1 /*
2 * Check decoding of setfsuid/setfsgid/setfsuid32/setfsgid32 syscalls.
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 <stdio.h>
31 #include <unistd.h>
32
33 void
printuid(unsigned UGID_TYPE id)34 printuid(unsigned UGID_TYPE id)
35 {
36 if (id == (unsigned UGID_TYPE) -1U)
37 printf("-1");
38 else
39 printf("%u", id);
40 }
41
42 int
main(void)43 main(void)
44 {
45 unsigned int ugid = GETUGID;
46
47 const kernel_ulong_t tests[] = {
48 ugid,
49 0xffff0000U | ugid,
50 (kernel_ulong_t) 0xffffffff00000000ULL | ugid,
51 0xffffU,
52 -1U,
53 -1L,
54 0xc0deffffU,
55 0xfacefeedU,
56 (long) 0xfacefeeddeadbeefULL
57 };
58
59 unsigned int i;
60
61 for (i = 0; i < ARRAY_SIZE(tests); ++i) {
62 const unsigned int num = (unsigned UGID_TYPE) tests[i];
63 unsigned int rc;
64
65 rc = syscall(SYSCALL_NR, tests[i]);
66 printf("%s(", SYSCALL_NAME);
67 printuid(num);
68 printf(") = %u\n", rc);
69
70 rc = syscall(SYSCALL_NR, ugid);
71 printf("%s(%u) = %u\n", SYSCALL_NAME, ugid, rc);
72 }
73
74 puts("+++ exited with 0 +++");
75 return 0;
76 }
77