======================================
| [   18.106438][    C2] 1 lock held by packetdrill/227:
| [ 18.106653][ C2] #0: ffffffffae3749c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) 
| [   18.107040][    C2]
| [   18.107040][    C2] stack backtrace:
[   18.107306][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   18.107309][    C2] Call Trace:
[   18.107310][    C2]  <IRQ>
[ 18.107312][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 18.107318][ C2] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) 
[ 18.107323][ C2] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) 
[ 18.107328][ C2] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 18.107334][ C2] ? save_trace (kernel/locking/lockdep.c:594) 
[ 18.107339][ C2] mark_lock (kernel/locking/lockdep.c:4754) 
[ 18.107343][ C2] mark_usage (kernel/locking/lockdep.c:4643) 
[ 18.107347][ C2] __lock_acquire (kernel/locking/lockdep.c:5189) 
[ 18.107352][ C2] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 18.107355][ C2] ? simple_pin_fs (fs/libfs.c:1066) 
[ 18.107358][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 18.107364][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 18.107367][ C2] ? simple_pin_fs (fs/libfs.c:1066) 
[ 18.107373][ C2] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 18.107378][ C2] ? simple_pin_fs (fs/libfs.c:1066) 
[ 18.107382][ C2] simple_pin_fs (fs/libfs.c:1066) 
[ 18.107387][ C2] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 18.107393][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 18.107398][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 18.107401][ 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) 
[ 18.107406][ C2] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 18.107409][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 18.107412][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 18.107415][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 18.107419][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 18.107423][ C2] ? _raw_write_unlock_irq (./include/linux/rwlock_api_smp.h:274 kernel/locking/spinlock.c:358) 
[ 18.107427][ C2] ? exit_notify (kernel/exit.c:788) 
[ 18.107430][ C2] ? do_exit (kernel/exit.c:974) 
[ 18.107433][ C2] ? do_group_exit (kernel/exit.c:1083) 
[ 18.107435][ C2] ? __x64_sys_exit_group (kernel/exit.c:1111) 
[ 18.107438][ C2] ? x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 18.107441][ C2] ? do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 18.107444][ C2] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 18.107449][ C2] __put_net (net/core/net_namespace.c:732) 
[ 18.107452][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 18.107456][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 18.107459][ C2] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 18.107464][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 18.107468][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 18.107472][ C2] ? note_gp_changes (kernel/rcu/tree.c:1324 (discriminator 1)) 
[ 18.107476][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 18.107481][ C2] rcu_core (kernel/rcu/tree.c:2826) 
[ 18.107484][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 18.107489][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 18.107491][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 18.107493][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   18.107497][    C2]  </IRQ>
[   18.107498][    C2]  <TASK>
[ 18.107499][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 18.107502][ C2] RIP: 0010:_raw_write_unlock_irq (./include/linux/rwlock_api_smp.h:274 kernel/locking/spinlock.c:358) 
[ 18.107506][ C2] Code: 0f 1f 44 00 00 55 48 8b 74 24 08 48 89 fd 48 83 c7 18 e8 d5 eb 85 fd 48 89 ef e8 8d 48 86 fd e8 f8 9a ab fd fb bf 01 00 00 00 <e8> 7d 46 7a fd 65 8b 05 26 e0 98 02 85 c0 74 06 5d e9 8c 2c 00 00
