media: Handle "encrypted" event in pipeline_integration_fuzzertest.

media/test/pipeline_integration_fuzzertest.cc

Index: media/test/pipeline_integration_fuzzertest.cc
diff --git a/media/test/pipeline_integration_fuzzertest.cc b/media/test/pipeline_integration_fuzzertest.cc
index a00b3281a9b3fb935cb52dbebeb3c28c1a1c2e55..0ffd817664a5f813f550a92a9855fb46cfabdab6 100644
--- a/media/test/pipeline_integration_fuzzertest.cc
+++ b/media/test/pipeline_integration_fuzzertest.cc
@@ -4,13 +4,26 @@
 
 #include <stddef.h>
 #include <stdint.h>
+#include <vector>
 
 #include "base/at_exit.h"
+#include "base/bind.h"
 #include "base/command_line.h"
 #include "base/logging.h"
+#include "media/base/eme_constants.h"
 #include "media/base/pipeline_status.h"
 #include "media/test/pipeline_integration_test_base.h"
 
+namespace {
+
+void OnEncryptedMediaInitData(media::PipelineIntegrationTestBase* test,
+                              media::EmeInitDataType /* type */,
+                              const std::vector<uint8_t>& /* init_data */) {
+  test->OnError(media::PIPELINE_ERROR_INITIALIZATION_FAILED);

[ddorwin, 2016/03/03 17:47:47]

LOG(WARNING) with an explanation? At least explain how this can happen and how
it is handled.

[xhwang, 2016/03/03 19:41:32]

fuzzer owners don't like logs in fuzzer tests:

https://chromiumcodereview.appspot.com/1757603002/diff/20001/testing/libfuzze...

[ddorwin, 2016/03/03 19:46:20]

As a comment then?

This one might be worth logging, though. It's telling us that the media was not
actually processed. An attacker could provide this media and an appropriate key
then get further into it than we have fuzzed. (I don't know how much we care
about that case.)

Also, the fact that we fail here means we aren't testing any (potentially)
encrypted media.

[xhwang, 2016/03/03 21:13:31]

Added a comment and a TODO.

+}
+
+}  // namespace
+
 // Entry point for LibFuzzer.
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   // Media pipeline starts new threads, which needs AtExitManager.
@@ -21,6 +34,9 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
 
   media::PipelineIntegrationTestBase test;
 
+  test.set_encrypted_media_init_data_cb(
+      base::Bind(&OnEncryptedMediaInitData, &test));
+
   media::PipelineStatus pipeline_status =
       test.Start(data, size, media::PipelineIntegrationTestBase::kClockless);
   if (pipeline_status != media::PIPELINE_OK)