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57 lines
1.8 KiB
57 lines
1.8 KiB
/*
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* Copyright (c) 2016-2020, 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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* 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 comprss the fuzzed data with the simple
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* compression function with an output buffer that may be too small to
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* ensure that the compressor 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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#include "fuzz_helpers.h"
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#include "zstd.h"
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#include "zstd_errors.h"
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#include "zstd_helpers.h"
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#include "fuzz_data_producer.h"
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static ZSTD_CCtx *cctx = 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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size_t const maxSize = ZSTD_compressBound(size);
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size_t const bufSize = FUZZ_dataProducer_uint32Range(producer, 0, maxSize);
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int const cLevel = FUZZ_dataProducer_int32Range(producer, kMinClevel, kMaxClevel);
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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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void *rBuf = FUZZ_malloc(bufSize);
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size_t const ret = ZSTD_compressCCtx(cctx, rBuf, bufSize, src, size, cLevel);
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if (ZSTD_isError(ret)) {
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FUZZ_ASSERT(ZSTD_getErrorCode(ret) == ZSTD_error_dstSize_tooSmall);
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}
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free(rBuf);
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FUZZ_dataProducer_free(producer);
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#ifndef STATEFUL_FUZZING
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ZSTD_freeCCtx(cctx); cctx = NULL;
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#endif
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return 0;
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}
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