1 /*
2 * Check decoding of seccomp SECCOMP_SET_MODE_FILTER.
3 *
4 * Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 #include "tests.h"
31
32 #include <stdio.h>
33 #include <asm/unistd.h>
34 #include <unistd.h>
35
36 #ifdef HAVE_LINUX_SECCOMP_H
37 # include <linux/seccomp.h>
38 #endif
39 #ifdef HAVE_LINUX_FILTER_H
40 # include <linux/filter.h>
41 #endif
42
43 #if defined __NR_seccomp && defined SECCOMP_SET_MODE_FILTER
44
45 # define N 7
46
47 int
main(void)48 main(void)
49 {
50 struct sock_filter *const filter = tail_alloc(sizeof(*filter) * N);
51 const void *const efault = tail_alloc(1);
52 struct sock_fprog *const prog = tail_alloc(sizeof(*prog));
53 long rc;
54
55 prog->filter = filter;
56 prog->len = N;
57 rc = syscall(__NR_seccomp, SECCOMP_SET_MODE_FILTER, -1, prog);
58 printf("seccomp(SECCOMP_SET_MODE_FILTER, %s, {len=%u, filter=%p})"
59 " = %ld %s (%m)\n", "SECCOMP_FILTER_FLAG_TSYNC|0xfffffffe",
60 prog->len, prog->filter, rc, errno2name());
61
62 rc = syscall(__NR_seccomp, SECCOMP_SET_MODE_FILTER, -2L, efault);
63 printf("seccomp(SECCOMP_SET_MODE_FILTER, %s, %p) = %ld %s (%m)\n",
64 "0xfffffffe /* SECCOMP_FILTER_FLAG_??? */",
65 efault, rc, errno2name());
66
67 puts("+++ exited with 0 +++");
68 return 0;
69 }
70
71 #else
72
73 SKIP_MAIN_UNDEFINED("__NR_seccomp && SECCOMP_SET_MODE_FILTER")
74
75 #endif
76