static void t1_subset_end(PDF pdf)
{
    if (t1_synthetic) {
        /*tex Copy to |dup /FontName get exch definefont pop|. */
        while (!strstr(t1_line_array, "definefont")) {
            t1_getline();
            t1_putline(pdf);
        }
        while (!t1_end_eexec()) {
            /*tex Ignore the rest. */
            t1_getline();
        }
        /*tex Write \.{mark currentfile closefile}. */
        t1_putline(pdf);
    } else {
        while (!t1_end_eexec()) {
            /*tex Copy to \.{mark currentfile closefile}. */
            t1_getline();
            t1_putline(pdf);
        }
    }
    t1_stop_eexec(pdf);
    if (fixedcontent) {
        /*tex Copy 512 zeros (not needed for PDF). */
        while (!t1_cleartomark()) {
            t1_getline();
            t1_putline(pdf);
        }
        /*tex Don't check \.{{restore}if} for synthetic fonts. */
        if (!t1_synthetic) {
            /*tex Write \.{{restore}if} if found. */
            t1_check_end(pdf);
        }
    }
    get_length3();
}

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.