1 /*
2 * Copyright (c) Facebook, Inc.
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 #define HUF_STATIC_LINKING_ONLY
17
18 #include <stddef.h>
19 #include <stdlib.h>
20 #include <stdio.h>
21 #include <string.h>
22 #include "common/cpu.h"
23 #include "common/huf.h"
24 #include "fuzz_helpers.h"
25 #include "fuzz_data_producer.h"
26
LLVMFuzzerTestOneInput(const uint8_t * src,size_t size)27 int LLVMFuzzerTestOneInput(const uint8_t *src, size_t size)
28 {
29 FUZZ_dataProducer_t *producer = FUZZ_dataProducer_create(src, size);
30 /* Select random parameters: #streams, X1 or X2 decoding, bmi2 */
31 int const streams = FUZZ_dataProducer_int32Range(producer, 0, 1);
32 int const symbols = FUZZ_dataProducer_int32Range(producer, 0, 1);
33 int const bmi2 = ZSTD_cpuid_bmi2(ZSTD_cpuid()) && FUZZ_dataProducer_int32Range(producer, 0, 1);
34 /* Select a random cBufSize - it may be too small */
35 size_t const dBufSize = FUZZ_dataProducer_uint32Range(producer, 0, 8 * size + 500);
36 size_t const maxTableLog = FUZZ_dataProducer_uint32Range(producer, 1, HUF_TABLELOG_MAX);
37 HUF_DTable* dt = (HUF_DTable*)FUZZ_malloc(HUF_DTABLE_SIZE(maxTableLog) * sizeof(HUF_DTable));
38 size_t const wkspSize = HUF_WORKSPACE_SIZE;
39 void* wksp = FUZZ_malloc(wkspSize);
40 void* dBuf = FUZZ_malloc(dBufSize);
41 dt[0] = maxTableLog * 0x01000001;
42 size = FUZZ_dataProducer_remainingBytes(producer);
43
44 if (symbols == 0) {
45 size_t const err = HUF_readDTableX1_wksp_bmi2(dt, src, size, wksp, wkspSize, bmi2);
46 if (ZSTD_isError(err))
47 goto _out;
48 } else {
49 size_t const err = HUF_readDTableX2_wksp_bmi2(dt, src, size, wksp, wkspSize, bmi2);
50 if (ZSTD_isError(err))
51 goto _out;
52 }
53 if (streams == 0)
54 HUF_decompress1X_usingDTable_bmi2(dBuf, dBufSize, src, size, dt, bmi2);
55 else
56 HUF_decompress4X_usingDTable_bmi2(dBuf, dBufSize, src, size, dt, bmi2);
57
58 _out:
59 free(dt);
60 free(wksp);
61 free(dBuf);
62 FUZZ_dataProducer_free(producer);
63 return 0;
64 }
65