Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | #include <linux/netlink.h> |
| 15 | #include <linux/rtnetlink.h> |
| 16 | #include <linux/if.h> |
James Morris | 216efaa | 2005-08-15 20:34:48 -0700 | [diff] [blame] | 17 | #include <linux/inet_diag.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include <linux/xfrm.h> |
| 19 | #include <linux/audit.h> |
Paul Moore | 6a96e15 | 2014-01-28 14:45:41 -0500 | [diff] [blame] | 20 | #include <linux/sock_diag.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | |
| 22 | #include "flask.h" |
| 23 | #include "av_permissions.h" |
James Morris | 6a3fbe8 | 2011-08-30 12:09:15 +1000 | [diff] [blame] | 24 | #include "security.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | |
Eric Paris | bfff3aa | 2008-04-18 17:38:26 -0400 | [diff] [blame] | 26 | struct nlmsg_perm { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | u16 nlmsg_type; |
| 28 | u32 perm; |
| 29 | }; |
| 30 | |
| 31 | static struct nlmsg_perm nlmsg_route_perms[] = |
| 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 }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | { RTM_GETMULTICAST, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
| 63 | { RTM_GETANYCAST, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
Thomas Graf | c7fb64d | 2005-06-18 22:50:55 -0700 | [diff] [blame] | 64 | { RTM_GETNEIGHTBL, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
| 65 | { RTM_SETNEIGHTBL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
Michal Schmidt | 2f99db2 | 2008-11-05 13:35:06 +0100 | [diff] [blame] | 66 | { RTM_NEWADDRLABEL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
| 67 | { RTM_DELADDRLABEL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
| 68 | { RTM_GETADDRLABEL, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
Eric Paris | 350e4f3 | 2010-12-16 11:46:51 -0500 | [diff] [blame] | 69 | { RTM_GETDCB, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
| 70 | { RTM_SETDCB, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
Cong Wang | 6e73d71 | 2012-12-07 18:59:48 +0000 | [diff] [blame] | 71 | { RTM_NEWNETCONF, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
| 72 | { RTM_GETNETCONF, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
Amerigo Wang | 9dd9ff9 | 2012-12-14 22:09:50 +0000 | [diff] [blame] | 73 | { RTM_NEWMDB, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
| 74 | { RTM_DELMDB, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
Cong Wang | ee07c6e | 2012-12-07 00:04:48 +0000 | [diff] [blame] | 75 | { RTM_GETMDB, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
Nicolas Dichtel | 5bdfbc1 | 2015-04-08 18:36:38 +0200 | [diff] [blame] | 76 | { RTM_NEWNSID, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
Nicolas Dichtel | 387f989 | 2015-04-08 18:36:39 +0200 | [diff] [blame] | 77 | { RTM_DELNSID, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
Nicolas Dichtel | 5bdfbc1 | 2015-04-08 18:36:38 +0200 | [diff] [blame] | 78 | { RTM_GETNSID, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | }; |
| 80 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | static struct nlmsg_perm nlmsg_tcpdiag_perms[] = |
| 82 | { |
| 83 | { TCPDIAG_GETSOCK, NETLINK_TCPDIAG_SOCKET__NLMSG_READ }, |
James Morris | 216efaa | 2005-08-15 20:34:48 -0700 | [diff] [blame] | 84 | { DCCPDIAG_GETSOCK, NETLINK_TCPDIAG_SOCKET__NLMSG_READ }, |
Paul Moore | 6a96e15 | 2014-01-28 14:45:41 -0500 | [diff] [blame] | 85 | { SOCK_DIAG_BY_FAMILY, NETLINK_TCPDIAG_SOCKET__NLMSG_READ }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | }; |
| 87 | |
| 88 | static struct nlmsg_perm nlmsg_xfrm_perms[] = |
| 89 | { |
| 90 | { XFRM_MSG_NEWSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
| 91 | { XFRM_MSG_DELSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
| 92 | { XFRM_MSG_GETSA, NETLINK_XFRM_SOCKET__NLMSG_READ }, |
| 93 | { XFRM_MSG_NEWPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
| 94 | { XFRM_MSG_DELPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
| 95 | { XFRM_MSG_GETPOLICY, NETLINK_XFRM_SOCKET__NLMSG_READ }, |
| 96 | { XFRM_MSG_ALLOCSPI, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
Jamal Hadi Salim | 8c29bfe | 2006-03-20 19:17:39 -0800 | [diff] [blame] | 97 | { XFRM_MSG_ACQUIRE, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
| 98 | { XFRM_MSG_EXPIRE, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | { XFRM_MSG_UPDPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
| 100 | { XFRM_MSG_UPDSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
