1 files changed, 59 insertions, 0 deletions
diff --git a/third_party/libwebrtc/test/fuzzers/comfort_noise_decoder_fuzzer.cc b/third_party/libwebrtc/test/fuzzers/comfort_noise_decoder_fuzzer.cc
new file mode 100644
index 0000000000..7f44af99fb
--- /dev/null
+++ b/third_party/libwebrtc/test/fuzzers/comfort_noise_decoder_fuzzer.cc
@@ -0,0 +1,59 @@
+/*
+ *  Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include <algorithm>
+
+#include "api/array_view.h"
+#include "modules/audio_coding/codecs/cng/webrtc_cng.h"
+#include "rtc_base/buffer.h"
+#include "test/fuzzers/fuzz_data_helper.h"
+
+namespace webrtc {
+namespace test {
+namespace {
+
+void FuzzOneInputTest(rtc::ArrayView<const uint8_t> data) {
+  FuzzDataHelper fuzz_data(data);
+  ComfortNoiseDecoder cng_decoder;
+
+  while (1) {
+    if (!fuzz_data.CanReadBytes(1))
+      break;
+    const uint8_t sid_frame_len = fuzz_data.Read<uint8_t>();
+    auto sid_frame = fuzz_data.ReadByteArray(sid_frame_len);
+    if (sid_frame.empty())
+      break;
+    cng_decoder.UpdateSid(sid_frame);
+    if (!fuzz_data.CanReadBytes(3))
+      break;
+    constexpr bool kTrueOrFalse[] = {true, false};
+    const bool new_period = fuzz_data.SelectOneOf(kTrueOrFalse);
+    constexpr size_t kOutputSizes[] = {80, 160, 320, 480};
+    const size_t output_size = fuzz_data.SelectOneOf(kOutputSizes);
+    const size_t num_generate_calls =
+        std::min(fuzz_data.Read<uint8_t>(), static_cast<uint8_t>(17));
+    rtc::BufferT<int16_t> output(output_size);
+    for (size_t i = 0; i < num_generate_calls; ++i) {
+      cng_decoder.Generate(output, new_period);
+    }
+  }
+}
+
+}  // namespace
+}  // namespace test
+
+void FuzzOneInput(const uint8_t* data, size_t size) {
+  if (size > 5000) {
+    return;
+  }
+  test::FuzzOneInputTest(rtc::ArrayView<const uint8_t>(data, size));
+}
+
+}  // namespace webrtc