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 compress the fuzzed data with the simple |
13 | * compression function with an output buffer that may be too small to |
14 | * ensure that the compressor never crashes. |
15 | */ |
16 | |
17 | #include <stddef.h> |
18 | #include <stdlib.h> |
19 | #include <stdio.h> |
20 | #include "fuzz_helpers.h" |
21 | #include "zstd.h" |
22 | #include "zstd_errors.h" |
23 | #include "zstd_helpers.h" |
24 | #include "fuzz_data_producer.h" |
25 | #include "fuzz_third_party_seq_prod.h" |
26 | |
27 | static ZSTD_CCtx *cctx = NULL; |
28 | |
29 | int LLVMFuzzerTestOneInput(const uint8_t *src, size_t size) |
30 | { |
31 | FUZZ_SEQ_PROD_SETUP(); |
32 | |
33 | /* Give a random portion of src data to the producer, to use for |
34 | parameter generation. The rest will be used for (de)compression */ |
35 | FUZZ_dataProducer_t *producer = FUZZ_dataProducer_create(src, size); |
36 | size = FUZZ_dataProducer_reserveDataPrefix(producer); |
37 | |
38 | size_t const maxSize = ZSTD_compressBound(size); |
39 | size_t const bufSize = FUZZ_dataProducer_uint32Range(producer, 0, maxSize); |
40 | |
41 | int const cLevel = FUZZ_dataProducer_int32Range(producer, kMinClevel, kMaxClevel); |
42 | |
43 | if (!cctx) { |
44 | cctx = ZSTD_createCCtx(); |
45 | FUZZ_ASSERT(cctx); |
46 | } |
47 | |
48 | void *rBuf = FUZZ_malloc(bufSize); |
49 | size_t const ret = ZSTD_compressCCtx(cctx, rBuf, bufSize, src, size, cLevel); |
50 | if (ZSTD_isError(ret)) { |
51 | FUZZ_ASSERT(ZSTD_getErrorCode(ret) == ZSTD_error_dstSize_tooSmall); |
52 | } |
53 | free(rBuf); |
54 | FUZZ_dataProducer_free(producer); |
55 | #ifndef STATEFUL_FUZZING |
56 | ZSTD_freeCCtx(cctx); cctx = NULL; |
57 | #endif |
58 | FUZZ_SEQ_PROD_TEARDOWN(); |
59 | return 0; |
60 | } |