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treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 499
[mirror_ubuntu-hirsute-kernel.git] / security / selinux / nlmsgtab.c
CommitLineData
1da177e4
LT		 1/*
2 * Netlink message type permission tables, for user generated messages.
3 *
4 * Author: James Morris <jmorris@redhat.com>
5 *
6 * Copyright (C) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2,
10 * as published by the Free Software Foundation.
11 */
12#include <linux/types.h>
13#include <linux/kernel.h>
1da177e4
LT		 14#include <linux/netlink.h>
15#include <linux/rtnetlink.h>
16#include <linux/if.h>
216efaaa 17#include <linux/inet_diag.h>
1da177e4
LT		 18#include <linux/xfrm.h>
19#include <linux/audit.h>
6a96e150 20#include <linux/sock_diag.h>
1da177e4
LT		 21
22#include "flask.h"
23#include "av_permissions.h"
6a3fbe81 24#include "security.h"
1da177e4 25
bfff3aa4 26struct nlmsg_perm {
1da177e4
LT		 27 u16 nlmsg_type;
28 u32 perm;
29};
30
579fc0dc 31static const struct nlmsg_perm nlmsg_route_perms[] =
1da177e4
LT		 32{
33 { RTM_NEWLINK, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
34 { RTM_DELLINK, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
35 { RTM_GETLINK, NETLINK_ROUTE_SOCKET__NLMSG_READ },
36 { RTM_SETLINK, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
37 { RTM_NEWADDR, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
38 { RTM_DELADDR, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
39 { RTM_GETADDR, NETLINK_ROUTE_SOCKET__NLMSG_READ },
40 { RTM_NEWROUTE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
41 { RTM_DELROUTE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
42 { RTM_GETROUTE, NETLINK_ROUTE_SOCKET__NLMSG_READ },
43 { RTM_NEWNEIGH, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
44 { RTM_DELNEIGH, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
45 { RTM_GETNEIGH, NETLINK_ROUTE_SOCKET__NLMSG_READ },
46 { RTM_NEWRULE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
47 { RTM_DELRULE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
48 { RTM_GETRULE, NETLINK_ROUTE_SOCKET__NLMSG_READ },
49 { RTM_NEWQDISC, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
50 { RTM_DELQDISC, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
51 { RTM_GETQDISC, NETLINK_ROUTE_SOCKET__NLMSG_READ },
52 { RTM_NEWTCLASS, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
53 { RTM_DELTCLASS, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
54 { RTM_GETTCLASS, NETLINK_ROUTE_SOCKET__NLMSG_READ },
55 { RTM_NEWTFILTER, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
56 { RTM_DELTFILTER, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
57 { RTM_GETTFILTER, NETLINK_ROUTE_SOCKET__NLMSG_READ },
58 { RTM_NEWACTION, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
59 { RTM_DELACTION, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
60 { RTM_GETACTION, NETLINK_ROUTE_SOCKET__NLMSG_READ },
61 { RTM_NEWPREFIX, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
1da177e4
LT		 62 { RTM_GETMULTICAST, NETLINK_ROUTE_SOCKET__NLMSG_READ },
63 { RTM_GETANYCAST, NETLINK_ROUTE_SOCKET__NLMSG_READ },
c7fb64db
TG		 64 { RTM_GETNEIGHTBL, NETLINK_ROUTE_SOCKET__NLMSG_READ },
65 { RTM_SETNEIGHTBL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
2f99db28
MS		 66 { RTM_NEWADDRLABEL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
67 { RTM_DELADDRLABEL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
