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
|
/*
* 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.
*/
#include <config.h>
#include <sys/stat.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#if defined(HAVE_STDINT_H)
# include <stdint.h>
#elif defined(HAVE_INTTYPES_H)
# include <inttypes.h>
#endif
#ifdef HAVE_STDBOOL_H
# include <stdbool.h>
#else
# include <compat/stdbool.h>
#endif /* HAVE_STDBOOL_H */
#include <sudo_compat.h>
#include <sudo_debug.h>
#include <sudo_eventlog.h>
#include <sudo_fatal.h>
#include <sudo_iolog.h>
#include <sudo_plugin.h>
#include <sudo_util.h>
int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size);
static int
fuzz_conversation(int num_msgs, const struct sudo_conv_message msgs[],
struct sudo_conv_reply replies[], struct sudo_conv_callback *callback)
{
int n;
for (n = 0; n < num_msgs; n++) {
const struct sudo_conv_message *msg = &msgs[n];
switch (msg->msg_type & 0xff) {
case SUDO_CONV_PROMPT_ECHO_ON:
case SUDO_CONV_PROMPT_MASK:
case SUDO_CONV_PROMPT_ECHO_OFF:
/* input not supported */
return -1;
case SUDO_CONV_ERROR_MSG:
case SUDO_CONV_INFO_MSG:
/* no output for fuzzers */
break;
default:
return -1;
}
}
return 0;
}
int
LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
{
struct iolog_file iolog_file = { true };
struct timing_closure closure;
char logdir[] = "/tmp/timing.XXXXXX";
int dfd = -1, fd = -1;
initprogname("fuzz_iolog_timing");
if (getenv("SUDO_FUZZ_VERBOSE") == NULL)
sudo_warn_set_conversation(fuzz_conversation);
/* I/O logs consist of multiple files in a directory. */
if (mkdtemp(logdir) == NULL)
return 0;
/* Create a timing file from the supplied data. */
dfd = open(logdir, O_RDONLY);
if (dfd == -1)
goto cleanup;
fd = openat(dfd, "timing", O_WRONLY|O_CREAT|O_EXCL, S_IRWXU);
if (fd == -1)
goto cleanup;
if (write(fd, data, size) != (ssize_t)size)
goto cleanup;
close(fd);
fd = -1;
/* Open the timing file we wrote and try to parse it. */
if (!iolog_open(&iolog_file, dfd, IOFD_TIMING, "r"))
goto cleanup;
memset(&closure, 0, sizeof(closure));
closure.decimal = ".";
for (;;) {
if (iolog_read_timing_record(&iolog_file, &closure) != 0)
break;
}
iolog_close(&iolog_file, NULL);
cleanup:
if (dfd != -1) {
if (fd != -1)
close(fd);
unlinkat(dfd, "timing", 0);
close(dfd);
}
rmdir(logdir);
fflush(stdout);
return 0;
}
/* STUB */
bool
iolog_swapids(bool restore)
{
return false;
}
|
