======================================
| [   14.931415][    C3] 1 lock held by swapper/3/0:
| [ 14.931599][ C3] #0: ffffffffa4d774c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2570) 
| [   14.931928][    C3]
| [   14.931928][    C3] stack backtrace:
[   14.932162][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   14.932164][    C3] Call Trace:
[   14.932166][    C3]  <IRQ>
[ 14.932168][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 14.932174][ C3] print_usage_bug.part.0 (kernel/locking/lockdep.c:4048) 
[ 14.932178][ C3] mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4059 kernel/locking/lockdep.c:4270) 
[ 14.932183][ C3] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 14.932187][ C3] ? save_trace (kernel/locking/lockdep.c:595) 
[ 14.932194][ C3] mark_lock (kernel/locking/lockdep.c:4756) 
[ 14.932197][ C3] mark_usage (kernel/locking/lockdep.c:4645) 
[ 14.932200][ C3] __lock_acquire (kernel/locking/lockdep.c:5194) 
[ 14.932203][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 14.932208][ C3] lock_acquire.part.0 (kernel/locking/lockdep.c:473 kernel/locking/lockdep.c:5873) 
[ 14.932211][ C3] ? simple_pin_fs (fs/libfs.c:1067) 
[ 14.932215][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 14.932219][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 14.932221][ C3] ? simple_pin_fs (fs/libfs.c:1067) 
[ 14.932226][ C3] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 14.932229][ C3] ? simple_pin_fs (fs/libfs.c:1067) 
[ 14.932233][ C3] simple_pin_fs (fs/libfs.c:1067) 
[ 14.932237][ C3] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 14.932240][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 14.932246][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 14.932249][ C3] ? __sk_destruct (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:400 ./include/linux/refcount.h:389 ./include/linux/refcount.h:432 ./include/linux/refcount.h:450 ./include/net/net_namespace.h:287 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 14.932255][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 14.932258][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 14.932261][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 14.932264][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 14.932269][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.932273][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 14.932276][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 14.932279][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 14.932282][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 14.932285][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 14.932287][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 14.932290][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 14.932294][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 14.932301][ C3] __put_net (net/core/net_namespace.c:732) 
[ 14.932304][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 14.932309][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 14.932311][ C3] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 14.932314][ C3] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 14.932318][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 14.932322][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 14.932326][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 14.932329][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 14.932333][ C3] rcu_core (kernel/rcu/tree.c:2834) 
[ 14.932338][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 14.932343][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 14.932346][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 14.932349][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   14.932353][    C3]  </IRQ>
[   14.932354][    C3]  <TASK>
[ 14.932355][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.932358][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 14.932362][ C3] Code: 92 b5 00 c3 cc cc cc cc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 83 37 10 00 fb f4 <e9> fc 54 02 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
All code
========
   0:	92                   	xchg   %eax,%edx
   1:	b5 00                	mov    $0x0,%ch
   3:	c3                   	ret
   4:	cc                   	int3
   5:	cc                   	int3
   6:	cc                   	int3
   7:	cc                   	int3
   8:	0f 1f 00             	nopl   (%rax)
   b:	90                   	nop
   c:	90                   	nop
   d:	90                   	nop
   e:	90                   	nop
   f:	90                   	nop
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
  16:	90                   	nop
  17:	90                   	nop
  18:	90                   	nop
  19:	90                   	nop
  1a:	90                   	nop
  1b:	f3 0f 1e fa          	endbr64
  1f:	66 90                	xchg   %ax,%ax
  21:	0f 00 2d 83 37 10 00 	verw   0x103783(%rip)        # 0x1037ab
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	e9 fc 54 02 00       	jmp    0x2552b		<-- trapping instruction
  2f:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  36:	00 00 00 
  39:	66 90                	xchg   %ax,%ax
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	90                   	nop
  3f:	90                   	nop

Code starting with the faulting instruction
===========================================
   0:	e9 fc 54 02 00       	jmp    0x25501
   5:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   c:	00 00 00 
   f:	66 90                	xchg   %ax,%ax
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
[   14.932365][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000242
[   14.932368][    C3] RAX: 0000000000044f43 RBX: 1ffff9200002afc1 RCX: ffffffffa3d905d9
[   14.932370][    C3] RDX: 0000000000000000 RSI: ffffffffa488f4e4 RDI: ffffffffa4053be0
[   14.932372][    C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c366fa
[   14.932373][    C3] R10: ffff8880361b37d3 R11: ffffffffa4a11288 R12: 0000000000000000
[   14.932375][    C3] R13: ffff888001bf45c0 R14: dffffc0000000000 R15: 0000000000000000
[ 14.932379][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 14.932383][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 14.932386][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 14.932388][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 14.932391][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 14.932395][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60) 
[ 14.932399][ C3] do_idle (kernel/sched/idle.c:325) 
[ 14.932403][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 14.932406][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 14.932409][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 14.932413][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   14.947994][    C3] RCU nest depth: 0, expected: 0
| [   14.948175][    C3] INFO: lockdep is turned off.
