1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
|
// SPDX-License-Identifier: GPL-2.0
#include <cap-ng.h>
#include <linux/capability.h>
#include <stdbool.h>
#include <string.h>
#include <stdio.h>
#include <sys/prctl.h>
#include <sys/auxv.h>
#include "../kselftest.h"
#ifndef PR_CAP_AMBIENT
#define PR_CAP_AMBIENT 47
# define PR_CAP_AMBIENT_IS_SET 1
# define PR_CAP_AMBIENT_RAISE 2
# define PR_CAP_AMBIENT_LOWER 3
# define PR_CAP_AMBIENT_CLEAR_ALL 4
#endif
#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 19)
# define HAVE_GETAUXVAL
#endif
static bool bool_arg(char **argv, int i)
{
if (!strcmp(argv[i], "0"))
return false;
else if (!strcmp(argv[i], "1"))
return true;
else {
ksft_exit_fail_msg("wrong argv[%d]\n", i);
return false;
}
}
int main(int argc, char **argv)
{
const char *atsec = "";
/*
* Be careful just in case a setgid or setcapped copy of this
* helper gets out.
*/
if (argc != 5)
ksft_exit_fail_msg("wrong argc\n");
#ifdef HAVE_GETAUXVAL
if (getauxval(AT_SECURE))
atsec = " (AT_SECURE is set)";
else
atsec = " (AT_SECURE is not set)";
#endif
capng_get_caps_process();
if (capng_have_capability(CAPNG_EFFECTIVE, CAP_NET_BIND_SERVICE) != bool_arg(argv, 1)) {
ksft_print_msg("Wrong effective state%s\n", atsec);
return 1;
}
if (capng_have_capability(CAPNG_PERMITTED, CAP_NET_BIND_SERVICE) != bool_arg(argv, 2)) {
ksft_print_msg("Wrong permitted state%s\n", atsec);
return 1;
}
if (capng_have_capability(CAPNG_INHERITABLE, CAP_NET_BIND_SERVICE) != bool_arg(argv, 3)) {
ksft_print_msg("Wrong inheritable state%s\n", atsec);
return 1;
}
if (prctl(PR_CAP_AMBIENT, PR_CAP_AMBIENT_IS_SET, CAP_NET_BIND_SERVICE, 0, 0, 0) != bool_arg(argv, 4)) {
ksft_print_msg("Wrong ambient state%s\n", atsec);
return 1;
}
ksft_print_msg("%s: Capabilities after execve were correct\n",
"validate_cap:");
return 0;
}
|
