======================================
| [   15.976582][    C2] 1 lock held by ksft_runner.sh/258:
| [ 15.976798][ C2] #0: ffffffff913774c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2570) 
| [   15.977169][    C2]
| [   15.977169][    C2] stack backtrace:
[   15.977432][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.977434][    C2] Call Trace:
[   15.977436][    C2]  <IRQ>
[ 15.977438][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.977444][ C2] print_usage_bug.part.0 (kernel/locking/lockdep.c:4048) 
[ 15.977449][ C2] mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4059 kernel/locking/lockdep.c:4270) 
[ 15.977453][ C2] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 15.977458][ C2] ? save_trace (kernel/locking/lockdep.c:595) 
[ 15.977463][ C2] mark_lock (kernel/locking/lockdep.c:4756) 
[ 15.977467][ C2] mark_usage (kernel/locking/lockdep.c:4645) 
[ 15.977470][ C2] __lock_acquire (kernel/locking/lockdep.c:5194) 
[ 15.977473][ C2] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 15.977477][ C2] lock_acquire.part.0 (kernel/locking/lockdep.c:473 kernel/locking/lockdep.c:5873) 
[ 15.977481][ C2] ? simple_pin_fs (fs/libfs.c:1067) 
[ 15.977485][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 15.977489][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 15.977492][ C2] ? simple_pin_fs (fs/libfs.c:1067) 
[ 15.977496][ C2] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 15.977500][ C2] ? simple_pin_fs (fs/libfs.c:1067) 
[ 15.977503][ C2] simple_pin_fs (fs/libfs.c:1067) 
[ 15.977507][ C2] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 15.977510][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:411 lib/ref_tracker.c:195) 
[ 15.977517][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 15.977520][ 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) 
[ 15.977525][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.977528][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 15.977531][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.977534][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 15.977539][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.977543][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.977546][ C2] ? get_partial_node.part.0 (mm/slub.c:2902) 
[ 15.977551][ C2] ? ___slab_alloc (mm/slub.c:2863 mm/slub.c:2980 mm/slub.c:3838) 
[ 15.977553][ C2] ? __slab_alloc.constprop.0 (mm/slub.c:3948) 
[ 15.977556][ C2] ? kmem_cache_alloc_noprof (mm/slub.c:4023 mm/slub.c:4184 mm/slub.c:4203) 
[ 15.977560][ C2] ? getname_flags (fs/namei.c:146) 
[ 15.977562][ C2] ? do_sys_openat2 (./include/linux/fs.h:2879 fs/open.c:1431) 
[ 15.977566][ C2] ? __x64_sys_openat (fs/open.c:1463) 
[ 15.977571][ C2] __put_net (net/core/net_namespace.c:732) 
[ 15.977575][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 15.977579][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.977582][ C2] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.977585][ C2] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 15.977589][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 15.977593][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 15.977596][ C2] ? note_gp_changes (kernel/rcu/tree.c:1326 (discriminator 1)) 
[ 15.977599][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 15.977603][ C2] rcu_core (kernel/rcu/tree.c:2834) 
[ 15.977607][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 15.977612][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.977615][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.977617][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   15.977621][    C2]  </IRQ>
[   15.977622][    C2]  <TASK>
[ 15.977624][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.977626][ C2] RIP: 0010:_raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.977631][ C2] Code: 74 24 10 e8 c1 2e 83 fd 48 89 ef e8 79 81 83 fd 81 e3 00 02 00 00 75 29 9c 58 f6 c4 02 75 35 48 85 db 74 01 fb bf 01 00 00 00 <e8> fa 7e 77 fd 65 8b 05 13 7d 97 02 85 c0 74 0e 5b 5d c3 cc cc cc
All code
========
   0:	74 24                	je     0x26
   2:	10 e8                	adc    %ch,%al
   4:	c1 2e 83             	shrl   $0x83,(%rsi)
   7:	fd                   	std
   8:	48 89 ef             	mov    %rbp,%rdi
   b:	e8 79 81 83 fd       	call   0xfffffffffd838189
  10:	81 e3 00 02 00 00    	and    $0x200,%ebx
  16:	75 29                	jne    0x41
  18:	9c                   	pushf
  19:	58                   	pop    %rax
  1a:	f6 c4 02             	test   $0x2,%ah
  1d:	75 35                	jne    0x54
  1f:	48 85 db             	test   %rbx,%rbx
  22:	74 01                	je     0x25
