mac_lomac.c revision 172955
1/*- 2 * Copyright (c) 1999-2002, 2007 Robert N. M. Watson 3 * Copyright (c) 2001-2005 Networks Associates Technology, Inc. 4 * Copyright (c) 2006 SPARTA, Inc. 5 * All rights reserved. 6 * 7 * This software was developed by Robert Watson for the TrustedBSD Project. 8 * 9 * This software was developed for the FreeBSD Project in part by NAI Labs, 10 * the Security Research Division of Network Associates, Inc. under 11 * DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA 12 * CHATS research program. 13 * 14 * This software was enhanced by SPARTA ISSO under SPAWAR contract 15 * N66001-04-C-6019 ("SEFOS"). 16 * 17 * Redistribution and use in source and binary forms, with or without 18 * modification, are permitted provided that the following conditions 19 * are met: 20 * 1. Redistributions of source code must retain the above copyright 21 * notice, this list of conditions and the following disclaimer. 22 * 2. Redistributions in binary form must reproduce the above copyright 23 * notice, this list of conditions and the following disclaimer in the 24 * documentation and/or other materials provided with the distribution. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * $FreeBSD: head/sys/security/mac_lomac/mac_lomac.c 172955 2007-10-25 11:31:11Z rwatson $ 39 */ 40 41/* 42 * Developed by the TrustedBSD Project. 43 * 44 * Low-watermark floating label mandatory integrity policy. 45 */ 46 47#include <sys/types.h> 48#include <sys/param.h> 49#include <sys/acl.h> 50#include <sys/conf.h> 51#include <sys/extattr.h> 52#include <sys/kernel.h> 53#include <sys/malloc.h> 54#include <sys/mman.h> 55#include <sys/mount.h> 56#include <sys/priv.h> 57#include <sys/proc.h> 58#include <sys/sbuf.h> 59#include <sys/systm.h> 60#include <sys/sysproto.h> 61#include <sys/sysent.h> 62#include <sys/systm.h> 63#include <sys/vnode.h> 64#include <sys/file.h> 65#include <sys/socket.h> 66#include <sys/socketvar.h> 67#include <sys/sx.h> 68#include <sys/pipe.h> 69#include <sys/sysctl.h> 70#include <sys/syslog.h> 71 72#include <fs/devfs/devfs.h> 73 74#include <net/bpfdesc.h> 75#include <net/if.h> 76#include <net/if_types.h> 77#include <net/if_var.h> 78 79#include <netinet/in.h> 80#include <netinet/in_pcb.h> 81#include <netinet/ip_var.h> 82 83#include <vm/vm.h> 84 85#include <security/mac/mac_policy.h> 86#include <security/mac/mac_framework.h> 87#include <security/mac_lomac/mac_lomac.h> 88 89struct mac_lomac_proc { 90 struct mac_lomac mac_lomac; 91 struct mtx mtx; 92}; 93 94SYSCTL_DECL(_security_mac); 95 96SYSCTL_NODE(_security_mac, OID_AUTO, lomac, CTLFLAG_RW, 0, 97 "TrustedBSD mac_lomac policy controls"); 98 99static int lomac_label_size = sizeof(struct mac_lomac); 100SYSCTL_INT(_security_mac_lomac, OID_AUTO, label_size, CTLFLAG_RD, 101 &lomac_label_size, 0, "Size of struct mac_lomac"); 102 103static int lomac_enabled = 1; 104SYSCTL_INT(_security_mac_lomac, OID_AUTO, enabled, CTLFLAG_RW, 105 &lomac_enabled, 0, "Enforce MAC/LOMAC policy"); 106TUNABLE_INT("security.mac.lomac.enabled", &lomac_enabled); 107 108static int destroyed_not_inited; 109SYSCTL_INT(_security_mac_lomac, OID_AUTO, destroyed_not_inited, CTLFLAG_RD, 110 &destroyed_not_inited, 0, "Count of labels destroyed but not inited"); 111 112static int trust_all_interfaces = 0; 113SYSCTL_INT(_security_mac_lomac, OID_AUTO, trust_all_interfaces, CTLFLAG_RD, 114 &trust_all_interfaces, 0, "Consider all interfaces 'trusted' by MAC/LOMAC"); 115TUNABLE_INT("security.mac.lomac.trust_all_interfaces", &trust_all_interfaces); 116 117static char trusted_interfaces[128]; 118SYSCTL_STRING(_security_mac_lomac, OID_AUTO, trusted_interfaces, CTLFLAG_RD, 119 trusted_interfaces, 0, "Interfaces considered 'trusted' by MAC/LOMAC"); 120TUNABLE_STR("security.mac.lomac.trusted_interfaces", trusted_interfaces, 121 sizeof(trusted_interfaces)); 122 123static int ptys_equal = 0; 124SYSCTL_INT(_security_mac_lomac, OID_AUTO, ptys_equal, CTLFLAG_RW, 125 &ptys_equal, 0, "Label pty devices as lomac/equal on