65 lines
1.8 KiB
C
65 lines
1.8 KiB
C
/*
|
|
* Copyright (c) 2016-present, Facebook, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This source code is licensed under both the BSD-style license (found in the
|
|
* LICENSE file in the root directory of this source tree) and the GPLv2 (found
|
|
* in the COPYING file in the root directory of this source tree).
|
|
*/
|
|
|
|
/**
|
|
* This fuzz target attempts to decompress the fuzzed data with the dictionary
|
|
* decompression function to ensure the decompressor never crashes. It does not
|
|
* fuzz the dictionary.
|
|
*/
|
|
|
|
#include <stddef.h>
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include "fuzz_helpers.h"
|
|
#include "zstd_helpers.h"
|
|
|
|
static ZSTD_DCtx *dctx = NULL;
|
|
static void* rBuf = NULL;
|
|
static size_t bufSize = 0;
|
|
|
|
int LLVMFuzzerTestOneInput(const uint8_t *src, size_t size)
|
|
{
|
|
FUZZ_dict_t dict;
|
|
size_t neededBufSize;
|
|
|
|
uint32_t seed = FUZZ_seed(&src, &size);
|
|
neededBufSize = MAX(20 * size, (size_t)256 << 10);
|
|
|
|
/* Allocate all buffers and contexts if not already allocated */
|
|
if (neededBufSize > bufSize) {
|
|
free(rBuf);
|
|
rBuf = malloc(neededBufSize);
|
|
bufSize = neededBufSize;
|
|
FUZZ_ASSERT(rBuf);
|
|
}
|
|
if (!dctx) {
|
|
dctx = ZSTD_createDCtx();
|
|
FUZZ_ASSERT(dctx);
|
|
}
|
|
dict = FUZZ_train(src, size, &seed);
|
|
if (FUZZ_rand32(&seed, 0, 1) == 0) {
|
|
ZSTD_decompress_usingDict(dctx,
|
|
rBuf, neededBufSize,
|
|
src, size,
|
|
dict.buff, dict.size);
|
|
} else {
|
|
FUZZ_ZASSERT(ZSTD_DCtx_loadDictionary_advanced(
|
|
dctx, dict.buff, dict.size,
|
|
(ZSTD_dictLoadMethod_e)FUZZ_rand32(&seed, 0, 1),
|
|
(ZSTD_dictContentType_e)FUZZ_rand32(&seed, 0, 2)));
|
|
ZSTD_decompressDCtx(dctx, rBuf, neededBufSize, src, size);
|
|
}
|
|
|
|
free(dict.buff);
|
|
#ifndef STATEFUL_FUZZING
|
|
ZSTD_freeDCtx(dctx); dctx = NULL;
|
|
#endif
|
|
return 0;
|
|
}
|