1 /*
2 * Check decoding of seccomp SECCOMP_SET_MODE_FILTER.
3 *
4 * Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
5 * Copyright (c) 2016-2018 The strace developers.
6 * All rights reserved.
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 * 3. The name of the author may not be used to endorse or promote products
17 * derived from this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include "tests.h"
32
33 #include <stdio.h>
34 #include <asm/unistd.h>
35 #include <unistd.h>
36
37 #ifdef HAVE_LINUX_SECCOMP_H
38 # include <linux/seccomp.h>
39 #endif
40 #include <linux/filter.h>
41
42 #if defined __NR_seccomp && defined SECCOMP_SET_MODE_FILTER
43
44 # define N 7
45
46 int
main(void)47 main(void)
48 {
49 struct sock_filter *const filter = tail_alloc(sizeof(*filter) * N);
50 const void *const efault = tail_alloc(1);
51 TAIL_ALLOC_OBJECT_CONST_PTR(struct sock_fprog, prog);
52 long rc;
53
54 prog->filter = filter;
55 prog->len = N;
56 rc = syscall(__NR_seccomp, SECCOMP_SET_MODE_FILTER, -1, prog);
57 printf("seccomp(SECCOMP_SET_MODE_FILTER, %s, {len=%u, filter=%p})"
58 " = %ld %s (%m)\n",
59 "SECCOMP_FILTER_FLAG_TSYNC|SECCOMP_FILTER_FLAG_LOG|"
60 "SECCOMP_FILTER_FLAG_SPEC_ALLOW|0xfffffff8",
61 prog->len, prog->filter, rc, errno2name());
62
63 rc = syscall(__NR_seccomp, SECCOMP_SET_MODE_FILTER, -8L, efault);
64 printf("seccomp(SECCOMP_SET_MODE_FILTER, %s, %p) = %ld %s (%m)\n",
65 "0xfffffff8 /* SECCOMP_FILTER_FLAG_??? */",
66 efault, rc, errno2name());
67
68 puts("+++ exited with 0 +++");
69 return 0;
70 }
71
72 #else
73
74 SKIP_MAIN_UNDEFINED("__NR_seccomp && SECCOMP_SET_MODE_FILTER")
75
76 #endif
77