======================================
| [   19.226445][    C0] 1 lock held by swapper/0/0:
| [ 19.226835][ C0] #0: ffffffff911749c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) 
| [   19.227271][    C0]
| [   19.227271][    C0] stack backtrace:
[   19.227565][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   19.227567][    C0] Call Trace:
[   19.227569][    C0]  <IRQ>
[ 19.227570][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 19.227578][ C0] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) 
[ 19.227584][ C0] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) 
[ 19.227588][ C0] ? is_bpf_text_address (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 kernel/bpf/core.c:774) 
[ 19.227595][ C0] ? __lock_release (kernel/locking/lockdep.c:5534) 
[ 19.227599][ C0] ? save_trace (kernel/locking/lockdep.c:594) 
[ 19.227604][ C0] mark_lock (kernel/locking/lockdep.c:4754) 
[ 19.227608][ C0] mark_usage (kernel/locking/lockdep.c:4643) 
[ 19.227612][ C0] __lock_acquire (kernel/locking/lockdep.c:5189) 
[ 19.227617][ C0] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 19.227620][ C0] ? simple_pin_fs (fs/libfs.c:1066) 
[ 19.227623][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 19.227631][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 19.227633][ C0] ? simple_pin_fs (fs/libfs.c:1066) 
[ 19.227637][ C0] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 19.227640][ C0] ? simple_pin_fs (fs/libfs.c:1066) 
[ 19.227642][ C0] simple_pin_fs (fs/libfs.c:1066) 
[ 19.227645][ C0] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 19.227649][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 19.227656][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 19.227659][ 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) 
[ 19.227667][ C0] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 19.227670][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 19.227673][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 19.227676][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 19.227682][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 19.227686][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 19.227689][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 19.227692][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 19.227694][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 19.227701][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 19.227704][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 19.227707][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 19.227710][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 19.227717][ C0] __put_net (net/core/net_namespace.c:732) 
[ 19.227722][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 19.227726][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 19.227729][ C0] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 19.227733][ C0] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 19.227737][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 19.227740][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 19.227744][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 19.227747][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 19.227752][ C0] rcu_core (kernel/rcu/tree.c:2826) 
[ 19.227757][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 19.227761][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 19.227764][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 19.227766][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   19.227770][    C0]  </IRQ>
[   19.227771][    C0]  <TASK>
[ 19.227772][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 19.227775][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 19.227780][ C0] 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
[   19.227782][    C0] RSP: 0018:ffffffff90e07df8 EFLAGS: 00000246
[   19.227786][    C0] RAX: 0000000000070cf9 RBX: 1ffffffff21c0fc3 RCX: ffffffff9015ba19
[   19.227788][    C0] RDX: 0000000000000000 RSI: ffffffff90c87785 RDI: ffffffff90451260
[   19.227790][    C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c0667a
[   19.227792][    C0] R10: ffff8880360333d3 R11: 0000000000000000 R12: 0000000000000000
[   19.227793][    C0] R13: ffffffff90e1f240 R14: dffffc0000000000 R15: 0000000000014770
[ 19.227798][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 19.227803][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 19.227805][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 19.227807][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 19.227811][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 19.227816][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 19.227824][ C0] do_idle (kernel/sched/idle.c:325) 
[ 19.227828][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 19.227831][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 19.227835][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 19.227839][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:501) 
[ 19.227844][ C0] x86_64_start_kernel (arch/x86/kernel/head64.c:443 (discriminator 17)) 
[ 19.227848][ C0] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   19.248991][    C0] RCU nest depth: 0, expected: 0
| [   19.249255][    C0] INFO: lockdep is turned off.
| [   19.249617][    C0] Preemption disabled at:
| [ 19.249619][ C0] schedule_preempt_disabled (kernel/sched/core.c:6919) 
[   19.250224][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   19.250227][    C0] Call Trace:
[   19.250230][    C0]  <IRQ>
[ 19.250233][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 19.250242][ C0] __might_resched (kernel/sched/core.c:8819) 
[ 19.250252][ C0] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 19.250258][ C0] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 19.250263][ C0] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 19.250270][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 19.250278][ 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) 
[ 19.250286][ C0] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 19.250290][ C0] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 19.250296][ 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) 
[ 19.250305][ C0] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 19.250310][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 19.250318][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 19.250323][ 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) 
[ 19.250329][ C0] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 19.250333][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 19.250336][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 19.250340][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 19.250344][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 19.250348][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 19.250352][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 19.250354][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 19.250357][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 19.250361][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 19.250364][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 19.250367][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 19.250370][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 19.250377][ C0] __put_net (net/core/net_namespace.c:732) 
[ 19.250381][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 19.250385][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 19.250388][ C0] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 19.250392][ C0] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 19.250398][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 19.250402][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 19.250406][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 19.250409][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 19.250414][ C0] rcu_core (kernel/rcu/tree.c:2826) 
[ 19.250418][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 19.250426][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 19.250430][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 19.250436][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   19.250442][    C0]  </IRQ>
[   19.250443][    C0]  <TASK>
[ 19.250446][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 19.250451][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 19.250457][ C0] 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
[   19.250461][    C0] RSP: 0018:ffffffff90e07df8 EFLAGS: 00000246
[   19.250466][    C0] RAX: 0000000000070cf9 RBX: 1ffffffff21c0fc3 RCX: ffffffff9015ba19
[   19.250470][    C0] RDX: 0000000000000000 RSI: ffffffff90c87785 RDI: ffffffff90451260
[   19.250473][    C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c0667a
[   19.250476][    C0] R10: ffff8880360333d3 R11: 0000000000000000 R12: 0000000000000000
[   19.250479][    C0] R13: ffffffff90e1f240 R14: dffffc0000000000 R15: 0000000000014770
[ 19.250488][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 19.250497][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 19.250501][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 19.250506][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 19.250513][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 19.250520][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 19.250528][ C0] do_idle (kernel/sched/idle.c:325) 
[ 19.250532][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 19.250536][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 19.250539][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 19.250544][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:501) 
[ 19.250548][ C0] x86_64_start_kernel (arch/x86/kernel/head64.c:443 (discriminator 17)) 
[ 19.250552][ C0] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   22.976989][    C2] INFO: lockdep is turned off.
