xref: /freebsd/tools/regression/priv/priv_vm_madv_protect.c (revision 282a3889ebf826db9839be296ff1dd903f6d6d6e)
1 /*-
2  * Copyright (c) 2006 nCircle Network Security, Inc.
3  * All rights reserved.
4  *
5  * This software was developed by Robert N. M. Watson for the TrustedBSD
6  * Project under contract to nCircle Network Security, Inc.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR, NCIRCLE NETWORK SECURITY,
21  * INC., OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
23  * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
24  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
25  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
26  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
27  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28  *
29  * $FreeBSD$
30  */
31 
32 /*
33  * Test that madvise(..., MADV_PROTECT) requires privilege by running it first
34  * with privilege, then again without.
35  */
36 
37 #include <sys/types.h>
38 #include <sys/mman.h>
39 
40 #include <err.h>
41 #include <errno.h>
42 #include <unistd.h>
43 
44 #include "main.h"
45 
46 void
47 priv_vm_madv_protect(void)
48 {
49 	int error;
50 
51 	assert_root();
52 
53 	error = madvise(NULL, 0, MADV_PROTECT);
54 	if (error)
55 		err(-1, "madvise(..., MADV_PROTECT) as root");
56 
57 	set_euid(UID_OTHER);
58 
59 	error = madvise(NULL, 0, MADV_PROTECT);
60 	if (error == 0)
61 		errx(-1, "mlock as !root succeeded");
62 	if (errno != EPERM)
63 		err(-1, "mlock as !root wrong errno %d", errno);
64 }
65