======================================
| [   17.127214][    C3] 1 lock held by swapper/3/0:
| [ 17.127403][ C3] #0: ffffffff98b749c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) 
| [   17.127750][    C3]
| [   17.127750][    C3] stack backtrace:
[   17.127993][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   17.127995][    C3] Call Trace:
[   17.127997][    C3]  <IRQ>
[ 17.128000][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 17.128007][ C3] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) 
[ 17.128012][ C3] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) 
[ 17.128017][ C3] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 17.128024][ C3] ? save_trace (kernel/locking/lockdep.c:594) 
[ 17.128029][ C3] mark_lock (kernel/locking/lockdep.c:4754) 
[ 17.128034][ C3] mark_usage (kernel/locking/lockdep.c:4643) 
[ 17.128038][ C3] __lock_acquire (kernel/locking/lockdep.c:5189) 
[ 17.128043][ C3] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 17.128046][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 17.128049][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.128056][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 17.128058][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 17.128062][ C3] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 17.128065][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 17.128067][ C3] simple_pin_fs (fs/libfs.c:1066) 
[ 17.128070][ C3] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 17.128073][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 17.128080][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 17.128083][ 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:2366) 
[ 17.128089][ C3] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 17.128093][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 17.128096][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 17.128098][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 17.128104][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.128108][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 17.128111][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 17.128114][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.128117][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.128122][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 17.128125][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.128128][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 17.128132][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 17.128139][ C3] __put_net (net/core/net_namespace.c:732) 
[ 17.128143][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 17.128147][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 17.128150][ C3] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 17.128154][ C3] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 17.128158][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 17.128162][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 17.128166][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 17.128169][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 17.128174][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 17.128179][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 17.128184][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 17.128186][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 17.128189][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   17.128192][    C3]  </IRQ>
[   17.128193][    C3]  <TASK>
[ 17.128195][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.128198][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 17.128202][ C3] 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
[   17.128205][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000242
[   17.128209][    C3] RAX: 00000000000484f7 RBX: 1ffff9200002afc1 RCX: ffffffff97b5ba19
[   17.128211][    C3] RDX: 0000000000000000 RSI: ffffffff98687785 RDI: ffffffff97e51260
[   17.128213][    C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c3667a
[   17.128215][    C3] R10: ffff8880361b33d3 R11: 0000000000000000 R12: 0000000000000000
[   17.128216][    C3] R13: ffff888001bf4640 R14: dffffc0000000000 R15: 0000000000000000
[ 17.128220][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 17.128225][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 17.128228][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.128230][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.128234][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 17.128238][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 17.128243][ C3] do_idle (kernel/sched/idle.c:325) 
[ 17.128247][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.128251][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 17.128254][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 17.128260][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   17.144749][    C3] RCU nest depth: 0, expected: 0
| [   17.144931][    C3] INFO: lockdep is turned off.
| [   17.145109][    C3] Preemption disabled at:
| [ 17.145111][ C3] 0x0 
[   17.145425][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   17.145427][    C3] Call Trace:
[   17.145429][    C3]  <IRQ>
[ 17.145430][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 17.145437][ C3] __might_resched (kernel/sched/core.c:8819) 
[ 17.145444][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 17.145449][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 17.145452][ C3] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 17.145457][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.145463][ 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) 
[ 17.145468][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 17.145471][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 17.145476][ 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) 
[ 17.145481][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 17.145484][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 17.145489][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 17.145493][ 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:2366) 
[ 17.145498][ C3] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 17.145501][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 17.145504][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 17.145508][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 17.145513][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.145516][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 17.145519][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 17.145521][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.145524][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.145528][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 17.145531][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.145534][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 17.145538][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 17.145544][ C3] __put_net (net/core/net_namespace.c:732) 
[ 17.145547][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 17.145551][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 17.145554][ C3] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 17.145557][ C3] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 17.145562][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 17.145566][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 17.145570][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 17.145574][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 17.145578][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 17.145582][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 17.145587][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 17.145589][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 17.145592][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   17.145595][    C3]  </IRQ>
[   17.145597][    C3]  <TASK>
[ 17.145598][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.145601][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 17.145605][ C3] 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
[   17.145608][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000242
[   17.145611][    C3] RAX: 00000000000484f7 RBX: 1ffff9200002afc1 RCX: ffffffff97b5ba19
[   17.145616][    C3] RDX: 0000000000000000 RSI: ffffffff98687785 RDI: ffffffff97e51260
[   17.145618][    C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c3667a
[   17.145620][    C3] R10: ffff8880361b33d3 R11: 0000000000000000 R12: 0000000000000000
[   17.145621][    C3] R13: ffff888001bf4640 R14: dffffc0000000000 R15: 0000000000000000
[ 17.145625][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 17.145630][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 17.145632][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.145635][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.145639][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 17.145643][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 17.145648][ C3] do_idle (kernel/sched/idle.c:325) 
[ 17.145652][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.145656][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 17.145659][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 17.145665][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   19.690131][    C2] INFO: lockdep is turned off.