All code
========
   0:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
   5:	55                   	push   %rbp
   6:	48 8b 74 24 08       	mov    0x8(%rsp),%rsi
   b:	48 89 fd             	mov    %rdi,%rbp
   e:	48 83 c7 18          	add    $0x18,%rdi
  12:	e8 d5 eb 85 fd       	call   0xfffffffffd85ebec
  17:	48 89 ef             	mov    %rbp,%rdi
  1a:	e8 8d 48 86 fd       	call   0xfffffffffd8648ac
  1f:	e8 f8 9a ab fd       	call   0xfffffffffdab9b1c
  24:	fb                   	sti
  25:	bf 01 00 00 00       	mov    $0x1,%edi
  2a:*	e8 7d 46 7a fd       	call   0xfffffffffd7a46ac		<-- trapping instruction
  2f:	65 8b 05 26 e0 98 02 	mov    %gs:0x298e026(%rip),%eax        # 0x298e05c
  36:	85 c0                	test   %eax,%eax
  38:	74 06                	je     0x40
  3a:	5d                   	pop    %rbp
  3b:	e9 8c 2c 00 00       	jmp    0x2ccc

Code starting with the faulting instruction
===========================================
   0:	e8 7d 46 7a fd       	call   0xfffffffffd7a4682
   5:	65 8b 05 26 e0 98 02 	mov    %gs:0x298e026(%rip),%eax        # 0x298e032
   c:	85 c0                	test   %eax,%eax
   e:	74 06                	je     0x16
  10:	5d                   	pop    %rbp
  11:	e9 8c 2c 00 00       	jmp    0x2ca2
[   18.107509][    C2] RSP: 0018:ffffc90000a47de8 EFLAGS: 00000206
[   18.107512][    C2] RAX: 000000000016d64b RBX: ffff888009167300 RCX: ffffffffaae369df
[   18.107515][    C2] RDX: 0000000000000000 RSI: ffffffffade87785 RDI: 0000000000000001
[   18.107516][    C2] RBP: ffffffffae00c080 R08: 0000000000000001 R09: 0000000000000001
[   18.107518][    C2] R10: ffffffffaedda697 R11: ffffffffae374ae0 R12: ffff888009167310
[   18.107520][    C2] R13: ffff888009df0570 R14: ffffc90000a47e30 R15: 1ffff92000148fc2
[ 18.107524][ C2] ? trace_irq_enable.constprop.0 (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 ./include/linux/cpumask.h:587 ./include/linux/cpumask.h:1143 ./include/trace/events/preemptirq.h:40) 
[ 18.107530][ C2] ? _raw_write_unlock_irq (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 ./include/linux/rwlock_api_smp.h:273 kernel/locking/spinlock.c:358) 
[ 18.107533][ C2] exit_notify (kernel/exit.c:788) 
[ 18.107537][ C2] ? __pfx_exit_notify (kernel/exit.c:750) 
[ 18.107540][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 18.107544][ C2] ? exit_tasks_rcu_start (./arch/x86/include/asm/preempt.h:104 (discriminator 31) kernel/rcu/tasks.h:1306 (discriminator 31)) 
[ 18.107548][ C2] do_exit (kernel/exit.c:974) 
[ 18.107551][ C2] ? _raw_spin_unlock_irq (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 ./include/linux/spinlock_api_smp.h:159 kernel/locking/spinlock.c:202) 
[ 18.107555][ C2] do_group_exit (kernel/exit.c:1083) 
[ 18.107559][ C2] __x64_sys_exit_group (kernel/exit.c:1111) 
[ 18.107562][ C2] x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 18.107565][ C2] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 18.107568][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   18.107570][    C2] RIP: 0033:0x48991d
[ 18.107574][ C2] Code: Unable to access opcode bytes at 0x4898f3.

Code starting with the faulting instruction
===========================================
[   18.107575][    C2] RSP: 002b:00007ffe38bff2b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   18.107578][    C2] RAX: ffffffffffffffda RBX: 00000000005564b0 RCX: 000000000048991d
[   18.107580][    C2] RDX: 00000000000000e7 RSI: ffffffffffffffa8 RDI: 0000000000000000
[   18.107581][    C2] RBP: 0000000000000000 R08: 0000000036920620 R09: 0000000000000000
[   18.107583][    C2] R10: 0000000000000400 R11: 0000000000000246 R12: 00000000005564b0
[   18.107585][    C2] R13: 0000000000000000 R14: 0000000000556f60 R15: 000000000042d8e0
| [   18.129613][    C2] RCU nest depth: 0, expected: 0
| [   18.129838][    C2] INFO: lockdep is turned off.
