89 lines
2.9 KiB
C++
89 lines
2.9 KiB
C++
/*
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* Copyright 2020 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <android/imagedecoder.h>
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#include <binder/IPCThreadState.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <cstdlib>
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#include <memory>
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#ifdef PNG_MUTATOR_DEFINE_LIBFUZZER_CUSTOM_MUTATOR
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#include <fuzz/png_mutator.h>
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#endif
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struct DecoderDeleter {
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void operator()(AImageDecoder* decoder) const { AImageDecoder_delete(decoder); }
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};
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using DecoderPointer = std::unique_ptr<AImageDecoder, DecoderDeleter>;
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static DecoderPointer makeDecoder(const uint8_t* data, size_t size) {
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AImageDecoder* decoder = nullptr;
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int result = AImageDecoder_createFromBuffer(data, size, &decoder);
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if (result != ANDROID_IMAGE_DECODER_SUCCESS) {
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// This was not a valid image.
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return nullptr;
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}
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return DecoderPointer(decoder);
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}
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struct PixelFreer {
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void operator()(void* pixels) const { std::free(pixels); }
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};
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using PixelPointer = std::unique_ptr<void, PixelFreer>;
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extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
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// Without this call, decoding HEIF may time out on binder IPC calls.
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android::ProcessState::self()->startThreadPool();
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DecoderPointer decoder = makeDecoder(data, size);
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if (!decoder) {
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return 0;
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}
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const AImageDecoderHeaderInfo* info = AImageDecoder_getHeaderInfo(decoder.get());
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int32_t width = AImageDecoderHeaderInfo_getWidth(info);
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int32_t height = AImageDecoderHeaderInfo_getHeight(info);
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// Set an arbitrary limit on the size of an image. The fuzzer runs with a
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// limited amount of memory, and keeping this allocation small allows the
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// fuzzer to continue running to try to find more serious problems. This
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// size is large enough to hold a photo taken by a current gen phone.
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constexpr int32_t kMaxDimension = 5000;
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if (width > kMaxDimension || height > kMaxDimension) {
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return 0;
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}
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size_t stride = AImageDecoder_getMinimumStride(decoder.get());
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size_t pixelSize = height * stride;
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auto pixels = PixelPointer(std::malloc(pixelSize));
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if (!pixels.get()) {
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return 0;
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}
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while (true) {
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int result = AImageDecoder_decodeImage(decoder.get(), pixels.get(), stride, pixelSize);
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if (result != ANDROID_IMAGE_DECODER_SUCCESS) break;
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result = AImageDecoder_advanceFrame(decoder.get());
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if (result != ANDROID_IMAGE_DECODER_SUCCESS) break;
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}
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return 0;
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}
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