======================================
| [ 14.864937][ C3] #0: ffffffff8b1745a0 (rcu_read_lock){....}-{1:3}, at: unwind_next_frame (./include/linux/rcupdate.h:331 ./include/linux/rcupdate.h:841 ./include/linux/rcupdate.h:1155 arch/x86/kernel/unwind_orc.c:479) 
| [ 14.865299][ C3] #1: ffffffff8b174480 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) 
| [   14.865650][    C3]
| [   14.865650][    C3] stack backtrace:
[   14.865904][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   14.865906][    C3] Call Trace:
[   14.865908][    C3]  <IRQ>
[ 14.865910][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 14.865916][ C3] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) 
[ 14.865921][ C3] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) 
[ 14.865925][ C3] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 14.865930][ C3] ? save_trace (kernel/locking/lockdep.c:594) 
[ 14.865934][ C3] mark_lock (kernel/locking/lockdep.c:4754) 
[ 14.865938][ C3] mark_usage (kernel/locking/lockdep.c:4643) 
[ 14.865942][ C3] __lock_acquire (kernel/locking/lockdep.c:5189) 
[ 14.865947][ C3] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 14.865951][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 14.865955][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 14.865960][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 14.865963][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 14.865968][ C3] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 14.865971][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 14.865974][ C3] simple_pin_fs (fs/libfs.c:1066) 
[ 14.865978][ C3] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 14.865981][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 14.865986][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 14.865989][ 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:2333) 
[ 14.865995][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.865998][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 14.866001][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 14.866003][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 14.866006][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.866010][ C3] ? unwind_next_frame (arch/x86/kernel/unwind_orc.c:505) 
[ 14.866013][ C3] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 14.866016][ C3] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 14.866020][ C3] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 14.866025][ C3] ? kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 14.866028][ C3] ? __kasan_slab_alloc (mm/kasan/common.c:348) 
[ 14.866031][ C3] ? kmem_cache_alloc_noprof (./include/linux/kasan.h:250 mm/slub.c:4147 mm/slub.c:4196 mm/slub.c:4203) 
[ 14.866036][ C3] ? getname_flags (fs/namei.c:146) 
[ 14.866041][ C3] __put_net (net/core/net_namespace.c:732) 
[ 14.866044][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 14.866048][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.866051][ C3] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.866056][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 14.866060][ C3] ? note_gp_changes (kernel/rcu/tree.c:1324 (discriminator 1)) 
[ 14.866063][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 14.866068][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 14.866071][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 14.866075][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 14.866078][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 14.866080][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   14.866084][    C3]  </IRQ>
[   14.866085][    C3]  <TASK>
[ 14.866086][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.866089][ C3] RIP: 0010:unwind_next_frame (arch/x86/kernel/unwind_orc.c:505) 
