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 "fuzz_data_producer.h" |
17 | #define ZSTD_STATIC_LINKING_ONLY |
18 | |
19 | #include <stddef.h> |
20 | #include <stdlib.h> |
21 | #include <stdio.h> |
22 | #include "fuzz_helpers.h" |
23 | #include "zstd.h" |
24 | |
25 | static ZSTD_DCtx *dctx = NULL; |
26 | static void* rBuf = NULL; |
27 | static size_t bufSize = 0; |
28 | |
29 | int LLVMFuzzerTestOneInput(const uint8_t *src, size_t size) |
30 | { |
31 | size_t const neededBufSize = ZSTD_BLOCKSIZE_MAX; |
32 | FUZZ_dataProducer_t *producer = FUZZ_dataProducer_create(src, size); |
33 | |
34 | /* Allocate all buffers and contexts if not already allocated */ |
35 | if (neededBufSize > bufSize) { |
36 | free(rBuf); |
37 | rBuf = FUZZ_malloc_rand(neededBufSize, producer); |
38 | bufSize = neededBufSize; |
39 | } |
40 | if (!dctx) { |
41 | dctx = ZSTD_createDCtx(); |
42 | FUZZ_ASSERT(dctx); |
43 | } |
44 | ZSTD_decompressBegin(dctx); |
45 | ZSTD_decompressBlock(dctx, rBuf, neededBufSize, src, size); |
46 | |
47 | FUZZ_dataProducer_free(producer); |
48 | |
49 | #ifndef STATEFUL_FUZZING |
50 | ZSTD_freeDCtx(dctx); dctx = NULL; |
51 | #endif |
52 | return 0; |
53 | } |