1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
|
/* Fuzz testing target. */
/*
* Copyright (c) 2019,2020 Genome Research Ltd.
* Author(s): James Bonfield
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* 3. Neither the names Genome Research Ltd and Wellcome Trust Sanger
* Institute nor the names of its contributors may be used to endorse
* or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY GENOME RESEARCH LTD AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GENOME RESEARCH
* LTD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
/*
For best results, configure, from a build subdir, to use the address and
undefined behaviour sanitizers, and run "make fuzz".
E.g.:
../configure CFLAGS='-g -gdwarf-2 -O3 -Wall -fsanitize=address,undefined' CPPFLAGS='-DUBSAN'
make fuzz
Run with:
export ASAN_OPTIONS=allow_addr2line=1
export UBSAN_OPTION=halt_on_error=1
tests/rANS_static_fuzz corpus
or
tests/rANS_static_fuzz -detect_leaks=0 corpus
I generated corpus as a whole bunch of precompressed tiny inputs from
tests/dat/q4 for different compression modes.
For debugging purposes, we can compile a non-fuzzer non-ASAN build using
-DNOFUZZ which creates a binary we can debug on any libfuzzer generated
output using valgrind. (The rans4x8 command line test won't quite work as
it's a slightly different input format with explicit sizes in the binary
stream.)
*/
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <assert.h>
#include <string.h>
#include <sys/time.h>
#include "htscodecs/rANS_static.h"
int LLVMFuzzerTestOneInput(uint8_t *in, size_t in_size) {
unsigned int uncomp_size;
unsigned char *uncomp = rans_uncompress(in, in_size, &uncomp_size);
if (uncomp)
free(uncomp);
return 0;
}
#ifdef NOFUZZ
#include <stdio.h>
#include <fcntl.h>
#include <errno.h>
#define BS 1024*1024
static unsigned char *load(char *fn, uint64_t *lenp) {
unsigned char *data = NULL;
uint64_t dsize = 0;
uint64_t dcurr = 0;
signed int len;
int fd = open(fn, O_RDONLY);
do {
if (dsize - dcurr < BS) {
dsize = dsize ? dsize * 2 : BS;
data = realloc(data, dsize);
}
len = read(fd, data + dcurr, BS);
if (len > 0)
dcurr += len;
} while (len > 0);
if (len == -1) {
perror("read");
}
close(fd);
*lenp = dcurr;
return data;
}
int main(int argc, char **argv) {
uint64_t in_size;
unsigned char *in = load(argv[1], &in_size);
unsigned int uncomp_size;
unsigned char *uncomp = rans_uncompress(in, in_size, &uncomp_size);
if (uncomp)
free(uncomp);
free(in);
return 0;
}
#endif
|
