------------[ 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#0: syz.6.114/6713
Modules linked in:
CPU: 0 UID: 0 PID: 6713 Comm: syz.6.114 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/27/2026
RIP: 0010:__udf_add_aext+0x540/0x6d0 fs/udf/inode.c:2083
Code: 5f 5d c3 cc cc cc cc cc e8 9d 1e 7b fe 90 0f 0b 90 e9 14 fc ff ff e8 8f 1e 7b fe 90 0f 0b 90 e9 66 fd ff ff e8 81 1e 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:ffffc900044b7300 EFLAGS: 00010293
RAX: ffffffff8349361f RBX: dffffc0000000000 RCX: ffff888028370000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000008 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000001 R12: 00000000000000b0
R13: 0000000000000000 R14: ffffc900044b7720 R15: 0000000000000000
FS:  00007fe278ead6c0(0000) GS:ffff88812633c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001680 CR3: 00000000312c6000 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
 inode_getblk fs/udf/inode.c:843 [inline]
 udf_map_block+0x1005/0x4330 fs/udf/inode.c:454
 __udf_get_block+0x52/0x250 fs/udf/inode.c:468
 __block_write_begin_int+0x6c6/0x1910 fs/buffer.c:2142
 block_write_begin+0x8d/0x120 fs/buffer.c:2253
 udf_write_begin+0x11a/0x270 fs/udf/inode.c:262
 generic_perform_write+0x2af/0x8b0 mm/filemap.c:4319
 udf_file_write_iter+0x2d5/0x6c0 fs/udf/file.c:112
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x629/0xba0 fs/read_write.c:688
 ksys_pwrite64 fs/read_write.c:795 [inline]
 __do_sys_pwrite64 fs/read_write.c:803 [inline]
 __se_sys_pwrite64 fs/read_write.c:800 [inline]
 __x64_sys_pwrite64+0x19c/0x230 fs/read_write.c:800
 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: 0033:0x7fe27ac7c799
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:00007fe278ead028 EFLAGS: 00000246 ORIG_RAX: 0000000000000012
RAX: ffffffffffffffda RBX: 00007fe27aef6090 RCX: 00007fe27ac7c799
RDX: 0000000000000001 RSI: 0000200000000140 RDI: 0000000000000006
RBP: 00007fe27ad12c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000008080c61 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe27aef6128 R14: 00007fe27aef6090 R15: 00007fffb5e90bc8
 </TASK>