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
126
127
128
129
130
131
132
133
|
/*
* SPDX-License-Identifier: ISC
*
* Copyright (c) 2021 Todd C. Miller <Todd.Miller@sudo.ws>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* This is an open source non-commercial project. Dear PVS-Studio, please check it.
* PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
*/
#include <config.h>
#include <sys/stat.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <limits.h>
#include <fcntl.h>
#include <time.h>
#include <unistd.h>
#if defined(HAVE_STDINT_H)
# include <stdint.h>
#elif defined(HAVE_INTTYPES_H)
# include <inttypes.h>
#endif
#include <sudo_compat.h>
#include <sudo_util.h>
int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size);
sudo_dso_public int main(int argc, char *argv[]);
/*
* Simple driver for fuzzers built for LLVM libfuzzer.
* This stub library allows fuzz targets to be built and run without
* libfuzzer. No actual fuzzing will occur but the provided inputs
* will be tested.
*/
int
main(int argc, char *argv[])
{
struct timespec start_time, stop_time;
size_t filesize, bufsize = 0;
ssize_t nread;
struct stat sb;
uint8_t *buf = NULL;
int fd, i, errors = 0;
int verbose = 0;
long ms;
/* Test provided input files. */
for (i = 1; i < argc; i++) {
const char *arg = argv[i];
if (*arg == '-') {
if (strncmp(arg, "-verbosity=", sizeof("-verbosity=") - 1) == 0) {
verbose = atoi(arg + sizeof("-verbosity=") - 1);
}
continue;
}
fd = open(arg, O_RDONLY);
if (fd == -1 || fstat(fd, &sb) != 0) {
fprintf(stderr, "open %s: %s\n", arg, strerror(errno));
if (fd != -1)
close(fd);
errors++;
continue;
}
#ifndef __LP64__
if (sizeof(sb.st_size) > sizeof(size_t) && sb.st_size > SSIZE_MAX) {
errno = E2BIG;
fprintf(stderr, "%s: %s\n", arg, strerror(errno));
close(fd);
errors++;
continue;
}
#endif
filesize = (size_t)sb.st_size;
if (bufsize < filesize) {
void *tmp = realloc(buf, filesize);
if (tmp == NULL) {
fprintf(stderr, "realloc: %s\n", strerror(errno));
close(fd);
errors++;
continue;
}
buf = tmp;
bufsize = filesize;
}
nread = read(fd, buf, filesize);
if ((size_t)nread != filesize) {
if (nread < 0)
fprintf(stderr, "read %s: %s\n", arg, strerror(errno));
else
fprintf(stderr, "read %s: short read\n", arg);
close(fd);
errors++;
continue;
}
close(fd);
/* NOTE: doesn't support LLVMFuzzerInitialize() (but we don't use it) */
if (verbose > 0) {
fprintf(stderr, "Running: %s\n", arg);
sudo_gettime_mono(&start_time);
}
LLVMFuzzerTestOneInput(buf, (size_t)nread);
if (verbose > 0) {
sudo_gettime_mono(&stop_time);
sudo_timespecsub(&stop_time, &start_time, &stop_time);
ms = (stop_time.tv_sec * 1000) + (stop_time.tv_nsec / 1000000);
fprintf(stderr, "Executed %s in %ld ms\n", arg, ms);
}
}
free(buf);
return errors;
}
|
