------------[ cut here ]------------
WARNING: CPU: 0 PID: 5323 at fs/udf/inode.c:2081 __udf_add_aext+0x524/0x6d0 fs/udf/inode.c:2080
Modules linked in:
CPU: 0 UID: 0 PID: 5323 Comm: syz.0.0 Not tainted 6.15.0-rc3-syzkaller-00076-ge72e9e693307 #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:__udf_add_aext+0x524/0x6d0 fs/udf/inode.c:2080
Code: c1 ef fe 49 8b 3e 4c 89 e6 e8 88 b5 11 ff 31 c0 48 83 c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 3d cc 8d fe 90 <0f> 0b 90 e9 14 fc ff ff e8 2f cc 8d fe 90 0f 0b 90 e9 66 fd ff ff
RSP: 0018:ffffc9000d66f848 EFLAGS: 00010293
RAX: ffffffff83320143 RBX: dffffc0000000000 RCX: ffff88801f242440
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000000001d0
RBP: 1ffff92001acdf71 R08: ffff88801f242440 R09: 0000000000000002
R10: 0000000000000001 R11: 0000000000000000 R12: 00000000000001d0
R13: 0000000000000000 R14: ffffc9000d66fb80 R15: ffffc9000d66fb88
FS:  00007f0844dd46c0(0000) GS:ffff88808d2a3000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f083c828000 CR3: 000000004322e000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 udf_setup_indirect_aext+0x609/0x800 fs/udf/inode.c:2043
 udf_add_aext fs/udf/inode.c:2133 [inline]
 udf_do_extend_file+0x870/0x1180 fs/udf/inode.c:584
 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+0x19a/0x220 fs/open.c:65
 do_ftruncate+0x489/0x540 fs/open.c:192
 do_sys_ftruncate fs/open.c:207 [inline]
 __do_sys_ftruncate fs/open.c:212 [inline]
 __se_sys_ftruncate fs/open.c:210 [inline]
 __x64_sys_ftruncate+0x92/0xf0 fs/open.c:210
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f084898e969
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:00007f0844dd4038 EFLAGS: 00000246 ORIG_RAX: 000000000000004d
RAX: ffffffffffffffda RBX: 00007f0848bb6080 RCX: 00007f084898e969
RDX: 0000000000000000 RSI: 000003fffffffc00 RDI: 000000000000000d
RBP: 00007f0848a10ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f0848bb6080 R15: 00007fffd7bbfdd8
 </TASK>