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63 lines
1.9 KiB
63 lines
1.9 KiB
/*
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* Copyright 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 <fuzzer/FuzzedDataProvider.h>
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#include "osi/include/compat.h"
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#define MAX_BUFFER_SIZE 4096
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extern "C" int LLVMFuzzerTestOneInput(const uint8_t* Data, size_t Size) {
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// Our functions are only defined with __GLIBC__
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#if __GLIBC__
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// Init our wrapper
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FuzzedDataProvider dataProvider(Data, Size);
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size_t buf_size =
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dataProvider.ConsumeIntegralInRange<size_t>(0, MAX_BUFFER_SIZE);
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if (buf_size == 0) {
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return 0;
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}
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// Set up our buffers
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// NOTE: If the src buffer is not NULL-terminated, the strlcpy will
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// overread regardless of the len arg. Force null-term for now.
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std::vector<char> bytes =
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dataProvider.ConsumeBytesWithTerminator<char>(buf_size, '\0');
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if (bytes.empty()) {
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return 0;
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}
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buf_size = bytes.size();
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void* dst_buf = malloc(buf_size);
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if (dst_buf == nullptr) {
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return 0;
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}
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// Call the getId fn just to ensure things don't crash
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gettid();
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// Copy, then concat
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size_t len_to_cpy = dataProvider.ConsumeIntegralInRange<size_t>(0, buf_size);
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strlcpy(reinterpret_cast<char*>(dst_buf),
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reinterpret_cast<char*>(bytes.data()), len_to_cpy);
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strlcat(reinterpret_cast<char*>(dst_buf),
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reinterpret_cast<char*>(bytes.data()), len_to_cpy);
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// Clear out our dest buffer
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free(dst_buf);
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#endif
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return 0;
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}
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