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 performs a zstd round-trip test (compress & decompress), |
13 | * compares the result with the original, and calls abort() on corruption. |
14 | */ |
15 | |
16 | #include <stddef.h> |
17 | #include <stdlib.h> |
18 | #include <stdio.h> |
19 | #include <string.h> |
20 | #include "common/cpu.h" |
21 | #include "common/huf.h" |
22 | #include "fuzz_helpers.h" |
23 | #include "fuzz_data_producer.h" |
24 | |
25 | int LLVMFuzzerTestOneInput(const uint8_t *src, size_t size) |
26 | { |
27 | FUZZ_dataProducer_t *producer = FUZZ_dataProducer_create(src, size); |
28 | /* Select random parameters: #streams, X1 or X2 decoding, bmi2 */ |
29 | int const streams = FUZZ_dataProducer_int32Range(producer, 0, 1); |
30 | int const symbols = FUZZ_dataProducer_int32Range(producer, 0, 1); |
31 | int const flags = 0 |
32 | | (ZSTD_cpuid_bmi2(ZSTD_cpuid()) && FUZZ_dataProducer_int32Range(producer, 0, 1) ? HUF_flags_bmi2 : 0) |
33 | | (FUZZ_dataProducer_int32Range(producer, 0, 1) ? HUF_flags_optimalDepth : 0) |
34 | | (FUZZ_dataProducer_int32Range(producer, 0, 1) ? HUF_flags_preferRepeat : 0) |
35 | | (FUZZ_dataProducer_int32Range(producer, 0, 1) ? HUF_flags_suspectUncompressible : 0) |
36 | | (FUZZ_dataProducer_int32Range(producer, 0, 1) ? HUF_flags_disableAsm : 0) |
37 | | (FUZZ_dataProducer_int32Range(producer, 0, 1) ? HUF_flags_disableFast : 0); |
38 | /* Select a random cBufSize - it may be too small */ |
39 | size_t const dBufSize = FUZZ_dataProducer_uint32Range(producer, 0, 8 * size + 500); |
40 | size_t const maxTableLog = FUZZ_dataProducer_uint32Range(producer, 1, HUF_TABLELOG_MAX); |
41 | HUF_DTable* dt = (HUF_DTable*)FUZZ_malloc(HUF_DTABLE_SIZE(maxTableLog) * sizeof(HUF_DTable)); |
42 | size_t const wkspSize = HUF_WORKSPACE_SIZE; |
43 | void* wksp = FUZZ_malloc(wkspSize); |
44 | void* dBuf = FUZZ_malloc(dBufSize); |
45 | dt[0] = maxTableLog * 0x01000001; |
46 | size = FUZZ_dataProducer_remainingBytes(producer); |
47 | |
48 | if (symbols == 0) { |
49 | size_t const err = HUF_readDTableX1_wksp(dt, src, size, wksp, wkspSize, flags); |
50 | if (ZSTD_isError(err)) |
51 | goto _out; |
52 | } else { |
53 | size_t const err = HUF_readDTableX2_wksp(dt, src, size, wksp, wkspSize, flags); |
54 | if (ZSTD_isError(err)) |
55 | goto _out; |
56 | } |
57 | if (streams == 0) |
58 | HUF_decompress1X_usingDTable(dBuf, dBufSize, src, size, dt, flags); |
59 | else |
60 | HUF_decompress4X_usingDTable(dBuf, dBufSize, src, size, dt, flags); |
61 | |
62 | _out: |
63 | free(dt); |
64 | free(wksp); |
65 | free(dBuf); |
66 | FUZZ_dataProducer_free(producer); |
67 | return 0; |
68 | } |