1 /* @generated by `generate-fortify-tests.lua "random"` */
2
3 #define _FORTIFY_SOURCE 2
4 #define TMPFILE_SIZE (1024 * 32)
5
6 #include <sys/param.h>
7 #include <sys/random.h>
8 #include <sys/resource.h>
9 #include <sys/select.h>
10 #include <sys/socket.h>
11 #include <sys/time.h>
12 #include <sys/uio.h>
13 #include <sys/wait.h>
14 #include <dirent.h>
15 #include <errno.h>
16 #include <fcntl.h>
17 #include <limits.h>
18 #include <poll.h>
19 #include <signal.h>
20 #include <stdio.h>
21 #include <stdlib.h>
22 #include <string.h>
23 #include <strings.h>
24 #include <sysexits.h>
25 #include <unistd.h>
26 #include <wchar.h>
27 #include <atf-c.h>
28
29 static FILE * __unused
new_fp(size_t __len)30 new_fp(size_t __len)
31 {
32 static char fpbuf[LINE_MAX];
33 FILE *fp;
34
35 ATF_REQUIRE(__len <= sizeof(fpbuf));
36
37 memset(fpbuf, 'A', sizeof(fpbuf) - 1);
38 fpbuf[sizeof(fpbuf) - 1] = '\0';
39
40 fp = fmemopen(fpbuf, sizeof(fpbuf), "rb");
41 ATF_REQUIRE(fp != NULL);
42
43 return (fp);
44 }
45
46 /*
47 * Create a new symlink to use for readlink(2) style tests, we'll just use a
48 * random target name to have something interesting to look at.
49 */
50 static const char * __unused
new_symlink(size_t __len)51 new_symlink(size_t __len)
52 {
53 static const char linkname[] = "link";
54 char target[MAXNAMLEN];
55 int error;
56
57 ATF_REQUIRE(__len <= sizeof(target));
58
59 arc4random_buf(target, sizeof(target));
60
61 error = unlink(linkname);
62 ATF_REQUIRE(error == 0 || errno == ENOENT);
63
64 error = symlink(target, linkname);
65 ATF_REQUIRE(error == 0);
66
67 return (linkname);
68 }
69
70 /*
71 * For our purposes, first descriptor will be the reader; we'll send both
72 * raw data and a control message over it so that the result can be used for
73 * any of our recv*() tests.
74 */
75 static void __unused
new_socket(int sock[2])76 new_socket(int sock[2])
77 {
78 unsigned char ctrl[CMSG_SPACE(sizeof(int))] = { 0 };
79 static char sockbuf[256];
80 ssize_t rv;
81 size_t total = 0;
82 struct msghdr hdr = { 0 };
83 struct cmsghdr *cmsg;
84 int error, fd;
85
86 error = socketpair(AF_UNIX, SOCK_STREAM, 0, sock);
87 ATF_REQUIRE(error == 0);
88
89 while (total != sizeof(sockbuf)) {
90 rv = send(sock[1], &sockbuf[total], sizeof(sockbuf) - total, 0);
91
92 ATF_REQUIRE_MSG(rv > 0,
93 "expected bytes sent, got %zd with %zu left (size %zu, total %zu)",
94 rv, sizeof(sockbuf) - total, sizeof(sockbuf), total);
95 ATF_REQUIRE_MSG(total + (size_t)rv <= sizeof(sockbuf),
96 "%zd exceeds total %zu", rv, sizeof(sockbuf));
97 total += rv;
98 }
99
100 hdr.msg_control = ctrl;
101 hdr.msg_controllen = sizeof(ctrl);
102
103 cmsg = CMSG_FIRSTHDR(&hdr);
104 cmsg->cmsg_level = SOL_SOCKET;
105 cmsg->cmsg_type = SCM_RIGHTS;
106 cmsg->cmsg_len = CMSG_LEN(sizeof(fd));
107 fd = STDIN_FILENO;
108 memcpy(CMSG_DATA(cmsg), &fd, sizeof(fd));
109
110 error = sendmsg(sock[1], &hdr, 0);
111 ATF_REQUIRE(error != -1);
112 }
113
114 /*
115 * Constructs a tmpfile that we can use for testing read(2) and friends.
116 */
117 static int __unused
new_tmpfile(void)118 new_tmpfile(void)
119 {
120 char buf[1024];
121 ssize_t rv;
122 size_t written;
123 int fd;
124
125 fd = open("tmpfile", O_RDWR | O_CREAT | O_TRUNC, 0644);
126 ATF_REQUIRE(fd >= 0);
127
128 written = 0;
129 while (written < TMPFILE_SIZE) {
130 rv = write(fd, buf, sizeof(buf));
131 ATF_REQUIRE(rv > 0);
132
133 written += rv;
134 }
135
136 ATF_REQUIRE_EQ(0, lseek(fd, 0, SEEK_SET));
137 return (fd);
138 }
139
140 static void
disable_coredumps(void)141 disable_coredumps(void)
142 {
143 struct rlimit rl = { 0 };
144
145 if (setrlimit(RLIMIT_CORE, &rl) == -1)
146 _exit(EX_OSERR);
147 }
148
149 /*
150 * Replaces stdin with a file that we can actually read from, for tests where
151 * we want a FILE * or fd that we can get data from.
