1 /* Test to verify that overlong hostname is rejected by clnt_create
2 and doesn't cause a buffer overflow (bug 22542).
3
4 Copyright (C) 2022 Free Software Foundation, Inc.
5 This file is part of the GNU C Library.
6
7 The GNU C Library is free software; you can redistribute it and/or
8 modify it under the terms of the GNU Lesser General Public
9 License as published by the Free Software Foundation; either
10 version 2.1 of the License, or (at your option) any later version.
11
12 The GNU C Library is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Lesser General Public License for more details.
16
17 You should have received a copy of the GNU Lesser General Public
18 License along with the GNU C Library; if not, see
19 <http://www.gnu.org/licenses/>. */
20
21 #include <errno.h>
22 #include <rpc/clnt.h>
23 #include <string.h>
24 #include <support/check.h>
25 #include <sys/socket.h>
26 #include <sys/un.h>
27
28 static int
do_test(void)29 do_test (void)
30 {
31 /* Create an arbitrary hostname that's longer than fits in sun_path. */
32 char name [sizeof ((struct sockaddr_un*)0)->sun_path * 2];
33 memset (name, 'x', sizeof name - 1);
34 name [sizeof name - 1] = '\0';
35
36 errno = 0;
37 CLIENT *clnt = clnt_create (name, 0, 0, "unix");
38
39 TEST_VERIFY (clnt == NULL);
40 TEST_COMPARE (errno, EINVAL);
41 return 0;
42 }
43
44 #include <support/test-driver.c>
45