======================================
| [   14.414413][    C2] 1 lock held by swapper/2/0:
| [ 14.414591][ C2] #0: ffffffffac774480 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) 
| [   14.414915][    C2]
| [   14.414915][    C2] stack backtrace:
[   14.415141][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   14.415143][    C2] Call Trace:
[   14.415145][    C2]  <IRQ>
[ 14.415147][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 14.415154][ C2] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) 
[ 14.415159][ C2] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) 
[ 14.415164][ C2] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 14.415170][ C2] ? save_trace (kernel/locking/lockdep.c:594) 
[ 14.415175][ C2] mark_lock (kernel/locking/lockdep.c:4754) 
[ 14.415179][ C2] mark_usage (kernel/locking/lockdep.c:4643) 
[ 14.415182][ C2] __lock_acquire (kernel/locking/lockdep.c:5189) 
[ 14.415188][ C2] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 14.415191][ C2] ? simple_pin_fs (fs/libfs.c:1066) 
[ 14.415195][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 14.415203][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 14.415207][ C2] ? simple_pin_fs (fs/libfs.c:1066) 
[ 14.415211][ C2] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 14.415214][ C2] ? simple_pin_fs (fs/libfs.c:1066) 
[ 14.415218][ C2] simple_pin_fs (fs/libfs.c:1066) 
[ 14.415221][ C2] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 14.415225][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 14.415231][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 14.415234][ 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) 
[ 14.415241][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.415244][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 14.415247][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 14.415250][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 14.415254][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.415258][ C2] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 14.415261][ C2] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 14.415263][ C2] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 14.415265][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 14.415271][ C2] ? do_idle (kernel/sched/idle.c:325) 
[ 14.415274][ C2] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 14.415277][ C2] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 14.415284][ C2] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 14.415291][ C2] __put_net (net/core/net_namespace.c:732) 
[ 14.415296][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 14.415299][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.415302][ C2] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.415306][ C2] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 14.415310][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 14.415314][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 14.415317][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 14.415321][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 14.415325][ C2] rcu_core (kernel/rcu/tree.c:2826) 
[ 14.415329][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 14.415333][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 14.415335][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 14.415338][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   14.415341][    C2]  </IRQ>
[   14.415342][    C2]  <TASK>
[ 14.415344][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.415347][ C2] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 14.415351][ 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
[   14.415354][    C2] RSP: 0018:ffffc90000147de8 EFLAGS: 00000242
[   14.415357][    C2] RAX: 000000000003dfcd RBX: 1ffff92000028fc1 RCX: ffffffffab755a19
[   14.415359][    C2] RDX: 0000000000000000 RSI: ffffffffac285f31 RDI: ffffffffaba50ce0
[   14.415361][    C2] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c2667a
[   14.415363][    C2] R10: ffff8880361333d3 R11: 0000000000000000 R12: 0000000000000000
[   14.415365][    C2] R13: ffff888001bb2340 R14: dffffc0000000000 R15: 0000000000000000
[ 14.415369][ C2] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 14.415374][ C2] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 14.415376][ C2] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 14.415379][ C2] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 14.415382][ C2] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 14.415386][ C2] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 14.415392][ C2] do_idle (kernel/sched/idle.c:325) 
[ 14.415396][ C2] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 14.415399][ C2] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 14.415402][ C2] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 14.415407][ C2] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   14.430772][    C2] RCU nest depth: 0, expected: 0
| [   14.431049][    C2] INFO: lockdep is turned off.
