------------[ cut here ]------------
WARNING: CPU: 1 PID: 7435 at fs/udf/inode.c:2077 __udf_add_aext+0x540/0x6d0 fs/udf/inode.c:2076
Modules linked in:
CPU: 1 UID: 0 PID: 7435 Comm: syz.8.147 Not tainted 6.15.0-syzkaller-10820-gcd2e103d57e5 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:__udf_add_aext+0x540/0x6d0 fs/udf/inode.c:2076
Code: 5f 5d e9 83 59 2c 08 cc e8 3d 59 8c fe 90 0f 0b 90 e9 14 fc ff ff e8 2f 59 8c fe 90 0f 0b 90 e9 66 fd ff ff e8 21 59 8c 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:ffffc900038ff840 EFLAGS: 00010283
RAX: ffffffff8333e0bf RBX: dffffc0000000000 RCX: 0000000000080000
RDX: ffffc9000d420000 RSI: 0000000000000478 RDI: 0000000000000479
RBP: 0000000000000010 R08: ffff88801fbb1e00 R09: 0000000000000002
R10: 0000000000000001 R11: 0000000000000002 R12: 00000000000000b0
R13: 0000000000000000 R14: ffffc900038ffac0 R15: 0000000000000000
FS:  00007f1872da56c0(0000) GS:ffff888125d95000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1872da4f98 CR3: 0000000077da8000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 udf_add_aext fs/udf/inode.c:2138 [inline]
 udf_do_extend_file+0x576/0x1180 fs/udf/inode.c:544
 udf_extend_file fs/udf/inode.c:705 [inline]
 udf_setsize+0xb78/0x1000 fs/udf/inode.c:1293
 udf_setattr+0x3a1/0x5a0 fs/udf/file.c:236
 notify_change+0xb33/0xe40 fs/attr.c:552
 do_truncate+0x1a4/0x220 fs/open.c:68
 vfs_truncate+0x493/0x520 fs/open.c:118
 do_sys_truncate+0xdb/0x190 fs/open.c:141
 __do_sys_truncate fs/open.c:153 [inline]
 __se_sys_truncate fs/open.c:151 [inline]
 __x64_sys_truncate+0x5b/0x70 fs/open.c:151
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1871f8e969
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:00007f1872da5038 EFLAGS: 00000246 ORIG_RAX: 000000000000004c
RAX: ffffffffffffffda RBX: 00007f18721b6080 RCX: 00007f1871f8e969
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000200000000100
RBP: 00007f1872010ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f18721b6080 R15: 00007ffcea564dd8
 </TASK>