  24:	fb                   	sti
  25:	bf 01 00 00 00       	mov    $0x1,%edi
  2a:*	e8 fa 7e 77 fd       	call   0xfffffffffd777f29		<-- trapping instruction
  2f:	65 8b 05 13 7d 97 02 	mov    %gs:0x2977d13(%rip),%eax        # 0x2977d49
  36:	85 c0                	test   %eax,%eax
  38:	74 0e                	je     0x48
  3a:	5b                   	pop    %rbx
  3b:	5d                   	pop    %rbp
  3c:	c3                   	ret
  3d:	cc                   	int3
  3e:	cc                   	int3
  3f:	cc                   	int3

Code starting with the faulting instruction
===========================================
   0:	e8 fa 7e 77 fd       	call   0xfffffffffd777eff
   5:	65 8b 05 13 7d 97 02 	mov    %gs:0x2977d13(%rip),%eax        # 0x2977d1f
   c:	85 c0                	test   %eax,%eax
   e:	74 0e                	je     0x1e
  10:	5b                   	pop    %rbx
  11:	5d                   	pop    %rbp
  12:	c3                   	ret
  13:	cc                   	int3
  14:	cc                   	int3
  15:	cc                   	int3
[   15.977634][    C2] RSP: 0018:ffffc90000ab7bd8 EFLAGS: 00000206
[   15.977637][    C2] RAX: 0000000000000002 RBX: 0000000000000200 RCX: ffffffff8de43b9f
[   15.977639][    C2] RDX: 0000000000000000 RSI: ffffffff90e8f4e4 RDI: 0000000000000001
[   15.977641][    C2] RBP: ffff888001948040 R08: 0000000000000001 R09: 0000000000000001
[   15.977642][    C2] R10: ffffffff91de68d7 R11: ffff888001948058 R12: ffff888001948040
[   15.977644][    C2] R13: ffffea000046f400 R14: ffff888001943240 R15: ffff888011bd2340
[ 15.977648][ 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:654 ./include/linux/cpumask.h:1210 ./include/trace/events/preemptirq.h:40) 
[ 15.977657][ C2] get_partial_node.part.0 (mm/slub.c:2902) 
[ 15.977662][ C2] ___slab_alloc (mm/slub.c:2863 mm/slub.c:2980 mm/slub.c:3838) 
[ 15.977665][ C2] ? getname_flags (fs/namei.c:146) 
[ 15.977669][ C2] ? getname_flags (fs/namei.c:146) 
[ 15.977672][ C2] __slab_alloc.constprop.0 (mm/slub.c:3948) 
[ 15.977676][ C2] ? getname_flags (fs/namei.c:146) 
[ 15.977678][ C2] kmem_cache_alloc_noprof (mm/slub.c:4023 mm/slub.c:4184 mm/slub.c:4203) 
[ 15.977683][ C2] getname_flags (fs/namei.c:146) 
[ 15.977687][ C2] do_sys_openat2 (./include/linux/fs.h:2879 fs/open.c:1431) 
[ 15.977690][ C2] ? __pfx_do_sys_openat2 (fs/open.c:1422) 
[ 15.977695][ C2] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 15.977700][ C2] __x64_sys_openat (fs/open.c:1463) 
[ 15.977703][ C2] ? exc_page_fault (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:151 arch/x86/mm/fault.c:1484 arch/x86/mm/fault.c:1532) 
[ 15.977707][ C2] ? __pfx___x64_sys_openat (fs/open.c:1463) 
[ 15.977711][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 15.977714][ C2] ? do_syscall_64 (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 ./include/linux/entry-common.h:199 arch/x86/entry/syscall_64.c:90) 
[ 15.977718][ C2] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 15.977721][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   15.977724][    C2] RIP: 0033:0x7f5090d9582b
[ 15.977727][ C2] Code: 25 00 00 41 00 3d 00 00 41 00 74 4b 64 8b 04 25 18 00 00 00 85 c0 75 67 44 89 e2 48 89 ee bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 91 00 00 00 48 8b 54 24 28 64 48 2b 14 25
All code
========
   0:	25 00 00 41 00       	and    $0x410000,%eax
   5:	3d 00 00 41 00       	cmp    $0x410000,%eax
   a:	74 4b                	je     0x57
   c:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  13:	00 
  14:	85 c0                	test   %eax,%eax
  16:	75 67                	jne    0x7f
  18:	44 89 e2             	mov    %r12d,%edx
  1b:	48 89 ee             	mov    %rbp,%rsi
  1e:	bf 9c ff ff ff       	mov    $0xffffff9c,%edi
  23:	b8 01 01 00 00       	mov    $0x101,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	0f 87 91 00 00 00    	ja     0xc7
  36:	48 8b 54 24 28       	mov    0x28(%rsp),%rdx
  3b:	64                   	fs
  3c:	48                   	rex.W
  3d:	2b                   	.byte 0x2b
  3e:	14 25                	adc    $0x25,%al

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	0f 87 91 00 00 00    	ja     0x9d
   c:	48 8b 54 24 28       	mov    0x28(%rsp),%rdx
  11:	64                   	fs
  12:	48                   	rex.W
  13:	2b                   	.byte 0x2b
  14:	14 25                	adc    $0x25,%al
[   15.977729][    C2] RSP: 002b:00007ffdeed634a0 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
[   15.977732][    C2] RAX: ffffffffffffffda RBX: 0000555dc0344240 RCX: 00007f5090d9582b
[   15.977734][    C2] RDX: 0000000000000241 RSI: 0000555dc0339960 RDI: 00000000ffffff9c
