58 lines
1.5 KiB
C
58 lines
1.5 KiB
C
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/*
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* Copyright (c) 2016-present, Facebook, Inc.
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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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*/
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/**
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* This fuzz target attempts to decompress the fuzzed data with the dictionary
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* decompression function to ensure the decompressor never crashes. It does not
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* fuzz the dictionary.
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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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#include "fuzz_helpers.h"
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#include "zstd_helpers.h"
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static ZSTD_DCtx *dctx = NULL;
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static void* rBuf = NULL;
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static size_t bufSize = 0;
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int LLVMFuzzerTestOneInput(const uint8_t *src, size_t size)
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{
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size_t neededBufSize;
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uint32_t seed = FUZZ_seed(&src, &size);
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neededBufSize = MAX(20 * size, (size_t)256 << 10);
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/* Allocate all buffers and contexts if not already allocated */
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if (neededBufSize > bufSize) {
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free(rBuf);
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rBuf = malloc(neededBufSize);
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bufSize = neededBufSize;
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FUZZ_ASSERT(rBuf);
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}
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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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FUZZ_dict_t dict = FUZZ_train(src, size, &seed);
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ZSTD_decompress_usingDict(dctx,
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rBuf, neededBufSize,
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src, size,
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dict.buff, dict.size);
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free(dict.buff);
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}
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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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