| 1/*- 2 * Copyright (c) 1999, 2000, 2001, 2002 Robert N. M. Watson 3 * Copyright (c) 2001 Ilmar S. Habibulin 4 * Copyright (c) 2001, 2002 Networks Associates Technology, Inc. 5 * All rights reserved. 6 * 7 * This software was developed by Robert Watson and Ilmar Habibulin for the 8 * TrustedBSD Project. --- 22 unchanged lines hidden (view full) --- 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 * |
| 39 * $FreeBSD: head/sys/security/mac/mac_framework.c 101988 2002-08-16 14:21:38Z rwatson $ |
| 40 */ 41/* 42 * Developed by the TrustedBSD Project. 43 * 44 * Framework for extensible kernel access control. Kernel and userland 45 * interface to the framework, policy registration and composition. 46 */ 47 --- 114 unchanged lines hidden (view full) --- 162static int mac_vnode_label_cache_misses = 0; 163SYSCTL_INT(_security_mac, OID_AUTO, vnode_label_cache_misses, CTLFLAG_RD, 164 &mac_vnode_label_cache_misses, 0, "Cache misses on vnode labels"); 165static int mac_mmap_revocation_via_cow = 0; 166SYSCTL_INT(_security_mac, OID_AUTO, mmap_revocation_via_cow, CTLFLAG_RW, 167 &mac_mmap_revocation_via_cow, 0, "Revoke mmap access to files via " 168 "copy-on-write semantics, or by removing all write access"); 169 |
| 170#ifdef MAC_DEBUG |
| 171static unsigned int nmacmbufs, nmaccreds, nmacifnets, nmacbpfdescs, 172 nmacsockets, nmacmounts, nmactemp, nmacvnodes, nmacdevfsdirents, 173 nmacipqs, nmacpipes; 174SYSCTL_UINT(_security_mac_debug, OID_AUTO, mbufs, CTLFLAG_RD, 175 &nmacmbufs, 0, "number of mbufs in use"); 176SYSCTL_UINT(_security_mac_debug, OID_AUTO, creds, CTLFLAG_RD, 177 &nmaccreds, 0, "number of ucreds in use"); 178SYSCTL_UINT(_security_mac_debug, OID_AUTO, ifnets, CTLFLAG_RD, --- 9 unchanged lines hidden (view full) --- 188SYSCTL_UINT(_security_mac_debug, OID_AUTO, mounts, CTLFLAG_RD, 189 &nmacmounts, 0, "number of mounts in use"); 190SYSCTL_UINT(_security_mac_debug, OID_AUTO, temp, CTLFLAG_RD, 191 &nmactemp, 0, "number of temporary labels in use"); 192SYSCTL_UINT(_security_mac_debug, OID_AUTO, vnodes, CTLFLAG_RD, 193 &nmacvnodes, 0, "number of vnodes in use"); 194SYSCTL_UINT(_security_mac_debug, OID_AUTO, devfsdirents, CTLFLAG_RD, 195 &nmacdevfsdirents, 0, "number of devfs dirents inuse"); |
| 196#endif |
| 197 198static int error_select(int error1, int error2); 199static int mac_externalize(struct label *label, struct mac *mac); 200static int mac_policy_register(struct mac_policy_conf *mpc); 201static int mac_policy_unregister(struct mac_policy_conf *mpc); 202 203static int mac_stdcreatevnode_ea(struct vnode *vp); 204static void mac_cred_mmapped_drop_perms(struct thread *td, --- 1040 unchanged lines hidden (view full) --- 1245int 1246mac_init_mbuf(struct mbuf *m, int how) 1247{ 1248 KASSERT(m->m_flags & M_PKTHDR, ("mac_init_mbuf on non-header mbuf")); 1249 1250 /* "how" is one of M_(TRY|DONT)WAIT */ 1251 mac_init_label(&m->m_pkthdr.label); 1252 MAC_PERFORM(init_mbuf, m, how, &m->m_pkthdr.label); |
| 1253#ifdef MAC_DEBUG |
