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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1da177e4 LT |
2 | /* |
3 | * Netlink message type permission tables, for user generated messages. | |
4 | * | |
5 | * Author: James Morris <jmorris@redhat.com> | |
6 | * | |
7 | * Copyright (C) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com> | |
1da177e4 LT |
8 | */ |
9 | #include <linux/types.h> | |
10 | #include <linux/kernel.h> | |
1da177e4 LT |
11 | #include <linux/netlink.h> |
12 | #include <linux/rtnetlink.h> | |
13 | #include <linux/if.h> | |
216efaaa | 14 | #include <linux/inet_diag.h> |
1da177e4 LT |
15 | #include <linux/xfrm.h> |
16 | #include <linux/audit.h> | |
6a96e150 | 17 | #include <linux/sock_diag.h> |
1da177e4 LT |
18 | |
19 | #include "flask.h" | |
20 | #include "av_permissions.h" | |
6a3fbe81 | 21 | #include "security.h" |
1da177e4 | 22 | |
bfff3aa4 | 23 | struct nlmsg_perm { |
1da177e4 LT |
24 | u16 nlmsg_type; |
25 | u32 perm; | |
26 | }; | |
27 | ||
579fc0dc | 28 | static const struct nlmsg_perm nlmsg_route_perms[] = |
1da177e4 LT |
29 | { |
30 | { RTM_NEWLINK, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, | |
31 | { RTM_DELLINK, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, | |
32 | { RTM_GETLINK, NETLINK_ROUTE_SOCKET__NLMSG_READ }, | |
33 | { RTM_SETLINK, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, | |
34 | { RTM_NEWADDR, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, | |
35 | { RTM_DELADDR, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, | |
36 | { RTM_GETADDR, NETLINK_ROUTE_SOCKET__NLMSG_READ }, | |
37 | { RTM_NEWROUTE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, | |
38 | { RTM_DELROUTE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, | |
39 | { RTM_GETROUTE, NETLINK_ROUTE_SOCKET__NLMSG_READ }, | |
40 | { RTM_NEWNEIGH, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, | |
41 | { RTM_DELNEIGH, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, | |
42 | { RTM_GETNEIGH, NETLINK_ROUTE_SOCKET__NLMSG_READ }, | |
43 | { RTM_NEWRULE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, | |
44 | { RTM_DELRULE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, | |
45 | { RTM_GETRULE, NETLINK_ROUTE_SOCKET__NLMSG_READ }, | |
46 | { RTM_NEWQDISC, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, | |
47 | { RTM_DELQDISC, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, | |
48 | { RTM_GETQDISC, NETLINK_ROUTE_SOCKET__NLMSG_READ }, | |
49 | { RTM_NEWTCLASS, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, | |
50 | { RTM_DELTCLASS, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, | |
51 | { RTM_GETTCLASS, NETLINK_ROUTE_SOCKET__NLMSG_READ }, | |
52 | { RTM_NEWTFILTER, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, | |
53 | { RTM_DELTFILTER, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, | |
54 | { RTM_GETTFILTER, NETLINK_ROUTE_SOCKET__NLMSG_READ }, | |
55 | { RTM_NEWACTION, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, | |
56 | { RTM_DELACTION, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, | |
57 | { RTM_GETACTION, NETLINK_ROUTE_SOCKET__NLMSG_READ }, | |
58 | { RTM_NEWPREFIX, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, | |
1da177e4 LT |
59 | { RTM_GETMULTICAST, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
60 | { RTM_GETANYCAST, NETLINK_ROUTE_SOCKET__NLMSG_READ }, | |
c7fb64db TG |
61 | { RTM_GETNEIGHTBL, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
62 | { RTM_SETNEIGHTBL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, | |
2f99db28 MS |
63 | { RTM_NEWADDRLABEL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
64 | { RTM_DELADDRLABEL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, | |
65 | { RTM_GETADDRLABEL, NETLINK_ROUTE_SOCKET__NLMSG_READ }, | |
350e4f31 EP |
66 | { RTM_GETDCB, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
67 | { RTM_SETDCB, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, | |
6e73d71d | 68 | { RTM_NEWNETCONF, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
983701eb | 69 | { RTM_DELNETCONF, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
