1 /******************************************************************************/
2 /* */
3 /* Copyright (c) International Business Machines Corp., 2007, 2008 */
4 /* */
5 /* This program is free software; you can redistribute it and/or modify */
6 /* it under the terms of the GNU General Public License as published by */
7 /* the Free Software Foundation; either version 2 of the License, or */
8 /* (at your option) any later version. */
9 /* */
10 /* This program is distributed in the hope that it will be useful, */
11 /* but WITHOUT ANY WARRANTY; without even the implied warranty of */
12 /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See */
13 /* the GNU General Public License for more details. */
14 /* */
15 /* You should have received a copy of the GNU General Public License */
16 /* along with this program; if not, write to the Free Software */
17 /* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */
18 /* */
19 /******************************************************************************/
20 /*
21 * File: exec_without_inh.c
22 * Author: Serge Hallyn
23 * Make sure that CAP_SYS_ADMIN is not in pI
24 * drop CAP_SYS_ADMIN from bounding set
25 * Then exec "check_pe 0"
26 * check_pe will return PASS if it does not have CAP_SYS_ADMIN in pE.
27 */
28
29 #include <errno.h>
30 #include "config.h"
31 #if HAVE_SYS_CAPABILITY_H
32 #include <linux/types.h>
33 #include <sys/capability.h>
34 #endif
35 #include <sys/prctl.h>
36 #include "test.h"
37
38 char *TCID = "exec_without_inh";
39 int TST_TOTAL = 1;
40
main(void)41 int main(void)
42 {
43 #if HAVE_SYS_CAPABILITY_H
44 #if HAVE_DECL_PR_CAPBSET_DROP
45 #ifdef HAVE_LIBCAP
46 int ret = 1;
47 cap_flag_value_t f;
48 cap_value_t v[1];
49 cap_t cur;
50
51 /* Make sure CAP_SYS_ADMIN is not in pI */
52 cur = cap_get_proc();
53 ret = cap_get_flag(cur, CAP_SYS_ADMIN, CAP_INHERITABLE, &f);
54 if (f == CAP_SET) {
55 v[0] = CAP_SYS_ADMIN;
56 ret = cap_set_flag(cur, CAP_INHERITABLE, 1, v, CAP_CLEAR);
57 if (!ret)
58 ret = cap_set_proc(cur);
59 if (ret) {
60 tst_brkm(TBROK,
61 NULL,
62 "Failed to drop cap_sys_admin from pI");
63 }
64 } else if (ret) {
65 tst_brkm(TBROK | TERRNO, NULL, "Failed to add \
66 CAP_SYS_ADMIN to pI");
67 }
68 cap_free(cur);
69
70 /* drop the capability from bounding set */
71 ret = prctl(PR_CAPBSET_DROP, CAP_SYS_ADMIN);
72 if (ret) {
73 tst_resm(TFAIL,
74 "Failed to drop CAP_SYS_ADMIN from bounding set.");
75 tst_resm(TINFO, "(ret=%d, errno %d)", ret, errno);
76 tst_exit();
77 }
78
79 /* execute "check_pe 0" */
80 execl("check_pe", "check_pe", "0", NULL);
81 tst_resm(TBROK, "Failed to execute check_pe (errno %d)", errno);
82 #else /* libcap */
83 tst_resm(TCONF, "System doesn't have POSIX capabilities.");
84 #endif
85 #else /* HAVE_DECL_PR_CAPBSET_DROP */
86 tst_resm(TCONF, "System doesn't have CAPBSET prctls");
87 #endif
88 #else /* capability_h */
89 tst_resm(TCONF, "System doesn't have sys/capability.h.");
90 #endif
91 tst_exit();
92 }
93