68 { RTM_GETADDRLABEL, NETLINK_ROUTE_SOCKET__NLMSG_READ },
350e4f31
EP		 69 { RTM_GETDCB, NETLINK_ROUTE_SOCKET__NLMSG_READ },
70 { RTM_SETDCB, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
6e73d71d 71 { RTM_NEWNETCONF, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
983701eb 72 { RTM_DELNETCONF, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
6e73d71d 73 { RTM_GETNETCONF, NETLINK_ROUTE_SOCKET__NLMSG_READ },
9dd9ff99
AW		 74 { RTM_NEWMDB, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
75 { RTM_DELMDB, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
ee07c6e7 76 { RTM_GETMDB, NETLINK_ROUTE_SOCKET__NLMSG_READ },
5bdfbc1f 77 { RTM_NEWNSID, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
387f989a 78 { RTM_DELNSID, NETLINK_ROUTE_SOCKET__NLMSG_READ },
5bdfbc1f 79 { RTM_GETNSID, NETLINK_ROUTE_SOCKET__NLMSG_READ },
10c9ead9
RP		 80 { RTM_NEWSTATS, NETLINK_ROUTE_SOCKET__NLMSG_READ },
81 { RTM_GETSTATS, NETLINK_ROUTE_SOCKET__NLMSG_READ },
94df30a6 82 { RTM_NEWCACHEREPORT, NETLINK_ROUTE_SOCKET__NLMSG_READ },
598e1a42
PM		 83 { RTM_NEWCHAIN, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
84 { RTM_DELCHAIN, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
85 { RTM_GETCHAIN, NETLINK_ROUTE_SOCKET__NLMSG_READ },
1da177e4
LT		 86};
87
579fc0dc 88static const struct nlmsg_perm nlmsg_tcpdiag_perms[] =
1da177e4
LT		 89{
90 { TCPDIAG_GETSOCK, NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
216efaaa 91 { DCCPDIAG_GETSOCK, NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
6a96e150 92 { SOCK_DIAG_BY_FAMILY, NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
08ff924e 93 { SOCK_DESTROY, NETLINK_TCPDIAG_SOCKET__NLMSG_WRITE },
1da177e4
LT		 94};
95
579fc0dc 96static const struct nlmsg_perm nlmsg_xfrm_perms[] =
1da177e4
LT		 97{
98 { XFRM_MSG_NEWSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
99 { XFRM_MSG_DELSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
100 { XFRM_MSG_GETSA, NETLINK_XFRM_SOCKET__NLMSG_READ },
101 { XFRM_MSG_NEWPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
102 { XFRM_MSG_DELPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
103 { XFRM_MSG_GETPOLICY, NETLINK_XFRM_SOCKET__NLMSG_READ },
104 { XFRM_MSG_ALLOCSPI, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
8c29bfe1
JHS		 105 { XFRM_MSG_ACQUIRE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
106 { XFRM_MSG_EXPIRE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
1da177e4
LT		 107 { XFRM_MSG_UPDPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
108 { XFRM_MSG_UPDSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
8c29bfe1
JHS		 109 { XFRM_MSG_POLEXPIRE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
110 { XFRM_MSG_FLUSHSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
111 { XFRM_MSG_FLUSHPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
112 { XFRM_MSG_NEWAE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
113 { XFRM_MSG_GETAE, NETLINK_XFRM_SOCKET__NLMSG_READ },
b0b59b00 114 { XFRM_MSG_REPORT, NETLINK_XFRM_SOCKET__NLMSG_READ },
8d465bb7 115 { XFRM_MSG_MIGRATE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
5b5800fa
ND		 116 { XFRM_MSG_NEWSADINFO, NETLINK_XFRM_SOCKET__NLMSG_READ },
117 { XFRM_MSG_GETSADINFO, NETLINK_XFRM_SOCKET__NLMSG_READ },
2b7834d3 118 { XFRM_MSG_NEWSPDINFO, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
5e6deeba 119 { XFRM_MSG_GETSPDINFO, NETLINK_XFRM_SOCKET__NLMSG_READ },
bd2cba07 120 { XFRM_MSG_MAPPING, NETLINK_XFRM_SOCKET__NLMSG_READ },
