======================================
| [   17.880996][    C3] 1 lock held by swapper/3/0:
| [ 17.881199][ C3] #0: ffffffffaf7774c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2570) 
| [   17.881563][    C3]
| [   17.881563][    C3] stack backtrace:
[   17.881815][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   17.881818][    C3] Call Trace:
[   17.881820][    C3]  <IRQ>
[ 17.881822][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 17.881828][ C3] print_usage_bug.part.0 (kernel/locking/lockdep.c:4048) 
[ 17.881833][ C3] mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4059 kernel/locking/lockdep.c:4270) 
[ 17.881837][ C3] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 17.881842][ C3] ? save_trace (kernel/locking/lockdep.c:595) 
[ 17.881848][ C3] mark_lock (kernel/locking/lockdep.c:4756) 
[ 17.881852][ C3] mark_usage (kernel/locking/lockdep.c:4645) 
[ 17.881855][ C3] __lock_acquire (kernel/locking/lockdep.c:5194) 
[ 17.881858][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 17.881862][ C3] lock_acquire.part.0 (kernel/locking/lockdep.c:473 kernel/locking/lockdep.c:5873) 
[ 17.881865][ C3] ? simple_pin_fs (fs/libfs.c:1067) 
[ 17.881869][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 17.881873][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 17.881876][ C3] ? simple_pin_fs (fs/libfs.c:1067) 
[ 17.881880][ C3] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 17.881884][ C3] ? simple_pin_fs (fs/libfs.c:1067) 
[ 17.881887][ C3] simple_pin_fs (fs/libfs.c:1067) 
[ 17.881891][ C3] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 17.881894][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:411 lib/ref_tracker.c:195) 
[ 17.881901][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 17.881904][ 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) 
[ 17.881910][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 17.881913][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 17.881916][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 17.881919][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 17.881923][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.881926][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 17.881930][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 17.881932][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.881935][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.881938][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 17.881940][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.881943][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 17.881946][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 17.881953][ C3] __put_net (net/core/net_namespace.c:732) 
[ 17.881957][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 17.881961][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 17.881964][ C3] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 17.881968][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 17.881972][ C3] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 17.881975][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 17.881978][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 17.881983][ C3] rcu_core (kernel/rcu/tree.c:2834) 
[ 17.881987][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 17.881992][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 17.881995][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 17.881998][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   17.882002][    C3]  </IRQ>
[   17.882003][    C3]  <TASK>
[ 17.882004][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.882007][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 17.882011][ C3] Code: a2 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 47 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:	a2 b5 00 c3 cc cc cc 	movabs %al,0xfccccccccc300b5
   7:	cc 0f 
   9:	1f                   	(bad)
   a:	00 90 90 90 90 90    	add    %dl,-0x6f6f6f70(%rax)
  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 47 10 00 	verw   0x104783(%rip)        # 0x1047ab
  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
[   17.882014][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000246
[   17.882017][    C3] RAX: 000000000004a4dd RBX: 1ffff9200002afc1 RCX: ffffffffae78f5d9
[   17.882019][    C3] RDX: 0000000000000000 RSI: ffffffffaf28f4e4 RDI: ffffffffaea53be0
[   17.882021][    C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c366fa
[   17.882022][    C3] R10: ffff8880361b37d3 R11: ffffffffaf411288 R12: 0000000000000000
[   17.882024][    C3] R13: ffff888001bf45c0 R14: dffffc0000000000 R15: 0000000000000000
[ 17.882028][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 17.882033][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 17.882035][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.882038][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.882041][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 17.882045][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60) 
[ 17.882049][ C3] do_idle (kernel/sched/idle.c:325) 
[ 17.882053][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.882056][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 17.882058][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 17.882063][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   17.898077][    C3] RCU nest depth: 0, expected: 0
| [   17.898250][    C3] INFO: lockdep is turned off.
| [   17.898545][    C3] Preemption disabled at:
| [ 17.898547][ C3] 0x0 
[   17.898856][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   17.898858][    C3] Call Trace:
[   17.898860][    C3]  <IRQ>
[ 17.898862][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 17.898869][ C3] __might_resched (kernel/sched/core.c:8796) 
[ 17.898876][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 17.898880][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 17.898883][ C3] ? simple_recursive_removal (fs/libfs.c:614) 
[ 17.898886][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 17.898891][ 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) 
[ 17.898896][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 17.898899][ 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) 
[ 17.898902][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 17.898908][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 17.898911][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:411 lib/ref_tracker.c:195) 
[ 17.898917][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 17.898920][ 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) 
[ 17.898924][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 17.898928][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 17.898931][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 17.898935][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 17.898939][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.898942][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 17.898945][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 17.898948][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.898951][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.898954][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 17.898957][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.898959][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 17.898963][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 17.898969][ C3] __put_net (net/core/net_namespace.c:732) 
[ 17.898972][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 17.898977][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 17.898979][ C3] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 17.898984][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 17.898987][ C3] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 17.898990][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 17.898993][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 17.898999][ C3] rcu_core (kernel/rcu/tree.c:2834) 
[ 17.899004][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 17.899009][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 17.899012][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 17.899014][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   17.899018][    C3]  </IRQ>
[   17.899019][    C3]  <TASK>
[ 17.899021][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.899023][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 17.899027][ C3] Code: a2 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 47 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:	a2 b5 00 c3 cc cc cc 	movabs %al,0xfccccccccc300b5
   7:	cc 0f 
   9:	1f                   	(bad)
   a:	00 90 90 90 90 90    	add    %dl,-0x6f6f6f70(%rax)
  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 47 10 00 	verw   0x104783(%rip)        # 0x1047ab
  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
[   17.899030][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000246
[   17.899033][    C3] RAX: 000000000004a4dd RBX: 1ffff9200002afc1 RCX: ffffffffae78f5d9
[   17.899035][    C3] RDX: 0000000000000000 RSI: ffffffffaf28f4e4 RDI: ffffffffaea53be0
[   17.899037][    C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c366fa
[   17.899038][    C3] R10: ffff8880361b37d3 R11: ffffffffaf411288 R12: 0000000000000000
[   17.899040][    C3] R13: ffff888001bf45c0 R14: dffffc0000000000 R15: 0000000000000000
[ 17.899044][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 17.899048][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 17.899051][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.899054][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.899057][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 17.899060][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60) 
[ 17.899065][ C3] do_idle (kernel/sched/idle.c:325) 
[ 17.899068][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.899071][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 17.899074][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 17.899078][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   20.289746][    C2] INFO: lockdep is turned off.
