2 * Copyright (c) 2016-present, Facebook, Inc.
5 * This source code is licensed under both the BSD-style license (found in the
6 * LICENSE file in the root directory of this source tree) and the GPLv2 (found
7 * in the COPYING file in the root directory of this source tree).
11 * This fuzz target attempts to decompress the fuzzed data with the dictionary
12 * decompression function to ensure the decompressor never crashes. It does not
13 * fuzz the dictionary.
19 #include "fuzz_helpers.h"
20 #include "zstd_helpers.h"
21 #include "fuzz_data_producer.h"
23 static ZSTD_DCtx *dctx = NULL;
25 int LLVMFuzzerTestOneInput(const uint8_t *src, size_t size)
27 /* Give a random portion of src data to the producer, to use for
28 parameter generation. The rest will be used for (de)compression */
29 FUZZ_dataProducer_t *producer = FUZZ_dataProducer_create(src, size);
30 size = FUZZ_dataProducer_reserveDataPrefix(producer);
33 ZSTD_DDict* ddict = NULL;
36 dctx = ZSTD_createDCtx();
39 dict = FUZZ_train(src, size, producer);
40 if (FUZZ_dataProducer_uint32Range(producer, 0, 1) == 0) {
41 ddict = ZSTD_createDDict(dict.buff, dict.size);
44 FUZZ_ZASSERT(ZSTD_DCtx_loadDictionary_advanced(
45 dctx, dict.buff, dict.size,
46 (ZSTD_dictLoadMethod_e)FUZZ_dataProducer_uint32Range(producer, 0, 1),
47 (ZSTD_dictContentType_e)FUZZ_dataProducer_uint32Range(producer, 0, 2)));
51 size_t const bufSize = FUZZ_dataProducer_uint32Range(producer, 0, 10 * size);
52 void* rBuf = malloc(bufSize);
55 ZSTD_decompress_usingDDict(dctx, rBuf, bufSize, src, size, ddict);
57 ZSTD_decompressDCtx(dctx, rBuf, bufSize, src, size);
62 FUZZ_dataProducer_free(producer);
63 ZSTD_freeDDict(ddict);
64 #ifndef STATEFUL_FUZZING
65 ZSTD_freeDCtx(dctx); dctx = NULL;