1 /* Copyright (C) 2019 Mozilla Foundation.
2 File: decode_fuzzer.cc
3
4 Redistribution and use in source and binary forms, with or without
5 modification, are permitted provided that the following conditions
6 are met:
7
8 - Redistributions of source code must retain the above copyright
9 notice, this list of conditions and the following disclaimer.
10
11 - Redistributions in binary form must reproduce the above copyright
12 notice, this list of conditions and the following disclaimer in the
13 documentation and/or other materials provided with the distribution.
14
15 - Neither the name of the Xiph.org Foundation nor the names of its
16 contributors may be used to endorse or promote products derived from
17 this software without specific prior written permission.
18
19 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
23 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
26 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
27 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
28 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
29 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31 /* This based on decode_fuzzer.cc used with Vorbis.
32 https://git.xiph.org/?p=vorbis.git;a=blob;f=contrib/oss-fuzz/decode_fuzzer.cc;hb=HEAD
33 */
34
35 #include <stdio.h>
36 #include <string.h>
37 #include <cstdint>
38 #include "ivorbisfile.h"
39
40 #define INPUT_LIMIT 16384
41
42 struct vorbis_data {
43 const uint8_t *current;
44 const uint8_t *data;
45 size_t size;
46 };
47
read_func(void * ptr,size_t size1,size_t size2,void * datasource)48 size_t read_func(void *ptr, size_t size1, size_t size2, void *datasource) {
49 vorbis_data* vd = (vorbis_data *)(datasource);
50 size_t len = size1 * size2;
51 if (vd->current + len > vd->data + vd->size) {
52 len = vd->data + vd->size - vd->current;
53 }
54 memcpy(ptr, vd->current, len);
55 vd->current += len;
56 return len;
57 }
58
LLVMFuzzerTestOneInput(const uint8_t * Data,size_t Size)59 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
60 ov_callbacks memory_callbacks = {0};
61 memory_callbacks.read_func = read_func;
62 vorbis_data data_st;
63 data_st.size = Size > INPUT_LIMIT ? INPUT_LIMIT : Size;
64 data_st.current = Data;
65 data_st.data = Data;
66 OggVorbis_File vf;
67 int result = ov_open_callbacks(&data_st, &vf, NULL, 0, memory_callbacks);
68 if (result < 0) {
69 return 0;
70 }
71 int current_section = 0;
72 char pcm[4096];
73 long read_result;
74 while (true) {
75 read_result = ov_read(&vf, pcm, sizeof(pcm), ¤t_section);
76 if (read_result <= 0 && read_result != OV_HOLE) {
77 break;
78 }
79 }
80 ov_clear(&vf);
81 return 0;
82 }
83