xfs_buf_read_map(
	struct xfs_buftarg	*target,
	struct xfs_buf_map	*map,
	int			nmaps,
	xfs_buf_flags_t		flags,
	const struct xfs_buf_ops *ops)
{
	struct xfs_buf		*bp;

	flags |= XBF_READ;

	bp = xfs_buf_get_map(target, map, nmaps, flags);
	if (bp) {
		trace_xfs_buf_read(bp, flags, _RET_IP_);

		if (!XFS_BUF_ISDONE(bp)) {
			XFS_STATS_INC(xb_get_read);
			bp->b_ops = ops;
			_xfs_buf_read(bp, flags);
		} else if (flags & XBF_ASYNC) {
			/*
			 * Read ahead call which is already satisfied,
			 * drop the buffer
			 */
			xfs_buf_relse(bp);
			return NULL;
		} else {
			/* We do not want read in the flags */
			bp->b_flags &= ~XBF_READ;
		}
	}

	return bp;
}

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.