1 /*
2 * Check decoding of setgroups/setgroups32 syscalls.
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 #ifdef __NR_setgroups32
32
33 # define SYSCALL_NR __NR_setgroups32
34 # define SYSCALL_NAME "setgroups32"
35 # define GID_TYPE unsigned int
36
37 #else
38
39 # include "tests.h"
40 # include <asm/unistd.h>
41
42 # ifdef __NR_setgroups
43
44 # define SYSCALL_NR __NR_setgroups
45 # define SYSCALL_NAME "setgroups"
46 # if defined __NR_setgroups32 && __NR_setgroups != __NR_setgroups32
47 # define GID_TYPE unsigned short
48 # else
49 # define GID_TYPE unsigned int
50 # endif
51
52 # endif
53
54 #endif
55
56 #ifdef GID_TYPE
57
58 # include <stdio.h>
59 # include <unistd.h>
60
61 void
printuid(GID_TYPE id)62 printuid(GID_TYPE id)
63 {
64 if (id == (GID_TYPE) -1U)
65 printf("-1");
66 else
67 printf("%u", id);
68 }
69
70 int
main(void)71 main(void)
72 {
73 const char *errstr;
74
75 /* check how the first argument is decoded */
76 long rc = syscall(SYSCALL_NR, 0, 0);
77 printf("%s(0, NULL) = %s\n", SYSCALL_NAME, sprintrc(rc));
78
79 rc = syscall(SYSCALL_NR, F8ILL_KULONG_MASK, 0);
80 printf("%s(0, NULL) = %s\n", SYSCALL_NAME, sprintrc(rc));
81
82 rc = syscall(SYSCALL_NR, 1, 0);
83 printf("%s(1, NULL) = %s\n", SYSCALL_NAME, sprintrc(rc));
84
85 rc = syscall(SYSCALL_NR, (long) 0xffffffff00000001ULL, 0);
86 printf("%s(1, NULL) = %s\n", SYSCALL_NAME, sprintrc(rc));
87
88 rc = syscall(SYSCALL_NR, -1U, 0);
89 printf("%s(%d, NULL) = %s\n", SYSCALL_NAME, -1, sprintrc(rc));
90
91 rc = syscall(SYSCALL_NR, -1L, 0);
92 printf("%s(%d, NULL) = %s\n", SYSCALL_NAME, -1, sprintrc(rc));
93
94 /* check how the second argument is decoded */
95 TAIL_ALLOC_OBJECT_CONST_PTR(const GID_TYPE, g1);
96 GID_TYPE *const g2 = tail_alloc(sizeof(*g2) * 2);
97 GID_TYPE *const g3 = tail_alloc(sizeof(*g3) * 3);
98
99 rc = syscall(SYSCALL_NR, 0, g1 + 1);
100 printf("%s(0, []) = %s\n", SYSCALL_NAME, sprintrc(rc));
101
102 rc = syscall(SYSCALL_NR, 1, g1);
103 errstr = sprintrc(rc);
104 printf("%s(1, [", SYSCALL_NAME);
105 printuid(*g1);
106 printf("]) = %s\n", errstr);
107
108 rc = syscall(SYSCALL_NR, 1, g1 + 1);
109 printf("%s(1, %p) = %s\n", SYSCALL_NAME, g1 + 1, sprintrc(rc));
110
111 rc = syscall(SYSCALL_NR, 1, -1L);
112 printf("%s(1, %#lx) = %s\n", SYSCALL_NAME, -1L, sprintrc(rc));
113
114 rc = syscall(SYSCALL_NR, 2, g1);
115 errstr = sprintrc(rc);
116 printf("%s(2, [", SYSCALL_NAME);
117 printuid(*g1);
118 printf(", ... /* %p */]) = %s\n", g1 + 1, errstr);
119
120 g2[0] = -2;
121 g2[1] = -3;
122 rc = syscall(SYSCALL_NR, 2, g2);
123 errstr = sprintrc(rc);
124 printf("%s(2, [", SYSCALL_NAME);
125 printuid(g2[0]);
126 printf(", ");
127 printuid(g2[1]);
128 printf("]) = %s\n", errstr);
129
130 rc = syscall(SYSCALL_NR, 3, g2);
131 errstr = sprintrc(rc);
132 printf("%s(3, [", SYSCALL_NAME);
133 printuid(g2[0]);
134 printf(", ");
135 printuid(g2[1]);
136 printf(", ... /* %p */]) = %s\n", g2 + 2, errstr);
137
138 g3[0] = 0;
139 g3[1] = 1;
140 rc = syscall(SYSCALL_NR, 3, g3);
141 errstr = sprintrc(rc);
142 printf("%s(3, [", SYSCALL_NAME);
143 printuid(g3[0]);
144 printf(", ");
145 printuid(g3[1]);
146 printf(", ...]) = %s\n", errstr);
147
148 rc = syscall(SYSCALL_NR, 4, g3);
149 errstr = sprintrc(rc);
150 printf("%s(4, [", SYSCALL_NAME);
151 printuid(g3[0]);
152 printf(", ");
153 printuid(g3[1]);
154 printf(", ...]) = %s\n", errstr);
155
156 rc = sysconf(_SC_NGROUPS_MAX);
157 const unsigned ngroups_max = rc;
158
159 if ((unsigned long) rc == ngroups_max && (int) ngroups_max > 0) {
160 rc = syscall(SYSCALL_NR, ngroups_max, g3);
161 errstr = sprintrc(rc);
162 printf("%s(%d, [", SYSCALL_NAME, ngroups_max);
163 printuid(g3[0]);
164 printf(", ");
165 printuid(g3[1]);
166 printf(", ...]) = %s\n", errstr);
167
168 rc = syscall(SYSCALL_NR, F8ILL_KULONG_MASK | ngroups_max, g3);
169 errstr = sprintrc(rc);
170 printf("%s(%d, [", SYSCALL_NAME, ngroups_max);
171 printuid(g3[0]);
172 printf(", ");
173 printuid(g3[1]);
174 printf(", ...]) = %s\n", errstr);
175
176 rc = syscall(SYSCALL_NR, ngroups_max + 1, g3);
177 printf("%s(%d, %p) = %s\n", SYSCALL_NAME,
178 ngroups_max + 1, g3, sprintrc(rc));
179 }
180
181 puts("+++ exited with 0 +++");
182 return 0;
183 }
184
185 #else
186
187 SKIP_MAIN_UNDEFINED("__NR_setgroups")
188
189 #endif
190