loop4: detected capacity change from 0 to 2048
UDF-fs: INFO Mounting volume 'LiuxUDF', timestamp 2022/11/22 14:59 (1000)
Oops: general protection fault, probably for non-canonical address 0xdffffc000000000d: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000068-0x000000000000006f]
CPU: 0 UID: 0 PID: 8752 Comm: syz.4.693 Not tainted 6.14.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:__d_unalias+0x199/0x2a0 fs/dcache.c:2969
Code: 98 00 00 00 4c 89 fb 48 c1 eb 03 49 89 ed 80 3c 2b 00 74 08 4c 89 ff e8 a5 5c e7 ff 49 8b 2f 48 83 c5 68 48 89 e8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 ef e8 88 5c e7 ff 4c 8b 5d 00 4d 85 db
RSP: 0018:ffffc900105675d8 EFLAGS: 00010212
RAX: 000000000000000d RBX: 1ffff11009b07fbf RCX: 0000000000080000
RDX: ffffc9000d2db000 RSI: 00000000000002d0 RDI: 00000000000002d1
RBP: 0000000000000068 R08: ffff88807b3f0df3 R09: 1ffff1100f67e1be
R10: dffffc0000000000 R11: ffffed100f67e1bf R12: ffff88804d83fd60
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff88804d83fdf8
FS:  00007fc32fa286c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000052b9c000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 d_splice_alias+0x1e6/0x330 fs/dcache.c:3037
 udf_lookup+0x1f4/0x2b0 fs/udf/namei.c:130
 __lookup_slow+0x298/0x400 fs/namei.c:1793
 lookup_slow+0x53/0x70 fs/namei.c:1810
 walk_component fs/namei.c:2114 [inline]
 link_path_walk+0x99b/0xea0 fs/namei.c:2479
 path_parentat fs/namei.c:2683 [inline]
 __filename_parentat+0x2a7/0x740 fs/namei.c:2707
 filename_parentat fs/namei.c:2725 [inline]
 do_renameat2+0x3b8/0x13f0 fs/namei.c:5138
 __do_sys_rename fs/namei.c:5273 [inline]
 __se_sys_rename fs/namei.c:5271 [inline]
 __x64_sys_rename+0x82/0x90 fs/namei.c:5271
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc32eb8cda9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc32fa28038 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 00007fc32eda5fa0 RCX: 00007fc32eb8cda9
RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000020000000
RBP: 00007fc32ec0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fc32eda5fa0 R15: 00007ffc255eefb8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__d_unalias+0x199/0x2a0 fs/dcache.c:2969
Code: 98 00 00 00 4c 89 fb 48 c1 eb 03 49 89 ed 80 3c 2b 00 74 08 4c 89 ff e8 a5 5c e7 ff 49 8b 2f 48 83 c5 68 48 89 e8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 ef e8 88 5c e7 ff 4c 8b 5d 00 4d 85 db
RSP: 0018:ffffc900105675d8 EFLAGS: 00010212
RAX: 000000000000000d RBX: 1ffff11009b07fbf RCX: 0000000000080000
RDX: ffffc9000d2db000 RSI: 00000000000002d0 RDI: 00000000000002d1
RBP: 0000000000000068 R08: ffff88807b3f0df3 R09: 1ffff1100f67e1be
R10: dffffc0000000000 R11: ffffed100f67e1bf R12: ffff88804d83fd60
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff88804d83fdf8
FS:  00007fc32fa286c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000052b9c000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess):
   0:	98                   	cwtl
   1:	00 00                	add    %al,(%rax)
   3:	00 4c 89 fb          	add    %cl,-0x5(%rcx,%rcx,4)
   7:	48 c1 eb 03          	shr    $0x3,%rbx
   b:	49 89 ed             	mov    %rbp,%r13
   e:	80 3c 2b 00          	cmpb   $0x0,(%rbx,%rbp,1)
  12:	74 08                	je     0x1c
  14:	4c 89 ff             	mov    %r15,%rdi
  17:	e8 a5 5c e7 ff       	call   0xffe75cc1
  1c:	49 8b 2f             	mov    (%r15),%rbp
  1f:	48 83 c5 68          	add    $0x68,%rbp
  23:	48 89 e8             	mov    %rbp,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	48 89 ef             	mov    %rbp,%rdi
  34:	e8 88 5c e7 ff       	call   0xffe75cc1
  39:	4c 8b 5d 00          	mov    0x0(%rbp),%r11
  3d:	4d 85 db             	test   %r11,%r11