json_t *json_web_config(const char *url)
{
	struct data_buffer all_data = {NULL, 0};
	char curl_err_str[CURL_ERROR_SIZE];
	long timeout = 60;
	json_error_t err;
	json_t *val;
	CURL *curl;
	int rc;

	memset(&err, 0, sizeof(err));

	curl = curl_easy_init();
	if (unlikely(!curl))
		quithere(1, "CURL initialisation failed");

	curl_easy_setopt(curl, CURLOPT_TIMEOUT, timeout);

	curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1);
	curl_easy_setopt(curl, CURLOPT_URL, url);
	curl_easy_setopt(curl, CURLOPT_ENCODING, "");
	curl_easy_setopt(curl, CURLOPT_FAILONERROR, 1);

	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, all_data_cb);
	curl_easy_setopt(curl, CURLOPT_WRITEDATA, &all_data);
	curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, curl_err_str);
	curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1);
	curl_easy_setopt(curl, CURLOPT_USE_SSL, CURLUSESSL_TRY);

	val = NULL;
	rc = curl_easy_perform(curl);
	curl_easy_cleanup(curl);
	if (rc) {
		applog(LOG_ERR, "HTTP config request of '%s' failed: %s", url, curl_err_str);
		goto c_out;
	}

	if (!all_data.buf) {
		applog(LOG_ERR, "Empty config data received from '%s'", url);
		goto c_out;
	}

	val = JSON_LOADS(all_data.buf, &err);
	if (!val) {
		applog(LOG_ERR, "JSON config decode of '%s' failed(%d): %s", url,
		       err.line, err.text);
	}
	databuf_free(&all_data);

c_out:
	return val;
}

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.