| [   22.977244][    C2] Preemption disabled at:
| [ 22.977247][ 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:223) 
| [   22.977865][    C2] Tainted: [W]=WARN
[   22.977867][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   22.977869][    C2] Call Trace:
[   22.977871][    C2]  <IRQ>
[ 22.977873][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 22.977881][ C2] __might_resched (kernel/sched/core.c:8819) 
[ 22.977887][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 22.977892][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 22.977895][ C2] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 22.977900][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 22.977907][ 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) 
[ 22.977912][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 22.977915][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 22.977919][ 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) 
[ 22.977924][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 22.977927][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 22.977932][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 22.977935][ 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) 
[ 22.977942][ C2] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 22.977948][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 22.977952][ C2] ? __local_bh_enable_ip (kernel/softirq.c:407) 
[ 22.977957][ C2] ? copy_fpstate_to_sigframe (arch/x86/kernel/fpu/signal.c:231) 
[ 22.977964][ C2] ? get_sigframe (arch/x86/kernel/signal.c:163) 
[ 22.977971][ 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) 
[ 22.977974][ C2] ? handle_signal (arch/x86/kernel/signal.c:250 arch/x86/kernel/signal.c:294) 
[ 22.977976][ C2] ? arch_do_signal_or_restart (arch/x86/kernel/signal.c:340) 
[ 22.977979][ C2] ? 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) 
[ 22.977984][ C2] ? do_syscall_64 (arch/x86/entry/syscall_64.c:113) 
[ 22.977987][ C2] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 22.977992][ C2] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 22.977999][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 22.978007][ C2] __put_net (net/core/net_namespace.c:732) 
[ 22.978012][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 22.978018][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 22.978023][ C2] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 22.978031][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 22.978038][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 22.978044][ C2] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 22.978055][ C2] rcu_core (kernel/rcu/tree.c:2826) 
[ 22.978061][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 22.978067][ 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:229) 
[ 22.978074][ C2] do_softirq (kernel/softirq.c:480 kernel/softirq.c:467) 
[   22.978078][    C2]  </IRQ>
[   22.978080][    C2]  <TASK>
[ 22.978083][ C2] __local_bh_enable_ip (kernel/softirq.c:407) 
[ 22.978088][ C2] copy_fpstate_to_sigframe (arch/x86/kernel/fpu/signal.c:231) 
[ 22.978098][ C2] get_sigframe (arch/x86/kernel/signal.c:163) 
[ 22.978103][ C2] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 22.978110][ C2] ? __pfx_get_sigframe (arch/x86/kernel/signal.c:96) 
[ 22.978117][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 22.978123][ C2] ? trace_rseq_update (./include/trace/events/rseq.h:11 (discriminator 21)) 
[ 22.978133][ 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) 
[ 22.978137][ C2] ? __pfx___rseq_handle_notify_resume (kernel/rseq.c:425) 
[ 22.978142][ C2] ? __pfx_x64_setup_rt_frame (arch/x86/kernel/signal_64.c:165) 
[ 22.978145][ C2] ? __pfx___schedule (kernel/sched/core.c:6646) 
[ 22.978151][ C2] handle_signal (arch/x86/kernel/signal.c:250 arch/x86/kernel/signal.c:294) 
[ 22.978155][ C2] arch_do_signal_or_restart (arch/x86/kernel/signal.c:340) 
[ 22.978159][ C2] ? __pfx_arch_do_signal_or_restart (arch/x86/kernel/signal.c:334) 
[ 22.978165][ C2] ? __x64_sys_rt_sigsuspend (kernel/signal.c:4858 kernel/signal.c:4848 kernel/signal.c:4848) 
[ 22.978171][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 22.978175][ C2] 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) 
[ 22.978180][ C2] do_syscall_64 (arch/x86/entry/syscall_64.c:113) 
[ 22.978183][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   22.978186][    C2] RIP: 0033:0x7f499295006c
[ 22.978195][ C2] Code: Unable to access opcode bytes at 0x7f4992950042.

Code starting with the faulting instruction
===========================================
[   22.978197][    C2] RSP: 002b:00007ffd1e0b38f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000082
[   22.978201][    C2] RAX: fffffffffffffffc RBX: 00007ffd1e0b3938 RCX: 00007f499295006c
[   22.978203][    C2] RDX: 0000000000000001 RSI: 0000000000000008 RDI: 00007ffd1e0b3960
[   22.978205][    C2] RBP: 00007ffd1e0b39e0 R08: 00007ffd1e0b39e0 R09: 0000000000000000
[   22.978207][    C2] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd1e0b3960


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
schedule_preempt_disabled:dump_stack_lvl:__might_resched:down_write:simple_recursive_removal