| [   14.431226][    C2] Preemption disabled at:
| [ 14.431228][ C2] 0x0 
[   14.431545][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   14.431546][    C2] Call Trace:
[   14.431548][    C2]  <IRQ>
[ 14.431550][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 14.431556][ C2] __might_resched (kernel/sched/core.c:8819) 
[ 14.431562][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 14.431566][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 14.431569][ C2] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 14.431573][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 14.431579][ 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) 
[ 14.431584][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 14.431586][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 14.431590][ 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) 
[ 14.431594][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 14.431597][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 14.431602][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 14.431605][ 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) 
[ 14.431610][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.431614][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 14.431617][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 14.431620][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 14.431624][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.431628][ C2] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 14.431631][ C2] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 14.431633][ C2] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 14.431635][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 14.431639][ C2] ? do_idle (kernel/sched/idle.c:325) 
[ 14.431642][ C2] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 14.431645][ C2] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 14.431650][ C2] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 14.431655][ C2] __put_net (net/core/net_namespace.c:732) 
[ 14.431658][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 14.431662][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.431665][ C2] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.431669][ C2] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 14.431673][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 14.431677][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 14.431681][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 14.431685][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 14.431689][ C2] rcu_core (kernel/rcu/tree.c:2826) 
[ 14.431692][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 14.431697][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 14.431699][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 14.431702][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   14.431705][    C2]  </IRQ>
[   14.431706][    C2]  <TASK>
[ 14.431707][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.431710][ C2] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 14.431714][ 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
[   14.431716][    C2] RSP: 0018:ffffc90000147de8 EFLAGS: 00000242
[   14.431719][    C2] RAX: 000000000003dfcd RBX: 1ffff92000028fc1 RCX: ffffffffab755a19
[   14.431721][    C2] RDX: 0000000000000000 RSI: ffffffffac285f31 RDI: ffffffffaba50ce0
[   14.431723][    C2] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c2667a
[   14.431724][    C2] R10: ffff8880361333d3 R11: 0000000000000000 R12: 0000000000000000
[   14.431726][    C2] R13: ffff888001bb2340 R14: dffffc0000000000 R15: 0000000000000000
[ 14.431730][ C2] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 14.431735][ C2] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 14.431737][ C2] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 14.431739][ C2] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 14.431745][ C2] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 14.431749][ C2] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 14.431754][ C2] do_idle (kernel/sched/idle.c:325) 
[ 14.431758][ C2] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 14.431761][ C2] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 14.431765][ C2] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 14.431770][ C2] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   16.064035][    C2] INFO: lockdep is turned off.
| [   16.064211][    C2] Preemption disabled at:
| [ 16.064213][ C2] 0x0 
| [   16.064534][    C2] Tainted: [W]=WARN
[   16.064536][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.064538][    C2] Call Trace:
[   16.064540][    C2]  <IRQ>
[ 16.064541][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 16.064550][ C2] __might_resched (kernel/sched/core.c:8819) 
[ 16.064557][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 16.064560][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 16.064563][ C2] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 16.064568][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.064574][ 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) 
[ 16.064578][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 16.064581][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 16.064585][ 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) 
[ 16.064589][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 16.064592][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 16.064597][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 16.064600][ 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) 
[ 16.064605][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 16.064610][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 16.064612][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 16.064616][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 16.064621][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.064625][ C2] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 16.064628][ C2] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 16.064630][ C2] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 16.064632][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 16.064637][ C2] ? do_idle (kernel/sched/idle.c:325) 
[ 16.064640][ C2] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 16.064643][ C2] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 16.064648][ C2] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 16.064652][ C2] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 16.064657][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.064662][ C2] __put_net (net/core/net_namespace.c:732) 
[ 16.064665][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 16.064669][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 16.064672][ C2] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 16.064677][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 16.064681][ C2] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 16.064686][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 16.064691][ C2] rcu_core (kernel/rcu/tree.c:2826) 
[ 16.064695][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 16.064699][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 16.064702][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 16.064704][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   16.064707][    C2]  </IRQ>
[   16.064709][    C2]  <TASK>
[ 16.064710][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.064713][ C2] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 16.064717][ 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
[   16.064720][    C2] RSP: 0018:ffffc90000147de8 EFLAGS: 00000246
[   16.064723][    C2] RAX: 0000000000000002 RBX: 1ffff92000028fc1 RCX: ffffffffab755a19
[   16.064725][    C2] RDX: ffffed1006c2667b RSI: ffffffffaba50c60 RDI: ffffffffa8f84d8f
[   16.064727][    C2] RBP: 0000000000000000 R08: 0000000000000000 R09: ffffed1006c2667a
[   16.064729][    C2] R10: ffff8880361333d3 R11: ffffffffaf12ebc0 R12: 0000000000000000
[   16.064731][    C2] R13: ffff888001bb2340 R14: dffffc0000000000 R15: 0000000000000000
[ 16.064734][ C2] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 16.064738][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 16.064746][ C2] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 16.064748][ C2] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 16.064750][ C2] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 16.064754][ C2] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 16.064758][ C2] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 16.064763][ C2] do_idle (kernel/sched/idle.c:325) 
[ 16.064767][ C2] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 16.064770][ C2] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 16.064774][ C2] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 


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