| [   14.948346][    C3] Preemption disabled at:
| [ 14.948348][ C3] 0x0 
[   14.948653][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   14.948655][    C3] Call Trace:
[   14.948656][    C3]  <IRQ>
[ 14.948658][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 14.948664][ C3] __might_resched (kernel/sched/core.c:8796) 
[ 14.948671][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 14.948675][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 14.948678][ C3] ? simple_recursive_removal (fs/libfs.c:614) 
[ 14.948682][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 14.948686][ 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) 
[ 14.948691][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 14.948694][ 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) 
[ 14.948697][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 14.948702][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 14.948705][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 14.948709][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 14.948712][ C3] ? __sk_destruct (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:400 ./include/linux/refcount.h:389 ./include/linux/refcount.h:432 ./include/linux/refcount.h:450 ./include/net/net_namespace.h:287 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 14.948717][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 14.948720][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 14.948723][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 14.948727][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 14.948732][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.948735][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 14.948738][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 14.948740][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 14.948743][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 14.948746][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 14.948749][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 14.948751][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 14.948754][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 14.948760][ C3] __put_net (net/core/net_namespace.c:732) 
[ 14.948763][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 14.948767][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 14.948769][ C3] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 14.948772][ C3] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 14.948777][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 14.948781][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 14.948785][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 14.948788][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 14.948793][ C3] rcu_core (kernel/rcu/tree.c:2834) 
[ 14.948797][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 14.948803][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 14.948805][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 14.948808][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   14.948812][    C3]  </IRQ>
[   14.948813][    C3]  <TASK>
[ 14.948814][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.948817][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 14.948821][ C3] Code: 92 b5 00 c3 cc cc cc cc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 83 37 10 00 fb f4 <e9> fc 54 02 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
All code
========
   0:	92                   	xchg   %eax,%edx
   1:	b5 00                	mov    $0x0,%ch
   3:	c3                   	ret
   4:	cc                   	int3
   5:	cc                   	int3
   6:	cc                   	int3
   7:	cc                   	int3
   8:	0f 1f 00             	nopl   (%rax)
   b:	90                   	nop
   c:	90                   	nop
   d:	90                   	nop
   e:	90                   	nop
   f:	90                   	nop
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
  16:	90                   	nop
  17:	90                   	nop
  18:	90                   	nop
  19:	90                   	nop
  1a:	90                   	nop
  1b:	f3 0f 1e fa          	endbr64
  1f:	66 90                	xchg   %ax,%ax
  21:	0f 00 2d 83 37 10 00 	verw   0x103783(%rip)        # 0x1037ab
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	e9 fc 54 02 00       	jmp    0x2552b		<-- trapping instruction
  2f:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  36:	00 00 00 
  39:	66 90                	xchg   %ax,%ax
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	90                   	nop
  3f:	90                   	nop

Code starting with the faulting instruction
===========================================
   0:	e9 fc 54 02 00       	jmp    0x25501
   5:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   c:	00 00 00 
   f:	66 90                	xchg   %ax,%ax
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
[   14.948823][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000242
[   14.948826][    C3] RAX: 0000000000044f43 RBX: 1ffff9200002afc1 RCX: ffffffffa3d905d9
[   14.948828][    C3] RDX: 0000000000000000 RSI: ffffffffa488f4e4 RDI: ffffffffa4053be0
[   14.948830][    C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c366fa
[   14.948831][    C3] R10: ffff8880361b37d3 R11: ffffffffa4a11288 R12: 0000000000000000
[   14.948833][    C3] R13: ffff888001bf45c0 R14: dffffc0000000000 R15: 0000000000000000
[ 14.948836][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 14.948841][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 14.948844][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 14.948846][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 14.948849][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 14.948853][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60) 
[ 14.948857][ C3] do_idle (kernel/sched/idle.c:325) 
[ 14.948860][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 14.948863][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 14.948866][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 14.948871][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   16.647995][    C2] INFO: lockdep is turned off.