152 */
153 static void __unused
replace_stdin(void)154 replace_stdin(void)
155 {
156 int fd;
157
158 fd = new_tmpfile();
159
160 (void)dup2(fd, STDIN_FILENO);
161 if (fd != STDIN_FILENO)
162 close(fd);
163 }
164
165 ATF_TC_WITHOUT_HEAD(getrandom_before_end);
ATF_TC_BODY(getrandom_before_end,tc)166 ATF_TC_BODY(getrandom_before_end, tc)
167 {
168 #define BUF &__stack.__buf
169 struct {
170 uint8_t padding_l;
171 unsigned char __buf[42];
172 uint8_t padding_r;
173 } __stack;
174 const size_t __bufsz __unused = sizeof(__stack.__buf);
175 const size_t __len = 42 - 1;
176 const size_t __idx __unused = __len - 1;
177
178 getrandom(__stack.__buf, __len, 0);
179 #undef BUF
180
181 }
182
183 ATF_TC_WITHOUT_HEAD(getrandom_end);
ATF_TC_BODY(getrandom_end,tc)184 ATF_TC_BODY(getrandom_end, tc)
185 {
186 #define BUF &__stack.__buf
187 struct {
188 uint8_t padding_l;
189 unsigned char __buf[42];
190 uint8_t padding_r;
191 } __stack;
192 const size_t __bufsz __unused = sizeof(__stack.__buf);
193 const size_t __len = 42;
194 const size_t __idx __unused = __len - 1;
195
196 getrandom(__stack.__buf, __len, 0);
197 #undef BUF
198
199 }
200
201 ATF_TC_WITHOUT_HEAD(getrandom_heap_before_end);
ATF_TC_BODY(getrandom_heap_before_end,tc)202 ATF_TC_BODY(getrandom_heap_before_end, tc)
203 {
204 #define BUF __stack.__buf
205 struct {
206 uint8_t padding_l;
207 unsigned char * __buf;
208 uint8_t padding_r;
209 } __stack;
210 const size_t __bufsz __unused = sizeof(*__stack.__buf) * (42);
211 const size_t __len = 42 - 1;
212 const size_t __idx __unused = __len - 1;
213
214 __stack.__buf = malloc(__bufsz);
215
216 getrandom(__stack.__buf, __len, 0);
217 #undef BUF
218
219 }
220
221 ATF_TC_WITHOUT_HEAD(getrandom_heap_end);
ATF_TC_BODY(getrandom_heap_end,tc)222 ATF_TC_BODY(getrandom_heap_end, tc)
223 {
224 #define BUF __stack.__buf
225 struct {
226 uint8_t padding_l;
227 unsigned char * __buf;
228 uint8_t padding_r;
229 } __stack;
230 const size_t __bufsz __unused = sizeof(*__stack.__buf) * (42);
231 const size_t __len = 42;
232 const size_t __idx __unused = __len - 1;
233
234 __stack.__buf = malloc(__bufsz);
235
236 getrandom(__stack.__buf, __len, 0);
237 #undef BUF
238
239 }
240
241 ATF_TC_WITHOUT_HEAD(getrandom_heap_after_end);
ATF_TC_BODY(getrandom_heap_after_end,tc)242 ATF_TC_BODY(getrandom_heap_after_end, tc)
243 {
244 #define BUF __stack.__buf
245 struct {
246 uint8_t padding_l;
247 unsigned char * __buf;
248 uint8_t padding_r;
249 } __stack;
250 const size_t __bufsz __unused = sizeof(*__stack.__buf) * (42);
251 const size_t __len = 42 + 1;
252 const size_t __idx __unused = __len - 1;
253 pid_t __child;
254 int __status;
255
256 __child = fork();
257 ATF_REQUIRE(__child >= 0);
258 if (__child > 0)
259 goto monitor;
260
261 /* Child */
262 disable_coredumps();
263 __stack.__buf = malloc(__bufsz);
264
265 getrandom(__stack.__buf, __len, 0);
266 _exit(EX_SOFTWARE); /* Should have aborted. */
267
268 monitor:
269 while (waitpid(__child, &__status, 0) != __child) {
270 ATF_REQUIRE_EQ(EINTR, errno);
271 }
272
273 if (!WIFSIGNALED(__status)) {
274 switch (WEXITSTATUS(__status)) {
275 case EX_SOFTWARE:
276 atf_tc_fail("FORTIFY_SOURCE failed to abort");
277 break;
278 case EX_OSERR:
279 atf_tc_fail("setrlimit(2) failed");
280 break;
281 default:
282 atf_tc_fail("child exited with status %d",
283 WEXITSTATUS(__status));
284 }
285 } else {
286 ATF_REQUIRE_EQ(SIGABRT, WTERMSIG(__status));
287 }
288 #undef BUF
289
290 }
291
ATF_TP_ADD_TCS(tp)292 ATF_TP_ADD_TCS(tp)
293 {
294 ATF_TP_ADD_TC(tp, getrandom_before_end);
295 ATF_TP_ADD_TC(tp, getrandom_end);
296 ATF_TP_ADD_TC(tp, getrandom_heap_before_end);
297 ATF_TP_ADD_TC(tp, getrandom_heap_end);
298 ATF_TP_ADD_TC(tp, getrandom_heap_after_end);
299 return (atf_no_error());
300 }
301