[ 14.866093][ C3] Code: 4c 8b 4c 24 20 48 85 c0 49 89 c6 0f 84 a8 02 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8d 7e 05 4c 89 fa 48 c1 ea 03 0f b6 04 02 <4c> 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 a8 06 00 00 41 0f b6 46
All code
========
   0:	4c 8b 4c 24 20       	mov    0x20(%rsp),%r9
   5:	48 85 c0             	test   %rax,%rax
   8:	49 89 c6             	mov    %rax,%r14
   b:	0f 84 a8 02 00 00    	je     0x2b9
  11:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  18:	fc ff df 
  1b:	4d 8d 7e 05          	lea    0x5(%r14),%r15
  1f:	4c 89 fa             	mov    %r15,%rdx
  22:	48 c1 ea 03          	shr    $0x3,%rdx
  26:	0f b6 04 02          	movzbl (%rdx,%rax,1),%eax
  2a:*	4c 89 fa             	mov    %r15,%rdx		<-- trapping instruction
  2d:	83 e2 07             	and    $0x7,%edx
  30:	38 d0                	cmp    %dl,%al
  32:	7f 08                	jg     0x3c
  34:	84 c0                	test   %al,%al
  36:	0f 85 a8 06 00 00    	jne    0x6e4
  3c:	41                   	rex.B
  3d:	0f                   	.byte 0xf
  3e:	b6 46                	mov    $0x46,%dh

Code starting with the faulting instruction
===========================================
   0:	4c 89 fa             	mov    %r15,%rdx
   3:	83 e2 07             	and    $0x7,%edx
   6:	38 d0                	cmp    %dl,%al
   8:	7f 08                	jg     0x12
   a:	84 c0                	test   %al,%al
   c:	0f 85 a8 06 00 00    	jne    0x6ba
  12:	41                   	rex.B
  13:	0f                   	.byte 0xf
  14:	b6 46                	mov    $0x46,%dh
[   14.866096][    C3] RSP: 0018:ffffc90000aa7898 EFLAGS: 00000a07
[   14.866100][    C3] RAX: 0000000000000000 RBX: 1ffff92000154f1c RCX: dffffc0000000000
[   14.866102][    C3] RDX: 1ffffffff1811169 RSI: 0000000000000000 RDI: ffffffff8bd02958
[   14.866104][    C3] RBP: 0000000000000001 R08: 0000000000000000 R09: ffffc90000aa79d9
[   14.866105][    C3] R10: 0000000000000000 R11: 0000000000000000 R12: ffffc90000aa79f0
[   14.866107][    C3] R13: ffffc90000aa7998 R14: ffffffff8c088b4a R15: ffffffff8c088b4f
[ 14.866112][ C3] ? unwind_next_frame (arch/x86/kernel/unwind_orc.c:495) 
[ 14.866116][ C3] ? do_sys_openat2 (./include/linux/fs.h:2852 fs/open.c:1423) 
[ 14.866121][ C3] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 14.866126][ C3] ? do_sys_openat2 (./include/linux/fs.h:2852 fs/open.c:1423) 
[ 14.866129][ C3] ? kernel_text_address (kernel/extable.c:99) 
[ 14.866134][ C3] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 14.866137][ C3] arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 14.866142][ C3] ? do_sys_openat2 (./include/linux/fs.h:2852 fs/open.c:1423) 
[ 14.866146][ C3] stack_trace_save (kernel/stacktrace.c:123) 
[ 14.866149][ C3] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 14.866153][ C3] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 14.866155][ C3] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 14.866159][ C3] kasan_save_stack (mm/kasan/common.c:48) 
[ 14.866162][ C3] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 14.866165][ C3] ? kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 14.866168][ C3] ? __kasan_slab_alloc (mm/kasan/common.c:348) 
[ 14.866170][ C3] ? kmem_cache_alloc_noprof (./include/linux/kasan.h:250 mm/slub.c:4147 mm/slub.c:4196 mm/slub.c:4203) 
[ 14.866174][ C3] ? getname_flags (fs/namei.c:146) 
[ 14.866176][ C3] ? do_sys_openat2 (./include/linux/fs.h:2852 fs/open.c:1423) 
[ 14.866180][ C3] ? rcu_read_lock_any_held (kernel/rcu/update.c:387 kernel/rcu/update.c:380) 
[ 14.866185][ C3] ? stack_depot_save_flags (lib/stackdepot.c:552 lib/stackdepot.c:619) 
[ 14.866189][ C3] ? __lock_release (kernel/locking/lockdep.c:5534) 
[ 14.866193][ C3] ? set_track_prepare (mm/slub.c:939) 
[ 14.866198][ C3] ? kmem_cache_alloc_noprof (mm/slub.c:4023 mm/slub.c:4184 mm/slub.c:4203) 
[ 14.866201][ C3] ? getname_flags (fs/namei.c:146) 