Jamal Hadi Salim | 8c29bfe | 2006-03-20 19:17:39 -0800 | [diff] [blame] | 101 | { XFRM_MSG_POLEXPIRE, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
| 102 | { XFRM_MSG_FLUSHSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
| 103 | { XFRM_MSG_FLUSHPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
| 104 | { XFRM_MSG_NEWAE, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
| 105 | { XFRM_MSG_GETAE, NETLINK_XFRM_SOCKET__NLMSG_READ }, |
Nicolas Dichtel | 2b7834d | 2015-04-08 18:36:40 +0200 | [diff] [blame] | 106 | { XFRM_MSG_NEWSPDINFO, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
Nicolas Dichtel | 5e6deeb | 2015-04-08 18:36:41 +0200 | [diff] [blame^] | 107 | { XFRM_MSG_GETSPDINFO, NETLINK_XFRM_SOCKET__NLMSG_READ }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | }; |
| 109 | |
| 110 | static struct nlmsg_perm nlmsg_audit_perms[] = |
| 111 | { |
James Morris | b207a29 | 2005-05-01 08:58:40 -0700 | [diff] [blame] | 112 | { AUDIT_GET, NETLINK_AUDIT_SOCKET__NLMSG_READ }, |
| 113 | { AUDIT_SET, NETLINK_AUDIT_SOCKET__NLMSG_WRITE }, |
| 114 | { AUDIT_LIST, NETLINK_AUDIT_SOCKET__NLMSG_READPRIV }, |
| 115 | { AUDIT_ADD, NETLINK_AUDIT_SOCKET__NLMSG_WRITE }, |
| 116 | { AUDIT_DEL, NETLINK_AUDIT_SOCKET__NLMSG_WRITE }, |
Amy Griffis | 93315ed | 2006-02-07 12:05:27 -0500 | [diff] [blame] | 117 | { AUDIT_LIST_RULES, NETLINK_AUDIT_SOCKET__NLMSG_READPRIV }, |
| 118 | { AUDIT_ADD_RULE, NETLINK_AUDIT_SOCKET__NLMSG_WRITE }, |
| 119 | { AUDIT_DEL_RULE, NETLINK_AUDIT_SOCKET__NLMSG_WRITE }, |
James Morris | b207a29 | 2005-05-01 08:58:40 -0700 | [diff] [blame] | 120 | { AUDIT_USER, NETLINK_AUDIT_SOCKET__NLMSG_RELAY }, |
Steve Grubb | c2f0c7c | 2005-05-06 12:38:39 +0100 | [diff] [blame] | 121 | { AUDIT_SIGNAL_INFO, NETLINK_AUDIT_SOCKET__NLMSG_READ }, |
Eric Paris | 850b0ce | 2009-06-02 17:01:16 -0400 | [diff] [blame] | 122 | { AUDIT_TRIM, NETLINK_AUDIT_SOCKET__NLMSG_WRITE }, |
| 123 | { AUDIT_MAKE_EQUIV, NETLINK_AUDIT_SOCKET__NLMSG_WRITE }, |
Miloslav Trmac | 522ed77 | 2007-07-15 23:40:56 -0700 | [diff] [blame] | 124 | { AUDIT_TTY_GET, NETLINK_AUDIT_SOCKET__NLMSG_READ }, |
Eric Paris | dd34b5d | 2009-03-05 13:43:35 -0500 | [diff] [blame] | 125 | { AUDIT_TTY_SET, NETLINK_AUDIT_SOCKET__NLMSG_TTY_AUDIT }, |
Eric Paris | b805b19 | 2013-05-24 12:09:50 -0400 | [diff] [blame] | 126 | { AUDIT_GET_FEATURE, NETLINK_AUDIT_SOCKET__NLMSG_READ }, |
| 127 | { AUDIT_SET_FEATURE, NETLINK_AUDIT_SOCKET__NLMSG_WRITE }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | }; |
| 129 | |
| 130 | |
| 131 | static int nlmsg_perm(u16 nlmsg_type, u32 *perm, struct nlmsg_perm *tab, size_t tabsize) |
| 132 | { |
| 133 | int i, err = -EINVAL; |
| 134 | |
| 135 | for (i = 0; i < tabsize/sizeof(struct nlmsg_perm); i++) |
| 136 | if (nlmsg_type == tab[i].nlmsg_type) { |
| 137 | *perm = tab[i].perm; |
| 138 | err = 0; |
| 139 | break; |
| 140 | } |
| 141 | |
| 142 | return err; |
| 143 | } |
| 144 | |
| 145 | int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm) |
| 146 | { |
| 147 | int err = 0; |
| 148 | |
| 149 | switch (sclass) { |
| 150 | case SECCLASS_NETLINK_ROUTE_SOCKET: |
| 151 | err = nlmsg_perm(nlmsg_type, perm, nlmsg_route_perms, |
| 152 | sizeof(nlmsg_route_perms)); |
| 153 | break; |
| 154 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | case SECCLASS_NETLINK_TCPDIAG_SOCKET: |
| 156 | err = nlmsg_perm(nlmsg_type, perm, nlmsg_tcpdiag_perms, |
| 157 | sizeof(nlmsg_tcpdiag_perms)); |
| 158 | break; |
| 159 | |
| 160 | case SECCLASS_NETLINK_XFRM_SOCKET: |
| 161 | err = nlmsg_perm(nlmsg_type, perm, nlmsg_xfrm_perms, |
| 162 | sizeof(nlmsg_xfrm_perms)); |
| 163 | break; |
| 164 | |
| 165 | case SECCLASS_NETLINK_AUDIT_SOCKET: |
Steve Grubb | 90d526c | 2005-11-03 15:48:08 +0000 | [diff] [blame] | 166 | if ((nlmsg_type >= AUDIT_FIRST_USER_MSG && |
| 167 | nlmsg_type <= AUDIT_LAST_USER_MSG) || |
| 168 | (nlmsg_type >= AUDIT_FIRST_USER_MSG2 && |
Eric Paris | bfff3aa | 2008-04-18 17:38:26 -0400 | [diff] [blame] | 169 | nlmsg_type <= AUDIT_LAST_USER_MSG2)) { |
David Woodhouse | 209aba0 | 2005-05-18 10:21:07 +0100 | [diff] [blame] | 170 | *perm = NETLINK_AUDIT_SOCKET__NLMSG_RELAY; |
| 171 | } else { |
| 172 | err = nlmsg_perm(nlmsg_type, perm, nlmsg_audit_perms, |
| 173 | sizeof(nlmsg_audit_perms)); |
| 174 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | break; |
| 176 | |
| 177 | /* No messaging from userspace, or class unknown/unhandled */ |
| 178 | default: |
| 179 | err = -ENOENT; |
| 180 | break; |
| 181 | } |
| 182 | |
| 183 | return err; |
| 184 | } |