Fuzz Http in chunks

fuzzing/Http.cpp

@@ -2,15 +2,14 @@
 
 #define WIN32_EXPORT
 
+#include "helpers.h"
+
 /* We test the websocket parser */
 #include "../src/HttpParser.h"
 
 /* And the router */
 #include "../src/HttpRouter.h"
 
-/* We use this to pad the fuzz */
-char *padded = new char[1024  * 500];
-
 struct StaticData {
 
     struct RouterData {
@@ -48,22 +47,21 @@ struct StaticData {
 } staticData;
 
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
-
-    /* Pad the fuzz */
+    /* Create parser */
     uWS::HttpParser httpParser;
-    memcpy(padded, data, size);
-
     /* User data */
     void *user = (void *) 13;
 
+    /* Iterate the padded fuzz as chunks */
+    makeChunked(makePadded(data, size), size, [&httpParser, user](const uint8_t *data, size_t size) {
         /* Parse it */
-    httpParser.consumePostPadded(padded, size, user, [](void *s, uWS::HttpRequest *httpRequest) -> void * {
+        httpParser.consumePostPadded((char *) data, size, user, [](void *s, uWS::HttpRequest *httpRequest) -> void * {
 
             /* todo: Route this via router */
 
-        httpRequest->getHeader(httpRequest->getUrl());
-        httpRequest->getMethod();
-        httpRequest->getQuery();
+            readBytes(httpRequest->getHeader(httpRequest->getUrl()));
+            readBytes(httpRequest->getMethod());
+            readBytes(httpRequest->getQuery());
 
             /* Route the method and URL in two passes */
             StaticData::RouterData routerData = {};
@@ -89,6 +87,7 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
             /* Return break */
             return nullptr;
         });
+    });
 
     return 0;
 }

src/HttpParser.h

@@ -248,7 +248,7 @@ public:
 
             int maxCopyDistance = std::min(MAX_FALLBACK_SIZE - fallback.length(), (size_t) length);
 
-            fallback.reserve(maxCopyDistance + 32); // todo: padding should be same as libus
+            fallback.reserve(fallback.length() + maxCopyDistance + 32); // todo: padding should be same as libus
             fallback.append(data, maxCopyDistance);
 
             // break here on break