[ 14.866203][ C3] ? do_sys_openat2 (./include/linux/fs.h:2852 fs/open.c:1423) 
[ 14.866205][ C3] ? __x64_sys_openat (fs/open.c:1455) 
[ 14.866208][ C3] ? do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 14.866213][ C3] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 14.866217][ C3] ? set_track_update.isra.0 (mm/slub.c:957) 
[ 14.866219][ C3] ? ___slab_alloc (mm/slub.c:968 mm/slub.c:3848) 
[ 14.866223][ C3] ? getname_flags (fs/namei.c:146) 
[ 14.866227][ C3] kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 14.866230][ C3] __kasan_slab_alloc (mm/kasan/common.c:348) 
[ 14.866234][ C3] kmem_cache_alloc_noprof (./include/linux/kasan.h:250 mm/slub.c:4147 mm/slub.c:4196 mm/slub.c:4203) 
[ 14.866239][ C3] getname_flags (fs/namei.c:146) 
[ 14.866243][ C3] do_sys_openat2 (./include/linux/fs.h:2852 fs/open.c:1423) 
[ 14.866246][ C3] ? __pfx_do_sys_openat2 (fs/open.c:1414) 
[ 14.866250][ C3] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 14.866255][ C3] __x64_sys_openat (fs/open.c:1455) 
[ 14.866258][ C3] ? 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:1488 arch/x86/mm/fault.c:1538) 
[ 14.866261][ C3] ? __pfx___x64_sys_openat (fs/open.c:1455) 
[ 14.866266][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 14.866269][ C3] ? do_syscall_64 (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 ./include/linux/entry-common.h:198 arch/x86/entry/syscall_64.c:90) 
[ 14.866273][ C3] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 14.866277][ C3] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   14.866279][    C3] RIP: 0033:0x7f57f3b5c82b
[ 14.866283][ C3] 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
[   14.866285][    C3] RSP: 002b:00007ffd85a669d0 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
[   14.866288][    C3] RAX: ffffffffffffffda RBX: 0000558df848c690 RCX: 00007f57f3b5c82b
[   14.866290][    C3] RDX: 0000000000000241 RSI: 0000558df848d240 RDI: 00000000ffffff9c
[   14.866291][    C3] RBP: 0000558df848d240 R08: 0000000000000000 R09: 0000000000000020
[   14.866293][    C3] R10: 00000000000001b6 R11: 0000000000000246 R12: 0000000000000241
[   14.866295][    C3] R13: 0000000000000001 R14: 0000558df848d240 R15: 00007f57f3a1b6c0
| [   14.892521][    C3] RCU nest depth: 1, expected: 0
| [   14.892711][    C3] INFO: lockdep is turned off.
| [   14.892901][    C3] Preemption disabled at:
| [ 14.892903][ C3] handle_softirqs (kernel/softirq.c:553) 
[   14.893280][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   14.893281][    C3] Call Trace:
[   14.893283][    C3]  <IRQ>
[ 14.893284][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 14.893289][ C3] __might_resched (kernel/sched/core.c:8819) 
[ 14.893295][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 14.893298][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 14.893301][ C3] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 14.893304][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 14.893309][ 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) 
[ 14.893314][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 14.893316][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 14.893320][ 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) 
[ 14.893324][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 14.893327][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 14.893332][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 14.893335][ 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:2333) 
[ 14.893339][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.893343][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 14.893346][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 14.893348][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 14.893353][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.893356][ C3] ? unwind_next_frame (arch/x86/kernel/unwind_orc.c:505) 
