======================================
| [   16.649682][    C2] 1 lock held by swapper/2/0:
| [ 16.649860][ C2] #0: ffffffff9f974480 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) 
| [   16.650177][    C2]
| [   16.650177][    C2] stack backtrace:
[   16.650404][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.650406][    C2] Call Trace:
[   16.650408][    C2]  <IRQ>
[ 16.650410][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 16.650416][ C2] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) 
[ 16.650421][ C2] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) 
[ 16.650426][ C2] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 16.650431][ C2] ? save_trace (kernel/locking/lockdep.c:594) 
[ 16.650436][ C2] mark_lock (kernel/locking/lockdep.c:4754) 
[ 16.650440][ C2] mark_usage (kernel/locking/lockdep.c:4643) 
[ 16.650443][ C2] __lock_acquire (kernel/locking/lockdep.c:5189) 
[ 16.650449][ C2] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 16.650452][ C2] ? simple_pin_fs (fs/libfs.c:1066) 
[ 16.650457][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.650462][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 16.650465][ C2] ? simple_pin_fs (fs/libfs.c:1066) 
[ 16.650469][ C2] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 16.650472][ C2] ? simple_pin_fs (fs/libfs.c:1066) 
[ 16.650476][ C2] simple_pin_fs (fs/libfs.c:1066) 
[ 16.650480][ C2] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 16.650483][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 16.650487][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 16.650490][ 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:2333) 
[ 16.650496][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 16.650499][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 16.650502][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 16.650504][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 16.650508][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.650512][ C2] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 16.650515][ C2] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 16.650517][ C2] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 16.650519][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 16.650522][ C2] ? do_idle (kernel/sched/idle.c:325) 
[ 16.650525][ C2] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 16.650528][ C2] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 16.650533][ C2] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 16.650539][ C2] __put_net (net/core/net_namespace.c:732) 
[ 16.650542][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 16.650546][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 16.650549][ C2] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 16.650554][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 16.650558][ C2] ? __lock_release (kernel/locking/lockdep.c:5534) 
[ 16.650562][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.650565][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 16.650569][ C2] rcu_core (kernel/rcu/tree.c:2826) 
[ 16.650573][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 16.650577][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 16.650579][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 16.650582][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   16.650585][    C2]  </IRQ>
[   16.650586][    C2]  <TASK>
[ 16.650588][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.650590][ C2] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 16.650594][ C2] 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
[   16.650597][    C2] RSP: 0018:ffffc90000147de8 EFLAGS: 00000242
[   16.650600][    C2] RAX: 000000000004811f RBX: 1ffff92000028fc1 RCX: ffffffff9e955a19
[   16.650603][    C2] RDX: 0000000000000000 RSI: ffffffff9f485f31 RDI: ffffffff9ec50ce0
[   16.650605][    C2] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1005ea667a
[   16.650606][    C2] R10: ffff88802f5333d3 R11: 0000000000000000 R12: 0000000000000000
[   16.650608][    C2] R13: ffff888001bb2340 R14: dffffc0000000000 R15: 0000000000000000
[ 16.650612][ C2] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 16.650617][ C2] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 16.650619][ C2] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 16.650622][ C2] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 16.650626][ C2] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 16.650630][ C2] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 16.650635][ C2] do_idle (kernel/sched/idle.c:325) 
[ 16.650638][ C2] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 16.650642][ C2] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 16.650645][ C2] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 16.650650][ C2] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   16.666024][    C2] RCU nest depth: 0, expected: 0
| [   16.666213][    C2] INFO: lockdep is turned off.
