ffffffff4375939 RSI: 0000000000000000 RDI: ffffffffa186fdac
[   16.500392][    C0] RBP: 0000000000000001 R08: 0000000000000000 R09: ffffc90000ac7a29
[   16.500394][    C0] R10: ffffffff9d40b397 R11: ffffc90000ac7a28 R12: ffffc90000ac7a40
[   16.500396][    C0] R13: ffffc90000ac79e8 R14: ffffffffa1bac9c8 R15: ffffffffa1bac9cd
[ 16.500399][ C0] ? 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) 
[ 16.500404][ C0] ? unwind_next_frame (arch/x86/kernel/unwind_orc.c:495) 
[ 16.500408][ C0] ? task_work_run (kernel/task_work.c:227 (discriminator 1)) 
[ 16.500412][ C0] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 16.500417][ C0] ? task_work_run (kernel/task_work.c:227 (discriminator 1)) 
[ 16.500420][ C0] ? kernel_text_address (kernel/extable.c:99) 
[ 16.500423][ C0] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 16.500427][ C0] arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 16.500432][ C0] ? task_work_run (kernel/task_work.c:227 (discriminator 1)) 
[ 16.500436][ C0] stack_trace_save (kernel/stacktrace.c:123) 
[ 16.500439][ C0] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 16.500442][ C0] ? kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 16.500445][ C0] ? fuse_release (fs/fuse/file.c:383) 
[ 16.500451][ C0] ? __fput (fs/file_table.c:465) 
[ 16.500457][ C0] ? task_work_run (kernel/task_work.c:227 (discriminator 1)) 
[ 16.500459][ C0] ? do_exit (kernel/exit.c:954) 
[ 16.500465][ C0] ? do_group_exit (kernel/exit.c:1083) 
[ 16.500468][ C0] ? __x64_sys_exit_group (kernel/exit.c:1111) 
[ 16.500471][ C0] ? x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 16.500478][ C0] ? do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 16.500484][ C0] kasan_save_stack (mm/kasan/common.c:48) 
[ 16.500487][ C0] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 16.500489][ C0] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 16.500492][ 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) 
[ 16.500495][ C0] ? kmem_cache_free (./include/linux/kmemleak.h:49 mm/slub.c:2305 mm/slub.c:4642 mm/slub.c:4744) 
[ 16.500498][ C0] ? task_work_run (kernel/task_work.c:227 (discriminator 1)) 
[ 16.500502][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.500506][ 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) 
[ 16.500509][ C0] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 16.500512][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.500516][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.500519][ C0] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 16.500522][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 16.500527][ C0] ? debug_object_active_state (lib/debugobjects.c:1056) 
[ 16.500536][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.500539][ 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) 
[ 16.500543][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.500546][ C0] ? trace_lock_release (./include/trace/events/lock.h:69 (discriminator 21)) 
[ 16.500551][ C0] ? lock_release (kernel/locking/lockdep.c:118 kernel/locking/lockdep.c:5879) 
[ 16.500555][ 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) 
[ 16.500557][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.500561][ C0] kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 16.500564][ C0] ? __pfx_free_object_rcu (mm/kmemleak.c:524) 
[ 16.500568][ 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) 
[ 16.500573][ C0] kmem_cache_free (./include/linux/kmemleak.h:49 mm/slub.c:2305 mm/slub.c:4642 mm/slub.c:4744) 
[ 16.500577][ C0] ? task_work_run (kernel/task_work.c:227 (discriminator 1)) 
[ 16.500581][ C0] task_work_run (kernel/task_work.c:227 (discriminator 1)) 
[ 16.500585][ C0] ? __pfx_task_work_run (kernel/task_work.c:195) 
[ 16.500588][ 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) 
[ 16.500593][ C0] do_exit (kernel/exit.c:954) 
[ 16.500596][ C0] do_group_exit (kernel/exit.c:1083) 
[ 16.500600][ C0] __x64_sys_exit_group (kernel/exit.c:1111) 
[ 16.500603][ C0] x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 16.500606][ C0] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 16.500610][ C0] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   16.500612][    C0] RIP: 0033:0x7fbde8345abd
[ 16.500616][ C0] Code: Unable to access opcode bytes at 0x7fbde8345a93.

Code starting with the faulting instruction
===========================================
[   16.500617][    C0] RSP: 002b:00007ffdf80ebff8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   16.500620][    C0] RAX: ffffffffffffffda RBX: 00007fbde84229c0 RCX: 00007fbde8345abd
[   16.500622][    C0] RDX: 00000000000000e7 RSI: ffffffffffffff80 RDI: 0000000000000000
[   16.500624][    C0] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000038
[   16.500625][    C0] R10: 00007ffdf80ebe60 R11: 0000000000000246 R12: 00007fbde84229c0


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