648db22b |
1 | /* |
2 | * Copyright (c) Meta Platforms, Inc. and affiliates. |
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). |
8 | * You may select, at your option, one of the above-listed licenses. |
9 | */ |
10 | |
11 | /** |
12 | * This fuzz target attempts to decompress the fuzzed data with the simple |
13 | * decompression function to ensure the decompressor never crashes. |
14 | */ |
15 | |
16 | #include <stddef.h> |
17 | #include <stdlib.h> |
18 | #include <stdio.h> |
19 | #include "fuzz_helpers.h" |
20 | #include "zstd.h" |
21 | #include "fuzz_data_producer.h" |
22 | |
23 | static ZSTD_DCtx *dctx = NULL; |
24 | |
25 | int LLVMFuzzerTestOneInput(const uint8_t *src, size_t size) |
26 | { |
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); |
31 | |
32 | if (!dctx) { |
33 | dctx = ZSTD_createDCtx(); |
34 | FUZZ_ASSERT(dctx); |
35 | } |
36 | |
37 | size_t const bufSize = FUZZ_dataProducer_uint32Range(producer, 0, 10 * size); |
38 | void *rBuf = FUZZ_malloc(bufSize); |
39 | |
40 | ZSTD_decompressDCtx(dctx, rBuf, bufSize, src, size); |
41 | free(rBuf); |
42 | |
43 | FUZZ_dataProducer_free(producer); |
44 | |
45 | #ifndef STATEFUL_FUZZING |
46 | ZSTD_freeDCtx(dctx); dctx = NULL; |
47 | #endif |
48 | return 0; |
49 | } |