| [   16.666403][    C2] Preemption disabled at:
| [ 16.666404][ C2] 0x0 
[   16.666835][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.666836][    C2] Call Trace:
[   16.666838][    C2]  <IRQ>
[ 16.666840][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 16.666847][ C2] __might_resched (kernel/sched/core.c:8819) 
[ 16.666852][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 16.666856][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 16.666859][ C2] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 16.666864][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.666870][ 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) 
[ 16.666874][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 16.666877][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 16.666881][ 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) 
[ 16.666885][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 16.666888][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 16.666893][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 16.666896][ 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:2333) 
[ 16.666901][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 16.666904][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 16.666908][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 16.666911][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 16.666916][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.666919][ C2] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 16.666922][ C2] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 16.666925][ C2] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 16.666927][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 16.666932][ C2] ? do_idle (kernel/sched/idle.c:325) 
[ 16.666935][ C2] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 16.666938][ C2] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 16.666942][ C2] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 16.666949][ C2] __put_net (net/core/net_namespace.c:732) 
[ 16.666952][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 16.666956][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 16.666959][ C2] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 16.666964][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 16.666968][ C2] ? __lock_release (kernel/locking/lockdep.c:5534) 
[ 16.666973][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.666976][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 16.666981][ C2] rcu_core (kernel/rcu/tree.c:2826) 
[ 16.666984][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 16.666989][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 16.666992][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 16.666994][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   16.666997][    C2]  </IRQ>
[   16.666998][    C2]  <TASK>
[ 16.667000][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.667003][ C2] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 16.667007][ C2] 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
[   16.667009][    C2] RSP: 0018:ffffc90000147de8 EFLAGS: 00000242
[   16.667013][    C2] RAX: 000000000004811f RBX: 1ffff92000028fc1 RCX: ffffffff9e955a19
[   16.667015][    C2] RDX: 0000000000000000 RSI: ffffffff9f485f31 RDI: ffffffff9ec50ce0
[   16.667016][    C2] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1005ea667a
[   16.667018][    C2] R10: ffff88802f5333d3 R11: 0000000000000000 R12: 0000000000000000
[   16.667019][    C2] R13: ffff888001bb2340 R14: dffffc0000000000 R15: 0000000000000000
[ 16.667023][ C2] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 16.667029][ C2] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 16.667031][ C2] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 16.667033][ C2] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 16.667037][ C2] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 16.667041][ C2] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 16.667046][ C2] do_idle (kernel/sched/idle.c:325) 
[ 16.667050][ C2] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 16.667053][ C2] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 16.667056][ C2] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 16.667061][ C2] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   19.232808][    C2] INFO: lockdep is turned off.
| [   19.233019][    C2] Preemption disabled at:
| [ 19.233021][ C2] handle_softirqs (kernel/softirq.c:553) 
| [   19.233581][    C2] Tainted: [W]=WARN
[   19.233583][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   19.233585][    C2] Call Trace:
[   19.233586][    C2]  <IRQ>
[ 19.233588][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 19.233595][ C2] __might_resched (kernel/sched/core.c:8819) 
[ 19.233601][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 19.233605][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 19.233607][ C2] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 19.233612][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 19.233618][ 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) 
