mirror of https://github.com/google/snappy.git
59 lines
2.4 KiB
C++
59 lines
2.4 KiB
C++
// Copyright 2019 Google Inc. All Rights Reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// libFuzzer harness for fuzzing snappy's decompression code.
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#include <stddef.h>
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#include <stdint.h>
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#include <cassert>
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#include <string>
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#include "snappy.h"
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// Entry point for LibFuzzer.
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extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
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std::string input(reinterpret_cast<const char*>(data), size);
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// Avoid self-crafted decompression bombs.
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size_t uncompressed_size;
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constexpr size_t kMaxUncompressedSize = 1 << 20;
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bool get_uncompressed_length_succeeded = snappy::GetUncompressedLength(
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input.data(), input.size(), &uncompressed_size);
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if (!get_uncompressed_length_succeeded ||
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(uncompressed_size > kMaxUncompressedSize)) {
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return 0;
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}
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std::string uncompressed;
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// The return value of snappy::Uncompress() is ignored because decompression
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// will fail on invalid inputs.
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snappy::Uncompress(input.data(), input.size(), &uncompressed);
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return 0;
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}
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