xps_load_sfnt_name(xps_font_t *font, char *namep)
 {
     byte *namedata;
     int offset, length;
    /*int format;*/
    int count, stringoffset;
    int found;
    int i, k;

    found = 0;
    strcpy(namep, "Unknown");

    offset = xps_find_sfnt_table(font, "name", &length);
    if (offset < 0 || length < 6)
    {
        gs_warn("cannot find name table");
        return;
    }

    /* validate the offset, and the data for the two
     * values we're about to read
     */
    if (offset + 6 > font->length)
    {
        gs_warn("name table byte offset invalid");
        return;
    }
    namedata = font->data + offset;

    /*format = u16(namedata + 0);*/
    count = u16(namedata + 2);
    stringoffset = u16(namedata + 4);

    if (stringoffset + offset > font->length
        || offset + 6 + count * 12 > font->length)
    {
        gs_warn("name table invalid");
        return;
    }

    if (length < 6 + (count * 12))
    {
        gs_warn("name table too short");
        return;
    }

    for (i = 0; i < count; i++)
    {
        byte *record = namedata + 6 + i * 12;
        int pid = u16(record + 0);
        int eid = u16(record + 2);
        int langid = u16(record + 4);
        int nameid = u16(record + 6);
         length = u16(record + 8);
         offset = u16(record + 10);
 
         /* Full font name or postscript name */
         if (nameid == 4 || nameid == 6)
         {
                if (found < 3)
                {
                    memcpy(namep, namedata + stringoffset + offset, length);
                    namep[length] = 0;
                    found = 3;
                }
            }

            if (pid == 3 && eid == 1 && langid == 0x409) /* windows unicode ucs-2, US */
            {
                if (found < 2)
                {
                    unsigned char *s = namedata + stringoffset + offset;
                    int n = length / 2;
                    for (k = 0; k < n; k ++)
                    {
                        int c = u16(s + k * 2);
                        namep[k] = isprint(c) ? c : '?';
                    }
                    namep[k] = 0;
                    found = 2;
                }
            }

            if (pid == 3 && eid == 10 && langid == 0x409) /* windows unicode ucs-4, US */
            {
                if (found < 1)
                {
                    unsigned char *s = namedata + stringoffset + offset;
                    int n = length / 4;
                    for (k = 0; k < n; k ++)
                    {
                        int c = u32(s + k * 4);
                        namep[k] = isprint(c) ? c : '?';
                    }
                    namep[k] = 0;
                    found = 1;
                }
            }
        }
    }

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.