1 /*
2 * Check decoding of setfsuid/setfsgid/setfsuid32/setfsgid32 syscalls.
3 *
4 * Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
5 * Copyright (c) 2016-2017 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 <stdio.h>
32 #include <unistd.h>
33
34 void
printuid(unsigned UGID_TYPE id)35 printuid(unsigned UGID_TYPE id)
36 {
37 if (id == (unsigned UGID_TYPE) -1U)
38 printf("-1");
39 else
40 printf("%u", id);
41 }
42
43 int
main(void)44 main(void)
45 {
46 unsigned int ugid = GETUGID;
47
48 const kernel_ulong_t tests[] = {
49 ugid,
50 0xffff0000U | ugid,
51 F8ILL_KULONG_MASK | ugid,
52 0xffffU,
53 -1U,
54 -1L,
55 0xc0deffffU,
56 0xfacefeedU,
57 (long) 0xfacefeeddeadbeefULL
58 };
59
60 unsigned int i;
61
62 for (i = 0; i < ARRAY_SIZE(tests); ++i) {
63 const unsigned int num = (unsigned UGID_TYPE) tests[i];
64 unsigned int rc;
65
66 rc = syscall(SYSCALL_NR, tests[i]);
67 printf("%s(", SYSCALL_NAME);
68 printuid(num);
69 printf(") = %u\n", rc);
70
71 rc = syscall(SYSCALL_NR, ugid);
72 printf("%s(%u) = %u\n", SYSCALL_NAME, ugid, rc);
73 }
74
75 puts("+++ exited with 0 +++");
76 return 0;
77 }
78