======================================
| [   15.255748][    C2] 1 lock held by swapper/2/0:
| [ 15.255934][ C2] #0: ffffffffacd749c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) 
| [   15.256264][    C2]
| [   15.256264][    C2] stack backtrace:
[   15.256498][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.256501][    C2] Call Trace:
[   15.256502][    C2]  <IRQ>
[ 15.256505][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.256510][ C2] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) 
[ 15.256516][ C2] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) 
[ 15.256521][ C2] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 15.256526][ C2] ? save_trace (kernel/locking/lockdep.c:594) 
[ 15.256531][ C2] mark_lock (kernel/locking/lockdep.c:4754) 
[ 15.256535][ C2] mark_usage (kernel/locking/lockdep.c:4643) 
[ 15.256539][ C2] __lock_acquire (kernel/locking/lockdep.c:5189) 
[ 15.256544][ C2] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 15.256547][ C2] ? simple_pin_fs (fs/libfs.c:1066) 
[ 15.256550][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 15.256556][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 15.256558][ C2] ? simple_pin_fs (fs/libfs.c:1066) 
[ 15.256561][ C2] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 15.256564][ C2] ? simple_pin_fs (fs/libfs.c:1066) 
[ 15.256566][ C2] simple_pin_fs (fs/libfs.c:1066) 
[ 15.256569][ C2] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 15.256573][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 15.256578][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 15.256581][ 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:2366) 
[ 15.256586][ C2] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 15.256590][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 15.256593][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.256595][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 15.256600][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.256603][ C2] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.256606][ C2] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.256608][ C2] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.256611][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.256615][ C2] ? do_idle (kernel/sched/idle.c:325) 
[ 15.256618][ C2] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.256621][ C2] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.256626][ C2] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 15.256632][ C2] __put_net (net/core/net_namespace.c:732) 
[ 15.256637][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 15.256640][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.256644][ C2] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 15.256647][ C2] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 15.256652][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 15.256656][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 15.256659][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 15.256663][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.256668][ C2] rcu_core (kernel/rcu/tree.c:2826) 
[ 15.256671][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 15.256676][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.256679][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.256681][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   15.256685][    C2]  </IRQ>
[   15.256686][    C2]  <TASK>
[ 15.256687][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.256690][ C2] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.256694][ C2] Code: 60 b8 00 e9 c3 57 02 00 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 c3 75 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:	60                   	(bad)
   1:	b8 00 e9 c3 57       	mov    $0x57c3e900,%eax
   6:	02 00                	add    (%rax),%al
   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 c3 75 13 00 	verw   0x1375c3(%rip)        # 0x1375eb
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	c3                   	ret		<-- trapping instruction
  2b:	cc                   	int3
  2c:	cc                   	int3
  2d:	cc                   	int3
  2e:	cc                   	int3
  2f:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  36:	00 00 00 
  39:	66 90                	xchg   %ax,%ax
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	90                   	nop
  3f:	90                   	nop

Code starting with the faulting instruction
===========================================
   0:	c3                   	ret
   1:	cc                   	int3
   2:	cc                   	int3
   3:	cc                   	int3
   4:	cc                   	int3
   5:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   c:	00 00 00 
   f:	66 90                	xchg   %ax,%ax
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
[   15.256697][    C2] RSP: 0000:ffffc90000147de8 EFLAGS: 00000246
[   15.256700][    C2] RAX: 0000000000043f87 RBX: 1ffff92000028fc1 RCX: ffffffffabd5ba19
[   15.256702][    C2] RDX: 0000000000000000 RSI: ffffffffac887785 RDI: ffffffffac051260
[   15.256704][    C2] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c2667a
[   15.256706][    C2] R10: ffff8880361333d3 R11: 0000000000000000 R12: 0000000000000000
[   15.256708][    C2] R13: ffff888001bf2340 R14: dffffc0000000000 R15: 0000000000000000
[ 15.256711][ C2] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 15.256716][ C2] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.256719][ C2] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.256721][ C2] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.256725][ C2] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 15.256729][ C2] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 15.256734][ C2] do_idle (kernel/sched/idle.c:325) 
[ 15.256738][ C2] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.256742][ C2] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.256746][ C2] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 15.256751][ C2] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   15.272483][    C2] RCU nest depth: 0, expected: 0
| [   15.272668][    C2] INFO: lockdep is turned off.