[   15.977736][    C2] RBP: 0000555dc0339960 R08: 0000000000000000 R09: 0000000000000020
[   15.977738][    C2] R10: 00000000000001b6 R11: 0000000000000246 R12: 0000000000000241
[   15.977739][    C2] R13: 0000000000000001 R14: 0000555dc0339960 R15: 00007f5090c546c0
| [   16.000019][    C2] RCU nest depth: 0, expected: 0
| [   16.000238][    C2] INFO: lockdep is turned off.
| [   16.000447][    C2] Preemption disabled at:
| [ 16.000448][ C2] __slab_alloc.constprop.0 (mm/slub.c:3945) 
[   16.000897][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.000899][    C2] Call Trace:
[   16.000901][    C2]  <IRQ>
[ 16.000903][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 16.000909][ C2] __might_resched (kernel/sched/core.c:8796) 
[ 16.000916][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 16.000920][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 16.000923][ C2] ? simple_recursive_removal (fs/libfs.c:614) 
[ 16.000927][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.000932][ 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) 
[ 16.000938][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 16.000941][ 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) 
[ 16.000944][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 16.000950][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 16.000953][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:411 lib/ref_tracker.c:195) 
[ 16.000958][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 16.000962][ 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) 
[ 16.000968][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.000971][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 16.000974][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 16.000979][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 16.000984][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.000988][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 16.000992][ C2] ? get_partial_node.part.0 (mm/slub.c:2902) 
[ 16.000995][ C2] ? ___slab_alloc (mm/slub.c:2863 mm/slub.c:2980 mm/slub.c:3838) 
[ 16.000998][ C2] ? __slab_alloc.constprop.0 (mm/slub.c:3948) 
[ 16.001000][ C2] ? kmem_cache_alloc_noprof (mm/slub.c:4023 mm/slub.c:4184 mm/slub.c:4203) 
[ 16.001004][ C2] ? getname_flags (fs/namei.c:146) 
[ 16.001007][ C2] ? do_sys_openat2 (./include/linux/fs.h:2879 fs/open.c:1431) 
[ 16.001010][ C2] ? __x64_sys_openat (fs/open.c:1463) 
[ 16.001015][ C2] __put_net (net/core/net_namespace.c:732) 
[ 16.001019][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 16.001023][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.001025][ C2] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.001029][ C2] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 16.001035][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 16.001038][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.001041][ C2] ? note_gp_changes (kernel/rcu/tree.c:1326 (discriminator 1)) 
[ 16.001047][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 16.001051][ C2] rcu_core (kernel/rcu/tree.c:2834) 
[ 16.001055][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 16.001060][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 16.001063][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 16.001066][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   16.001069][    C2]  </IRQ>
[   16.001070][    C2]  <TASK>
[ 16.001072][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.001075][ C2] RIP: 0010:_raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 16.001079][ C2] Code: 74 24 10 e8 c1 2e 83 fd 48 89 ef e8 79 81 83 fd 81 e3 00 02 00 00 75 29 9c 58 f6 c4 02 75 35 48 85 db 74 01 fb bf 01 00 00 00 <e8> fa 7e 77 fd 65 8b 05 13 7d 97 02 85 c0 74 0e 5b 5d c3 cc cc cc
All code
========
   0:	74 24                	je     0x26
   2:	10 e8                	adc    %ch,%al
   4:	c1 2e 83             	shrl   $0x83,(%rsi)
   7:	fd                   	std
   8:	48 89 ef             	mov    %rbp,%rdi
   b:	e8 79 81 83 fd       	call   0xfffffffffd838189
  10:	81 e3 00 02 00 00    	and    $0x200,%ebx
  16:	75 29                	jne    0x41
  18:	9c                   	pushf
  19:	58                   	pop    %rax
  1a:	f6 c4 02             	test   $0x2,%ah
  1d:	75 35                	jne    0x54
  1f:	48 85 db             	test   %rbx,%rbx
  22:	74 01                	je     0x25
  24:	fb                   	sti
  25:	bf 01 00 00 00       	mov    $0x1,%edi
  2a:*	e8 fa 7e 77 fd       	call   0xfffffffffd777f29		<-- trapping instruction
  2f:	65 8b 05 13 7d 97 02 	mov    %gs:0x2977d13(%rip),%eax        # 0x2977d49
