------------[ cut here ]------------
WARNING: CPU: 0 PID: 17417 at fs/udf/inode.c:1928 __udf_add_aext+0x532/0x6c0 fs/udf/inode.c:1927
Modules linked in:
CPU: 0 PID: 17417 Comm: syz.3.3741 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:__udf_add_aext+0x532/0x6c0 fs/udf/inode.c:1927
Code: c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 46 40 9d fe 0f 0b e9 1b fc ff ff e8 3a 40 9d fe 0f 0b e9 6f fd ff ff e8 2e 40 9d fe <0f> 0b e9 5b fd ff ff 44 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c 02 fb
RSP: 0018:ffffc900043c6da0 EFLAGS: 00010246
RAX: ffffffff82e38ec2 RBX: dffffc0000000000 RCX: 0000000000080000
RDX: ffffc90017f95000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: 0000000000000150 R08: ffff888029530000 R09: 0000000000000002
R10: 0000000000000001 R11: 0000000000000002 R12: 00000000000000b0
R13: 0000000000000000 R14: ffffc900043c71a0 R15: ffffffffffffff68
FS:  00007f1571f0c6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1571ec7f70 CR3: 000000005ee29000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 udf_add_aext fs/udf/inode.c:1989 [inline]
 udf_do_extend_file+0xb3b/0x1030 fs/udf/inode.c:459
 inode_getblk fs/udf/inode.c:686 [inline]
 udf_get_block+0xdd3/0x3cd0 fs/udf/inode.c:359
 __block_write_begin_int+0x54b/0x1a70 fs/buffer.c:1991
 __block_write_begin fs/buffer.c:2041 [inline]
 block_write_begin+0x96/0x1e0 fs/buffer.c:2102
 udf_write_begin+0x31/0x70 fs/udf/inode.c:212
 generic_perform_write+0x2db/0x560 mm/filemap.c:3846
 __generic_file_write_iter+0x2b4/0x430 mm/filemap.c:3942
 udf_file_write_iter+0x28c/0x650 fs/udf/file.c:164
 do_iter_readv_writev fs/read_write.c:-1 [inline]
 do_iter_write+0x62d/0xaf0 fs/read_write.c:861
 iter_file_splice_write+0x665/0xc50 fs/splice.c:685
 do_splice_from fs/splice.c:763 [inline]
 direct_splice_actor+0xe1/0x130 fs/splice.c:950
 splice_direct_to_actor+0x480/0xb60 fs/splice.c:896
 do_splice_direct+0x1b0/0x2b0 fs/splice.c:1002
 do_sendfile+0x5cc/0xeb0 fs/read_write.c:1255
 __do_sys_sendfile64 fs/read_write.c:1323 [inline]
 __se_sys_sendfile64+0x13b/0x190 fs/read_write.c:1309
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f1570f8eec9
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:00007f1571f0c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f15711e5fa0 RCX: 00007f1570f8eec9
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000004
RBP: 00007f1571011f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000800000009 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f15711e6038 R14: 00007f15711e5fa0 R15: 00007ffdff1cc4d8
 </TASK>