| [   20.289957][    C2] Preemption disabled at:
| [ 20.289959][ 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) 
| [   20.290394][    C2] Tainted: [W]=WARN
[   20.290396][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   20.290398][    C2] Call Trace:
[   20.290400][    C2]  <IRQ>
[ 20.290401][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 20.290409][ C2] __might_resched (kernel/sched/core.c:8796) 
[ 20.290416][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 20.290420][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 20.290423][ C2] ? simple_recursive_removal (fs/libfs.c:614) 
[ 20.290428][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 20.290432][ 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) 
[ 20.290439][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 20.290441][ 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) 
[ 20.290444][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 20.290450][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 20.290453][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:411 lib/ref_tracker.c:195) 
[ 20.290459][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 20.290463][ 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) 
[ 20.290468][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 20.290471][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 20.290474][ C2] ? __local_bh_enable_ip (kernel/softirq.c:407) 
[ 20.290479][ C2] ? copy_fpstate_to_sigframe (arch/x86/kernel/fpu/signal.c:222) 
[ 20.290481][ C2] ? get_sigframe (arch/x86/kernel/signal.c:163) 
[ 20.290487][ 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) 
[ 20.290493][ C2] ? handle_signal (arch/x86/kernel/signal.c:250 arch/x86/kernel/signal.c:294) 
[ 20.290496][ C2] ? arch_do_signal_or_restart (arch/x86/kernel/signal.c:340) 
[ 20.290500][ C2] ? exit_to_user_mode_loop (kernel/entry/common.c:113) 
[ 20.290503][ 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) 
[ 20.290507][ C2] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 20.290511][ C2] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 20.290515][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 20.290520][ C2] __put_net (net/core/net_namespace.c:732) 
[ 20.290523][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 20.290527][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 20.290530][ C2] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 20.290534][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 20.290538][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 20.290541][ C2] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 20.290548][ C2] rcu_core (kernel/rcu/tree.c:2834) 
[ 20.290552][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 20.290557][ 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) 
[ 20.290560][ C2] do_softirq (kernel/softirq.c:480 kernel/softirq.c:467) 
[   20.290563][    C2]  </IRQ>
[   20.290564][    C2]  <TASK>
[ 20.290566][ C2] __local_bh_enable_ip (kernel/softirq.c:407) 
[ 20.290569][ C2] copy_fpstate_to_sigframe (arch/x86/kernel/fpu/signal.c:222) 
[ 20.290573][ C2] ? fpu__alloc_mathframe (arch/x86/kernel/fpu/signal.c:493) 
[ 20.290576][ C2] get_sigframe (arch/x86/kernel/signal.c:163) 
[ 20.290579][ C2] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 20.290584][ C2] ? __pfx_get_sigframe (arch/x86/kernel/signal.c:96) 
[ 20.290588][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 20.290591][ C2] ? trace_rseq_update (./include/trace/events/rseq.h:11 (discriminator 21)) 
[ 20.290598][ 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) 
[ 20.290602][ C2] ? __pfx___rseq_handle_notify_resume (kernel/rseq.c:425) 
[ 20.290607][ C2] ? __pfx_x64_setup_rt_frame (arch/x86/kernel/signal_64.c:165) 
[ 20.290613][ C2] handle_signal (arch/x86/kernel/signal.c:250 arch/x86/kernel/signal.c:294) 
[ 20.290617][ C2] arch_do_signal_or_restart (arch/x86/kernel/signal.c:340) 
[ 20.290621][ C2] ? __pfx_arch_do_signal_or_restart (arch/x86/kernel/signal.c:334) 
[ 20.290627][ C2] ? __x64_sys_rt_sigsuspend (kernel/signal.c:4858 kernel/signal.c:4848 kernel/signal.c:4848) 
[ 20.290631][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 20.290635][ C2] exit_to_user_mode_loop (kernel/entry/common.c:113) 
[ 20.290639][ 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) 
[ 20.290642][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   20.290644][    C2] RIP: 0033:0x7fa647cc906c
[ 20.290652][ C2] Code: Unable to access opcode bytes at 0x7fa647cc9042.

Code starting with the faulting instruction
===========================================
[   20.290653][    C2] RSP: 002b:00007ffe1d2cf198 EFLAGS: 00000246 ORIG_RAX: 0000000000000082
[   20.290657][    C2] RAX: fffffffffffffffc RBX: 00007ffe1d2cf1d8 RCX: 00007fa647cc906c
[   20.290659][    C2] RDX: 0000000000000001 RSI: 0000000000000008 RDI: 00007ffe1d2cf200
[   20.290660][    C2] RBP: 00007ffe1d2cf280 R08: 00007ffe1d2cf280 R09: 0000000000000000
[   20.290662][    C2] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe1d2cf200


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