| 1254 atomic_add_int(&nmacmbufs, 1); |
| 1255#endif |
| 1256 return (0); 1257} 1258 1259void 1260mac_destroy_mbuf(struct mbuf *m) 1261{ 1262 1263 MAC_PERFORM(destroy_mbuf, m, &m->m_pkthdr.label); 1264 mac_destroy_label(&m->m_pkthdr.label); |
| 1265#ifdef MAC_DEBUG |
| 1266 atomic_subtract_int(&nmacmbufs, 1); |
| 1267#endif |
| 1268} 1269 1270void 1271mac_init_cred(struct ucred *cr) 1272{ 1273 1274 mac_init_label(&cr->cr_label); 1275 MAC_PERFORM(init_cred, cr, &cr->cr_label); |
| 1276#ifdef MAC_DEBUG |
| 1277 atomic_add_int(&nmaccreds, 1); |
| 1278#endif |
| 1279} 1280 1281void 1282mac_destroy_cred(struct ucred *cr) 1283{ 1284 1285 MAC_PERFORM(destroy_cred, cr, &cr->cr_label); 1286 mac_destroy_label(&cr->cr_label); |
| 1287#ifdef MAC_DEBUG |
| 1288 atomic_subtract_int(&nmaccreds, 1); |
| 1289#endif |
| 1290} 1291 1292void 1293mac_init_ifnet(struct ifnet *ifp) 1294{ 1295 1296 mac_init_label(&ifp->if_label); 1297 MAC_PERFORM(init_ifnet, ifp, &ifp->if_label); |
| 1298#ifdef MAC_DEBUG |
| 1299 atomic_add_int(&nmacifnets, 1); |
| 1300#endif |
| 1301} 1302 1303void 1304mac_destroy_ifnet(struct ifnet *ifp) 1305{ 1306 1307 MAC_PERFORM(destroy_ifnet, ifp, &ifp->if_label); 1308 mac_destroy_label(&ifp->if_label); |
| 1309#ifdef MAC_DEBUG |
| 1310 atomic_subtract_int(&nmacifnets, 1); |
| 1311#endif |
| 1312} 1313 1314void 1315mac_init_ipq(struct ipq *ipq) 1316{ 1317 1318 mac_init_label(&ipq->ipq_label); 1319 MAC_PERFORM(init_ipq, ipq, &ipq->ipq_label); |
| 1320#ifdef MAC_DEBUG |
| 1321 atomic_add_int(&nmacipqs, 1); |
| 1322#endif |
| 1323} 1324 1325void 1326mac_destroy_ipq(struct ipq *ipq) 1327{ 1328 1329 MAC_PERFORM(destroy_ipq, ipq, &ipq->ipq_label); 1330 mac_destroy_label(&ipq->ipq_label); |
| 1331#ifdef MAC_DEBUG |
| 1332 atomic_subtract_int(&nmacipqs, 1); |
| 1333#endif |
| 1334} 1335 1336void 1337mac_init_socket(struct socket *socket) 1338{ 1339 1340 mac_init_label(&socket->so_label); 1341 mac_init_label(&socket->so_peerlabel); 1342 MAC_PERFORM(init_socket, socket, &socket->so_label, 1343 &socket->so_peerlabel); |
| 1344#ifdef MAC_DEBUG |
| 1345 atomic_add_int(&nmacsockets, 1); |
| 1346#endif |
| 1347} 1348 1349void 1350mac_destroy_socket(struct socket *socket) 1351{ 1352 1353 MAC_PERFORM(destroy_socket, socket, &socket->so_label, 1354 &socket->so_peerlabel); 1355 mac_destroy_label(&socket->so_label); 1356 mac_destroy_label(&socket->so_peerlabel); |
| 1357#ifdef MAC_DEBUG |
| 1358 atomic_subtract_int(&nmacsockets, 1); |
| 1359#endif |
| 1360} 1361 1362void 1363mac_init_pipe(struct pipe *pipe) 1364{ 1365 struct label *label; 1366 1367 label = malloc(sizeof(struct label), M_MACPIPELABEL, M_ZERO|M_WAITOK); 1368 mac_init_label(label); 1369 pipe->pipe_label = label; 1370 pipe->pipe_peer->pipe_label = label; 1371 MAC_PERFORM(init_pipe, pipe, pipe->pipe_label); |
| 1372#ifdef MAC_DEBUG |
| 1373 atomic_add_int(&nmacpipes, 1); |
| 1374#endif |
| 1375} 1376 1377void 1378mac_destroy_pipe(struct pipe *pipe) 1379{ 1380 1381 MAC_PERFORM(destroy_pipe, pipe, pipe->pipe_label); 1382 mac_destroy_label(pipe->pipe_label); 1383 free(pipe->pipe_label, M_MACPIPELABEL); |
