82 lines
2.4 KiB
C
82 lines
2.4 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 the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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/**
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* This fuzz target performs a zstd round-trip test (compress & decompress),
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* compares the result with the original, and calls abort() on corruption.
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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 <string.h>
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#include "fuzz_helpers.h"
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#include "zstd.h"
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static const int kMaxClevel = 19;
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static ZSTD_CCtx *cctx = NULL;
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static ZSTD_DCtx *dctx = NULL;
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static void* cBuf = NULL;
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static void* rBuf = NULL;
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static size_t bufSize = 0;
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static uint32_t seed;
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static size_t roundTripTest(void *result, size_t resultCapacity,
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void *compressed, size_t compressedCapacity,
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const void *src, size_t srcSize)
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{
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int const cLevel = FUZZ_rand(&seed) % kMaxClevel;
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size_t const cSize = ZSTD_compressCCtx(cctx, compressed, compressedCapacity,
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src, srcSize, cLevel);
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if (ZSTD_isError(cSize)) {
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fprintf(stderr, "Compression error: %s\n", ZSTD_getErrorName(cSize));
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return cSize;
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}
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return ZSTD_decompressDCtx(dctx, result, resultCapacity, compressed, cSize);
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}
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int LLVMFuzzerTestOneInput(const uint8_t *src, size_t size)
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{
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size_t const neededBufSize = ZSTD_compressBound(size);
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seed = FUZZ_seed(src, size);
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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(cBuf);
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free(rBuf);
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cBuf = malloc(neededBufSize);
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rBuf = malloc(neededBufSize);
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bufSize = neededBufSize;
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FUZZ_ASSERT(cBuf && rBuf);
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}
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if (!cctx) {
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cctx = ZSTD_createCCtx();
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FUZZ_ASSERT(cctx);
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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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size_t const result =
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roundTripTest(rBuf, neededBufSize, cBuf, neededBufSize, src, size);
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FUZZ_ASSERT_MSG(!ZSTD_isError(result), ZSTD_getErrorName(result));
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FUZZ_ASSERT_MSG(result == size, "Incorrect regenerated size");
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FUZZ_ASSERT_MSG(!memcmp(src, rBuf, size), "Corruption!");
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}
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#ifndef STATEFULL_FUZZING
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ZSTD_freeCCtx(cctx); cctx = NULL;
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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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