------------[ cut here ]------------
within_last_ext && elen > ((loff_t)offset + 1) << inode->i_blkbits
WARNING: fs/udf/inode.c:691 at udf_extend_file fs/udf/inode.c:691 [inline], CPU#1: syz.1.560/8168
WARNING: fs/udf/inode.c:691 at udf_setsize+0x98c/0x1040 fs/udf/inode.c:1304, CPU#1: syz.1.560/8168
Modules linked in:
CPU: 1 UID: 0 PID: 8168 Comm: syz.1.560 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/05/2026
RIP: 0010:udf_extend_file fs/udf/inode.c:691 [inline]
RIP: 0010:udf_setsize+0x98c/0x1040 fs/udf/inode.c:1304
Code: 43 5b fe 44 89 e1 44 8b a5 e0 fe ff ff 49 d3 e5 4c 89 ee 4c 89 e7 e8 83 3d 5b fe 4d 39 ec 0f 8e 07 fd ff ff e8 95 43 5b fe 90 <0f> 0b 90 e9 f9 fc ff ff e8 87 43 5b fe 4c 8d a3 b8 fe ff ff 4c 89
RSP: 0018:ffffc9000391faa0 EFLAGS: 00010283
RAX: 00000000000009e9 RBX: ffff888077733b50 RCX: ffffc900044d1000
RDX: 0000000000080000 RSI: ffffffff83b0f1db RDI: ffff888033a63e80
RBP: ffffc9000391fc40 R08: 0000000000000006 R09: 0000000000003e00
R10: 0000000000003c00 R11: 0000000000000000 R12: 0000000000003e00
R13: 0000000000003c00 R14: 0000000000000001 R15: 0000000000004a8e
FS:  00007f7c3c3f66c0(0000) GS:ffff888122a44000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7213768000 CR3: 0000000075cb6000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 udf_setattr+0x5f8/0x7d0 fs/udf/file.c:238
 notify_change+0xb25/0x1330 fs/attr.c:556
 do_truncate+0x1df/0x240 fs/open.c:68
 do_ftruncate+0x57b/0x8a0 fs/open.c:194
 ksys_ftruncate+0x61/0xb0 fs/open.c:206
 __do_sys_ftruncate fs/open.c:211 [inline]
 __se_sys_ftruncate fs/open.c:209 [inline]
 __x64_sys_ftruncate+0x55/0x80 fs/open.c:209
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7c3e19e559
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:00007f7c3c3f6028 EFLAGS: 00000246 ORIG_RAX: 000000000000004d
RAX: ffffffffffffffda RBX: 00007f7c3e425fa0 RCX: 00007f7c3e19e559
RDX: 0000000000000000 RSI: 0000000000004a8e RDI: 0000000000000004
RBP: 00007f7c3e2358b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7c3e426038 R14: 00007f7c3e425fa0 R15: 00007ffe5cc2ba68
 </TASK>