create"); 126TUNABLE_INT("security.mac.lomac.ptys_equal", &ptys_equal); 127 128static int revocation_enabled = 1; 129SYSCTL_INT(_security_mac_lomac, OID_AUTO, revocation_enabled, CTLFLAG_RW, 130 &revocation_enabled, 0, "Revoke access to objects on relabel"); 131TUNABLE_INT("security.mac.lomac.revocation_enabled", &revocation_enabled); 132 133static int lomac_slot; 134#define SLOT(l) ((struct mac_lomac *)mac_label_get((l), lomac_slot)) 135#define SLOT_SET(l, val) mac_label_set((l), lomac_slot, (uintptr_t)(val)) 136#define PSLOT(l) ((struct mac_lomac_proc *) \ 137 mac_label_get((l), lomac_slot)) 138#define PSLOT_SET(l, val) mac_label_set((l), lomac_slot, (uintptr_t)(val)) 139 140MALLOC_DEFINE(M_LOMAC, "mac_lomac_label", "MAC/LOMAC labels"); 141 142static struct mac_lomac * 143lomac_alloc(int flag) 144{ 145 struct mac_lomac *ml; 146 147 ml = malloc(sizeof(*ml), M_LOMAC, M_ZERO | flag); 148 149 return (ml); 150} 151 152static void 153lomac_free(struct mac_lomac *ml) 154{ 155 156 if (ml != NULL) 157 free(ml, M_LOMAC); 158 else 159 atomic_add_int(&destroyed_not_inited, 1); 160} 161 162static int 163lomac_atmostflags(struct mac_lomac *ml, int flags) 164{ 165 166 if ((ml->ml_flags & flags) != ml->ml_flags) 167 return (EINVAL); 168 return (0); 169} 170 171static int 172lomac_dominate_element(struct mac_lomac_element *a, 173 struct mac_lomac_element *b) 174{ 175 176 switch (a->mle_type) { 177 case MAC_LOMAC_TYPE_EQUAL: 178 case MAC_LOMAC_TYPE_HIGH: 179 return (1); 180 181 case MAC_LOMAC_TYPE_LOW: 182 switch (b->mle_type) { 183 case MAC_LOMAC_TYPE_GRADE: 184 case MAC_LOMAC_TYPE_HIGH: 185 return (0); 186 187 case MAC_LOMAC_TYPE_EQUAL: 188 case MAC_LOMAC_TYPE_LOW: 189 return (1); 190 191 default: 192 panic("lomac_dominate_element: b->mle_type invalid"); 193 } 194 195 case MAC_LOMAC_TYPE_GRADE: 196 switch (b->mle_type) { 197 case MAC_LOMAC_TYPE_EQUAL: 198 case MAC_LOMAC_TYPE_LOW: 199 return (1); 200 201 case MAC_LOMAC_TYPE_HIGH: 202 return (0); 203 204 case MAC_LOMAC_TYPE_GRADE: 205 return (a->mle_grade >= b->mle_grade); 206 207 default: 208 panic("lomac_dominate_element: b->mle_type invalid"); 209 } 210 211 default: 212 panic("lomac_dominate_element: a->mle_type invalid"); 213 } 214} 215 216static int 217lomac_range_in_range(struct mac_lomac *rangea, struct mac_lomac *rangeb) 218{ 219 220 return (lomac_dominate_element(&rangeb->ml_rangehigh, 221 &rangea->ml_rangehigh) && 222 lomac_dominate_element(&rangea->ml_rangelow, 223 &rangeb->ml_rangelow)); 224} 225 226static int 227lomac_single_in_range(struct mac_lomac *single, struct mac_lomac *range) 228{ 229 230 KASSERT((single->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0, 231 ("lomac_single_in_range: a not single")); 232 KASSERT((range->ml_flags & MAC_LOMAC_FLAG_RANGE) != 0, 233 ("lomac_single_in_range: b not range")); 234 235 return (lomac_dominate_element(&range->ml_rangehigh, 236 &single->ml_single) && lomac_dominate_element(&single->ml_single, 237 &range->ml_rangelow)); 238} 239 240static int 241lomac_auxsingle_in_range(struct mac_lomac *single, struct mac_lomac *range) 242{ 243 244 KASSERT((single->ml_flags & MAC_LOMAC_FLAG_AUX) != 0, 245 ("lomac_single_in_range: a not auxsingle")); 246 KASSERT((range->ml_flags & MAC_LOMAC_FLAG_RANGE) != 0, 247 ("lomac_single_in_range: b not range")); 248 249 return (lomac_dominate_element(&range->ml_rangehigh, 250 &single->ml_auxsingle) && 251 lomac_dominate_element(&single->ml_auxsingle, 252 &range->ml_rangelow)); 253} 254 255static int 256lomac_dominate_single(struct mac_lomac *a, struct mac_lomac *b) 257{ 258 KASSERT((a->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0, 259 ("lomac_dominate_single: a not single")); 260 KASSERT((b->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0, 261 ("lomac_dominate_single: b not single")); 262 263 return (lomac_dominate_element(&a->ml_single, &b->ml_single)); 264} 265 266static int 267lomac_subject_dominate(struct mac_lomac *a, struct mac_lomac *b) 268{ 269 KASSERT((~a->ml_flags & 270 (MAC_LOMAC_FLAG_SINGLE | MAC_LOMAC_FLAG_RANGE)) == 0, 271 ("lomac_dominate_single: a not subject")); 272 KASSERT((b->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0, 273 ("lomac_dominate_single: b not single")); 274 275 return (lomac_dominate_element(&a->ml_rangehigh, &b->ml_single)); 276} 277 278static int 279lomac_equal_element(struct mac_lomac_element *a, struct mac_lomac_element *b) 280{ 281 282 if (a->mle_type == MAC_LOMAC_TYPE_EQUAL || 283 b->mle_type == MAC_LOMAC_TYPE_EQUAL) 284 return (1); 285 286 return (a->mle_type == b->mle_type && a->mle_grade == b->mle_grade); 287} 288 289static int 290lomac_equal_single(struct mac_lomac *a, struct mac_lomac *b) 291{ 292 293 KASSERT((a->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0, 294 ("lomac_equal_single: a not single")); 295 KASSERT((b->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0, 296 ("lomac_equal_single: b not single")); 297 298 return (lomac_equal_element(&a->ml_single, &b->ml_single)); 299} 300 301static int 302lomac_contains_equal(struct mac_lomac *ml) 303{ 304 305 if (ml->ml_flags & MAC_LOMAC_FLAG_SINGLE) 306 if (ml->ml_single.mle_type == MAC_LOMAC_TYPE_EQUAL) 307 return (1); 308 if (ml->ml_flags & MAC_LOMAC_FLAG_AUX) 309 if (ml->ml_auxsingle.mle_type == MAC_LOMAC_TYPE_EQUAL) 310 return (1); 311 312 if (ml->ml_flags & MAC_LOMAC_FLAG_RANGE) { 313 if (ml->ml_rangelow.mle_type == MAC_LOMAC_TYPE_EQUAL) 314 return (1); 315 if (ml->ml_rangehigh.mle_type == MAC_LOMAC_TYPE_EQUAL) 316 return (1); 317 } 318 319 return (0); 320} 321 322static int 323lomac_subject_privileged(struct mac_lomac *ml) 324{ 325 326 KASSERT((ml->ml_flags & MAC_LOMAC_FLAGS_BOTH) == 327 MAC_LOMAC_FLAGS_BOTH, 328 ("lomac_subject_privileged: subject doesn't have both labels")); 329 330 /* If the single is EQUAL, it's ok. */ 331 if (ml->ml_single.mle_type == MAC_LOMAC_TYPE_EQUAL) 332 return (0); 333 334 /* If either range endpoint is EQUAL, it's ok. */ 335 if (ml->ml_rangelow.mle_type == MAC_LOMAC_TYPE_EQUAL || 336 ml->ml_rangehigh.mle_type == MAC_LOMAC_TYPE_EQUAL) 337 return (0); 338 339 /* If the range is low-high, it's ok. */ 340 if (ml->ml_rangelow.mle_type == MAC_LOMAC_TYPE_LOW && 341 ml->ml_rangehigh.mle_type == MAC_LOMAC_TYPE_HIGH) 342 return (0); 343 344 /* It's not ok. */ 345 return (EPERM); 346} 347 348static int 349lomac_high_single(struct mac_lomac *ml) 350{ 351 352 KASSERT((ml->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0, 353 ("lomac_high_single: mac_lomac not single")); 354 355 return (ml->ml_single.mle_type == MAC_LOMAC_TYPE_HIGH); 356} 357 358static int 359lomac_valid(struct mac_lomac *ml) 360{ 361 362 if (ml->ml_flags & MAC_LOMAC_FLAG_SINGLE) { 363 switch (ml->ml_single.mle_type) { 364 case MAC_LOMAC_TYPE_GRADE: 365 case MAC_LOMAC_TYPE_EQUAL: 366 case MAC_LOMAC_TYPE_HIGH: 367 case MAC_LOMAC_TYPE_LOW: 368 break; 369 370 default: 371 return (EINVAL); 372 } 373 } else { 374 if (ml->ml_single.mle_type != MAC_LOMAC_TYPE_UNDEF) 375 return (EINVAL); 376 } 377 378 if (ml->ml_flags & MAC_LOMAC_FLAG_AUX) { 379 switch (ml->ml_auxsingle.mle_type) { 380 case MAC_LOMAC_TYPE_GRADE: 381 case MAC_LOMAC_TYPE_EQUAL: 382 case MAC_LOMAC_TYPE_HIGH: 383 case MAC_LOMAC_TYPE_LOW: 384 break; 385 386 default: 387 return (EINVAL); 388 } 389 } else { 390 if (ml->ml_auxsingle.mle_type != MAC_LOMAC_TYPE_UNDEF) 391 return (EINVAL); 392 } 393 394 if (ml->ml_flags & MAC_LOMAC_FLAG_RANGE) { 395 switch (ml->ml_rangelow.mle_type) { 396 case MAC_LOMAC_TYPE_GRADE: 397 case MAC_LOMAC_TYPE_EQUAL: 398 case MAC_LOMAC_TYPE_HIGH: 399 case MAC_LOMAC_TYPE_LOW: 400 break; 401 402 default: 403 return (EINVAL); 404 } 405 406 switch (ml->ml_rangehigh.mle_type) { 407 case MAC_LOMAC_TYPE_GRADE: 408 case MAC_LOMAC_TYPE_EQUAL: 409 case MAC_LOMAC_TYPE_HIGH: 410 case MAC_LOMAC_TYPE_LOW: 411 break; 412 413 default: 414 return (EINVAL); 415 } 416 if (!lomac_dominate_element(&ml->ml_rangehigh, 417 &ml->ml_rangelow)) 418 return (EINVAL); 419 } else { 420 if (ml->ml_rangelow.mle_type != MAC_LOMAC_TYPE_UNDEF || 421 ml->ml_rangehigh.mle_type != MAC_LOMAC_TYPE_UNDEF) 422 return (EINVAL); 423 } 424 425 return (0); 426} 427 428static void 429lomac_set_range(struct mac_lomac *ml, u_short typelow, u_short gradelow, 430 u_short typehigh, u_short gradehigh) 431{ 432 433 ml->ml_rangelow.mle_type = typelow; 434 ml->ml_rangelow.mle_grade = gradelow; 435 ml->ml_rangehigh.mle_type = typehigh; 436 ml->ml_rangehigh.mle_grade = gradehigh; 437 ml->ml_flags |= MAC_LOMAC_FLAG_RANGE; 438} 439 440static void 441lomac_set_single(struct mac_lomac *ml, u_short type, u_short grade) 442{ 443 444 ml->ml_single.mle_type = type; 445 ml->ml_single.mle_grade = grade; 446 ml->ml_flags |= MAC_LOMAC_FLAG_SINGLE; 447} 448 449static void 450lomac_copy_range(struct mac_lomac *labelfrom, struct mac_lomac *labelto) 451{ 452 453 KASSERT((labelfrom->ml_flags & MAC_LOMAC_FLAG_RANGE) != 0, 454 ("lomac_copy_range: labelfrom not range")); 455 456 labelto->ml_rangelow = labelfrom->ml_rangelow; 457 labelto->ml_rangehigh = labelfrom->ml_rangehigh; 458 labelto->ml_flags |= MAC_LOMAC_FLAG_RANGE; 459} 460 461static void 462lomac_copy_single(struct mac_lomac *labelfrom, struct mac_lomac *labelto) 463{ 464 465 KASSERT((labelfrom->ml_flags & MAC_LOMAC_FLAG_SINGLE) != 0, 466 ("lomac_copy_single: labelfrom not single")); 467 468 labelto->ml_single = labelfrom->ml_single; 469 labelto->ml_flags |= MAC_LOMAC_FLAG_SINGLE; 470} 471 472static void 473lomac_copy_auxsingle(struct mac_lomac *labelfrom, struct mac_lomac *labelto) 474{ 475 476 KASSERT((labelfrom->ml_flags & MAC_LOMAC_FLAG_AUX) != 0, 477 ("lomac_copy_auxsingle: labelfrom not auxsingle")); 478 479 labelto->ml_auxsingle = labelfrom->ml_auxsingle; 480 labelto->ml_flags |= MAC_LOMAC_FLAG_AUX; 481} 482 483static void 484lomac_copy(struct mac_lomac *source, struct mac_lomac *dest) 485{ 486 487 if (source->ml_flags & MAC_LOMAC_FLAG_SINGLE) 488 lomac_copy_single(source, dest); 489 if (source->ml_flags & MAC_LOMAC_FLAG_AUX) 490 lomac_copy_auxsingle(source, dest); 491 if (source->ml_flags & MAC_LOMAC_FLAG_RANGE) 492 lomac_copy_range(source, dest); 493} 494 495static int lomac_to_string(struct sbuf *sb, struct mac_lomac *ml); 496 497static int 498maybe_demote(struct mac_lomac *subjlabel, struct mac_lomac *objlabel, 499 const char *actionname, const char *objname, struct vnode *vp) 500{ 501 struct sbuf subjlabel_sb, subjtext_sb, objlabel_sb; 502 char *subjlabeltext, *objlabeltext, *subjtext; 503 struct mac_lomac cached_subjlabel; 504 struct mac_lomac_proc *subj; 505 struct vattr va; 506 struct proc *p; 507 pid_t pgid; 508 509 subj = PSLOT(curthread->td_proc->p_label); 510 511 p = curthread->td_proc; 512 mtx_lock(&subj->mtx); 513 if (subj->mac_lomac.ml_flags & MAC_LOMAC_FLAG_UPDATE) { 514 /* 515 * Check to see if the pending demotion would be more or less 516 * severe than this one, and keep the more severe. This can 517 * only happen for a multi-threaded application. 518 */ 519 if (lomac_dominate_single(objlabel, &subj->mac_lomac)) { 520 mtx_unlock(&subj->mtx); 521 return (0); 522 } 523 } 524 bzero(&subj->mac_lomac, sizeof(subj->mac_lomac)); 525 /* 526 * Always demote the single label. 527 */ 528 lomac_copy_single(objlabel, &subj->mac_lomac); 529 /* 530 * Start with the original range, then minimize each side of the 531 * range to the point of not dominating the object. The high side 532 * will always be demoted, of course. 533 */ 534 lomac_copy_range(subjlabel, &subj->mac_lomac); 535 if (!lomac_dominate_element(&objlabel->ml_single, 536 &subj->mac_lomac.ml_rangelow)) 537 subj->mac_lomac.ml_rangelow = objlabel->ml_single; 538 subj->mac_lomac.ml_rangehigh = objlabel->ml_single; 539 subj->mac_lomac.ml_flags |= MAC_LOMAC_FLAG_UPDATE; 540 thread_lock(curthread); 541 curthread->td_flags |= TDF_ASTPENDING | TDF_MACPEND; 542 thread_unlock(curthread); 543 544 /* 545 * Avoid memory allocation while holding a mutex; cache the label. 