 gplotRead(const char  *filename)
 {
char     buf[L_BUFSIZE];
 char    *rootname, *title, *xlabel, *ylabel, *ignores;
 l_int32  outformat, ret, version, ignore;
 FILE    *fp;
GPLOT   *gplot;

    PROCNAME("gplotRead");

    if (!filename)
        return (GPLOT *)ERROR_PTR("filename not defined", procName, NULL);

    if ((fp = fopenReadStream(filename)) == NULL)
        return (GPLOT *)ERROR_PTR("stream not opened", procName, NULL);

    ret = fscanf(fp, "Gplot Version %d\n", &version);
    if (ret != 1) {
        fclose(fp);
        return (GPLOT *)ERROR_PTR("not a gplot file", procName, NULL);
    }
    if (version != GPLOT_VERSION_NUMBER) {
        fclose(fp);
         return (GPLOT *)ERROR_PTR("invalid gplot version", procName, NULL);
     }
 
    ignore = fscanf(fp, "Rootname: %511s\n", buf);  /* L_BUFSIZE - 1 */
     rootname = stringNew(buf);
     ignore = fscanf(fp, "Output format: %d\n", &outformat);
    ignores = fgets(buf, L_BUFSIZE, fp);   /* Title: ... */
     title = stringNew(buf + 7);
     title[strlen(title) - 1] = '\0';
    ignores = fgets(buf, L_BUFSIZE, fp);   /* X axis label: ... */
     xlabel = stringNew(buf + 14);
     xlabel[strlen(xlabel) - 1] = '\0';
    ignores = fgets(buf, L_BUFSIZE, fp);   /* Y axis label: ... */
     ylabel = stringNew(buf + 14);
     ylabel[strlen(ylabel) - 1] = '\0';
 
    gplot = gplotCreate(rootname, outformat, title, xlabel, ylabel);
    LEPT_FREE(rootname);
    LEPT_FREE(title);
    LEPT_FREE(xlabel);
    LEPT_FREE(ylabel);
    if (!gplot) {
        fclose(fp);
        return (GPLOT *)ERROR_PTR("gplot not made", procName, NULL);
    }
    sarrayDestroy(&gplot->cmddata);
    sarrayDestroy(&gplot->datanames);
    sarrayDestroy(&gplot->plotdata);
     sarrayDestroy(&gplot->plottitles);
     numaDestroy(&gplot->plotstyles);
 
    ignore = fscanf(fp, "Commandfile name: %511s\n", buf);  /* L_BUFSIZE - 1 */
     stringReplace(&gplot->cmdname, buf);
     ignore = fscanf(fp, "\nCommandfile data:");
     gplot->cmddata = sarrayReadStream(fp);
    ignore = fscanf(fp, "\nDatafile names:");
    gplot->datanames = sarrayReadStream(fp);
    ignore = fscanf(fp, "\nPlot data:");
    gplot->plotdata = sarrayReadStream(fp);
    ignore = fscanf(fp, "\nPlot titles:");
    gplot->plottitles = sarrayReadStream(fp);
    ignore = fscanf(fp, "\nPlot styles:");
     gplot->plotstyles = numaReadStream(fp);
 
     ignore = fscanf(fp, "Number of plots: %d\n", &gplot->nplots);
    ignore = fscanf(fp, "Output file name: %511s\n", buf);
     stringReplace(&gplot->outname, buf);
     ignore = fscanf(fp, "Axis scaling: %d\n", &gplot->scaling);
 
    fclose(fp);
    return gplot;
}

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.