| [   16.648188][    C2] Preemption disabled at:
| [ 16.648190][ C2] copy_fpstate_to_sigframe (./include/linux/instrumented.h:68 ./include/asm-generic/bitops/instrumented-non-atomic.h:141 ./include/linux/thread_info.h:126 arch/x86/kernel/fpu/signal.c:214) 
| [   16.648610][    C2] Tainted: [W]=WARN
[   16.648612][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.648614][    C2] Call Trace:
[   16.648616][    C2]  <IRQ>
[ 16.648617][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 16.648625][ C2] __might_resched (kernel/sched/core.c:8796) 
[ 16.648631][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 16.648635][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 16.648638][ C2] ? simple_recursive_removal (fs/libfs.c:614) 
[ 16.648643][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.648648][ 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) 
[ 16.648654][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 16.648657][ 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) 
[ 16.648660][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 16.648665][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 16.648668][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 16.648674][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 16.648678][ C2] ? __sk_destruct (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:400 ./include/linux/refcount.h:389 ./include/linux/refcount.h:432 ./include/linux/refcount.h:450 ./include/net/net_namespace.h:287 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 16.648684][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.648687][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 16.648690][ C2] ? __local_bh_enable_ip (kernel/softirq.c:407) 
[ 16.648694][ C2] ? copy_fpstate_to_sigframe (arch/x86/kernel/fpu/signal.c:222) 
[ 16.648697][ C2] ? get_sigframe (arch/x86/kernel/signal.c:163) 
[ 16.648702][ C2] ? x64_setup_rt_frame (./arch/x86/include/asm/bitops.h:206 ./arch/x86/include/asm/bitops.h:238 arch/x86/kernel/signal_64.c:153 arch/x86/kernel/signal_64.c:176) 
[ 16.648705][ C2] ? handle_signal (arch/x86/kernel/signal.c:250 arch/x86/kernel/signal.c:294) 
[ 16.648708][ C2] ? arch_do_signal_or_restart (arch/x86/kernel/signal.c:340) 
[ 16.648711][ C2] ? exit_to_user_mode_loop (kernel/entry/common.c:113) 
[ 16.648715][ C2] ? do_syscall_64 (./include/linux/entry-common.h:330 ./include/linux/entry-common.h:414 ./include/linux/entry-common.h:449 arch/x86/entry/syscall_64.c:100) 
[ 16.648719][ C2] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 16.648723][ C2] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 16.648727][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.648731][ C2] __put_net (net/core/net_namespace.c:732) 
[ 16.648735][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 16.648739][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.648741][ C2] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.648746][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 16.648749][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.648752][ C2] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 16.648759][ C2] rcu_core (kernel/rcu/tree.c:2834) 
[ 16.648764][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 16.648768][ C2] ? copy_fpstate_to_sigframe (./include/linux/bottom_half.h:33 ./arch/x86/include/asm/fpu/api.h:77 arch/x86/kernel/fpu/signal.c:220) 
[ 16.648771][ C2] do_softirq (kernel/softirq.c:480 kernel/softirq.c:467) 
[   16.648774][    C2]  </IRQ>
[   16.648775][    C2]  <TASK>
[ 16.648777][ C2] __local_bh_enable_ip (kernel/softirq.c:407) 
[ 16.648780][ C2] copy_fpstate_to_sigframe (arch/x86/kernel/fpu/signal.c:222) 
[ 16.648784][ C2] ? fpu__alloc_mathframe (arch/x86/kernel/fpu/signal.c:493) 
[ 16.648788][ C2] get_sigframe (arch/x86/kernel/signal.c:163) 
[ 16.648792][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.648795][ C2] ? __pfx_get_sigframe (arch/x86/kernel/signal.c:96) 
