zlib fuzzer

contributed by inferno@chromium.org

zlib/Dockerfile

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+# Copyright 2016 Google Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+################################################################################
+
+FROM ossfuzz/base-libfuzzer
+MAINTAINER inferno@chromium.org
+RUN apt-get install -y make autoconf automake libtool
+
+CMD /src/oss-fuzz/zlib/build.sh

zlib/Jenkinsfile

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+// Copyright 2016 Google Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+////////////////////////////////////////////////////////////////////////////////
+
+def libfuzzerBuild = fileLoader.fromGit('infra/libfuzzer-pipeline.groovy',
+                                        'https://github.com/google/oss-fuzz.git',
+                                        'master', null, '')
+
+libfuzzerBuild {
+  git = "https://github.com/madler/zlib.git"
+}

zlib/build.sh

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+#!/bin/bash -eu
+
+cd /src/zlib
+
+./configure
+make clean all
+
+$CXX $CXXFLAGS -std=c++11 -I. \
+    /src/oss-fuzz/zlib/zlib_uncompress_fuzzer.cc -o /out/zlib_uncompress_fuzzer \
+    /work/libfuzzer/*.o ./libz.a $LDFLAGS

zlib/zlib_uncompress_fuzzer.cc

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+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <stddef.h>
+#include <stdint.h>
+#include <string.h>
+
+#include "zlib.h"
+
+static Bytef buffer[256 * 1024] = { 0 };
+
+// Entry point for LibFuzzer.
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  uLongf buffer_length = static_cast<uLongf>(sizeof(buffer));
+  if (Z_OK != uncompress(buffer, &buffer_length, data,
+                         static_cast<uLong>(size))) {
+    return 0;
+  }
+  return 0;
+}