[ 14.893360][ C3] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 14.893363][ C3] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 14.893367][ C3] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 14.893371][ C3] ? kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 14.893374][ C3] ? __kasan_slab_alloc (mm/kasan/common.c:348) 
[ 14.893377][ C3] ? kmem_cache_alloc_noprof (./include/linux/kasan.h:250 mm/slub.c:4147 mm/slub.c:4196 mm/slub.c:4203) 
[ 14.893382][ C3] ? getname_flags (fs/namei.c:146) 
[ 14.893387][ C3] __put_net (net/core/net_namespace.c:732) 
[ 14.893390][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 14.893394][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.893397][ C3] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.893402][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 14.893406][ C3] ? note_gp_changes (kernel/rcu/tree.c:1324 (discriminator 1)) 
[ 14.893409][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 14.893414][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 14.893417][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 14.893422][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 14.893424][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 14.893426][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   14.893430][    C3]  </IRQ>
[   14.893431][    C3]  <TASK>
[ 14.893432][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.893435][ C3] RIP: 0010:unwind_next_frame (arch/x86/kernel/unwind_orc.c:505) 
[ 14.893439][ C3] Code: 4c 8b 4c 24 20 48 85 c0 49 89 c6 0f 84 a8 02 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8d 7e 05 4c 89 fa 48 c1 ea 03 0f b6 04 02 <4c> 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 a8 06 00 00 41 0f b6 46
All code
========
   0:	4c 8b 4c 24 20       	mov    0x20(%rsp),%r9
   5:	48 85 c0             	test   %rax,%rax
   8:	49 89 c6             	mov    %rax,%r14
   b:	0f 84 a8 02 00 00    	je     0x2b9
  11:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  18:	fc ff df 
  1b:	4d 8d 7e 05          	lea    0x5(%r14),%r15
  1f:	4c 89 fa             	mov    %r15,%rdx
  22:	48 c1 ea 03          	shr    $0x3,%rdx
  26:	0f b6 04 02          	movzbl (%rdx,%rax,1),%eax
  2a:*	4c 89 fa             	mov    %r15,%rdx		<-- trapping instruction
  2d:	83 e2 07             	and    $0x7,%edx
  30:	38 d0                	cmp    %dl,%al
  32:	7f 08                	jg     0x3c
  34:	84 c0                	test   %al,%al
  36:	0f 85 a8 06 00 00    	jne    0x6e4
  3c:	41                   	rex.B
  3d:	0f                   	.byte 0xf
  3e:	b6 46                	mov    $0x46,%dh

Code starting with the faulting instruction
===========================================
   0:	4c 89 fa             	mov    %r15,%rdx
   3:	83 e2 07             	and    $0x7,%edx
   6:	38 d0                	cmp    %dl,%al
   8:	7f 08                	jg     0x12
   a:	84 c0                	test   %al,%al
   c:	0f 85 a8 06 00 00    	jne    0x6ba
  12:	41                   	rex.B
  13:	0f                   	.byte 0xf
  14:	b6 46                	mov    $0x46,%dh
[   14.893441][    C3] RSP: 0018:ffffc90000aa7898 EFLAGS: 00000a07
[   14.893444][    C3] RAX: 0000000000000000 RBX: 1ffff92000154f1c RCX: dffffc0000000000
[   14.893446][    C3] RDX: 1ffffffff1811169 RSI: 0000000000000000 RDI: ffffffff8bd02958
[   14.893448][    C3] RBP: 0000000000000001 R08: 0000000000000000 R09: ffffc90000aa79d9
[   14.893449][    C3] R10: 0000000000000000 R11: 0000000000000000 R12: ffffc90000aa79f0
[   14.893451][    C3] R13: ffffc90000aa7998 R14: ffffffff8c088b4a R15: ffffffff8c088b4f
[ 14.893456][ C3] ? unwind_next_frame (arch/x86/kernel/unwind_orc.c:495) 
[ 14.893460][ C3] ? do_sys_openat2 (./include/linux/fs.h:2852 fs/open.c:1423) 
[ 14.893465][ C3] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 14.893470][ C3] ? do_sys_openat2 (./include/linux/fs.h:2852 fs/open.c:1423) 
