ftp_genlist(ftpbuf_t *ftp, const char *cmd, const char *path TSRMLS_DC)
{
	php_stream	*tmpstream = NULL;
	databuf_t	*data = NULL;
	char		*ptr;
	int		ch, lastch;
	size_t		size, rcvd;
	size_t		lines;
	char		**ret = NULL;
	char		**entry;
	char		*text;


	if ((tmpstream = php_stream_fopen_tmpfile()) == NULL) {
		php_error_docref(NULL TSRMLS_CC, E_WARNING, "Unable to create temporary file.  Check permissions in temporary files directory.");
		return NULL;
	}

	if (!ftp_type(ftp, FTPTYPE_ASCII)) {
		goto bail;
	}

	if ((data = ftp_getdata(ftp TSRMLS_CC)) == NULL) {
		goto bail;
	}
	ftp->data = data;

	if (!ftp_putcmd(ftp, cmd, path)) {
		goto bail;
	}
	if (!ftp_getresp(ftp) || (ftp->resp != 150 && ftp->resp != 125 && ftp->resp != 226)) {
		goto bail;
	}

	/* some servers don't open a ftp-data connection if the directory is empty */
	if (ftp->resp == 226) {
		ftp->data = data_close(ftp, data);
		php_stream_close(tmpstream);
		return ecalloc(1, sizeof(char*));
	}

	/* pull data buffer into tmpfile */
	if ((data = data_accept(data, ftp TSRMLS_CC)) == NULL) {
		goto bail;
	}
	size = 0;
	lines = 0;
	lastch = 0;
	while ((rcvd = my_recv(ftp, data->fd, data->buf, FTP_BUFSIZE))) {
		if (rcvd == -1 || rcvd > ((size_t)(-1))-size) {
			goto bail;
		}

		php_stream_write(tmpstream, data->buf, rcvd);

		size += rcvd;
                for (ptr = data->buf; rcvd; rcvd--, ptr++) {
                        if (*ptr == '\n' && lastch == '\r') {
                                lines++;
                        }
                        lastch = *ptr;
                }
			lastch = *ptr;
		}
	}

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.