1da177e4
LT		 121};
122
579fc0dc 123static const struct nlmsg_perm nlmsg_audit_perms[] =
1da177e4 124{
b207a290
JM		 125 { AUDIT_GET, NETLINK_AUDIT_SOCKET__NLMSG_READ },
126 { AUDIT_SET, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
127 { AUDIT_LIST, NETLINK_AUDIT_SOCKET__NLMSG_READPRIV },
128 { AUDIT_ADD, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
129 { AUDIT_DEL, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
93315ed6
AG		 130 { AUDIT_LIST_RULES, NETLINK_AUDIT_SOCKET__NLMSG_READPRIV },
131 { AUDIT_ADD_RULE, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
132 { AUDIT_DEL_RULE, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
b207a290 133 { AUDIT_USER, NETLINK_AUDIT_SOCKET__NLMSG_RELAY },
c2f0c7c3 134 { AUDIT_SIGNAL_INFO, NETLINK_AUDIT_SOCKET__NLMSG_READ },
850b0cee
EP		 135 { AUDIT_TRIM, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
136 { AUDIT_MAKE_EQUIV, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
522ed776 137 { AUDIT_TTY_GET, NETLINK_AUDIT_SOCKET__NLMSG_READ },
dd34b5d7 138 { AUDIT_TTY_SET, NETLINK_AUDIT_SOCKET__NLMSG_TTY_AUDIT },
b805b198
EP		 139 { AUDIT_GET_FEATURE, NETLINK_AUDIT_SOCKET__NLMSG_READ },
140 { AUDIT_SET_FEATURE, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
1da177e4
LT		 141};
142
143
579fc0dc 144static int nlmsg_perm(u16 nlmsg_type, u32 *perm, const struct nlmsg_perm *tab, size_t tabsize)
1da177e4
LT		 145{
146 int i, err = -EINVAL;
147
148 for (i = 0; i < tabsize/sizeof(struct nlmsg_perm); i++)
149 if (nlmsg_type == tab[i].nlmsg_type) {
150 *perm = tab[i].perm;
151 err = 0;
152 break;
153 }
154
155 return err;
156}
157
158int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm)
159{
160 int err = 0;
161
162 switch (sclass) {
163 case SECCLASS_NETLINK_ROUTE_SOCKET:
598e1a42
PM		 164 /* RTM_MAX always points to RTM_SETxxxx, ie RTM_NEWxxx + 3.
165 * If the BUILD_BUG_ON() below fails you must update the
166 * structures at the top of this file with the new mappings
167 * before updating the BUILD_BUG_ON() macro!
168 */
32a4f5ec 169 BUILD_BUG_ON(RTM_MAX != (RTM_NEWCHAIN + 3));
1da177e4
LT		 170 err = nlmsg_perm(nlmsg_type, perm, nlmsg_route_perms,
171 sizeof(nlmsg_route_perms));
172 break;
173
1da177e4
LT		 174 case SECCLASS_NETLINK_TCPDIAG_SOCKET:
175 err = nlmsg_perm(nlmsg_type, perm, nlmsg_tcpdiag_perms,
176 sizeof(nlmsg_tcpdiag_perms));
177 break;
178
179 case SECCLASS_NETLINK_XFRM_SOCKET:
598e1a42
PM		 180 /* If the BUILD_BUG_ON() below fails you must update the
181 * structures at the top of this file with the new mappings
182 * before updating the BUILD_BUG_ON() macro!
183 */
cf890138 184 BUILD_BUG_ON(XFRM_MSG_MAX != XFRM_MSG_MAPPING);
1da177e4
LT		 185 err = nlmsg_perm(nlmsg_type, perm, nlmsg_xfrm_perms,
186 sizeof(nlmsg_xfrm_perms));
187 break;
188
189 case SECCLASS_NETLINK_AUDIT_SOCKET:
90d526c0
SG		 190 if ((nlmsg_type >= AUDIT_FIRST_USER_MSG &&
191 nlmsg_type <= AUDIT_LAST_USER_MSG) ||
192 (nlmsg_type >= AUDIT_FIRST_USER_MSG2 &&
bfff3aa4 193 nlmsg_type <= AUDIT_LAST_USER_MSG2)) {
209aba03
DW		 194 *perm = NETLINK_AUDIT_SOCKET__NLMSG_RELAY;
195 } else {
196 err = nlmsg_perm(nlmsg_type, perm, nlmsg_audit_perms,
197 sizeof(nlmsg_audit_perms));
198 }
1da177e4
LT		 199 break;
200
201 /* No messaging from userspace, or class unknown/unhandled */
202 default:
203 err = -ENOENT;
204 break;
205 }
206
207 return err;
208}
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