[ 19.233623][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 19.233625][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 19.233630][ 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) 
[ 19.233634][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 19.233637][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 19.233642][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 19.233645][ 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:2333) 
[ 19.233651][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 19.233655][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 19.233658][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 19.233660][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 19.233665][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 19.233668][ C2] ? trace_lock_release (./include/trace/events/lock.h:69) 
[ 19.233672][ C2] ? lock_release (kernel/locking/lockdep.c:118 kernel/locking/lockdep.c:5879) 
[ 19.233675][ C2] ? unwind_next_frame (./include/linux/rcupdate.h:873 ./include/linux/rcupdate.h:1155 arch/x86/kernel/unwind_orc.c:479) 
[ 19.233680][ C2] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 19.233684][ C2] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 19.233688][ C2] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 19.233693][ C2] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 19.233696][ C2] ? __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) 
[ 19.233700][ C2] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 19.233705][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 19.233709][ C2] __put_net (net/core/net_namespace.c:732) 
[ 19.233713][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 19.233717][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 19.233720][ C2] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 19.233725][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 19.233729][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 19.233732][ C2] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 19.233738][ C2] rcu_core (kernel/rcu/tree.c:2826) 
[ 19.233741][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 19.233745][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 19.233748][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 19.233750][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   19.233754][    C2]  </IRQ>
[   19.233755][    C2]  <TASK>
[ 19.233756][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 19.233759][ C2] RIP: 0010:trace_lock_release (./include/trace/events/lock.h:69) 
[ 19.233762][ C2] Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 53 66 90 65 8b 05 da 3f 13 05 83 f8 3f 0f 87 a3 00 00 00 89 c0 48 0f a3 05 23 51 20 04 <72> 06 5b c3 cc cc cc cc e8 26 f1 08 00 84 c0 75 f1 0f b6 1d c6 93
All code
========
   0:	90                   	nop
   1:	90                   	nop
   2:	90                   	nop
   3:	90                   	nop
   4:	90                   	nop
   5:	90                   	nop
   6:	90                   	nop
   7:	90                   	nop
   8:	90                   	nop
   9:	90                   	nop
   a:	90                   	nop
   b:	90                   	nop
   c:	90                   	nop
   d:	53                   	push   %rbx
   e:	66 90                	xchg   %ax,%ax
  10:	65 8b 05 da 3f 13 05 	mov    %gs:0x5133fda(%rip),%eax        # 0x5133ff1
  17:	83 f8 3f             	cmp    $0x3f,%eax
  1a:	0f 87 a3 00 00 00    	ja     0xc3
  20:	89 c0                	mov    %eax,%eax
  22:	48 0f a3 05 23 51 20 	bt     %rax,0x4205123(%rip)        # 0x420514d
  29:	04 
  2a:*	72 06                	jb     0x32		<-- trapping instruction
  2c:	5b                   	pop    %rbx
  2d:	c3                   	ret
  2e:	cc                   	int3
  2f:	cc                   	int3
  30:	cc                   	int3
  31:	cc                   	int3
  32:	e8 26 f1 08 00       	call   0x8f15d
  37:	84 c0                	test   %al,%al
  39:	75 f1                	jne    0x2c
  3b:	0f                   	.byte 0xf
  3c:	b6 1d                	mov    $0x1d,%dh
  3e:	c6                   	(bad)
  3f:	93                   	xchg   %eax,%ebx

Code starting with the faulting instruction
===========================================
   0:	72 06                	jb     0x8
   2:	5b                   	pop    %rbx
   3:	c3                   	ret
   4:	cc                   	int3
   5:	cc                   	int3
   6:	cc                   	int3
   7:	cc                   	int3
   8:	e8 26 f1 08 00       	call   0x8f133
   d:	84 c0                	test   %al,%al
   f:	75 f1                	jne    0x2
  11:	0f                   	.byte 0xf
  12:	b6 1d                	mov    $0x1d,%dh
  14:	c6                   	(bad)
  15:	93                   	xchg   %eax,%ebx
[   19.233765][    C2] RSP: 0018:ffffc90000a67768 EFLAGS: 00000297
[   19.233769][    C2] RAX: 0000000000000002 RBX: 1ffff9200014cefc RCX: ffffc90000a68001
[   19.233771][    C2] RDX: ffffc90000a68000 RSI: ffffffff9c00b73e RDI: ffffffff9f9745a0
[   19.233773][    C2] RBP: ffffffff9f9745a0 R08: 0000000000000000 R09: ffffc90000a678d9
[   19.233774][    C2] R10: ffffffff9c00b397 R11: ffffc90000a678d8 R12: ffffffff9c00b73e
[   19.233776][    C2] R13: ffffc90000a67898 R14: ffffc90000a60000 R15: ffffc90000a67f20
