------------[ cut here ]------------
WARNING: CPU: 1 PID: 5424 at fs/udf/inode.c:1935 __udf_add_aext+0x51a/0x6c0 fs/udf/inode.c:1934
Modules linked in:
CPU: 0 PID: 5424 Comm: syz.0.293 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:__udf_add_aext+0x51a/0x6c0 fs/udf/inode.c:1934
Code: 08 4c 89 f7 e8 b7 2f f9 fe 49 8b 3e 4c 89 e6 e8 4c aa 12 ff 31 c0 48 83 c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 86 c7 b4 fe <0f> 0b e9 1b fc ff ff e8 7a c7 b4 fe 0f 0b e9 6f fd ff ff e8 6e c7
RSP: 0018:ffffc9000353f4e0 EFLAGS: 00010246
RAX: ffffffff82c3039a RBX: dffffc0000000000 RCX: 0000000000080000
RDX: ffffc90003dc3000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: 1ffff920006a7ed3 R08: ffff8880212a9dc0 R09: 0000000000000002
R10: 0000000000000001 R11: 0000000000000002 R12: 0000000000000000
R13: 0000000000000004 R14: ffffc9000353f690 R15: ffffc9000353f698
FS:  00007f7df8b2d6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32607ff8 CR3: 00000000613e2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 udf_add_aext fs/udf/inode.c:1992 [inline]
 udf_insert_aext fs/udf/inode.c:2157 [inline]
 udf_update_extents fs/udf/inode.c:1082 [inline]
 inode_getblk fs/udf/inode.c:798 [inline]
 udf_get_block+0x2d8b/0x3ca0 fs/udf/inode.c:358
 __block_write_begin_int+0x54e/0x15a0 fs/buffer.c:2012
 __block_write_begin fs/buffer.c:2062 [inline]
 block_write_begin+0x4d/0xc0 fs/buffer.c:2122
 udf_write_begin+0x35/0x70 fs/udf/inode.c:212
 generic_perform_write+0x2aa/0x530 mm/filemap.c:3785
 __generic_file_write_iter+0x25f/0x4e0 mm/filemap.c:3912
 udf_file_write_iter+0x2a3/0x520 fs/udf/file.c:163
 call_write_iter include/linux/fs.h:2172 [inline]
 new_sync_write fs/read_write.c:507 [inline]
 vfs_write+0x712/0xd00 fs/read_write.c:594
 ksys_pwrite64 fs/read_write.c:701 [inline]
 __do_sys_pwrite64 fs/read_write.c:711 [inline]
 __se_sys_pwrite64 fs/read_write.c:708 [inline]
 __x64_sys_pwrite64+0x194/0x220 fs/read_write.c:708
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f7dfa8c5c29
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:00007f7df8b2d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000012
RAX: ffffffffffffffda RBX: 00007f7dfab0cfa0 RCX: 00007f7dfa8c5c29
RDX: 00000000200000c1 RSI: 00002000000000c0 RDI: 0000000000000006
RBP: 00007f7dfa948e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000404043000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7dfab0d038 R14: 00007f7dfab0cfa0 R15: 00007fff013c0508
 </TASK>