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
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
/*-
* Copyright (c) 2003-2005 SPARTA, Inc.
* All rights reserved.
*
* This software was developed for the FreeBSD Project in part by Network
* Associates Laboratories, the Security Research Division of Network
* Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"),
* as part of the DARPA CHATS research program.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_mac.h"
#include "opt_posix.h"
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/mac.h>
#include <sys/module.h>
#include <sys/systm.h>
#include <sys/sysctl.h>
#include <posix4/ksem.h>
#include <sys/mac_policy.h>
#include <security/mac/mac_internal.h>
static int mac_enforce_posix_sem = 1;
SYSCTL_INT(_security_mac, OID_AUTO, enforce_posix_sem, CTLFLAG_RW,
&mac_enforce_posix_sem, 0, "Enforce MAC policy on global POSIX semaphores");
TUNABLE_INT("security.mac.enforce_posix_sem", &mac_enforce_posix_sem);
static struct label *
mac_posix_sem_label_alloc(void)
{
struct label *label;
label = mac_labelzone_alloc(M_WAITOK);
MAC_PERFORM(init_posix_sem_label, label);
return (label);
}
void
mac_init_posix_sem(struct ksem *ksemptr)
{
ksemptr->ks_label = mac_posix_sem_label_alloc();
}
static void
mac_posix_sem_label_free(struct label *label)
{
MAC_PERFORM(destroy_posix_sem_label, label);
}
void
mac_destroy_posix_sem(struct ksem *ksemptr)
{
mac_posix_sem_label_free(ksemptr->ks_label);
ksemptr->ks_label = NULL;
}
void
mac_create_posix_sem(struct ucred *cred, struct ksem *ksemptr)
{
MAC_PERFORM(create_posix_sem, cred, ksemptr, ksemptr->ks_label);
}
int
mac_check_posix_sem_destroy(struct ucred *cred, struct ksem *ksemptr)
{
int error;
if (!mac_enforce_posix_sem)
return (0);
MAC_CHECK(check_posix_sem_destroy, cred, ksemptr, ksemptr->ks_label);
return(error);
}
int
mac_check_posix_sem_open(struct ucred *cred, struct ksem *ksemptr)
{
int error;
if (!mac_enforce_posix_sem)
return (0);
MAC_CHECK(check_posix_sem_open, cred, ksemptr, ksemptr->ks_label);
return(error);
}
int
mac_check_posix_sem_getvalue(struct ucred *cred, struct ksem *ksemptr)
{
int error;
if (!mac_enforce_posix_sem)
return (0);
MAC_CHECK(check_posix_sem_getvalue, cred, ksemptr,
ksemptr->ks_label);
return(error);
}
int
mac_check_posix_sem_post(struct ucred *cred, struct ksem *ksemptr)
{
int error;
if (!mac_enforce_posix_sem)
return (0);
MAC_CHECK(check_posix_sem_post, cred, ksemptr, ksemptr->ks_label);
return(error);
}
int
mac_check_posix_sem_unlink(struct ucred *cred, struct ksem *ksemptr)
{
int error;
if (!mac_enforce_posix_sem)
return (0);
MAC_CHECK(check_posix_sem_unlink, cred, ksemptr, ksemptr->ks_label);
return(error);
}
int
mac_check_posix_sem_wait(struct ucred *cred, struct ksem *ksemptr)
{
int error;
if (!mac_enforce_posix_sem)
return (0);
MAC_CHECK(check_posix_sem_wait, cred, ksemptr, ksemptr->ks_label);
return(error);
}
|
