1 /*
2 * Check decoding of setgroups/setgroups32 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 #ifdef __NR_setgroups32
31
32 # define SYSCALL_NR __NR_setgroups32
33 # define SYSCALL_NAME "setgroups32"
34 # define GID_TYPE unsigned int
35
36 #else
37
38 # include "tests.h"
39 # include <asm/unistd.h>
40
41 # ifdef __NR_setgroups
42
43 # define SYSCALL_NR __NR_setgroups
44 # define SYSCALL_NAME "setgroups"
45 # if defined __NR_setgroups32 && __NR_setgroups != __NR_setgroups32
46 # define GID_TYPE unsigned short
47 # else
48 # define GID_TYPE unsigned int
49 # endif
50
51 # endif
52
53 #endif
54
55 #ifdef GID_TYPE
56
57 # include <stdio.h>
58 # include <unistd.h>
59
60 void
printuid(GID_TYPE id)61 printuid(GID_TYPE id)
62 {
63 if (id == (GID_TYPE) -1U)
64 printf("-1");
65 else
66 printf("%u", id);
67 }
68
69 int
main(void)70 main(void)
71 {
72 const char *errstr;
73
74 /* check how the first argument is decoded */
75 long rc = syscall(SYSCALL_NR, 0, 0);
76 printf("%s(0, NULL) = %s\n", SYSCALL_NAME, sprintrc(rc));
77
78 rc = syscall(SYSCALL_NR, (long) 0xffffffff00000000ULL, 0);
79 printf("%s(0, NULL) = %s\n", SYSCALL_NAME, sprintrc(rc));
80
81 rc = syscall(SYSCALL_NR, 1, 0);
82 printf("%s(1, NULL) = %s\n", SYSCALL_NAME, sprintrc(rc));
83
84 rc = syscall(SYSCALL_NR, (long) 0xffffffff00000001ULL, 0);
85 printf("%s(1, NULL) = %s\n", SYSCALL_NAME, sprintrc(rc));
86
87 rc = syscall(SYSCALL_NR, -1U, 0);
88 printf("%s(%d, NULL) = %s\n", SYSCALL_NAME, -1, sprintrc(rc));
89
90 rc = syscall(SYSCALL_NR, -1L, 0);
91 printf("%s(%d, NULL) = %s\n", SYSCALL_NAME, -1, sprintrc(rc));
92
93 /* check how the second argument is decoded */
94 const GID_TYPE *const g1 = tail_alloc(sizeof(*g1));
95 GID_TYPE *const g2 = tail_alloc(sizeof(*g2) * 2);
96 GID_TYPE *const g3 = tail_alloc(sizeof(*g3) * 3);
97
98 rc = syscall(SYSCALL_NR, 0, g1 + 1);
99 printf("%s(0, []) = %s\n", SYSCALL_NAME, sprintrc(rc));
100
101 rc = syscall(SYSCALL_NR, 1, g1);
102 errstr = sprintrc(rc);
103 printf("%s(1, [", SYSCALL_NAME);
104 printuid(*g1);
105 printf("]) = %s\n", errstr);
106
107 rc = syscall(SYSCALL_NR, 1, g1 + 1);
108 printf("%s(1, %p) = %s\n", SYSCALL_NAME, g1 + 1, sprintrc(rc));
109
110 rc = syscall(SYSCALL_NR, 1, -1L);
111 printf("%s(1, %#lx) = %s\n", SYSCALL_NAME, -1L, sprintrc(rc));
112
113 rc = syscall(SYSCALL_NR, 2, g1);
114 errstr = sprintrc(rc);
115 printf("%s(2, [", SYSCALL_NAME);
116 printuid(*g1);
117 printf(", %p]) = %s\n", g1 + 1, errstr);
118
119 g2[0] = -2;
120 g2[1] = -3;
121 rc = syscall(SYSCALL_NR, 2, g2);
122 errstr = sprintrc(rc);
123 printf("%s(2, [", SYSCALL_NAME);
124 printuid(g2[0]);
125 printf(", ");
126 printuid(g2[1]);
127 printf("]) = %s\n", errstr);
128
129 rc = syscall(SYSCALL_NR, 3, g2);
130 errstr = sprintrc(rc);
131 printf("%s(3, [", SYSCALL_NAME);
132 printuid(g2[0]);
133 printf(", ");
134 printuid(g2[1]);
135 printf(", %p]) = %s\n", g2 + 2, errstr);
136
137 g3[0] = 0;
138 g3[1] = 1;
139 rc = syscall(SYSCALL_NR, 3, g3);
140 errstr = sprintrc(rc);
141 printf("%s(3, [", SYSCALL_NAME);
142 printuid(g3[0]);
143 printf(", ");
144 printuid(g3[1]);
145 printf(", ...]) = %s\n", errstr);
146
147 rc = syscall(SYSCALL_NR, 4, g3);
148 errstr = sprintrc(rc);
149 printf("%s(4, [", SYSCALL_NAME);
150 printuid(g3[0]);
151 printf(", ");
152 printuid(g3[1]);
153 printf(", ...]) = %s\n", errstr);
154
155 rc = sysconf(_SC_NGROUPS_MAX);
156 const unsigned ngroups_max = rc;
157
158 if ((unsigned long) rc == ngroups_max && (int) ngroups_max > 0) {
159 rc = syscall(SYSCALL_NR, ngroups_max, g3);
160 errstr = sprintrc(rc);
161 printf("%s(%d, [", SYSCALL_NAME, ngroups_max);
162 printuid(g3[0]);
163 printf(", ");
164 printuid(g3[1]);
165 printf(", ...]) = %s\n", errstr);
166
167 const unsigned long size =
168 (unsigned long) 0xffffffff00000000ULL | ngroups_max;
169 rc = syscall(SYSCALL_NR, size, g3);
170 errstr = sprintrc(rc);
171 printf("%s(%d, [", SYSCALL_NAME, ngroups_max);
172 printuid(g3[0]);
173 printf(", ");
174 printuid(g3[1]);
175 printf(", ...]) = %s\n", errstr);
176
177 rc = syscall(SYSCALL_NR, ngroups_max + 1, g3);
178 printf("%s(%d, %p) = %s\n", SYSCALL_NAME,
179 ngroups_max + 1, g3, sprintrc(rc));
180 }
181
182 puts("+++ exited with 0 +++");
183 return 0;
184 }
185
186 #else
187
188 SKIP_MAIN_UNDEFINED("__NR_setgroups")
189
190 #endif
191