  36:	85 c0                	test   %eax,%eax
  38:	74 0e                	je     0x48
  3a:	5b                   	pop    %rbx
  3b:	5d                   	pop    %rbp
  3c:	c3                   	ret
  3d:	cc                   	int3
  3e:	cc                   	int3
  3f:	cc                   	int3

Code starting with the faulting instruction
===========================================
   0:	e8 fa 7e 77 fd       	call   0xfffffffffd777eff
   5:	65 8b 05 13 7d 97 02 	mov    %gs:0x2977d13(%rip),%eax        # 0x2977d1f
   c:	85 c0                	test   %eax,%eax
   e:	74 0e                	je     0x1e
  10:	5b                   	pop    %rbx
  11:	5d                   	pop    %rbp
  12:	c3                   	ret
  13:	cc                   	int3
  14:	cc                   	int3
  15:	cc                   	int3
[   16.001082][    C2] RSP: 0018:ffffc90000ab7bd8 EFLAGS: 00000206
[   16.001085][    C2] RAX: 0000000000000002 RBX: 0000000000000200 RCX: ffffffff8de43b9f
[   16.001087][    C2] RDX: 0000000000000000 RSI: ffffffff90e8f4e4 RDI: 0000000000000001
[   16.001089][    C2] RBP: ffff888001948040 R08: 0000000000000001 R09: 0000000000000001
[   16.001090][    C2] R10: ffffffff91de68d7 R11: ffff888001948058 R12: ffff888001948040
[   16.001092][    C2] R13: ffffea000046f400 R14: ffff888001943240 R15: ffff888011bd2340
[ 16.001096][ 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:654 ./include/linux/cpumask.h:1210 ./include/trace/events/preemptirq.h:40) 
[ 16.001104][ C2] get_partial_node.part.0 (mm/slub.c:2902) 
[ 16.001109][ C2] ___slab_alloc (mm/slub.c:2863 mm/slub.c:2980 mm/slub.c:3838) 
[ 16.001113][ C2] ? getname_flags (fs/namei.c:146) 
[ 16.001117][ C2] ? getname_flags (fs/namei.c:146) 
[ 16.001119][ C2] __slab_alloc.constprop.0 (mm/slub.c:3948) 
[ 16.001123][ C2] ? getname_flags (fs/namei.c:146) 
[ 16.001125][ C2] kmem_cache_alloc_noprof (mm/slub.c:4023 mm/slub.c:4184 mm/slub.c:4203) 
[ 16.001130][ C2] getname_flags (fs/namei.c:146) 
[ 16.001134][ C2] do_sys_openat2 (./include/linux/fs.h:2879 fs/open.c:1431) 
[ 16.001138][ C2] ? __pfx_do_sys_openat2 (fs/open.c:1422) 
[ 16.001142][ C2] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 16.001148][ C2] __x64_sys_openat (fs/open.c:1463) 
[ 16.001151][ C2] ? exc_page_fault (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:151 arch/x86/mm/fault.c:1484 arch/x86/mm/fault.c:1532) 
[ 16.001155][ C2] ? __pfx___x64_sys_openat (fs/open.c:1463) 
[ 16.001160][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.001163][ C2] ? do_syscall_64 (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 ./include/linux/entry-common.h:199 arch/x86/entry/syscall_64.c:90) 
[ 16.001166][ C2] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 16.001169][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   16.001172][    C2] RIP: 0033:0x7f5090d9582b
[ 16.001176][ C2] Code: 25 00 00 41 00 3d 00 00 41 00 74 4b 64 8b 04 25 18 00 00 00 85 c0 75 67 44 89 e2 48 89 ee bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 91 00 00 00 48 8b 54 24 28 64 48 2b 14 25
All code
========
   0:	25 00 00 41 00       	and    $0x410000,%eax
   5:	3d 00 00 41 00       	cmp    $0x410000,%eax
   a:	74 4b                	je     0x57
   c:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  13:	00 
  14:	85 c0                	test   %eax,%eax
  16:	75 67                	jne    0x7f
  18:	44 89 e2             	mov    %r12d,%edx
  1b:	48 89 ee             	mov    %rbp,%rsi
  1e:	bf 9c ff ff ff       	mov    $0xffffff9c,%edi
  23:	b8 01 01 00 00       	mov    $0x101,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	0f 87 91 00 00 00    	ja     0xc7
  36:	48 8b 54 24 28       	mov    0x28(%rsp),%rdx
  3b:	64                   	fs
  3c:	48                   	rex.W
  3d:	2b                   	.byte 0x2b
  3e:	14 25                	adc    $0x25,%al

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	0f 87 91 00 00 00    	ja     0x9d
   c:	48 8b 54 24 28       	mov    0x28(%rsp),%rdx
  11:	64                   	fs
  12:	48                   	rex.W
  13:	2b                   	.byte 0x2b
  14:	14 25                	adc    $0x25,%al
[   16.001178][    C2] RSP: 002b:00007ffdeed634a0 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
[   16.001181][    C2] RAX: ffffffffffffffda RBX: 0000555dc0344240 RCX: 00007f5090d9582b
[   16.001183][    C2] RDX: 0000000000000241 RSI: 0000555dc0339960 RDI: 00000000ffffff9c
[   16.001184][    C2] RBP: 0000555dc0339960 R08: 0000000000000000 R09: 0000000000000020
[   16.001186][    C2] R10: 00000000000001b6 R11: 0000000000000246 R12: 0000000000000241
[   16.001188][    C2] R13: 0000000000000001 R14: 0000555dc0339960 R15: 00007f5090c546c0