[ 14.893473][ C3] ? kernel_text_address (kernel/extable.c:99) 
[ 14.893477][ C3] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 14.893481][ C3] arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 14.893486][ C3] ? do_sys_openat2 (./include/linux/fs.h:2852 fs/open.c:1423) 
[ 14.893490][ C3] stack_trace_save (kernel/stacktrace.c:123) 
[ 14.893493][ C3] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 14.893499][ C3] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 14.893502][ C3] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 14.893506][ C3] kasan_save_stack (mm/kasan/common.c:48) 
[ 14.893509][ C3] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 14.893512][ C3] ? kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 14.893515][ C3] ? __kasan_slab_alloc (mm/kasan/common.c:348) 
[ 14.893518][ C3] ? kmem_cache_alloc_noprof (./include/linux/kasan.h:250 mm/slub.c:4147 mm/slub.c:4196 mm/slub.c:4203) 
[ 14.893521][ C3] ? getname_flags (fs/namei.c:146) 
[ 14.893523][ C3] ? do_sys_openat2 (./include/linux/fs.h:2852 fs/open.c:1423) 
[ 14.893527][ C3] ? rcu_read_lock_any_held (kernel/rcu/update.c:387 kernel/rcu/update.c:380) 
[ 14.893531][ C3] ? stack_depot_save_flags (lib/stackdepot.c:552 lib/stackdepot.c:619) 
[ 14.893535][ C3] ? __lock_release (kernel/locking/lockdep.c:5534) 
[ 14.893540][ C3] ? set_track_prepare (mm/slub.c:939) 
[ 14.893544][ C3] ? kmem_cache_alloc_noprof (mm/slub.c:4023 mm/slub.c:4184 mm/slub.c:4203) 
[ 14.893547][ C3] ? getname_flags (fs/namei.c:146) 
[ 14.893549][ C3] ? do_sys_openat2 (./include/linux/fs.h:2852 fs/open.c:1423) 
[ 14.893552][ C3] ? __x64_sys_openat (fs/open.c:1455) 
[ 14.893555][ C3] ? do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 14.893558][ C3] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 14.893562][ C3] ? set_track_update.isra.0 (mm/slub.c:957) 
[ 14.893565][ C3] ? ___slab_alloc (mm/slub.c:968 mm/slub.c:3848) 
[ 14.893568][ C3] ? getname_flags (fs/namei.c:146) 
[ 14.893573][ C3] kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 14.893576][ C3] __kasan_slab_alloc (mm/kasan/common.c:348) 
[ 14.893580][ C3] kmem_cache_alloc_noprof (./include/linux/kasan.h:250 mm/slub.c:4147 mm/slub.c:4196 mm/slub.c:4203) 
[ 14.893585][ C3] getname_flags (fs/namei.c:146) 
[ 14.893588][ C3] do_sys_openat2 (./include/linux/fs.h:2852 fs/open.c:1423) 
[ 14.893591][ C3] ? __pfx_do_sys_openat2 (fs/open.c:1414) 
[ 14.893596][ C3] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 14.893600][ C3] __x64_sys_openat (fs/open.c:1455) 
[ 14.893603][ C3] ? 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:1488 arch/x86/mm/fault.c:1538) 
[ 14.893607][ C3] ? __pfx___x64_sys_openat (fs/open.c:1455) 
[ 14.893611][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 14.893614][ C3] ? do_syscall_64 (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 ./include/linux/entry-common.h:198 arch/x86/entry/syscall_64.c:90) 
[ 14.893618][ C3] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 14.893622][ C3] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   14.893624][    C3] RIP: 0033:0x7f57f3b5c82b
[ 14.893627][ C3] 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
[   14.893629][    C3] RSP: 002b:00007ffd85a669d0 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
[   14.893632][    C3] RAX: ffffffffffffffda RBX: 0000558df848c690 RCX: 00007f57f3b5c82b
[   14.893633][    C3] RDX: 0000000000000241 RSI: 0000558df848d240 RDI: 00000000ffffff9c
[   14.893635][    C3] RBP: 0000558df848d240 R08: 0000000000000000 R09: 0000000000000020
[   14.893637][    C3] R10: 00000000000001b6 R11: 0000000000000246 R12: 0000000000000241
[   14.893638][    C3] R13: 0000000000000001 R14: 0000558df848d240 R15: 00007f57f3a1b6c0
| [   16.584439][    C2] INFO: lockdep is turned off.