| [   15.272854][    C2] Preemption disabled at:
| [ 15.272855][ C2] 0x0 
[   15.273196][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.273197][    C2] Call Trace:
[   15.273199][    C2]  <IRQ>
[ 15.273201][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.273208][ C2] __might_resched (kernel/sched/core.c:8819) 
[ 15.273214][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 15.273218][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 15.273221][ C2] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 15.273226][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 15.273231][ 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) 
[ 15.273236][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 15.273239][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 15.273243][ 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) 
[ 15.273247][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 15.273250][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 15.273255][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 15.273259][ 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:2366) 
[ 15.273263][ C2] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 15.273267][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 15.273270][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.273274][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 15.273278][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.273282][ C2] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.273285][ C2] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.273287][ C2] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.273290][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.273294][ C2] ? do_idle (kernel/sched/idle.c:325) 
[ 15.273298][ C2] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.273301][ C2] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.273305][ C2] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 15.273311][ C2] __put_net (net/core/net_namespace.c:732) 
[ 15.273315][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 15.273318][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.273322][ C2] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 15.273325][ C2] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 15.273330][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 15.273334][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 15.273338][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 15.273342][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.273346][ C2] rcu_core (kernel/rcu/tree.c:2826) 
[ 15.273350][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 15.273357][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.273360][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.273362][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   15.273366][    C2]  </IRQ>
[   15.273367][    C2]  <TASK>
[ 15.273369][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.273371][ C2] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.273375][ C2] Code: 60 b8 00 e9 c3 57 02 00 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 c3 75 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:	60                   	(bad)
   1:	b8 00 e9 c3 57       	mov    $0x57c3e900,%eax
   6:	02 00                	add    (%rax),%al
   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 c3 75 13 00 	verw   0x1375c3(%rip)        # 0x1375eb
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	c3                   	ret		<-- trapping instruction
  2b:	cc                   	int3
  2c:	cc                   	int3
  2d:	cc                   	int3
  2e:	cc                   	int3
  2f:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  36:	00 00 00 
  39:	66 90                	xchg   %ax,%ax
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	90                   	nop
  3f:	90                   	nop

Code starting with the faulting instruction
===========================================
   0:	c3                   	ret
   1:	cc                   	int3
   2:	cc                   	int3
   3:	cc                   	int3
   4:	cc                   	int3
   5:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   c:	00 00 00 
   f:	66 90                	xchg   %ax,%ax
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
[   15.273378][    C2] RSP: 0000:ffffc90000147de8 EFLAGS: 00000246
[   15.273381][    C2] RAX: 0000000000043f87 RBX: 1ffff92000028fc1 RCX: ffffffffabd5ba19
[   15.273384][    C2] RDX: 0000000000000000 RSI: ffffffffac887785 RDI: ffffffffac051260
[   15.273385][    C2] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c2667a
[   15.273387][    C2] R10: ffff8880361333d3 R11: 0000000000000000 R12: 0000000000000000
[   15.273389][    C2] R13: ffff888001bf2340 R14: dffffc0000000000 R15: 0000000000000000
[ 15.273393][ C2] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 15.273398][ C2] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.273400][ C2] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.273403][ C2] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.273406][ C2] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 15.273411][ C2] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 15.273416][ C2] do_idle (kernel/sched/idle.c:325) 
[ 15.273420][ C2] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.273423][ C2] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.273427][ C2] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 15.273432][ C2] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   17.077375][    C0] INFO: lockdep is turned off.