[ 16.648798][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.648801][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.648804][ C2] ? trace_rseq_update (./include/trace/events/rseq.h:11 (discriminator 21)) 
[ 16.648811][ C2] x64_setup_rt_frame (./arch/x86/include/asm/bitops.h:206 ./arch/x86/include/asm/bitops.h:238 arch/x86/kernel/signal_64.c:153 arch/x86/kernel/signal_64.c:176) 
[ 16.648816][ C2] ? __pfx___rseq_handle_notify_resume (kernel/rseq.c:425) 
[ 16.648820][ C2] ? __pfx_x64_setup_rt_frame (arch/x86/kernel/signal_64.c:165) 
[ 16.648826][ C2] handle_signal (arch/x86/kernel/signal.c:250 arch/x86/kernel/signal.c:294) 
[ 16.648830][ C2] arch_do_signal_or_restart (arch/x86/kernel/signal.c:340) 
[ 16.648834][ C2] ? __pfx_arch_do_signal_or_restart (arch/x86/kernel/signal.c:334) 
[ 16.648840][ C2] ? do_user_addr_fault (./arch/x86/include/asm/atomic.h:93 ./include/linux/atomic/atomic-arch-fallback.h:949 ./include/linux/atomic/atomic-instrumented.h:401 ./include/linux/refcount.h:389 ./include/linux/refcount.h:432 ./include/linux/mm.h:704 ./include/linux/mm.h:799 arch/x86/mm/fault.c:1338) 
[ 16.648843][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.648847][ C2] exit_to_user_mode_loop (kernel/entry/common.c:113) 
[ 16.648851][ C2] do_syscall_64 (./include/linux/entry-common.h:330 ./include/linux/entry-common.h:414 ./include/linux/entry-common.h:449 arch/x86/entry/syscall_64.c:100) 
[ 16.648854][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   16.648857][    C2] RIP: 0033:0x7fd7070d683b
[ 16.648860][ C2] Code: 48 85 f6 74 15 48 b9 00 00 00 80 01 00 00 00 48 8b 06 48 85 c8 75 48 49 89 f0 41 ba 08 00 00 00 4c 89 c6 b8 0e 00 00 00 0f 05 <89> c2 f7 da 3d 00 f0 ff ff b8 00 00 00 00 0f 47 c2 48 8b 94 24 88
All code
========
   0:	48 85 f6             	test   %rsi,%rsi
   3:	74 15                	je     0x1a
   5:	48 b9 00 00 00 80 01 	movabs $0x180000000,%rcx
   c:	00 00 00 
   f:	48 8b 06             	mov    (%rsi),%rax
  12:	48 85 c8             	test   %rcx,%rax
  15:	75 48                	jne    0x5f
  17:	49 89 f0             	mov    %rsi,%r8
  1a:	41 ba 08 00 00 00    	mov    $0x8,%r10d
  20:	4c 89 c6             	mov    %r8,%rsi
  23:	b8 0e 00 00 00       	mov    $0xe,%eax
  28:	0f 05                	syscall
  2a:*	89 c2                	mov    %eax,%edx		<-- trapping instruction
  2c:	f7 da                	neg    %edx
  2e:	3d 00 f0 ff ff       	cmp    $0xfffff000,%eax
  33:	b8 00 00 00 00       	mov    $0x0,%eax
  38:	0f 47 c2             	cmova  %edx,%eax
  3b:	48                   	rex.W
  3c:	8b                   	.byte 0x8b
  3d:	94                   	xchg   %eax,%esp
  3e:	24 88                	and    $0x88,%al

Code starting with the faulting instruction
===========================================
   0:	89 c2                	mov    %eax,%edx
   2:	f7 da                	neg    %edx
   4:	3d 00 f0 ff ff       	cmp    $0xfffff000,%eax
   9:	b8 00 00 00 00       	mov    $0x0,%eax
   e:	0f 47 c2             	cmova  %edx,%eax
  11:	48                   	rex.W
  12:	8b                   	.byte 0x8b
  13:	94                   	xchg   %eax,%esp
  14:	24 88                	and    $0x88,%al
[   16.648863][    C2] RSP: 002b:00007ffd94288610 EFLAGS: 00000246 ORIG_RAX: 000000000000000e
[   16.648866][    C2] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fd7070d683b
[   16.648868][    C2] RDX: 0000000000000000 RSI: 00007ffd942886d0 RDI: 0000000000000002
[   16.648870][    C2] RBP: 0000000000000000 R08: 00007ffd942886d0 R09: 0000000000000000
[   16.648871][    C2] R10: 0000000000000008 R11: 0000000000000246 R12: 0000556d4eaa2620


Finger prints:
copy_fpstate_to_sigframe:dump_stack_lvl:__might_resched:down_write:simple_recursive_removal
mark_lock_irq:mark_lock:mark_usage:__lock_acquire:_raw_spin_lock
__might_resched:down_write:simple_recursive_removal:debugfs_remove:ref_tracker_dir_exit