6e73d71d | 70 | { RTM_GETNETCONF, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
9dd9ff99 AW |
71 | { RTM_NEWMDB, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
72 | { RTM_DELMDB, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, | |
ee07c6e7 | 73 | { RTM_GETMDB, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
5bdfbc1f | 74 | { RTM_NEWNSID, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
387f989a | 75 | { RTM_DELNSID, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
5bdfbc1f | 76 | { RTM_GETNSID, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
10c9ead9 RP |
77 | { RTM_NEWSTATS, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
78 | { RTM_GETSTATS, NETLINK_ROUTE_SOCKET__NLMSG_READ }, | |
94df30a6 | 79 | { RTM_NEWCACHEREPORT, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
598e1a42 PM |
80 | { RTM_NEWCHAIN, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
81 | { RTM_DELCHAIN, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, | |
82 | { RTM_GETCHAIN, NETLINK_ROUTE_SOCKET__NLMSG_READ }, | |
65ee00a9 DA |
83 | { RTM_NEWNEXTHOP, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
84 | { RTM_DELNEXTHOP, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, | |
85 | { RTM_GETNEXTHOP, NETLINK_ROUTE_SOCKET__NLMSG_READ }, | |
36fbf1e5 JP |
86 | { RTM_NEWLINKPROP, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
87 | { RTM_DELLINKPROP, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, | |
8dcea187 NA |
88 | { RTM_NEWVLAN, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
89 | { RTM_DELVLAN, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, | |
90 | { RTM_GETVLAN, NETLINK_ROUTE_SOCKET__NLMSG_READ }, | |
710ec562 IS |
91 | { RTM_NEWNEXTHOPBUCKET, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
92 | { RTM_DELNEXTHOPBUCKET, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, | |
93 | { RTM_GETNEXTHOPBUCKET, NETLINK_ROUTE_SOCKET__NLMSG_READ }, | |
1da177e4 LT |
94 | }; |
95 | ||
579fc0dc | 96 | static const struct nlmsg_perm nlmsg_tcpdiag_perms[] = |
1da177e4 LT |
97 | { |
98 | { TCPDIAG_GETSOCK, NETLINK_TCPDIAG_SOCKET__NLMSG_READ }, | |
216efaaa | 99 | { DCCPDIAG_GETSOCK, NETLINK_TCPDIAG_SOCKET__NLMSG_READ }, |
6a96e150 | 100 | { SOCK_DIAG_BY_FAMILY, NETLINK_TCPDIAG_SOCKET__NLMSG_READ }, |
08ff924e | 101 | { SOCK_DESTROY, NETLINK_TCPDIAG_SOCKET__NLMSG_WRITE }, |
1da177e4 LT |
102 | }; |
103 | ||
579fc0dc | 104 | static const struct nlmsg_perm nlmsg_xfrm_perms[] = |
1da177e4 LT |
105 | { |
106 | { XFRM_MSG_NEWSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, | |
107 | { XFRM_MSG_DELSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, | |
108 | { XFRM_MSG_GETSA, NETLINK_XFRM_SOCKET__NLMSG_READ }, | |
109 | { XFRM_MSG_NEWPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, | |
110 | { XFRM_MSG_DELPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, | |
111 | { XFRM_MSG_GETPOLICY, NETLINK_XFRM_SOCKET__NLMSG_READ }, | |
112 | { XFRM_MSG_ALLOCSPI, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, | |
8c29bfe1 JHS |
113 | { XFRM_MSG_ACQUIRE, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
114 | { XFRM_MSG_EXPIRE, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, | |
1da177e4 LT |
115 | { XFRM_MSG_UPDPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
116 | { XFRM_MSG_UPDSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, | |
8c29bfe1 JHS |
117 | { XFRM_MSG_POLEXPIRE, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
118 | { XFRM_MSG_FLUSHSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, | |
119 | { XFRM_MSG_FLUSHPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, | |
120 | { XFRM_MSG_NEWAE, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, | |
121 | { XFRM_MSG_GETAE, NETLINK_XFRM_SOCKET__NLMSG_READ }, | |
b0b59b00 | 122 | { XFRM_MSG_REPORT, NETLINK_XFRM_SOCKET__NLMSG_READ }, |
8d465bb7 | 123 | { XFRM_MSG_MIGRATE, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
5b5800fa ND |
124 | { XFRM_MSG_NEWSADINFO, NETLINK_XFRM_SOCKET__NLMSG_READ }, |
125 | { XFRM_MSG_GETSADINFO, NETLINK_XFRM_SOCKET__NLMSG_READ }, | |