| [   18.130315][    C2] Preemption disabled at:
| [ 18.130317][ C2] 0x0 
[   18.130743][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   18.130745][    C2] Call Trace:
[   18.130747][    C2]  <IRQ>
[ 18.130748][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 18.130756][ C2] __might_resched (kernel/sched/core.c:8819) 
[ 18.130763][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 18.130767][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 18.130771][ C2] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 18.130775][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 18.130782][ 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) 
[ 18.130787][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 18.130789][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 18.130794][ 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) 
[ 18.130798][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 18.130802][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 18.130807][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 18.130810][ 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) 
[ 18.130815][ C2] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 18.130819][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 18.130822][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 18.130826][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 18.130830][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 18.130834][ C2] ? _raw_write_unlock_irq (./include/linux/rwlock_api_smp.h:274 kernel/locking/spinlock.c:358) 
[ 18.130838][ C2] ? exit_notify (kernel/exit.c:788) 
[ 18.130842][ C2] ? do_exit (kernel/exit.c:974) 
[ 18.130844][ C2] ? do_group_exit (kernel/exit.c:1083) 
[ 18.130847][ C2] ? __x64_sys_exit_group (kernel/exit.c:1111) 
[ 18.130850][ C2] ? x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 18.130856][ C2] ? do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 18.130858][ C2] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 18.130863][ C2] __put_net (net/core/net_namespace.c:732) 
[ 18.130866][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 18.130870][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 18.130873][ C2] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 18.130878][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 18.130882][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 18.130886][ C2] ? note_gp_changes (kernel/rcu/tree.c:1324 (discriminator 1)) 
[ 18.130890][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 18.130894][ C2] rcu_core (kernel/rcu/tree.c:2826) 
[ 18.130898][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 18.130902][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 18.130905][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 18.130907][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   18.130911][    C2]  </IRQ>
[   18.130912][    C2]  <TASK>
[ 18.130914][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 18.130916][ C2] RIP: 0010:_raw_write_unlock_irq (./include/linux/rwlock_api_smp.h:274 kernel/locking/spinlock.c:358) 
[ 18.130921][ C2] Code: 0f 1f 44 00 00 55 48 8b 74 24 08 48 89 fd 48 83 c7 18 e8 d5 eb 85 fd 48 89 ef e8 8d 48 86 fd e8 f8 9a ab fd fb bf 01 00 00 00 <e8> 7d 46 7a fd 65 8b 05 26 e0 98 02 85 c0 74 06 5d e9 8c 2c 00 00
All code
========
   0:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
   5:	55                   	push   %rbp
   6:	48 8b 74 24 08       	mov    0x8(%rsp),%rsi
   b:	48 89 fd             	mov    %rdi,%rbp
   e:	48 83 c7 18          	add    $0x18,%rdi
  12:	e8 d5 eb 85 fd       	call   0xfffffffffd85ebec
  17:	48 89 ef             	mov    %rbp,%rdi
  1a:	e8 8d 48 86 fd       	call   0xfffffffffd8648ac
  1f:	e8 f8 9a ab fd       	call   0xfffffffffdab9b1c
  24:	fb                   	sti
  25:	bf 01 00 00 00       	mov    $0x1,%edi
  2a:*	e8 7d 46 7a fd       	call   0xfffffffffd7a46ac		<-- trapping instruction
  2f:	65 8b 05 26 e0 98 02 	mov    %gs:0x298e026(%rip),%eax        # 0x298e05c
  36:	85 c0                	test   %eax,%eax
  38:	74 06                	je     0x40
  3a:	5d                   	pop    %rbp
  3b:	e9 8c 2c 00 00       	jmp    0x2ccc

Code starting with the faulting instruction
===========================================
   0:	e8 7d 46 7a fd       	call   0xfffffffffd7a4682
   5:	65 8b 05 26 e0 98 02 	mov    %gs:0x298e026(%rip),%eax        # 0x298e032
   c:	85 c0                	test   %eax,%eax
   e:	74 06                	je     0x16
  10:	5d                   	pop    %rbp
  11:	e9 8c 2c 00 00       	jmp    0x2ca2
[   18.130923][    C2] RSP: 0018:ffffc90000a47de8 EFLAGS: 00000206
[   18.130927][    C2] RAX: 000000000016d64b RBX: ffff888009167300 RCX: ffffffffaae369df
[   18.130929][    C2] RDX: 0000000000000000 RSI: ffffffffade87785 RDI: 0000000000000001
[   18.130931][    C2] RBP: ffffffffae00c080 R08: 0000000000000001 R09: 0000000000000001
[   18.130932][    C2] R10: ffffffffaedda697 R11: ffffffffae374ae0 R12: ffff888009167310
[   18.130935][    C2] R13: ffff888009df0570 R14: ffffc90000a47e30 R15: 1ffff92000148fc2
[ 18.130938][ C2] ? trace_irq_enable.constprop.0 (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 ./include/linux/cpumask.h:587 ./include/linux/cpumask.h:1143 ./include/trace/events/preemptirq.h:40) 
[ 18.130945][ C2] ? _raw_write_unlock_irq (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 ./include/linux/rwlock_api_smp.h:273 kernel/locking/spinlock.c:358) 
[ 18.130948][ C2] exit_notify (kernel/exit.c:788) 
[ 18.130952][ C2] ? __pfx_exit_notify (kernel/exit.c:750) 
[ 18.130955][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 18.130959][ C2] ? exit_tasks_rcu_start (./arch/x86/include/asm/preempt.h:104 (discriminator 31) kernel/rcu/tasks.h:1306 (discriminator 31)) 
[ 18.130963][ C2] do_exit (kernel/exit.c:974) 
[ 18.130966][ C2] ? _raw_spin_unlock_irq (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 ./include/linux/spinlock_api_smp.h:159 kernel/locking/spinlock.c:202) 
[ 18.130970][ C2] do_group_exit (kernel/exit.c:1083) 
[ 18.130974][ C2] __x64_sys_exit_group (kernel/exit.c:1111) 
[ 18.130977][ C2] x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 18.130980][ C2] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 18.130983][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   18.130985][    C2] RIP: 0033:0x48991d
[ 18.130988][ C2] Code: Unable to access opcode bytes at 0x4898f3.

