xps_parse_gradient_stops(xps_document *doc, char *base_uri, fz_xml *node,
        struct stop *stops, int maxcount)
 {
        fz_colorspace *colorspace;
       float sample[FZ_MAX_COLORS];
        float rgb[3];
        int before, after;
        int count;
	int i;

	/* We may have to insert 2 extra stops when postprocessing */
	maxcount -= 2;

	count = 0;
	while (node && count < maxcount)
	{
		if (!strcmp(fz_xml_tag(node), "GradientStop"))
		{
			char *offset = fz_xml_att(node, "Offset");
			char *color = fz_xml_att(node, "Color");
			if (offset && color)
			{
				stops[count].offset = fz_atof(offset);
				stops[count].index = count;

				xps_parse_color(doc, base_uri, color, &colorspace, sample);

				fz_convert_color(doc->ctx, fz_device_rgb(doc->ctx), rgb, colorspace, sample + 1);

				stops[count].r = rgb[0];
				stops[count].g = rgb[1];
				stops[count].b = rgb[2];
				stops[count].a = sample[0];

				count ++;
			}
		}
		node = fz_xml_next(node);
	}

	if (count == 0)
	{
		fz_warn(doc->ctx, "gradient brush has no gradient stops");
		stops[0].offset = 0;
		stops[0].r = 0;
		stops[0].g = 0;
		stops[0].b = 0;
		stops[0].a = 1;
		stops[1].offset = 1;
		stops[1].r = 1;
		stops[1].g = 1;
		stops[1].b = 1;
		stops[1].a = 1;
		return 2;
	}

	if (count == maxcount)
		fz_warn(doc->ctx, "gradient brush exceeded maximum number of gradient stops");

	/* Postprocess to make sure the range of offsets is 0.0 to 1.0 */

	qsort(stops, count, sizeof(struct stop), cmp_stop);

	before = -1;
	after = -1;

	for (i = 0; i < count; i++)
	{
		if (stops[i].offset < 0)
			before = i;
		if (stops[i].offset > 1)
		{
			after = i;
			break;
		}
	}

	/* Remove all stops < 0 except the largest one */
	if (before > 0)
	{
		memmove(stops, stops + before, (count - before) * sizeof(struct stop));
		count -= before;
	}

	/* Remove all stops > 1 except the smallest one */
	if (after >= 0)
		count = after + 1;

	/* Expand single stop to 0 .. 1 */
	if (count == 1)
	{
		stops[1] = stops[0];
		stops[0].offset = 0;
		stops[1].offset = 1;
		return 2;
	}

	/* First stop < 0 -- interpolate value to 0 */
	if (stops[0].offset < 0)
	{
		float d = -stops[0].offset / (stops[1].offset - stops[0].offset);
		stops[0].offset = 0;
		stops[0].r = lerp(stops[0].r, stops[1].r, d);
		stops[0].g = lerp(stops[0].g, stops[1].g, d);
		stops[0].b = lerp(stops[0].b, stops[1].b, d);
		stops[0].a = lerp(stops[0].a, stops[1].a, d);
	}

	/* Last stop > 1 -- interpolate value to 1 */
	if (stops[count-1].offset > 1)
	{
		float d = (1 - stops[count-2].offset) / (stops[count-1].offset - stops[count-2].offset);
		stops[count-1].offset = 1;
		stops[count-1].r = lerp(stops[count-2].r, stops[count-1].r, d);
		stops[count-1].g = lerp(stops[count-2].g, stops[count-1].g, d);
		stops[count-1].b = lerp(stops[count-2].b, stops[count-1].b, d);
		stops[count-1].a = lerp(stops[count-2].a, stops[count-1].a, d);
	}

	/* First stop > 0 -- insert a duplicate at 0 */
	if (stops[0].offset > 0)
	{
		memmove(stops + 1, stops, count * sizeof(struct stop));
		stops[0] = stops[1];
		stops[0].offset = 0;
		count++;
	}

	/* Last stop < 1 -- insert a duplicate at 1 */
	if (stops[count-1].offset < 1)
	{
		stops[count] = stops[count-1];
		stops[count].offset = 1;
		count++;
	}

	return count;
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.