| [   19.690321][    C2] Preemption disabled at:
| [ 19.690322][ 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) 
| [   19.690774][    C2] Tainted: [W]=WARN
[   19.690775][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   19.690778][    C2] Call Trace:
[   19.690780][    C2]  <IRQ>
[ 19.690782][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 19.690791][ C2] __might_resched (kernel/sched/core.c:8819) 
[ 19.690799][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 19.690805][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 19.690808][ C2] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 19.690814][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 19.690822][ 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) 
[ 19.690827][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 19.690830][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 19.690836][ 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) 
[ 19.690841][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 19.690844][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 19.690850][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 19.690853][ 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) 
[ 19.690860][ C2] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 19.690865][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 19.690868][ C2] ? __local_bh_enable_ip (kernel/softirq.c:407) 
[ 19.690873][ C2] ? copy_fpstate_to_sigframe (arch/x86/kernel/fpu/signal.c:231) 
[ 19.690877][ C2] ? get_sigframe (arch/x86/kernel/signal.c:163) 
[ 19.690883][ 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) 
[ 19.690886][ C2] ? handle_signal (arch/x86/kernel/signal.c:250 arch/x86/kernel/signal.c:294) 
[ 19.690889][ C2] ? arch_do_signal_or_restart (arch/x86/kernel/signal.c:340) 
[ 19.690892][ 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) 
[ 19.690898][ C2] ? do_syscall_64 (arch/x86/entry/syscall_64.c:113) 
[ 19.690900][ C2] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 19.690905][ C2] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 19.690910][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 19.690915][ C2] __put_net (net/core/net_namespace.c:732) 
[ 19.690919][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 19.690923][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 19.690926][ C2] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 19.690930][ 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) 
[ 19.690934][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 19.690938][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 19.690942][ C2] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 19.690949][ C2] rcu_core (kernel/rcu/tree.c:2826) 
[ 19.690953][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 19.690957][ 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) 
[ 19.690961][ C2] do_softirq (kernel/softirq.c:480 kernel/softirq.c:467) 
[   19.690964][    C2]  </IRQ>
[   19.690965][    C2]  <TASK>
[ 19.690967][ C2] __local_bh_enable_ip (kernel/softirq.c:407) 
[ 19.690969][ C2] copy_fpstate_to_sigframe (arch/x86/kernel/fpu/signal.c:231) 
[ 19.690975][ C2] get_sigframe (arch/x86/kernel/signal.c:163) 
[ 19.690978][ C2] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 19.690982][ C2] ? __pfx_get_sigframe (arch/x86/kernel/signal.c:96) 
[ 19.690986][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 19.690989][ C2] ? trace_rseq_update (./include/trace/events/rseq.h:11 (discriminator 21)) 
[ 19.690998][ 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) 
[ 19.691002][ C2] ? __pfx___rseq_handle_notify_resume (kernel/rseq.c:425) 
[ 19.691007][ C2] ? __pfx_x64_setup_rt_frame (arch/x86/kernel/signal_64.c:165) 
[ 19.691010][ C2] ? __pfx___schedule (kernel/sched/core.c:6646) 
[ 19.691017][ C2] handle_signal (arch/x86/kernel/signal.c:250 arch/x86/kernel/signal.c:294) 
[ 19.691020][ C2] arch_do_signal_or_restart (arch/x86/kernel/signal.c:340) 
[ 19.691024][ C2] ? __pfx_arch_do_signal_or_restart (arch/x86/kernel/signal.c:334) 
[ 19.691029][ C2] ? __x64_sys_rt_sigsuspend (kernel/signal.c:4858 kernel/signal.c:4848 kernel/signal.c:4848) 
[ 19.691035][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 19.691040][ 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) 
[ 19.691044][ C2] do_syscall_64 (arch/x86/entry/syscall_64.c:113) 
[ 19.691047][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   19.691050][    C2] RIP: 0033:0x7f2af257c06c
[ 19.691058][ C2] Code: Unable to access opcode bytes at 0x7f2af257c042.

Code starting with the faulting instruction
===========================================
[   19.691060][    C2] RSP: 002b:00007ffe2b0747e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000082
[   19.691064][    C2] RAX: fffffffffffffffc RBX: 00007ffe2b074828 RCX: 00007f2af257c06c
[   19.691066][    C2] RDX: 0000000000000001 RSI: 0000000000000008 RDI: 00007ffe2b074850
[   19.691068][    C2] RBP: 00007ffe2b0748d0 R08: 00007ffe2b0748d0 R09: 0000000000000000
[   19.691070][    C2] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe2b074850


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