Fix oss-fuzz reported issues

fuzzing/MockedHelloWorld.cpp

@@ -6,14 +6,16 @@
 extern "C" void us_loop_read_mocked_data(struct us_loop *loop, char *data, unsigned int size);
 
 uWS::TemplatedApp<false> *app;
+us_listen_socket_t *listenSocket;
 
 extern "C" int LLVMFuzzerInitialize(int *argc, char ***argv) {
 
     app = new uWS::TemplatedApp<false>(uWS::App().get("/*", [](auto *res, auto *req) {
         res->end("Hello world!");
-    }).listen(9001, [](auto *token) {
-        if (token) {
+    }).listen(9001, [](us_listen_socket_t *listenSocket) {
+        if (listenSocket) {
             std::cout << "Listening on port " << 9001 << std::endl;
+            ::listenSocket = listenSocket;
         }
     }));
 
@@ -25,4 +27,4 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
     us_loop_read_mocked_data((struct us_loop *) uWS::Loop::get(), (char *) makePadded(data, size), size);
 
     return 0;
-}
+}

fuzzing/helpers.h

@@ -9,11 +9,19 @@
 
 /* We use this to pad the fuzz */
 static inline const uint8_t *makePadded(const uint8_t *data, size_t size) {
-    static char *padded = new char[1024  * 500];
+    static int paddedLength = 512 * 1024;
+    static char *padded = new char[128 + paddedLength + 128];
 
-    memcpy(padded, data, size);
+    /* Increase landing area if required */
+    if (paddedLength < size) {
+        delete [] padded;
+        paddedLength = size;
+        padded = new char [128 + paddedLength + 128];
+    }
 
-    return (uint8_t *) padded;
+    memcpy(padded + 128, data, size);
+
+    return (uint8_t *) padded + 128;
 }
 
 /* Splits the fuzz data in one or many chunks */