go-libwebp

Experimental translation from libwebp to Go source.
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animdecoder_fuzzer.cc (2519B)

      1 // Copyright 2020 Google Inc.
      2 //
      3 // Licensed under the Apache License, Version 2.0 (the "License");
      4 // you may not use this file except in compliance with the License.
      5 // You may obtain a copy of the License at
      6 //
      7 //      http://www.apache.org/licenses/LICENSE-2.0
      8 //
      9 // Unless required by applicable law or agreed to in writing, software
     10 // distributed under the License is distributed on an "AS IS" BASIS,
     11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     12 // See the License for the specific language governing permissions and
     13 // limitations under the License.
     14 //
     15 ////////////////////////////////////////////////////////////////////////////////
     16 
     17 #include <cstddef>
     18 #include <cstdint>
     19 #include <string_view>
     20 
     21 #include "./fuzz_utils.h"
     22 #include "imageio/imageio_util.h"
     23 #include "src/webp/decode.h"
     24 #include "src/webp/demux.h"
     25 #include "src/webp/mux_types.h"
     26 
     27 namespace {
     28 
     29 void AnimDecoderTest(std::string_view blob) {
     30   const uint8_t* const data = reinterpret_cast<const uint8_t*>(blob.data());
     31   const size_t size = blob.size();
     32 
     33   // WebPAnimDecoderGetInfo() is too late to check the canvas size as
     34   // WebPAnimDecoderNew() will handle the allocations.
     35   const size_t kMaxNumBytes = 2684354560;  // RSS (resident set size) limit.
     36   const size_t kMaxNumPixels = kMaxNumBytes / 4;       // At most ARGB.
     37   const size_t kMaxNumPixelsSafe = kMaxNumPixels / 2;  // Allow one buffer copy.
     38   WebPBitstreamFeatures features;
     39   if (WebPGetFeatures(data, size, &features) == VP8_STATUS_OK) {
     40     if (!ImgIoUtilCheckSizeArgumentsOverflow(features.width * 4,
     41                                              features.height) ||
     42         static_cast<size_t>(features.width) * features.height >
     43             kMaxNumPixelsSafe) {
     44       return;
     45     }
     46   }
     47 
     48   // decode everything as an animation
     49   WebPData webp_data = {data, size};
     50   WebPAnimDecoder* const dec = WebPAnimDecoderNew(&webp_data, nullptr);
     51   if (dec == nullptr) return;
     52 
     53   WebPAnimInfo info;
     54   if (!WebPAnimDecoderGetInfo(dec, &info)) goto End;
     55   if (!ImgIoUtilCheckSizeArgumentsOverflow(info.canvas_width * 4,
     56                                            info.canvas_height)) {
     57     goto End;
     58   }
     59 
     60   while (WebPAnimDecoderHasMoreFrames(dec)) {
     61     uint8_t* buf;
     62     int timestamp;
     63     if (!WebPAnimDecoderGetNext(dec, &buf, &timestamp)) break;
     64   }
     65 End:
     66   WebPAnimDecoderDelete(dec);
     67 }
     68 
     69 }  // namespace
     70 
     71 FUZZ_TEST(AnimDecoder, AnimDecoderTest)
     72     .WithDomains(
     73         fuzztest::String()
     74             .WithMaxSize(fuzz_utils::kMaxWebPFileSize + 1));