| [   17.077568][    C0] Preemption disabled at:
| [ 17.077570][ C0] 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:223) 
| [   17.078024][    C0] Tainted: [W]=WARN
[   17.078026][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   17.078028][    C0] Call Trace:
[   17.078030][    C0]  <IRQ>
[ 17.078032][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 17.078042][ C0] __might_resched (kernel/sched/core.c:8819) 
[ 17.078049][ C0] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 17.078055][ C0] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 17.078058][ C0] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 17.078064][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.078072][ C0] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 17.078079][ C0] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 17.078081][ C0] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 17.078087][ C0] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 17.078092][ C0] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 17.078095][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 17.078101][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 17.078105][ 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:2366) 
[ 17.078112][ C0] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 17.078117][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 17.078120][ C0] ? __local_bh_enable_ip (kernel/softirq.c:407) 
[ 17.078125][ C0] ? copy_fpstate_to_sigframe (arch/x86/kernel/fpu/signal.c:231) 
[ 17.078128][ C0] ? get_sigframe (arch/x86/kernel/signal.c:163) 
[ 17.078134][ C0] ? 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) 
[ 17.078137][ C0] ? handle_signal (arch/x86/kernel/signal.c:250 arch/x86/kernel/signal.c:294) 
[ 17.078140][ C0] ? arch_do_signal_or_restart (arch/x86/kernel/signal.c:340) 
[ 17.078143][ C0] ? syscall_exit_to_user_mode (kernel/entry/common.c:113 ./include/linux/entry-common.h:329 kernel/entry/common.c:207 kernel/entry/common.c:218) 
[ 17.078149][ C0] ? do_syscall_64 (arch/x86/entry/syscall_64.c:113) 
[ 17.078152][ C0] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 17.078156][ C0] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 17.078161][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.078166][ C0] __put_net (net/core/net_namespace.c:732) 
[ 17.078170][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 17.078174][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 17.078177][ C0] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 17.078183][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 17.078187][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.078191][ C0] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 17.078198][ C0] rcu_core (kernel/rcu/tree.c:2826) 
[ 17.078203][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 17.078207][ C0] ? copy_fpstate_to_sigframe (./include/linux/bottom_half.h:33 ./arch/x86/include/asm/fpu/api.h:77 arch/x86/kernel/fpu/signal.c:229) 
[ 17.078211][ C0] do_softirq (kernel/softirq.c:480 kernel/softirq.c:467) 
[   17.078214][    C0]  </IRQ>
[   17.078215][    C0]  <TASK>
[ 17.078216][ C0] __local_bh_enable_ip (kernel/softirq.c:407) 
[ 17.078219][ C0] copy_fpstate_to_sigframe (arch/x86/kernel/fpu/signal.c:231) 
[ 17.078225][ C0] get_sigframe (arch/x86/kernel/signal.c:163) 
[ 17.078228][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.078232][ C0] ? __pfx_get_sigframe (arch/x86/kernel/signal.c:96) 
[ 17.078235][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.078239][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.078242][ C0] ? trace_rseq_update (./include/trace/events/rseq.h:11 (discriminator 21)) 
[ 17.078251][ C0] 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) 
[ 17.078255][ C0] ? __pfx___rseq_handle_notify_resume (kernel/rseq.c:425) 
[ 17.078259][ C0] ? __pfx_x64_setup_rt_frame (arch/x86/kernel/signal_64.c:165) 
[ 17.078265][ C0] handle_signal (arch/x86/kernel/signal.c:250 arch/x86/kernel/signal.c:294) 
[ 17.078269][ C0] arch_do_signal_or_restart (arch/x86/kernel/signal.c:340) 
[ 17.078272][ C0] ? __pfx_arch_do_signal_or_restart (arch/x86/kernel/signal.c:334) 
[ 17.078278][ C0] ? 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:1339) 
[ 17.078284][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.078289][ C0] syscall_exit_to_user_mode (kernel/entry/common.c:113 ./include/linux/entry-common.h:329 kernel/entry/common.c:207 kernel/entry/common.c:218) 
[ 17.078293][ C0] do_syscall_64 (arch/x86/entry/syscall_64.c:113) 
[ 17.078296][ C0] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   17.078298][    C0] RIP: 0033:0x7f6d0084d83b
[ 17.078303][ C0] 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
[   17.078306][    C0] RSP: 002b:00007ffd6e9604a0 EFLAGS: 00000246 ORIG_RAX: 000000000000000e
[   17.078311][    C0] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f6d0084d83b
[   17.078313][    C0] RDX: 0000000000000000 RSI: 00007ffd6e960560 RDI: 0000000000000002
[   17.078315][    C0] RBP: 0000000000000000 R08: 00007ffd6e960560 R09: 0000000000000000
[   17.078317][    C0] R10: 0000000000000008 R11: 0000000000000246 R12: 0000557ee59d5620


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