| [   16.584652][    C2] Preemption disabled at:
| [ 16.584655][ C2] handle_softirqs (kernel/softirq.c:553) 
| [   16.585077][    C2] Tainted: [W]=WARN
[   16.585079][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.585081][    C2] Call Trace:
[   16.585083][    C2]  <IRQ>
[ 16.585086][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 16.585094][ C2] __might_resched (kernel/sched/core.c:8819) 
[ 16.585101][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 16.585106][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 16.585108][ C2] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 16.585114][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.585122][ 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) 
[ 16.585128][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 16.585130][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 16.585136][ 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) 
[ 16.585140][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 16.585143][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 16.585149][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 16.585152][ 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:2333) 
[ 16.585159][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 16.585164][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 16.585167][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 16.585169][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 16.585175][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.585180][ C2] ? mas_next_slot (lib/maple_tree.c:4666) 
[ 16.585185][ C2] ? mas_find (lib/maple_tree.c:6016) 
[ 16.585188][ C2] ? free_pgtables (mm/memory.c:386) 
[ 16.585195][ C2] ? exit_mmap (mm/mmap.c:1297) 
[ 16.585198][ C2] ? mmput (kernel/fork.c:1446 kernel/fork.c:1381 kernel/fork.c:1401) 
[ 16.585204][ C2] ? exit_mm (kernel/exit.c:590) 
[ 16.585207][ C2] ? do_exit (kernel/exit.c:943) 
[ 16.585210][ C2] ? do_group_exit (kernel/exit.c:1083) 
[ 16.585213][ C2] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 16.585218][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.585223][ C2] __put_net (net/core/net_namespace.c:732) 
[ 16.585227][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 16.585231][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 16.585234][ C2] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 16.585239][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 16.585243][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.585246][ C2] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 16.585253][ C2] rcu_core (kernel/rcu/tree.c:2826) 
[ 16.585256][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 16.585261][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 16.585263][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 16.585266][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   16.585269][    C2]  </IRQ>
[   16.585271][    C2]  <TASK>
[ 16.585273][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.585275][ C2] RIP: 0010:mas_next_slot (lib/maple_tree.c:4666) 
[ 16.585280][ C2] Code: 89 e0 48 c1 e8 03 80 3c 28 00 0f 85 05 09 00 00 49 8b 04 24 30 c0 49 39 c4 0f 84 91 03 00 00 48 8b 44 24 28 49 89 d2 4d 89 e0 <48> c1 e8 03 80 3c 28 00 0f 85 55 09 00 00 48 8b 4c 24 08 4d 8b 66
All code
========
   0:	89 e0                	mov    %esp,%eax
   2:	48 c1 e8 03          	shr    $0x3,%rax
   6:	80 3c 28 00          	cmpb   $0x0,(%rax,%rbp,1)
   a:	0f 85 05 09 00 00    	jne    0x915
  10:	49 8b 04 24          	mov    (%r12),%rax
  14:	30 c0                	xor    %al,%al
  16:	49 39 c4             	cmp    %rax,%r12
  19:	0f 84 91 03 00 00    	je     0x3b0
  1f:	48 8b 44 24 28       	mov    0x28(%rsp),%rax
  24:	49 89 d2             	mov    %rdx,%r10
  27:	4d 89 e0             	mov    %r12,%r8
  2a:*	48 c1 e8 03          	shr    $0x3,%rax		<-- trapping instruction
