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https://github.com/facebook/zstd.git
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3487a60950
Fails on errors when building fuzzers with `fuzz.py` (adds `Werror`). Currently allows `declaration-after-statement`, `c++-compat` and `deprecated` as they are abundant in code (some fixes to `declaration-after-statement` are presented in this commit).
60 lines
1.9 KiB
C
60 lines
1.9 KiB
C
/*
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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* All rights reserved.
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*
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* This source code is licensed under both the BSD-style license (found in the
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* LICENSE file in the root directory of this source tree) and the GPLv2 (found
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* in the COPYING file in the root directory of this source tree).
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* You may select, at your option, one of the above-listed licenses.
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*/
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/**
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* This fuzz target attempts to decompress the fuzzed data with the simple
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* decompression function to ensure the decompressor never crashes.
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*/
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#include <stddef.h>
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#include <stdlib.h>
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#include <stdio.h>
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#define ZSTD_STATIC_LINKING_ONLY
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#include "fuzz_helpers.h"
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#include "zstd.h"
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#include "fuzz_data_producer.h"
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static ZSTD_DCtx *dctx = NULL;
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int LLVMFuzzerTestOneInput(const uint8_t *src, size_t size)
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{
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/* Give a random portion of src data to the producer, to use for
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parameter generation. The rest will be used for (de)compression */
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FUZZ_dataProducer_t *producer = FUZZ_dataProducer_create(src, size);
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size = FUZZ_dataProducer_reserveDataPrefix(producer);
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if (!dctx) {
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dctx = ZSTD_createDCtx();
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FUZZ_ASSERT(dctx);
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}
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{
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size_t const bufSize = FUZZ_dataProducer_uint32Range(producer, 0, 10 * size);
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void *rBuf = FUZZ_malloc(bufSize);
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size_t const dSize = ZSTD_decompressDCtx(dctx, rBuf, bufSize, src, size);
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if (!ZSTD_isError(dSize)) {
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/* If decompression was successful, the content size from the frame header(s) should be valid. */
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unsigned long long const expectedSize = ZSTD_findDecompressedSize(src, size);
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FUZZ_ASSERT(expectedSize != ZSTD_CONTENTSIZE_ERROR);
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FUZZ_ASSERT(expectedSize == ZSTD_CONTENTSIZE_UNKNOWN || expectedSize == dSize);
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}
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free(rBuf);
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}
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FUZZ_dataProducer_free(producer);
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#ifndef STATEFUL_FUZZING
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ZSTD_freeDCtx(dctx); dctx = NULL;
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#endif
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return 0;
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}
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