------------[ cut here ]------------
iinfo->i_lenAlloc != epos->offset - udf_file_entry_alloc_offset(inode)
WARNING: fs/udf/inode.c:2084 at __udf_add_aext+0x540/0x6d0 fs/udf/inode.c:2083, CPU#1: syz.4.29/6098
Modules linked in:
CPU: 1 UID: 0 PID: 6098 Comm: syz.4.29 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:__udf_add_aext+0x540/0x6d0 fs/udf/inode.c:2083
Code: 5f 5d e9 13 da dc 07 cc e8 7d 57 7b fe 90 0f 0b 90 e9 14 fc ff ff e8 6f 57 7b fe 90 0f 0b 90 e9 66 fd ff ff e8 61 57 7b fe 90 <0f> 0b 90 e9 50 fd ff ff 44 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c f7
RSP: 0018:ffffc9000523f800 EFLAGS: 00010283
RAX: ffffffff8348f8af RBX: dffffc0000000000 RCX: 0000000000080000
RDX: ffffc9000ebfb000 RSI: 00000000000004c0 RDI: 00000000000004c1
RBP: 0000000000000008 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000001 R12: 00000000000000d8
R13: 0000000000000008 R14: ffffc9000523faa0 R15: 0000000000000000
FS:  00007f844c5ce6c0(0000) GS:ffff888126440000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f844c5ccf00 CR3: 000000003504e000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 udf_add_aext fs/udf/inode.c:2145 [inline]
 udf_do_extend_file+0x5a8/0x11e0 fs/udf/inode.c:551
 udf_extend_file fs/udf/inode.c:712 [inline]
 udf_setsize+0xbff/0x10b0 fs/udf/inode.c:1300
 udf_setattr+0x3a2/0x5a0 fs/udf/file.c:238
 notify_change+0xc18/0xf60 fs/attr.c:556
 do_truncate+0x1c2/0x250 fs/open.c:68
 vfs_truncate+0x4b7/0x540 fs/open.c:118
 do_sys_truncate+0xf3/0x1c0 fs/open.c:142
 __do_sys_truncate fs/open.c:154 [inline]
 __se_sys_truncate fs/open.c:152 [inline]
 __x64_sys_truncate+0x5b/0x70 fs/open.c:152
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f844e37c799
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f844c5ce028 EFLAGS: 00000246 ORIG_RAX: 000000000000004c
RAX: ffffffffffffffda RBX: 00007f844e5f5fa0 RCX: 00007f844e37c799
RDX: 0000000000000000 RSI: 00000000000006e3 RDI: 00002000000000c0
RBP: 00007f844e412bd9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f844e5f6038 R14: 00007f844e5f5fa0 R15: 00007fffa71fbb48
 </TASK>