Code starting with the faulting instruction
===========================================
[   18.130989][    C2] RSP: 002b:00007ffe38bff2b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   18.130992][    C2] RAX: ffffffffffffffda RBX: 00000000005564b0 RCX: 000000000048991d
[   18.130994][    C2] RDX: 00000000000000e7 RSI: ffffffffffffffa8 RDI: 0000000000000000
[   18.130996][    C2] RBP: 0000000000000000 R08: 0000000036920620 R09: 0000000000000000
[   18.130998][    C2] R10: 0000000000000400 R11: 0000000000000246 R12: 00000000005564b0
[   18.131000][    C2] R13: 0000000000000000 R14: 0000000000556f60 R15: 000000000042d8e0
| [   20.782162][    C0] INFO: lockdep is turned off.
| [   20.782380][    C0] Preemption disabled at:
| [ 20.782382][ C0] schedule_preempt_disabled (kernel/sched/core.c:6919) 
| [   20.782914][    C0] Tainted: [W]=WARN
[   20.782916][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   20.782918][    C0] Call Trace:
[   20.782920][    C0]  <IRQ>
[ 20.782922][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 20.782928][ C0] __might_resched (kernel/sched/core.c:8819) 
[ 20.782934][ C0] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 20.782938][ C0] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 20.782941][ C0] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 20.782946][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 20.782953][ 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) 
[ 20.782958][ C0] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 20.782961][ C0] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 20.782965][ 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) 
[ 20.782970][ C0] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 20.782973][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 20.782978][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 20.782981][ 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) 
[ 20.782986][ C0] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 20.782990][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 20.782993][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 20.782998][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 20.783002][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 20.783006][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 20.783009][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 20.783011][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 20.783014][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 20.783018][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 20.783021][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 20.783024][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 20.783027][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 20.783032][ C0] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 20.783037][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 20.783042][ C0] __put_net (net/core/net_namespace.c:732) 
[ 20.783045][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 20.783049][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 20.783052][ C0] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 20.783057][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 20.783061][ C0] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 20.783066][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 20.783071][ C0] rcu_core (kernel/rcu/tree.c:2826) 
[ 20.783076][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 20.783080][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 20.783083][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 20.783085][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   20.783089][    C0]  </IRQ>
[   20.783090][    C0]  <TASK>
[ 20.783092][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 20.783094][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 20.783099][ 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
[   20.783102][    C0] RSP: 0018:ffffffffae007df8 EFLAGS: 00000246
[   20.783106][    C0] RAX: 0000000000000000 RBX: 1ffffffff5c00fc3 RCX: ffffffffad35ba19
[   20.783108][    C0] RDX: ffffed1006c0667b RSI: ffffffffad6511e0 RDI: ffffffffaab8633f
[   20.783110][    C0] RBP: 0000000000000000 R08: 0000000000000000 R09: ffffed1006c0667a
[   20.783111][    C0] R10: ffff8880360333d3 R11: ffff888008978558 R12: 0000000000000000
[   20.783114][    C0] R13: ffffffffae01f240 R14: dffffc0000000000 R15: 0000000000014770
[ 20.783118][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 20.783121][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 20.783125][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 20.783128][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 20.783130][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 20.783134][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 20.783138][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 20.783144][ C0] do_idle (kernel/sched/idle.c:325) 
[ 20.783148][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 20.783152][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 20.783155][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 20.783159][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:501) 
[ 20.783164][ C0] x86_64_start_kernel (arch/x86/kernel/head64.c:443 (discriminator 17)) 


Finger prints:
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
schedule_preempt_disabled:dump_stack_lvl:__might_resched:down_write:simple_recursive_removal