[ 19.233778][ C2] ? unwind_next_frame (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 ./include/linux/rcupdate.h:1155 arch/x86/kernel/unwind_orc.c:479) 
[ 19.233782][ C2] ? 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) 
[ 19.233786][ C2] ? unwind_next_frame (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 ./include/linux/rcupdate.h:1155 arch/x86/kernel/unwind_orc.c:479) 
[ 19.233791][ C2] lock_release (kernel/locking/lockdep.c:118 kernel/locking/lockdep.c:5879) 
[ 19.233795][ C2] unwind_next_frame (./include/linux/rcupdate.h:873 ./include/linux/rcupdate.h:1155 arch/x86/kernel/unwind_orc.c:479) 
[ 19.233798][ C2] ? __x64_sys_exit_group (kernel/exit.c:1111) 
[ 19.233803][ C2] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 19.233808][ C2] ? __x64_sys_exit_group (kernel/exit.c:1111) 
[ 19.233811][ C2] ? kernel_text_address (kernel/extable.c:99) 
[ 19.233816][ C2] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 19.233819][ C2] arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 19.233824][ C2] ? x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 19.233830][ C2] stack_trace_save (kernel/stacktrace.c:123) 
[ 19.233833][ C2] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 19.233837][ C2] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 19.233840][ C2] ? writeback_single_inode (fs/fs-writeback.c:1836) 
[ 19.233845][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 19.233848][ C2] kasan_save_stack (mm/kasan/common.c:48) 
[ 19.233852][ C2] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 19.233854][ C2] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 19.233857][ C2] ? __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) 
[ 19.233860][ C2] ? kmem_cache_free (./include/linux/kmemleak.h:49 mm/slub.c:2305 mm/slub.c:4642 mm/slub.c:4744) 
[ 19.233865][ C2] ? exit_mmap (mm/mmap.c:1311) 
[ 19.233867][ C2] ? mmput (kernel/fork.c:1446 kernel/fork.c:1381 kernel/fork.c:1401) 
[ 19.233872][ C2] ? exit_mm (kernel/exit.c:590) 
[ 19.233874][ C2] ? do_exit (kernel/exit.c:943) 
[ 19.233876][ C2] ? do_group_exit (kernel/exit.c:1083) 
[ 19.233879][ C2] ? __x64_sys_exit_group (kernel/exit.c:1111) 
[ 19.233882][ C2] ? 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) 
[ 19.233885][ C2] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 19.233888][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 19.233892][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 19.233896][ C2] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 19.233899][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 19.233903][ C2] ? debug_object_active_state (lib/debugobjects.c:1056) 
[ 19.233910][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 19.233913][ C2] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2127 arch/x86/mm/physaddr.c:65) 
[ 19.233916][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 19.233919][ C2] ? trace_lock_release (./include/trace/events/lock.h:69 (discriminator 21)) 
[ 19.233922][ C2] ? lock_release (kernel/locking/lockdep.c:118 kernel/locking/lockdep.c:5879) 
[ 19.233926][ C2] ? __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) 
[ 19.233928][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 19.233932][ C2] kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 19.233935][ C2] ? __pfx_free_object_rcu (mm/kmemleak.c:524) 
[ 19.233939][ C2] __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) 
[ 19.233944][ C2] kmem_cache_free (./include/linux/kmemleak.h:49 mm/slub.c:2305 mm/slub.c:4642 mm/slub.c:4744) 
[ 19.233948][ C2] ? exit_mmap (mm/mmap.c:1311) 
[ 19.233951][ C2] exit_mmap (mm/mmap.c:1311) 
[ 19.233954][ C2] ? __pfx_exit_mmap (mm/mmap.c:1259) 
[ 19.233957][ C2] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:727 kernel/locking/mutex.c:746) 
[ 19.233960][ C2] ? lock_release (kernel/locking/lockdep.c:118 kernel/locking/lockdep.c:5879) 
[ 19.233964][ C2] ? __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) 
[ 19.233974][ C2] mmput (kernel/fork.c:1446 kernel/fork.c:1381 kernel/fork.c:1401) 
[ 19.233978][ C2] exit_mm (kernel/exit.c:590) 
[ 19.233981][ C2] do_exit (kernel/exit.c:943) 
[ 19.233984][ C2] do_group_exit (kernel/exit.c:1083) 
[ 19.233988][ C2] __x64_sys_exit_group (kernel/exit.c:1111) 
[ 19.233991][ C2] x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 19.233994][ C2] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 19.233999][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   19.234002][    C2] RIP: 0033:0x7fcc8bd5eabd
[ 19.234005][ C2] Code: Unable to access opcode bytes at 0x7fcc8bd5ea93.

Code starting with the faulting instruction
===========================================
[   19.234006][    C2] RSP: 002b:00007ffc496e15c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   19.234009][    C2] RAX: ffffffffffffffda RBX: 00007fcc8be3b9c0 RCX: 00007fcc8bd5eabd
[   19.234011][    C2] RDX: 00000000000000e7 RSI: ffffffffffffff80 RDI: 0000000000000000
[   19.234013][    C2] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000030
[   19.234015][    C2] R10: 00007ffc496e1450 R11: 0000000000000246 R12: 00007fcc8be3b9c0


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