syzbot

loop0: detected capacity change from 0 to 2048
UDF-fs: error (device loop0): udf_read_tagged: tag checksum failed, block 99: 0x27 != 0x4d
UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000)
------------[ cut here ]------------
WARNING: CPU: 1 PID: 6098 at fs/udf/inode.c:684 udf_extend_file fs/udf/inode.c:683 [inline]
WARNING: CPU: 1 PID: 6098 at fs/udf/inode.c:684 udf_setsize+0xd5a/0x1010 fs/udf/inode.c:1300
Modules linked in:
CPU: 1 UID: 0 PID: 6098 Comm: syz.0.23 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:udf_extend_file fs/udf/inode.c:683 [inline]
RIP: 0010:udf_setsize+0xd5a/0x1010 fs/udf/inode.c:1300
Code: 44 89 e0 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 14 ed 8c fe 45 89 f4 e9 49 fe ff ff e8 07 ed 8c fe 90 <0f> 0b 90 e9 fa f7 ff ff 44 89 e9 80 e1 07 38 c1 0f 8c 3d f3 ff ff
RSP: 0018:ffffc90003a57aa0 EFLAGS: 00010293
RAX: ffffffff8331c049 RBX: ffff888056de9da8 RCX: ffff888026829e00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003a57be0 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1dac84f R12: 0000000000000001
R13: 000000000000001f R14: 0000000000000200 R15: 0000000000001000
FS:  00007f3d405166c0(0000) GS:ffff888126ef6000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f94dfaeb368 CR3: 000000003986a000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 udf_setattr+0x3a2/0x5a0 fs/udf/file.c:236
 notify_change+0xc18/0xf60 fs/attr.c:546
 do_truncate+0x1a4/0x220 fs/open.c:68
 do_ftruncate+0x495/0x550 fs/open.c:195
 do_sys_ftruncate fs/open.c:210 [inline]
 __do_sys_ftruncate fs/open.c:215 [inline]
 __se_sys_ftruncate fs/open.c:213 [inline]
 __x64_sys_ftruncate+0x92/0xf0 fs/open.c:213
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3d40eaf749
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:00007f3d40516038 EFLAGS: 00000246 ORIG_RAX: 000000000000004d
RAX: ffffffffffffffda RBX: 00007f3d41105fa0 RCX: 00007f3d40eaf749
RDX: 0000000000000000 RSI: 000000000000001f RDI: 0000000000000004
RBP: 00007f3d40f33f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3d41106038 R14: 00007f3d41105fa0 R15: 00007ffecd205fe8
 </TASK>