Merge "Add additional 2 binder fuzzers"

    defaults: ["binder_fuzz_defaults"],

    srcs: ["TextOutputFuzz.cpp"],

}

cc_fuzz {

    name: "binder_bufferedTextOutputFuzz",

    include_dirs: [

        "frameworks/native/libs/binder",

    ],

    defaults: ["binder_fuzz_defaults"],

    srcs: ["BufferedTextOutputFuzz.cpp"],

}

cc_fuzz {

    name: "binder_memoryDealerFuzz",

    defaults: ["binder_fuzz_defaults"],

    srcs: ["MemoryDealerFuzz.cpp"],

}

/*

 * Copyright (C) 2020 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 <commonFuzzHelpers.h>

#include <fuzzer/FuzzedDataProvider.h>

#include <string>

#include <vector>

#include "BufferedTextOutput.h"

namespace android {

class FuzzBufferedTextOutput : public BufferedTextOutput {

public:

    FuzzBufferedTextOutput(uint32_t flags) : BufferedTextOutput(flags) {}

    virtual status_t writeLines(const struct iovec& buf, size_t) {

        size_t len = buf.iov_len;

        void* tmp_buf = malloc(len);

        if (tmp_buf == NULL) {

            return status_t();

        }

        // This will attempt to read data from iov_base to ensure valid params were passed.

        memcpy(tmp_buf, buf.iov_base, len);

        free(tmp_buf);

        return status_t();

    }

};

// Fuzzer entry point.

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

    FuzzedDataProvider fdp(data, size);

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

    size_t push_count = 0;

    std::shared_ptr<BufferedTextOutput> bTextOutput(new FuzzBufferedTextOutput(flags));

    while (fdp.remaining_bytes() > 0) {

        fdp.PickValueInArray<std::function<void()>>({

                [&]() -> void {

                    bTextOutput->pushBundle();

                    push_count++;

                },

                [&]() -> void {

                    std::string txt = fdp.ConsumeRandomLengthString(fdp.remaining_bytes());

                    size_t len = fdp.ConsumeIntegralInRange<size_t>(0, txt.length());

                    bTextOutput->print(txt.c_str(), len);

                },

                [&]() -> void {

                    if (push_count == 0) return;

                    bTextOutput->popBundle();

                    push_count--;

                },

        })();

    }

    return 0;

}

} // namespace android

/*

 * Copyright (C) 2020 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 <binder/MemoryDealer.h>

#include <commonFuzzHelpers.h>

#include <fuzzer/FuzzedDataProvider.h>

#include <string>

#include <unordered_set>

namespace android {

static constexpr size_t kMaxBufferSize = 10000;

static constexpr size_t kMaxDealerSize = 1024 * 512;

static constexpr size_t kMaxAllocSize = 1024;

// Fuzzer entry point.

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

    if (size > kMaxBufferSize) {

        return 0;

    }

    FuzzedDataProvider fdp(data, size);

    size_t dSize = fdp.ConsumeIntegralInRange<size_t>(0, kMaxDealerSize);

    std::string name = fdp.ConsumeRandomLengthString(fdp.remaining_bytes());

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

    sp<MemoryDealer> dealer = new MemoryDealer(dSize, name.c_str(), flags);

    // This is used to track offsets that have been freed already to avoid an expected fatal log.

    std::unordered_set<size_t> free_list;

    while (fdp.remaining_bytes() > 0) {

        fdp.PickValueInArray<std::function<void()>>({

                [&]() -> void { dealer->getAllocationAlignment(); },

                [&]() -> void { dealer->getMemoryHeap(); },

                [&]() -> void {

                    size_t offset = fdp.ConsumeIntegral<size_t>();

                    // Offset has already been freed, so return instead.

                    if (free_list.find(offset) != free_list.end()) return;

                    dealer->deallocate(offset);

                    free_list.insert(offset);

                },

                [&]() -> void {

                    std::string randString = fdp.ConsumeRandomLengthString(fdp.remaining_bytes());

                    dealer->dump(randString.c_str());

                },

                [&]() -> void {

                    size_t allocSize = fdp.ConsumeIntegralInRange<size_t>(0, kMaxAllocSize);

                    sp<IMemory> allocated = dealer->allocate(allocSize);

                    // If the allocation was successful, try to write to it

                    if (allocated != nullptr && allocated->unsecurePointer() != nullptr) {

                        memset(allocated->unsecurePointer(), 1, allocated->size());

                        // Clear the address from freelist since it has been allocated over again.

                        free_list.erase(allocated->offset());

                    }

                },

        })();

    }

    return 0;

}

} // namespace android