546 */ 547 lomac_copy_single(&subj->mac_lomac, &cached_subjlabel); 548 mtx_unlock(&subj->mtx); 549 550 sbuf_new(&subjlabel_sb, NULL, 0, SBUF_AUTOEXTEND); 551 lomac_to_string(&subjlabel_sb, subjlabel); 552 sbuf_finish(&subjlabel_sb); 553 subjlabeltext = sbuf_data(&subjlabel_sb); 554 555 sbuf_new(&subjtext_sb, NULL, 0, SBUF_AUTOEXTEND); 556 lomac_to_string(&subjtext_sb, &subj->mac_lomac); 557 sbuf_finish(&subjtext_sb); 558 subjtext = sbuf_data(&subjtext_sb); 559 560 sbuf_new(&objlabel_sb, NULL, 0, SBUF_AUTOEXTEND); 561 lomac_to_string(&objlabel_sb, objlabel); 562 sbuf_finish(&objlabel_sb); 563 objlabeltext = sbuf_data(&objlabel_sb); 564 565 pgid = p->p_pgrp->pg_id; /* XXX could be stale? */ 566 if (vp != NULL && VOP_GETATTR(vp, &va, curthread->td_ucred, 567 curthread) == 0) { 568 log(LOG_INFO, "LOMAC: level-%s subject p%dg%du%d:%s demoted to" 569 " level %s after %s a level-%s %s (inode=%ld, " 570 "mountpount=%s)\n", 571 subjlabeltext, p->p_pid, pgid, curthread->td_ucred->cr_uid, 572 p->p_comm, subjtext, actionname, objlabeltext, objname, 573 va.va_fileid, vp->v_mount->mnt_stat.f_mntonname); 574 } else { 575 log(LOG_INFO, "LOMAC: level-%s subject p%dg%du%d:%s demoted to" 576 " level %s after %s a level-%s %s\n", 577 subjlabeltext, p->p_pid, pgid, curthread->td_ucred->cr_uid, 578 p->p_comm, subjtext, actionname, objlabeltext, objname); 579 } 580 581 sbuf_delete(&subjlabel_sb); 582 sbuf_delete(&subjtext_sb); 583 sbuf_delete(&objlabel_sb); 584 585 return (0); 586} 587 588/* 589 * Relabel "to" to "from" only if "from" is a valid label (contains at least 590 * a single), as for a relabel operation which may or may not involve a 591 * relevant label. 592 */ 593static void 594try_relabel(struct mac_lomac *from, struct mac_lomac *to) 595{ 596 597 if (from->ml_flags & MAC_LOMAC_FLAG_SINGLE) { 598 bzero(to, sizeof(*to)); 599 lomac_copy(from, to); 600 } 601} 602 603/* 604 * Policy module operations. 605 */ 606static void 607lomac_init(struct mac_policy_conf *conf) 608{ 609 610} 611 612/* 613 * Label operations. 614 */ 615static void 616lomac_init_label(struct label *label) 617{ 618 619 SLOT_SET(label, lomac_alloc(M_WAITOK)); 620} 621 622static int 623lomac_init_label_waitcheck(struct label *label, int flag) 624{ 625 626 SLOT_SET(label, lomac_alloc(flag)); 627 if (SLOT(label) == NULL) 628 return (ENOMEM); 629 630 return (0); 631} 632 633static void 634lomac_proc_init_label(struct label *label) 635{ 636 637 PSLOT_SET(label, malloc(sizeof(struct mac_lomac_proc), M_LOMAC, 638 M_ZERO | M_WAITOK)); 639 mtx_init(&PSLOT(label)->mtx, "MAC/Lomac proc lock", NULL, MTX_DEF); 640} 641 642static void 643lomac_destroy_label(struct label *label) 644{ 645 646 lomac_free(SLOT(label)); 647 SLOT_SET(label, NULL); 648} 649 650static void 651lomac_proc_destroy_label(struct label *label) 652{ 653 654 mtx_destroy(&PSLOT(label)->mtx); 655 FREE(PSLOT(label), M_LOMAC); 656 PSLOT_SET(label, NULL); 657} 658 659static int 660lomac_element_to_string(struct sbuf *sb, struct mac_lomac_element *element) 661{ 662 663 switch (element->mle_type) { 664 case MAC_LOMAC_TYPE_HIGH: 665 return (sbuf_printf(sb, "high")); 666 667 case MAC_LOMAC_TYPE_LOW: 668 return (sbuf_printf(sb, "low")); 669 670 case MAC_LOMAC_TYPE_EQUAL: 671 return (sbuf_printf(sb, "equal")); 672 673 case MAC_LOMAC_TYPE_GRADE: 674 return (sbuf_printf(sb, "%d", element->mle_grade)); 675 676 default: 677 panic("lomac_element_to_string: invalid type (%d)", 678 element->mle_type); 679 } 680} 681 682static int 683lomac_to_string(struct sbuf *sb, struct mac_lomac *ml) 684{ 685 686 if (ml->ml_flags & MAC_LOMAC_FLAG_SINGLE) { 687 if (lomac_element_to_string(sb, &ml->ml_single) == -1) 688 return (EINVAL); 689 } 690 691 if (ml->ml_flags & MAC_LOMAC_FLAG_AUX) { 692 if (sbuf_putc(sb, '[') == -1) 693 return (EINVAL); 694 695 if (lomac_element_to_string(sb, &ml->ml_auxsingle) == -1) 696 return (EINVAL); 697 698 if (sbuf_putc(sb, ']') == -1) 699 return (EINVAL); 700 } 701 702 if (ml->ml_flags & MAC_LOMAC_FLAG_RANGE) { 703 if (sbuf_putc(sb, '(') == -1) 704 return (EINVAL); 705 706 if (lomac_element_to_string(sb, &ml->ml_rangelow) == -1) 707 return (EINVAL); 708 709 if (sbuf_putc(sb, '-') == -1) 710 return (EINVAL); 711 712 if (lomac_element_to_string(sb, &ml->ml_rangehigh) == -1) 713 return (EINVAL); 714 715 if (sbuf_putc(sb, ')') == -1) 716 return (EINVAL); 717 } 718 719 return (0); 720} 721 722static int 723lomac_externalize_label(struct label *label, char *element_name, 724 struct sbuf *sb, int *claimed) 725{ 726 struct mac_lomac *ml; 727 728 if (strcmp(MAC_LOMAC_LABEL_NAME, element_name) != 0) 729 return (0); 730 731 (*claimed)++; 732 733 ml = SLOT(label); 734 735 return (lomac_to_string(sb, ml)); 736} 737 738static int 739lomac_parse_element(struct mac_lomac_element *element, char *string) 740{ 741 742 if (strcmp(string, "high") == 0 || strcmp(string, "hi") == 0) { 743 element->mle_type = MAC_LOMAC_TYPE_HIGH; 744 element->mle_grade = MAC_LOMAC_TYPE_UNDEF; 745 } else if (strcmp(string, "low") == 0 || strcmp(string, "lo") == 0) { 746 element->mle_type = MAC_LOMAC_TYPE_LOW; 747 element->mle_grade = MAC_LOMAC_TYPE_UNDEF; 748 } else if (strcmp(string, "equal") == 0 || strcmp(string, "eq") == 0) 749 { 750 element->mle_type = MAC_LOMAC_TYPE_EQUAL; 751 element->mle_grade = MAC_LOMAC_TYPE_UNDEF; 752 } else { 753 char *p0, *p1; 754 int d; 755 756 p0 = string; 757 d = strtol(p0, &p1, 10); 758 759 if (d < 0 || d > 65535) 760 return (EINVAL); 761 element->mle_type = MAC_LOMAC_TYPE_GRADE; 762 element->mle_grade = d; 763 764 if (p1 == p0 || *p1 != '\0') 765 return (EINVAL); 766 } 767 768 return (0); 769} 770 771/* 772 * Note: destructively consumes the string, make a local copy before calling 773 * if that's a problem. 774 */ 775static int 776lomac_parse(struct mac_lomac *ml, char *string) 777{ 778 char *range, *rangeend, *rangehigh, *rangelow, *single, *auxsingle, 779 *auxsingleend; 780 int error; 781 782 /* Do we have a range? */ 783 single = string; 784 range = index(string, '('); 785 if (range == single) 786 single = NULL; 787 auxsingle = index(string, '['); 788 if (auxsingle == single) 789 single = NULL; 790 if (range != NULL && auxsingle != NULL) 791 return (EINVAL); 792 rangelow = rangehigh = NULL; 793 if (range != NULL) { 794 /* Nul terminate the end of the single string. */ 795 *range = '\0'; 796 range++; 797 rangelow = range; 798 rangehigh = index(rangelow, '-'); 799 if (rangehigh == NULL) 800 return (EINVAL); 801 rangehigh++; 802 if (*rangelow == '\0' || *rangehigh == '\0') 803 return (EINVAL); 804 rangeend = index(rangehigh, ')'); 805 if (rangeend == NULL) 806 return (EINVAL); 807 if (*(rangeend + 1) != '\0') 808 return (EINVAL); 809 /* Nul terminate the ends of the ranges. */ 810 *(rangehigh - 1) = '\0'; 811 *rangeend = '\0'; 812 } 813 KASSERT((rangelow != NULL && rangehigh != NULL) || 814 (rangelow == NULL && rangehigh == NULL), 815 ("lomac_internalize_label: range mismatch")); 816 if (auxsingle != NULL) { 817 /* Nul terminate the end of the single string. */ 818 *auxsingle = '\0'; 819 auxsingle++; 820 auxsingleend = index(auxsingle, ']'); 821 if (auxsingleend == NULL) 822 return (EINVAL); 823 if (*(auxsingleend + 1) != '\0') 824 return (EINVAL); 825 /* Nul terminate the end of the auxsingle. */ 826 *auxsingleend = '\0'; 827 } 828 829 bzero(ml, sizeof(*ml)); 830 if (single != NULL) { 831 error = lomac_parse_element(&ml->ml_single, single); 832 if (error) 833 return (error); 834 ml->ml_flags |= MAC_LOMAC_FLAG_SINGLE; 835 } 836 837 if (auxsingle != NULL) { 838 error = lomac_parse_element(&ml->ml_auxsingle, 839 auxsingle); 840 if (error) 841 return (error); 842 ml->ml_flags |= MAC_LOMAC_FLAG_AUX; 843 } 844 845 if (rangelow != NULL) { 846 error = lomac_parse_element(&ml->ml_rangelow, rangelow); 847 if (error) 848 return (error); 849 error = lomac_parse_element(&ml->ml_rangehigh, rangehigh); 850 if (error) 851 return (error); 852 ml->ml_flags |= MAC_LOMAC_FLAG_RANGE; 853 } 854 855 error = lomac_valid(ml); 856 if (error) 857 return (error); 858 859 return (0); 860} 861 862static int 863lomac_internalize_label(struct label *label, char *element_name, 864 char *element_data, int *claimed) 865{ 866 struct mac_lomac *ml, ml_temp; 867 int error; 868 869 if (strcmp(MAC_LOMAC_LABEL_NAME, element_name) != 0) 870 return (0); 871 872 (*claimed)++; 873 874 error = lomac_parse(&ml_temp, element_data); 875 if (error) 876 return (error); 877 878 ml = SLOT(label); 879 *ml = ml_temp; 880 881 return (0); 882} 883 884static void 885lomac_copy_label(struct label *src, struct label *dest) 886{ 887 888 *SLOT(dest) = *SLOT(src); 889} 890 891/* 892 * Labeling event operations: file system objects, and things that look a lot 893 * like file system objects. 