| [   18.184939][    C2] INFO: lockdep is turned off.
| [   18.185156][    C2] Preemption disabled at:
| [ 18.185158][ C2] 0x0 
| [   18.185540][    C2] Tainted: [W]=WARN
[   18.185541][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   18.185543][    C2] Call Trace:
[   18.185545][    C2]  <IRQ>
[ 18.185547][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 18.185557][ C2] __might_resched (kernel/sched/core.c:8796) 
[ 18.185564][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 18.185568][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 18.185571][ C2] ? simple_recursive_removal (fs/libfs.c:614) 
[ 18.185576][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 18.185581][ 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) 
[ 18.185586][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 18.185589][ 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) 
[ 18.185592][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 18.185598][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 18.185601][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:411 lib/ref_tracker.c:195) 
[ 18.185608][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 18.185611][ 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) 
[ 18.185617][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 18.185620][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 18.185623][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 18.185628][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 18.185633][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 18.185637][ C2] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 18.185640][ C2] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 18.185643][ C2] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 18.185645][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 18.185649][ C2] ? do_idle (kernel/sched/idle.c:325) 
[ 18.185651][ C2] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 18.185653][ C2] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 18.185657][ C2] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 18.185662][ C2] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 18.185666][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 18.185671][ C2] __put_net (net/core/net_namespace.c:732) 
[ 18.185675][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 18.185679][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 18.185681][ C2] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 18.185686][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 18.185690][ C2] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 18.185696][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 18.185701][ C2] rcu_core (kernel/rcu/tree.c:2834) 
[ 18.185706][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 18.185711][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 18.185714][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 18.185717][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   18.185720][    C2]  </IRQ>
[   18.185722][    C2]  <TASK>
[ 18.185723][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 18.185726][ C2] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 18.185731][ C2] 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
[   18.185733][    C2] RSP: 0018:ffffc90000147de8 EFLAGS: 00000246
[   18.185737][    C2] RAX: 0000000000000002 RBX: 1ffff92000028fc1 RCX: ffffffff9038f5d9
[   18.185739][    C2] RDX: ffffed1006c266fb RSI: ffffffff90653b60 RDI: ffffffff8db8d18f
[   18.185741][    C2] RBP: 0000000000000000 R08: 0000000000000000 R09: ffffed1006c266fa
[   18.185742][    C2] R10: ffff8880361337d3 R11: ffff888005298558 R12: 0000000000000000
[   18.185744][    C2] R13: ffff888001bf2300 R14: dffffc0000000000 R15: 0000000000000000
[ 18.185748][ C2] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 18.185751][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 18.185755][ C2] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 18.185757][ C2] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 18.185760][ C2] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 18.185763][ C2] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 18.185767][ C2] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60) 
[ 18.185771][ C2] do_idle (kernel/sched/idle.c:325) 
[ 18.185775][ C2] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 18.185777][ C2] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 18.185780][ C2] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 


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