| 1384#ifdef MAC_DEBUG |
| 1385 atomic_subtract_int(&nmacpipes, 1); |
| 1386#endif |
| 1387} 1388 1389void 1390mac_init_bpfdesc(struct bpf_d *bpf_d) 1391{ 1392 1393 mac_init_label(&bpf_d->bd_label); 1394 MAC_PERFORM(init_bpfdesc, bpf_d, &bpf_d->bd_label); |
| 1395#ifdef MAC_DEBUG |
| 1396 atomic_add_int(&nmacbpfdescs, 1); |
| 1397#endif |
| 1398} 1399 1400void 1401mac_destroy_bpfdesc(struct bpf_d *bpf_d) 1402{ 1403 1404 MAC_PERFORM(destroy_bpfdesc, bpf_d, &bpf_d->bd_label); 1405 mac_destroy_label(&bpf_d->bd_label); |
| 1406#ifdef MAC_DEBUG |
| 1407 atomic_subtract_int(&nmacbpfdescs, 1); |
| 1408#endif |
| 1409} 1410 1411void 1412mac_init_mount(struct mount *mp) 1413{ 1414 1415 mac_init_label(&mp->mnt_mntlabel); 1416 mac_init_label(&mp->mnt_fslabel); 1417 MAC_PERFORM(init_mount, mp, &mp->mnt_mntlabel, &mp->mnt_fslabel); |
| 1418#ifdef MAC_DEBUG |
| 1419 atomic_add_int(&nmacmounts, 1); |
| 1420#endif |
| 1421} 1422 1423void 1424mac_destroy_mount(struct mount *mp) 1425{ 1426 1427 MAC_PERFORM(destroy_mount, mp, &mp->mnt_mntlabel, &mp->mnt_fslabel); 1428 mac_destroy_label(&mp->mnt_fslabel); 1429 mac_destroy_label(&mp->mnt_mntlabel); |
| 1430#ifdef MAC_DEBUG |
| 1431 atomic_subtract_int(&nmacmounts, 1); |
| 1432#endif |
| 1433} 1434 1435static void 1436mac_init_temp(struct label *label) 1437{ 1438 1439 mac_init_label(label); 1440 MAC_PERFORM(init_temp, label); |
| 1441#ifdef MAC_DEBUG |
| 1442 atomic_add_int(&nmactemp, 1); |
| 1443#endif |
| 1444} 1445 1446static void 1447mac_destroy_temp(struct label *label) 1448{ 1449 1450 MAC_PERFORM(destroy_temp, label); 1451 mac_destroy_label(label); |
| 1452#ifdef MAC_DEBUG |
| 1453 atomic_subtract_int(&nmactemp, 1); |
| 1454#endif |
| 1455} 1456 1457void 1458mac_init_vnode(struct vnode *vp) 1459{ 1460 1461 mac_init_label(&vp->v_label); 1462 MAC_PERFORM(init_vnode, vp, &vp->v_label); |
| 1463#ifdef MAC_DEBUG |
| 1464 atomic_add_int(&nmacvnodes, 1); |
| 1465#endif |
| 1466} 1467 1468void 1469mac_destroy_vnode(struct vnode *vp) 1470{ 1471 1472 MAC_PERFORM(destroy_vnode, vp, &vp->v_label); 1473 mac_destroy_label(&vp->v_label); |
| 1474#ifdef MAC_DEBUG |
| 1475 atomic_subtract_int(&nmacvnodes, 1); |
| 1476#endif |
| 1477} 1478 1479void 1480mac_init_devfsdirent(struct devfs_dirent *de) 1481{ 1482 1483 mac_init_label(&de->de_label); 1484 MAC_PERFORM(init_devfsdirent, de, &de->de_label); |
| 1485#ifdef MAC_DEBUG |
| 1486 atomic_add_int(&nmacdevfsdirents, 1); |
| 1487#endif |
| 1488} 1489 1490void 1491mac_destroy_devfsdirent(struct devfs_dirent *de) 1492{ 1493 1494 MAC_PERFORM(destroy_devfsdirent, de, &de->de_label); 1495 mac_destroy_label(&de->de_label); |
| 1496#ifdef MAC_DEBUG |
| 1497 atomic_subtract_int(&nmacdevfsdirents, 1); |
| 1498#endif |
| 1499} 1500 1501static int 1502mac_externalize(struct label *label, struct mac *mac) 1503{ 1504 int error; 1505 1506 mac_init_structmac(mac); --- 1660 unchanged lines hidden --- |