894 */ 895static void 896lomac_devfs_create_device(struct ucred *cred, struct mount *mp, 897 struct cdev *dev, struct devfs_dirent *de, struct label *delabel) 898{ 899 struct mac_lomac *ml; 900 int lomac_type; 901 902 ml = SLOT(delabel); 903 if (strcmp(dev->si_name, "null") == 0 || 904 strcmp(dev->si_name, "zero") == 0 || 905 strcmp(dev->si_name, "random") == 0 || 906 strncmp(dev->si_name, "fd/", strlen("fd/")) == 0 || 907 strncmp(dev->si_name, "ttyv", strlen("ttyv")) == 0) 908 lomac_type = MAC_LOMAC_TYPE_EQUAL; 909 else if (ptys_equal && 910 (strncmp(dev->si_name, "ttyp", strlen("ttyp")) == 0 || 911 strncmp(dev->si_name, "ptyp", strlen("ptyp")) == 0)) 912 lomac_type = MAC_LOMAC_TYPE_EQUAL; 913 else 914 lomac_type = MAC_LOMAC_TYPE_HIGH; 915 lomac_set_single(ml, lomac_type, 0); 916} 917 918static void 919lomac_devfs_create_directory(struct mount *mp, char *dirname, int dirnamelen, 920 struct devfs_dirent *de, struct label *delabel) 921{ 922 struct mac_lomac *ml; 923 924 ml = SLOT(delabel); 925 lomac_set_single(ml, MAC_LOMAC_TYPE_HIGH, 0); 926} 927 928static void 929lomac_devfs_create_symlink(struct ucred *cred, struct mount *mp, 930 struct devfs_dirent *dd, struct label *ddlabel, struct devfs_dirent *de, 931 struct label *delabel) 932{ 933 struct mac_lomac *source, *dest; 934 935 source = SLOT(cred->cr_label); 936 dest = SLOT(delabel); 937 938 lomac_copy_single(source, dest); 939} 940 941static void 942lomac_mount_create(struct ucred *cred, struct mount *mp, 943 struct label *mplabel) 944{ 945 struct mac_lomac *source, *dest; 946 947 source = SLOT(cred->cr_label); 948 dest = SLOT(mplabel); 949 lomac_copy_single(source, dest); 950} 951 952static void 953lomac_vnode_relabel(struct ucred *cred, struct vnode *vp, 954 struct label *vplabel, struct label *newlabel) 955{ 956 struct mac_lomac *source, *dest; 957 958 source = SLOT(newlabel); 959 dest = SLOT(vplabel); 960 961 try_relabel(source, dest); 962} 963 964static void 965lomac_devfs_update(struct mount *mp, struct devfs_dirent *de, 966 struct label *delabel, struct vnode *vp, struct label *vplabel) 967{ 968 struct mac_lomac *source, *dest; 969 970 source = SLOT(vplabel); 971 dest = SLOT(delabel); 972 973 lomac_copy(source, dest); 974} 975 976static void 977lomac_devfs_vnode_associate(struct mount *mp, struct label *mplabel, 978 struct devfs_dirent *de, struct label *delabel, struct vnode *vp, 979 struct label *vplabel) 980{ 981 struct mac_lomac *source, *dest; 982 983 source = SLOT(delabel); 984 dest = SLOT(vplabel); 985 986 lomac_copy_single(source, dest); 987} 988 989static int 990lomac_vnode_associate_extattr(struct mount *mp, struct label *mplabel, 991 struct vnode *vp, struct label *vplabel) 992{ 993 struct mac_lomac ml_temp, *source, *dest; 994 int buflen, error; 995 996 source = SLOT(mplabel); 997 dest = SLOT(vplabel); 998 999 buflen = sizeof(ml_temp); 1000 bzero(&ml_temp, buflen); 1001 1002 error = vn_extattr_get(vp, IO_NODELOCKED, MAC_LOMAC_EXTATTR_NAMESPACE, 1003 MAC_LOMAC_EXTATTR_NAME, &buflen, (char *)&ml_temp, curthread); 1004 if (error == ENOATTR || error == EOPNOTSUPP) { 1005 /* Fall back to the mntlabel. */ 1006 lomac_copy_single(source, dest); 1007 return (0); 1008 } else if (error) 1009 return (error); 1010 1011 if (buflen != sizeof(ml_temp)) { 1012 if (buflen != sizeof(ml_temp) - sizeof(ml_temp.ml_auxsingle)) { 1013 printf("lomac_vnode_associate_extattr: bad size %d\n", 1014 buflen); 1015 return (EPERM); 1016 } 1017 