am f43125ed: Merge "Fix for security vulnerability in media server DO NOT MERGE" into klp-dev (52b829cb) · Commits · e / os / android_frameworks_av

media/libmedia/ICrypto.cpp

+23 −1

Original line number	Diff line number	Diff line
		@@ -255,7 +255,28 @@ status_t BnCrypto::onTransact(
		}

		AString errorDetailMsg;
		ssize_t result = decrypt(
		ssize_t result;

		size_t sumSubsampleSizes = 0;
		bool overflow = false;
		for (int32_t i = 0; i < numSubSamples; ++i) {
		CryptoPlugin::SubSample &ss = subSamples[i];
		if (sumSubsampleSizes <= SIZE_MAX - ss.mNumBytesOfEncryptedData) {
		sumSubsampleSizes += ss.mNumBytesOfEncryptedData;
		} else {
		overflow = true;
		}
		if (sumSubsampleSizes <= SIZE_MAX - ss.mNumBytesOfClearData) {
		sumSubsampleSizes += ss.mNumBytesOfClearData;
		} else {
		overflow = true;
		}
		}

		if (overflow \|\| sumSubsampleSizes != totalSize) {
		result = -EINVAL;
		} else {
		result = decrypt(
		secure,
		key,
		iv,
		@@ -264,6 +285,7 @@ status_t BnCrypto::onTransact(
		subSamples, numSubSamples,
		secure ? secureBufferId : dstPtr,
		&errorDetailMsg);
		}

		reply->writeInt32(result);