104 lines
3.2 KiB
C
104 lines
3.2 KiB
C
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/**
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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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 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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#define ZSTD_STATIC_LINKING_ONLY
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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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#include "zstd_helpers.h"
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#include "fuzz_data_producer.h"
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#include "fuzz_third_party_seq_prod.h"
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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 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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int cLevel)
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{
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ZSTD_parameters const params = ZSTD_getParams(cLevel, srcSize, 0);
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size_t ret = ZSTD_compressBegin_advanced(cctx, NULL, 0, params, srcSize);
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FUZZ_ZASSERT(ret);
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ret = ZSTD_compressBlock(cctx, compressed, compressedCapacity, src, srcSize);
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FUZZ_ZASSERT(ret);
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if (ret == 0) {
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FUZZ_ASSERT(resultCapacity >= srcSize);
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if (srcSize > 0) {
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memcpy(result, src, srcSize);
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}
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return srcSize;
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}
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ZSTD_decompressBegin(dctx);
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return ZSTD_decompressBlock(dctx, result, resultCapacity, compressed, ret);
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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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FUZZ_SEQ_PROD_SETUP();
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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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int const cLevel = FUZZ_dataProducer_int32Range(producer, kMinClevel, kMaxClevel);
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size_t neededBufSize = size;
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if (size > ZSTD_BLOCKSIZE_MAX)
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size = ZSTD_BLOCKSIZE_MAX;
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/* Allocate all buffers and contexts if not already allocated */
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if (neededBufSize > bufSize || !cBuf || !rBuf) {
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free(cBuf);
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free(rBuf);
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cBuf = FUZZ_malloc(neededBufSize);
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rBuf = FUZZ_malloc(neededBufSize);
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bufSize = neededBufSize;
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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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cLevel);
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FUZZ_ZASSERT(result);
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FUZZ_ASSERT_MSG(result == size, "Incorrect regenerated size");
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FUZZ_ASSERT_MSG(!FUZZ_memcmp(src, rBuf, size), "Corruption!");
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}
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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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ZSTD_freeDCtx(dctx); dctx = NULL;
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#endif
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FUZZ_SEQ_PROD_TEARDOWN();
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return 0;
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}
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