2b7834d3 | 126 | { XFRM_MSG_NEWSPDINFO, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
5e6deeba | 127 | { XFRM_MSG_GETSPDINFO, NETLINK_XFRM_SOCKET__NLMSG_READ }, |
bd2cba07 | 128 | { XFRM_MSG_MAPPING, NETLINK_XFRM_SOCKET__NLMSG_READ }, |
844f7eaa ES |
129 | { XFRM_MSG_SETDEFAULT, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
130 | { XFRM_MSG_GETDEFAULT, NETLINK_XFRM_SOCKET__NLMSG_READ }, | |
1da177e4 LT |
131 | }; |
132 | ||
579fc0dc | 133 | static const struct nlmsg_perm nlmsg_audit_perms[] = |
1da177e4 | 134 | { |
b207a290 JM |
135 | { AUDIT_GET, NETLINK_AUDIT_SOCKET__NLMSG_READ }, |
136 | { AUDIT_SET, NETLINK_AUDIT_SOCKET__NLMSG_WRITE }, | |
137 | { AUDIT_LIST, NETLINK_AUDIT_SOCKET__NLMSG_READPRIV }, | |
138 | { AUDIT_ADD, NETLINK_AUDIT_SOCKET__NLMSG_WRITE }, | |
139 | { AUDIT_DEL, NETLINK_AUDIT_SOCKET__NLMSG_WRITE }, | |
93315ed6 AG |
140 | { AUDIT_LIST_RULES, NETLINK_AUDIT_SOCKET__NLMSG_READPRIV }, |
141 | { AUDIT_ADD_RULE, NETLINK_AUDIT_SOCKET__NLMSG_WRITE }, | |
142 | { AUDIT_DEL_RULE, NETLINK_AUDIT_SOCKET__NLMSG_WRITE }, | |
b207a290 | 143 | { AUDIT_USER, NETLINK_AUDIT_SOCKET__NLMSG_RELAY }, |
c2f0c7c3 | 144 | { AUDIT_SIGNAL_INFO, NETLINK_AUDIT_SOCKET__NLMSG_READ }, |
850b0cee EP |
145 | { AUDIT_TRIM, NETLINK_AUDIT_SOCKET__NLMSG_WRITE }, |
146 | { AUDIT_MAKE_EQUIV, NETLINK_AUDIT_SOCKET__NLMSG_WRITE }, | |
522ed776 | 147 | { AUDIT_TTY_GET, NETLINK_AUDIT_SOCKET__NLMSG_READ }, |
dd34b5d7 | 148 | { AUDIT_TTY_SET, NETLINK_AUDIT_SOCKET__NLMSG_TTY_AUDIT }, |
b805b198 EP |
149 | { AUDIT_GET_FEATURE, NETLINK_AUDIT_SOCKET__NLMSG_READ }, |
150 | { AUDIT_SET_FEATURE, NETLINK_AUDIT_SOCKET__NLMSG_WRITE }, | |
1da177e4 LT |
151 | }; |
152 | ||
153 | ||
579fc0dc | 154 | static int nlmsg_perm(u16 nlmsg_type, u32 *perm, const struct nlmsg_perm *tab, size_t tabsize) |
1da177e4 LT |
155 | { |
156 | int i, err = -EINVAL; | |
157 | ||
158 | for (i = 0; i < tabsize/sizeof(struct nlmsg_perm); i++) | |
159 | if (nlmsg_type == tab[i].nlmsg_type) { | |
160 | *perm = tab[i].perm; | |
161 | err = 0; | |
162 | break; | |
163 | } | |
164 | ||
165 | return err; | |
166 | } | |
167 | ||
168 | int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm) | |
169 | { | |
170 | int err = 0; | |
171 | ||
172 | switch (sclass) { | |
173 | case SECCLASS_NETLINK_ROUTE_SOCKET: | |
598e1a42 PM |
174 | /* RTM_MAX always points to RTM_SETxxxx, ie RTM_NEWxxx + 3. |
175 | * If the BUILD_BUG_ON() below fails you must update the | |
176 | * structures at the top of this file with the new mappings | |
177 | * before updating the BUILD_BUG_ON() macro! | |
178 | */ | |
710ec562 | 179 | BUILD_BUG_ON(RTM_MAX != (RTM_NEWNEXTHOPBUCKET + 3)); |
1da177e4 LT |
180 | err = nlmsg_perm(nlmsg_type, perm, nlmsg_route_perms, |
181 | sizeof(nlmsg_route_perms)); | |
182 | break; | |
183 | ||
1da177e4 LT |
184 | case SECCLASS_NETLINK_TCPDIAG_SOCKET: |
185 | err = nlmsg_perm(nlmsg_type, perm, nlmsg_tcpdiag_perms, | |
186 | sizeof(nlmsg_tcpdiag_perms)); | |
187 | break; | |
188 | ||
189 | case SECCLASS_NETLINK_XFRM_SOCKET: | |
598e1a42 PM |
190 | /* If the BUILD_BUG_ON() below fails you must update the |
191 | * structures at the top of this file with the new mappings | |
192 | * before updating the BUILD_BUG_ON() macro! | |
193 | */ | |
844f7eaa | 194 | BUILD_BUG_ON(XFRM_MSG_MAX != XFRM_MSG_GETDEFAULT); |
1da177e4 LT |
195 | err = nlmsg_perm(nlmsg_type, perm, nlmsg_xfrm_perms, |
196 | sizeof(nlmsg_xfrm_perms)); | |
197 | break; | |
198 | ||
199 | case SECCLASS_NETLINK_AUDIT_SOCKET: | |
90d526c0 SG |
200 | if ((nlmsg_type >= AUDIT_FIRST_USER_MSG && |
201 | nlmsg_type <= AUDIT_LAST_USER_MSG) || | |
202 | (nlmsg_type >= AUDIT_FIRST_USER_MSG2 && | |
bfff3aa4 | 203 | nlmsg_type <= AUDIT_LAST_USER_MSG2)) { |
209aba03 DW |
204 | *perm = NETLINK_AUDIT_SOCKET__NLMSG_RELAY; |
205 | } else { | |
206 | err = nlmsg_perm(nlmsg_type, perm, nlmsg_audit_perms, | |
207 | sizeof(nlmsg_audit_perms)); | |
208 | } | |
1da177e4 LT |
209 | break; |
210 | ||
211 | /* No messaging from userspace, or class unknown/unhandled */ | |
212 | default: | |
213 | err = -ENOENT; | |
214 | break; | |
215 | } | |
216 | ||
217 | return err; | |
218 | } |