  2e:	80 3c 28 00          	cmpb   $0x0,(%rax,%rbp,1)
  32:	0f 85 55 09 00 00    	jne    0x98d
  38:	48 8b 4c 24 08       	mov    0x8(%rsp),%rcx
  3d:	4d                   	rex.WRB
  3e:	8b                   	.byte 0x8b
  3f:	66                   	data16

Code starting with the faulting instruction
===========================================
   0:	48 c1 e8 03          	shr    $0x3,%rax
   4:	80 3c 28 00          	cmpb   $0x0,(%rax,%rbp,1)
   8:	0f 85 55 09 00 00    	jne    0x963
   e:	48 8b 4c 24 08       	mov    0x8(%rsp),%rcx
  13:	4d                   	rex.WRB
  14:	8b                   	.byte 0x8b
  15:	66                   	data16
[   16.585283][    C2] RSP: 0018:ffffc90000a57a80 EFLAGS: 00000287
[   16.585287][    C2] RAX: ffffc90000a57d18 RBX: fffff5200014afa5 RCX: ffffffff87c354df
[   16.585290][    C2] RDX: ffff888008b27d08 RSI: ffffffffffffffff RDI: ffffc90000a57cf0
[   16.585291][    C2] RBP: dffffc0000000000 R08: ffff888008b27d00 R09: 0000000000000001
[   16.585293][    C2] R10: ffff888008b27d08 R11: ffffc90000a57748 R12: ffff888008b27d00
[   16.585295][    C2] R13: 00007f389702cfff R14: ffffc90000a57cf0 R15: fffff5200014afa1
[ 16.585299][ 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) 
[ 16.585306][ C2] ? unlink_anon_vmas (mm/rmap.c:439) 
[ 16.585311][ C2] mas_find (lib/maple_tree.c:6016) 
[ 16.585315][ C2] free_pgtables (mm/memory.c:386) 
[ 16.585321][ C2] ? __pfx_free_pgtables (mm/memory.c:349) 
[ 16.585323][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 16.585328][ C2] ? exit_mmap (./include/linux/seqlock.h:431 ./include/linux/mmap_lock.h:82 ./include/linux/mmap_lock.h:129 mm/mmap.c:1292) 
[ 16.585332][ C2] ? down_write (./arch/x86/include/asm/preempt.h:104 kernel/locking/rwsem.c:1307 kernel/locking/rwsem.c:1313 kernel/locking/rwsem.c:1578) 
[ 16.585334][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 16.585337][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.585341][ C2] ? trace_lock_release (./include/trace/events/lock.h:69 (discriminator 21)) 
[ 16.585345][ C2] exit_mmap (mm/mmap.c:1297) 
[ 16.585348][ C2] ? __pfx_exit_mmap (mm/mmap.c:1259) 
[ 16.585351][ C2] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:727 kernel/locking/mutex.c:746) 
[ 16.585355][ C2] ? lock_release (kernel/locking/lockdep.c:118 kernel/locking/lockdep.c:5879) 
[ 16.585359][ C2] ? __mutex_unlock_slowpath (./arch/x86/include/asm/atomic64_64.h:101 ./include/linux/atomic/atomic-arch-fallback.h:4329 ./include/linux/atomic/atomic-long.h:1506 ./include/linux/atomic/atomic-instrumented.h:4481 kernel/locking/mutex.c:924) 
[ 16.585370][ C2] mmput (kernel/fork.c:1446 kernel/fork.c:1381 kernel/fork.c:1401) 
[ 16.585374][ C2] exit_mm (kernel/exit.c:590) 
[ 16.585377][ C2] do_exit (kernel/exit.c:943) 
[ 16.585381][ C2] do_group_exit (kernel/exit.c:1083) 
[ 16.585385][ C2] __x64_sys_exit_group (kernel/exit.c:1111) 
[ 16.585388][ C2] x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 16.585394][ C2] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 16.585400][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   16.585402][    C2] RIP: 0033:0x7f3897145abd
[ 16.585406][ C2] Code: Unable to access opcode bytes at 0x7f3897145a93.

Code starting with the faulting instruction
===========================================
[   16.585408][    C2] RSP: 002b:00007ffd418d1578 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   16.585411][    C2] RAX: ffffffffffffffda RBX: 00007f38972229c0 RCX: 00007f3897145abd
[   16.585413][    C2] RDX: 00000000000000e7 RSI: ffffffffffffff80 RDI: 0000000000000000
[   16.585415][    C2] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000030
[   16.585416][    C2] R10: 00007ffd418d1400 R11: 0000000000000246 R12: 00007f38972229c0


Finger prints:
mark_lock_irq:mark_lock:mark_usage:__lock_acquire:_raw_spin_lock
handle_softirqs:dump_stack_lvl:__might_resched:down_write:simple_recursive_removal