httpd: reject incoming requests bodies over 64k

(cherry picked from commit 44b7c126c6d2a2002758c12db2f0bb89dc328a3c)

src/network/httpd.c

@@ -1373,6 +1373,7 @@ static void httpd_ClientRecv(httpd_client_t *cl)
         }
     } else if (cl->query.i_body > 0) {
         /* we are reading the body of a request or a channel */
+        assert (cl->query.p_body != NULL);
         i_len = httpd_NetRecv(cl, &cl->query.p_body[cl->i_buffer],
                                cl->query.i_body - cl->i_buffer);
         if (i_len > 0)
@@ -1565,7 +1566,10 @@ static void httpd_ClientRecv(httpd_client_t *cl)
                 /* TODO Mhh, handle the case where the client only
                  * sends a request and closes the connection to
                  * mark the end of the body (probably only RTSP) */
+                if (cl->query.i_body >= 65536)
                     cl->query.p_body = malloc(cl->query.i_body);
+                else
+                    cl->query.p_body = NULL;
                 cl->i_buffer = 0;
                 if (!cl->query.p_body) {
                     switch (cl->query.i_proto) {