Local stale-data disclosure via ignored zeroing failure

Information disclosure in Linux 7.1 allows local users to read stale on-disk data after an NTFS allocation failure. In ntfs_attr_fallocate(), the check expected a positive return from ntfs_dio_zero_range(), although that helper returns zero or a negative errno, so failed zeroing was ignored and uninitialized clusters became readable file data. The path requires local write access to an NTFS file and a block-zeroing failure; published material reports stale-data exposure, not code execution or service interruption.