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9f95a23c | 1 | /* |
f67539c2 | 2 | * Copyright (c) 2016-2020, Facebook, Inc. |
9f95a23c TL |
3 | * All rights reserved. |
4 | * | |
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). | |
f67539c2 | 8 | * You may select, at your option, one of the above-listed licenses. |
9f95a23c TL |
9 | */ |
10 | ||
11 | /** | |
12 | * This fuzz target attempts to decompress the fuzzed data with the dictionary | |
13 | * decompression function to ensure the decompressor never crashes. It does not | |
14 | * fuzz the dictionary. | |
15 | */ | |
16 | ||
17 | #include <stddef.h> | |
18 | #include <stdlib.h> | |
19 | #include <stdio.h> | |
20 | #include "fuzz_helpers.h" | |
21 | #include "zstd_helpers.h" | |
f67539c2 | 22 | #include "fuzz_data_producer.h" |
9f95a23c TL |
23 | |
24 | static ZSTD_DCtx *dctx = NULL; | |
9f95a23c TL |
25 | |
26 | int LLVMFuzzerTestOneInput(const uint8_t *src, size_t size) | |
27 | { | |
f67539c2 TL |
28 | /* Give a random portion of src data to the producer, to use for |
29 | parameter generation. The rest will be used for (de)compression */ | |
30 | FUZZ_dataProducer_t *producer = FUZZ_dataProducer_create(src, size); | |
31 | size = FUZZ_dataProducer_reserveDataPrefix(producer); | |
9f95a23c | 32 | |
f67539c2 TL |
33 | FUZZ_dict_t dict; |
34 | ZSTD_DDict* ddict = NULL; | |
9f95a23c | 35 | |
9f95a23c TL |
36 | if (!dctx) { |
37 | dctx = ZSTD_createDCtx(); | |
38 | FUZZ_ASSERT(dctx); | |
39 | } | |
f67539c2 TL |
40 | dict = FUZZ_train(src, size, producer); |
41 | if (FUZZ_dataProducer_uint32Range(producer, 0, 1) == 0) { | |
42 | ddict = ZSTD_createDDict(dict.buff, dict.size); | |
43 | FUZZ_ASSERT(ddict); | |
9f95a23c | 44 | } else { |
f67539c2 TL |
45 | if (FUZZ_dataProducer_uint32Range(producer, 0, 1) == 0) |
46 | FUZZ_ZASSERT(ZSTD_DCtx_loadDictionary_advanced( | |
9f95a23c | 47 | dctx, dict.buff, dict.size, |
f67539c2 TL |
48 | (ZSTD_dictLoadMethod_e)FUZZ_dataProducer_uint32Range(producer, 0, 1), |
49 | (ZSTD_dictContentType_e)FUZZ_dataProducer_uint32Range(producer, 0, 2))); | |
50 | else | |
51 | FUZZ_ZASSERT(ZSTD_DCtx_refPrefix_advanced( | |
52 | dctx, dict.buff, dict.size, | |
53 | (ZSTD_dictContentType_e)FUZZ_dataProducer_uint32Range(producer, 0, 2))); | |
9f95a23c TL |
54 | } |
55 | ||
f67539c2 TL |
56 | { |
57 | size_t const bufSize = FUZZ_dataProducer_uint32Range(producer, 0, 10 * size); | |
58 | void* rBuf = FUZZ_malloc(bufSize); | |
59 | if (ddict) { | |
60 | ZSTD_decompress_usingDDict(dctx, rBuf, bufSize, src, size, ddict); | |
61 | } else { | |
62 | ZSTD_decompressDCtx(dctx, rBuf, bufSize, src, size); | |
63 | } | |
64 | free(rBuf); | |
65 | } | |
9f95a23c | 66 | free(dict.buff); |
f67539c2 TL |
67 | FUZZ_dataProducer_free(producer); |
68 | ZSTD_freeDDict(ddict); | |
9f95a23c TL |
69 | #ifndef STATEFUL_FUZZING |
70 | ZSTD_freeDCtx(dctx); dctx = NULL; | |
71 | #endif | |
72 | return 0; | |
73 | } |