------------[ cut here ]------------
within_last_ext && elen > ((loff_t)offset + 1) << inode->i_blkbits
WARNING: fs/udf/inode.c:683 at udf_extend_file fs/udf/inode.c:682 [inline], CPU#1: syz.6.429/7994
WARNING: fs/udf/inode.c:683 at udf_setsize+0xde9/0x10b0 fs/udf/inode.c:1298, CPU#1: syz.6.429/7994
Modules linked in:
CPU: 1 UID: 0 PID: 7994 Comm: syz.6.429 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:udf_extend_file fs/udf/inode.c:682 [inline]
RIP: 0010:udf_setsize+0xde9/0x10b0 fs/udf/inode.c:1298
Code: 44 89 e0 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d e9 a6 48 b9 fd cc e8 35 be 6e fe 45 89 f4 e9 2a fe ff ff e8 28 be 6e fe 90 <0f> 0b 90 e9 90 f7 ff ff 44 89 f1 80 e1 07 38 c1 0f 8c ab f2 ff ff
RSP: 0018:ffffc9000351faa0 EFLAGS: 00010283
RAX: ffffffff8356f878 RBX: ffff888053e174f8 RCX: 0000000000080000
RDX: ffffc90006896000 RSI: 0000000000000407 RDI: 0000000000000408
RBP: ffffc9000351fc00 R08: ffff888053e174bb R09: 1ffff1100a7c2e97
R10: dffffc0000000000 R11: ffffed100a7c2e98 R12: 0000000000000001
R13: 1ffff920006a3f68 R14: 0000000000000e00 R15: 0000000000001000
FS:  00007fae07c0e6c0(0000) GS:ffff88812539c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c465ff7 CR3: 000000006a1a7000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 udf_setattr+0x3a1/0x5a0 fs/udf/file.c:245
 notify_change+0xc1a/0xf40 fs/attr.c:556
 do_truncate+0x1c2/0x250 fs/open.c:68
 do_ftruncate+0x490/0x540 fs/open.c:194
 ksys_ftruncate fs/open.c:206 [inline]
 __do_sys_ftruncate fs/open.c:211 [inline]
 __se_sys_ftruncate fs/open.c:209 [inline]
 __x64_sys_ftruncate+0x8f/0xe0 fs/open.c:209
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fae06d9ce59
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:00007fae07c0e028 EFLAGS: 00000246 ORIG_RAX: 000000000000004d
RAX: ffffffffffffffda RBX: 00007fae07016090 RCX: 00007fae06d9ce59
RDX: 0000000000000000 RSI: 0000000000000c00 RDI: 0000000000000004
RBP: 00007fae06e32d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fae07016128 R14: 00007fae07016090 R15: 00007ffedfa09f38
 </TASK>