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Commit 47698b25 authored by Steven Moreland's avatar Steven Moreland
Browse files

libbinder_random_parcel: driver 

Add drivers to randomly send an arbitrary number of parcels to
a CPP or NDK service.

Bug: 224646709
Test: use this driver to run a vibrator service fuzzer
Change-Id: I5e8951da6b0afe7a63d0237eae2d573d36ebca16
parent 2362edf7

libs/binder/tests/parcel_fuzzer/Android.bp

+3 −0
Original line number Original line Diff line number Diff line
@@ -66,10 +66,13 @@ cc_library_static { 
    srcs: [

    srcs: [

        "random_fd.cpp",

        "random_fd.cpp",

        "random_parcel.cpp",

        "random_parcel.cpp",

        "libbinder_driver.cpp",

        "libbinder_ndk_driver.cpp",

    ],

    ],

    shared_libs: [

    shared_libs: [

        "libbase",

        "libbase",

        "libbinder",

        "libbinder",

        "libbinder_ndk",

        "libcutils",

        "libcutils",

        "libutils",

        "libutils",

    ],

    ],

libs/binder/tests/parcel_fuzzer/include_random_parcel/fuzzbinder/libbinder_driver.h

0 → 100644
+37 −0
Original line number Original line Diff line number Diff line 
/*

 * Copyright (C) 2022 The Android Open Source Project

 *

 * 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.

 */



#pragma once



#include <binder/IBinder.h>

#include <fuzzer/FuzzedDataProvider.h>



namespace android {

/**

 * Based on the random data in provider, construct an arbitrary number of

 * Parcel objects and send them to the service in serial.

 *

 * Usage:

 *

 *   extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {

 *       FuzzedDataProvider provider = FuzzedDataProvider(data, size);

 *       // can use provider here to create a service with different options

 *       sp<IFoo> myService = sp<IFoo>::make(...);

 *       fuzzService(myService, std::move(provider));

 *   }

 */

void fuzzService(const sp<IBinder>& binder, FuzzedDataProvider&& provider);

} // namespace android

libs/binder/tests/parcel_fuzzer/include_random_parcel/fuzzbinder/libbinder_ndk_driver.h

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+37 −0
Original line number Original line Diff line number Diff line 
/*

 * Copyright (C) 2022 The Android Open Source Project

 *

 * 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.

 */



#pragma once



#include <android/binder_parcel.h>

#include <fuzzer/FuzzedDataProvider.h>



namespace android {

/**

 * Based on the random data in provider, construct an arbitrary number of

 * Parcel objects and send them to the service in serial.

 *

 * Usage:

 *

 *   extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {

 *       FuzzedDataProvider provider = FuzzedDataProvider(data, size);

 *       // can use provider here to create a service with different options

 *       std::shared_ptr<IFoo> myService = ndk::SharedRefBase<IFoo>::make(...);

 *       fuzzService(myService->asBinder().get(), std::move(provider));

 *   }

 */

void fuzzService(AIBinder* binder, FuzzedDataProvider&& provider);

} // namespace android

libs/binder/tests/parcel_fuzzer/libbinder_driver.cpp

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+37 −0
Original line number Original line Diff line number Diff line 
/*

 * Copyright (C) 2022 The Android Open Source Project

 *

 * 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 <fuzzbinder/libbinder_driver.h>



#include <fuzzbinder/random_parcel.h>



namespace android {



void fuzzService(const sp<IBinder>& binder, FuzzedDataProvider&& provider) {

    while (provider.remaining_bytes() > 0) {

        uint32_t code = provider.ConsumeIntegral<uint32_t>();

        uint32_t flags = provider.ConsumeIntegral<uint32_t>();

        Parcel data;



        std::vector<uint8_t> subData = provider.ConsumeBytes<uint8_t>(

                provider.ConsumeIntegralInRange<size_t>(0, provider.remaining_bytes()));

        fillRandomParcel(&data, FuzzedDataProvider(subData.data(), subData.size()));



        Parcel reply;

        (void)binder->transact(code, data, &reply, flags);

    }

}



} // namespace android

libs/binder/tests/parcel_fuzzer/libbinder_ndk_driver.cpp

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/*

 * Copyright (C) 2022 The Android Open Source Project

 *

 * 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 <fuzzbinder/libbinder_ndk_driver.h>



#include <fuzzbinder/libbinder_driver.h>

#include <fuzzbinder/random_parcel.h>



// libbinder_ndk doesn't export this header which breaks down its API for NDK

// and APEX users, but we need access to it to fuzz.

#include "../../ndk/ibinder_internal.h"



namespace android {



void fuzzService(AIBinder* binder, FuzzedDataProvider&& provider) {

    fuzzService(binder->getBinder(), std::move(provider));

}



} // namespace android