69 lines
2.6 KiB
C++
69 lines
2.6 KiB
C++
/*
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* Copyright (C) 2020 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <binder/MemoryDealer.h>
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#include <commonFuzzHelpers.h>
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#include <fuzzer/FuzzedDataProvider.h>
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#include <string>
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#include <unordered_set>
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namespace android {
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static constexpr size_t kMaxBufferSize = 10000;
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static constexpr size_t kMaxDealerSize = 1024 * 512;
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static constexpr size_t kMaxAllocSize = 1024;
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// Fuzzer entry point.
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extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
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if (size > kMaxBufferSize) {
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return 0;
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}
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FuzzedDataProvider fdp(data, size);
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size_t dSize = fdp.ConsumeIntegralInRange<size_t>(0, kMaxDealerSize);
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std::string name = fdp.ConsumeRandomLengthString(fdp.remaining_bytes());
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uint32_t flags = fdp.ConsumeIntegral<uint32_t>();
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sp<MemoryDealer> dealer = new MemoryDealer(dSize, name.c_str(), flags);
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// This is used to track offsets that have been freed already to avoid an expected fatal log.
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std::unordered_set<size_t> free_list;
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while (fdp.remaining_bytes() > 0) {
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fdp.PickValueInArray<std::function<void()>>({
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[&]() -> void { dealer->getAllocationAlignment(); },
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[&]() -> void { dealer->getMemoryHeap(); },
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[&]() -> void {
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std::string randString = fdp.ConsumeRandomLengthString(fdp.remaining_bytes());
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dealer->dump(randString.c_str());
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},
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[&]() -> void {
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size_t allocSize = fdp.ConsumeIntegralInRange<size_t>(0, kMaxAllocSize);
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sp<IMemory> allocated = dealer->allocate(allocSize);
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// If the allocation was successful, try to write to it
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if (allocated != nullptr && allocated->unsecurePointer() != nullptr) {
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memset(allocated->unsecurePointer(), 1, allocated->size());
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// Clear the address from freelist since it has been allocated over again.
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free_list.erase(allocated->offset());
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}
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},
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})();
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}
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return 0;
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}
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} // namespace android
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