1 /*
2 * Check decoding of seccomp SECCOMP_GET_ACTION_AVAIL.
3 *
4 * Copyright (c) 2017 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 #include <asm/unistd.h>
32
33 #ifdef __NR_seccomp
34
35 # include <stdio.h>
36 # include <stdint.h>
37 # include <unistd.h>
38
39 # ifdef HAVE_LINUX_SECCOMP_H
40 # include <linux/seccomp.h>
41 # endif
42
43 # ifndef SECCOMP_GET_ACTION_AVAIL
44 # define SECCOMP_GET_ACTION_AVAIL 2
45 # endif
46
47 static const char *errstr;
48
49 static long
k_seccomp(const kernel_ulong_t op,const kernel_ulong_t flags,const kernel_ulong_t args)50 k_seccomp(const kernel_ulong_t op, const kernel_ulong_t flags,
51 const kernel_ulong_t args)
52 {
53 const long rc = syscall(__NR_seccomp, op, flags, args);
54 errstr = sprintrc(rc);
55 return rc;
56 }
57
58 int
main(void)59 main(void)
60 {
61 TAIL_ALLOC_OBJECT_CONST_PTR(uint32_t, act);
62 kernel_ulong_t op = (kernel_ulong_t) 0xfacefeed00000000ULL
63 | SECCOMP_GET_ACTION_AVAIL;
64 kernel_ulong_t flags = (kernel_ulong_t) 0xdeadbeef00000000ULL;
65 unsigned int i;
66
67 struct {
68 uint32_t val;
69 const char *str;
70 } actions [] = {
71 { 0, "SECCOMP_RET_KILL_THREAD" },
72 # ifdef SECCOMP_RET_KILL_PROCESS
73 { ARG_STR(SECCOMP_RET_KILL_PROCESS) },
74 # endif
75 # ifdef SECCOMP_RET_TRAP
76 { ARG_STR(SECCOMP_RET_TRAP) },
77 # endif
78 # ifdef SECCOMP_RET_ERRNO
79 { ARG_STR(SECCOMP_RET_ERRNO) },
80 # endif
81 # ifdef SECCOMP_RET_TRACE
82 { ARG_STR(SECCOMP_RET_TRACE) },
83 # endif
84 # ifdef SECCOMP_RET_LOG
85 { ARG_STR(SECCOMP_RET_LOG) },
86 # endif
87 # ifdef SECCOMP_RET_ALLOW
88 { ARG_STR(SECCOMP_RET_ALLOW) },
89 # endif
90 { 0xffffffff, "0xffffffff /* SECCOMP_RET_??? */" }
91 };
92
93 for (i = 0; i < ARRAY_SIZE(actions); ++i) {
94 *act = actions[i].val;
95 k_seccomp(op, flags, (uintptr_t) act);
96 printf("seccomp(SECCOMP_GET_ACTION_AVAIL, 0, [%s]) = %s\n",
97 actions[i].str, errstr);
98 }
99
100 *act = actions[0].val;
101
102 k_seccomp(op, flags, (uintptr_t) (act + 1));
103 printf("seccomp(SECCOMP_GET_ACTION_AVAIL, 0, %p) = %s\n",
104 act + 1, errstr);
105
106 if (F8ILL_KULONG_SUPPORTED) {
107 k_seccomp(op, flags, f8ill_ptr_to_kulong(act));
108 printf("seccomp(SECCOMP_GET_ACTION_AVAIL, 0, %#jx) = %s\n",
109 (uintmax_t) f8ill_ptr_to_kulong(act), errstr);
110 }
111
112 flags |= 0xcafef00d;
113 k_seccomp(op, flags, 0);
114 printf("seccomp(SECCOMP_GET_ACTION_AVAIL, %u, NULL) = %s\n",
115 (unsigned int) flags, errstr);
116
117 puts("+++ exited with 0 +++");
118 return 0;
119 }
120
121 #else
122
123 SKIP_MAIN_UNDEFINED("__NR_seccomp")
124
125 #endif
126