loop3: detected capacity change from 0 to 2048
UDF-fs: error (device loop3): udf_process_sequence: Primary Volume Descriptor not found!
UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000)
BUG: kernel NULL pointer dereference, address: 0000000000000068
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 121aec067 P4D 121aec067 PUD 121af0067 PMD 0 
Oops: Oops: 0000 [#1] PREEMPT SMP NOPTI
CPU: 0 UID: 0 PID: 4265 Comm: syz.3.16 Not tainted 6.13.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:__d_unalias fs/dcache.c:2970 [inline]
RIP: 0010:d_splice_alias+0x198/0x330 fs/dcache.c:3038
Code: 00 e8 6c e1 d9 ff 85 c0 0f 84 9e 01 00 00 49 8b 87 28 ff ff ff 48 8b 40 68 48 05 d8 00 00 00 48 89 04 24 49 8b 87 70 ff ff ff <48> 8b 40 68 48 85 c0 74 10 4c 89 f7 e8 47 ee ac 01 84 c0 0f 84 5f
RSP: 0018:ffffc90003777d88 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88810c618d28 RCX: ffffc90003777d3c
RDX: 0000000000000002 RSI: ffffffff83df15f2 RDI: 00000000ffffffff
RBP: ffff88810a480138 R08: 0000000000000000 R09: ffff888104395fa0
R10: 0000000000000001 R11: 00000000000000fe R12: 0000000000000000
R13: ffff88810a480618 R14: ffff88810a480c30 R15: ffff88810a480d58
FS:  00007fe2419ff6c0(0000) GS:ffff88813ba00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000068 CR3: 00000001073a6000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 udf_lookup+0x95/0xe0 fs/udf/namei.c:130
 lookup_one_qstr_excl+0x6d/0xa0 fs/namei.c:1693
 do_rmdir+0x11c/0x1c0 fs/namei.c:4444
 __do_sys_rmdir fs/namei.c:4474 [inline]
 __se_sys_rmdir fs/namei.c:4472 [inline]
 __x64_sys_rmdir+0x3a/0x70 fs/namei.c:4472
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x6d/0x170 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe241f8cda9
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:00007fe2419ff038 EFLAGS: 00000246 ORIG_RAX: 0000000000000054
RAX: ffffffffffffffda RBX: 00007fe2421a5fa0 RCX: 00007fe241f8cda9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000100
RBP: 00007fe24200e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fe2421a5fa0 R15: 00007ffcdfec0cf8
 </TASK>
Modules linked in:
CR2: 0000000000000068
---[ end trace 0000000000000000 ]---
RIP: 0010:__d_unalias fs/dcache.c:2970 [inline]
RIP: 0010:d_splice_alias+0x198/0x330 fs/dcache.c:3038
Code: 00 e8 6c e1 d9 ff 85 c0 0f 84 9e 01 00 00 49 8b 87 28 ff ff ff 48 8b 40 68 48 05 d8 00 00 00 48 89 04 24 49 8b 87 70 ff ff ff <48> 8b 40 68 48 85 c0 74 10 4c 89 f7 e8 47 ee ac 01 84 c0 0f 84 5f
RSP: 0018:ffffc90003777d88 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88810c618d28 RCX: ffffc90003777d3c
RDX: 0000000000000002 RSI: ffffffff83df15f2 RDI: 00000000ffffffff
RBP: ffff88810a480138 R08: 0000000000000000 R09: ffff888104395fa0
R10: 0000000000000001 R11: 00000000000000fe R12: 0000000000000000
R13: ffff88810a480618 R14: ffff88810a480c30 R15: ffff88810a480d58
FS:  00007fe2419ff6c0(0000) GS:ffff88813ba00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000068 CR3: 00000001073a6000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	e8 6c e1 d9 ff       	call   0xffd9e171
   5:	85 c0                	test   %eax,%eax
   7:	0f 84 9e 01 00 00    	je     0x1ab
   d:	49 8b 87 28 ff ff ff 	mov    -0xd8(%r15),%rax
  14:	48 8b 40 68          	mov    0x68(%rax),%rax
  18:	48 05 d8 00 00 00    	add    $0xd8,%rax
  1e:	48 89 04 24          	mov    %rax,(%rsp)
  22:	49 8b 87 70 ff ff ff 	mov    -0x90(%r15),%rax
* 29:	48 8b 40 68          	mov    0x68(%rax),%rax <-- trapping instruction
  2d:	48 85 c0             	test   %rax,%rax
  30:	74 10                	je     0x42
  32:	4c 89 f7             	mov    %r14,%rdi
  35:	e8 47 ee ac 01       	call   0x1acee81
  3a:	84 c0                	test   %al,%al
  3c:	0f                   	.byte 0xf
  3d:	84                   	.byte 0x84
  3e:	5f                   	pop    %rdi