1 /*
2 * Check decoding of setreuid/setregid/setreuid32/setregid32 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 <errno.h>
31 #include <stdio.h>
32 #include <unistd.h>
33
34 static int
ugid2int(const unsigned UGID_TYPE ugid)35 ugid2int(const unsigned UGID_TYPE ugid)
36 {
37 if ((unsigned UGID_TYPE) -1U == ugid)
38 return -1;
39 else
40 return ugid;
41 }
42
43 static void
print_int(const unsigned int num)44 print_int(const unsigned int num)
45 {
46 if (num == -1U)
47 printf("-1");
48 else
49 printf("%u", num);
50 }
51
52 static int
num_matches_id(const unsigned int num,const unsigned int ugid)53 num_matches_id(const unsigned int num, const unsigned int ugid)
54 {
55 return num == ugid || num == -1U;
56 }
57
58 #define PAIR(val) { val, ugid }, { ugid, val }
59
60 int
main(void)61 main(void)
62 {
63 unsigned int ugid = GETUGID;
64 CHECK_OVERFLOWUGID(ugid);
65
66 const struct {
67 const long r, e;
68 } tests[] = {
69 { ugid, ugid },
70 PAIR((unsigned long) 0xffffffff00000000ULL | ugid),
71 PAIR(-1U),
72 PAIR(-1L),
73 PAIR(0xffff0000U | ugid),
74 PAIR(0xffff),
75 PAIR(0xc0deffffU)
76 };
77
78 unsigned int i;
79
80 for (i = 0; i < ARRAY_SIZE(tests); ++i) {
81 const unsigned int rn = ugid2int(tests[i].r);
82 const unsigned int en = ugid2int(tests[i].e);
83
84 if (!num_matches_id(rn, ugid) || !num_matches_id(en, ugid))
85 continue;
86
87 if (syscall(SYSCALL_NR, tests[i].r, tests[i].e)) {
88 if (!i && ENOSYS == errno) {
89 printf("%s(%u, %u) = -1 ENOSYS (%m)\n",
90 SYSCALL_NAME, ugid, ugid);
91 break;
92 }
93 perror_msg_and_fail("%s(%#lx, %#lx)", SYSCALL_NAME,
94 tests[i].r, tests[i].e);
95 }
96
97 printf("%s(", SYSCALL_NAME);
98 print_int(rn);
99 printf(", ");
100 print_int(en);
101 printf(") = 0\n");
102 }
103
104 puts("+++ exited with 0 +++");
105 return 0;
106 }
107