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/*
* Copyright (c) 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).
* You may select, at your option, one of the above-listed licenses.
*/
/**
* This fuzz target attempts to comprss the fuzzed data with the simple
* compression function with an output buffer that may be too small to
* ensure that the compressor never crashes.
*/
#include <stddef.h>
#include <stdlib.h>
#include <stdio.h>
#include "fuzz_helpers.h"
#include "zstd.h"
#include "zstd_errors.h"
#include "zstd_helpers.h"
#include "fuzz_data_producer.h"
static ZSTD_CCtx *cctx = NULL;
int LLVMFuzzerTestOneInput(const uint8_t *src, size_t size)
{
/* Give a random portion of src data to the producer, to use for
parameter generation. The rest will be used for (de)compression */
FUZZ_dataProducer_t *producer = FUZZ_dataProducer_create(src, size);
size = FUZZ_dataProducer_reserveDataPrefix(producer);
size_t const maxSize = ZSTD_compressBound(size);
size_t const bufSize = FUZZ_dataProducer_uint32Range(producer, 0, maxSize);
int const cLevel = FUZZ_dataProducer_int32Range(producer, kMinClevel, kMaxClevel);
if (!cctx) {
cctx = ZSTD_createCCtx();
FUZZ_ASSERT(cctx);
}
void *rBuf = FUZZ_malloc(bufSize);
size_t const ret = ZSTD_compressCCtx(cctx, rBuf, bufSize, src, size, cLevel);
if (ZSTD_isError(ret)) {
FUZZ_ASSERT(ZSTD_getErrorCode(ret) == ZSTD_error_dstSize_tooSmall);
}
free(rBuf);
FUZZ_dataProducer_free(producer);
#ifndef STATEFUL_FUZZING
ZSTD_freeCCtx(cctx); cctx = NULL;
#endif
return 0;
}
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