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// Copyright 2020 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.
//
////////////////////////////////////////////////////////////////////////////////
#include <cstddef>
#include <cstdint>
#include "imageio/imageio_util.h"
#include "src/webp/decode.h"
#include "src/webp/demux.h"
#include "src/webp/mux_types.h"
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
// WebPAnimDecoderGetInfo() is too late to check the canvas size as
// WebPAnimDecoderNew() will handle the allocations.
const size_t kMaxNumBytes = 2684354560; // RSS (resident set size) limit.
const size_t kMaxNumPixels = kMaxNumBytes / 4; // At most ARGB.
const size_t kMaxNumPixelsSafe = kMaxNumPixels / 2; // Allow one buffer copy.
WebPBitstreamFeatures features;
if (WebPGetFeatures(data, size, &features) == VP8_STATUS_OK) {
if (!ImgIoUtilCheckSizeArgumentsOverflow(features.width * 4,
features.height) ||
static_cast<size_t>(features.width) * features.height >
kMaxNumPixelsSafe) {
return 0;
}
}
// decode everything as an animation
WebPData webp_data = {data, size};
WebPAnimDecoder* const dec = WebPAnimDecoderNew(&webp_data, nullptr);
if (dec == nullptr) return 0;
WebPAnimInfo info;
if (!WebPAnimDecoderGetInfo(dec, &info)) goto End;
if (!ImgIoUtilCheckSizeArgumentsOverflow(info.canvas_width * 4,
info.canvas_height)) {
goto End;
}
while (WebPAnimDecoderHasMoreFrames(dec)) {
uint8_t* buf;
int timestamp;
if (!WebPAnimDecoderGetNext(dec, &buf, ×tamp)) break;
}
End:
WebPAnimDecoderDelete(dec);
return 0;
}
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