bzero(&ml_temp.ml_auxsingle, sizeof(ml_temp.ml_auxsingle)); 1018 buflen = sizeof(ml_temp); 1019 (void)vn_extattr_set(vp, IO_NODELOCKED, 1020 MAC_LOMAC_EXTATTR_NAMESPACE, MAC_LOMAC_EXTATTR_NAME, 1021 buflen, (char *)&ml_temp, curthread); 1022 } 1023 if (lomac_valid(&ml_temp) != 0) { 1024 printf("lomac_vnode_associate_extattr: invalid\n"); 1025 return (EPERM); 1026 } 1027 if ((ml_temp.ml_flags & MAC_LOMAC_FLAGS_BOTH) != 1028 MAC_LOMAC_FLAG_SINGLE) { 1029 printf("lomac_vnode_associate_extattr: not single\n"); 1030 return (EPERM); 1031 } 1032 1033 lomac_copy_single(&ml_temp, dest); 1034 return (0); 1035} 1036 1037static void 1038lomac_vnode_associate_singlelabel(struct mount *mp, struct label *mplabel, 1039 struct vnode *vp, struct label *vplabel) 1040{ 1041 struct mac_lomac *source, *dest; 1042 1043 source = SLOT(mplabel); 1044 dest = SLOT(vplabel); 1045 1046 lomac_copy_single(source, dest); 1047} 1048 1049static int 1050lomac_vnode_create_extattr(struct ucred *cred, struct mount *mp, 1051 struct label *mplabel, struct vnode *dvp, struct label *dvplabel, 1052 struct vnode *vp, struct label *vplabel, struct componentname *cnp) 1053{ 1054 struct mac_lomac *source, *dest, *dir, temp; 1055 size_t buflen; 1056 int error; 1057 1058 buflen = sizeof(temp); 1059 bzero(&temp, buflen); 1060 1061 source = SLOT(cred->cr_label); 1062 dest = SLOT(vplabel); 1063 dir = SLOT(dvplabel); 1064 if (dir->ml_flags & MAC_LOMAC_FLAG_AUX) { 1065 lomac_copy_auxsingle(dir, &temp); 1066 lomac_set_single(&temp, dir->ml_auxsingle.mle_type, 1067 dir->ml_auxsingle.mle_grade); 1068 } else { 1069 lomac_copy_single(source, &temp); 1070 } 1071 1072 error = vn_extattr_set(vp, IO_NODELOCKED, MAC_LOMAC_EXTATTR_NAMESPACE, 1073 MAC_LOMAC_EXTATTR_NAME, buflen, (char *)&temp, curthread); 1074 if (error == 0) 1075 lomac_copy(&temp, dest); 1076 return (error); 1077} 1078 1079static int 1080lomac_vnode_setlabel_extattr(struct ucred *cred, struct vnode *vp, 1081 struct label *vplabel, struct label *intlabel) 1082{ 1083 struct mac_lomac *source, temp; 1084 size_t buflen; 1085 int error; 1086 1087 buflen = sizeof(temp); 1088 bzero(&temp, buflen); 1089 1090 source = SLOT(intlabel); 1091 if ((source->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0) 1092 return (0); 1093 1094 lomac_copy_single(source, &temp); 1095 error = vn_extattr_set(vp, IO_NODELOCKED, MAC_LOMAC_EXTATTR_NAMESPACE, 1096 MAC_LOMAC_EXTATTR_NAME, buflen, (char *)&temp, curthread); 1097 return (error); 1098} 1099 1100/* 1101 * Labeling event operations: IPC object. 1102 */ 1103static void 1104lomac_inpcb_create(struct socket *so, struct label *solabel, 1105 struct inpcb *inp, struct label *inplabel) 1106{ 1107 struct mac_lomac *source, *dest; 1108 1109 source = SLOT(solabel); 1110 dest = SLOT(inplabel); 1111 1112 lomac_copy_single(source, dest); 1113} 1114 1115static void 1116lomac_socket_create_mbuf(struct socket *so, struct label *solabel, 1117 struct mbuf *m, struct label *mlabel) 1118{ 1119 struct mac_lomac *source, *dest; 1120 1121 source = SLOT(solabel); 1122 dest = SLOT(mlabel); 1123 1124 lomac_copy_single(source, dest); 1125} 1126 1127static void 1128lomac_socket_create(struct ucred *cred, struct socket *so, 1129 struct label *solabel) 1130{ 1131 struct mac_lomac *source, *dest; 1132 1133 source = SLOT(cred->cr_label); 1134 dest = SLOT(solabel); 1135 1136 lomac_copy_single(source, dest); 1137} 1138 1139static void 1140lomac_pipe_create(struct ucred *cred, struct pipepair *pp, 1141 struct label *pplabel) 1142{ 1143 struct mac_lomac *source, *dest; 1144 1145 source = SLOT(cred->cr_label); 1146 dest = SLOT(pplabel); 1147 1148 lomac_copy_single(source, dest); 1149} 1150 1151static void 1152lomac_socket_newconn(struct socket *oldso, struct label *oldsolabel, 1153 struct socket *newso, struct label *newsolabel) 1154{ 1155 struct mac_lomac *source, *dest; 1156 1157 source = SLOT(oldsolabel); 1158 dest = SLOT(newsolabel); 1159 1160 lomac_copy_single(source, dest); 1161} 1162 1163static void 1164lomac_socket_relabel(struct ucred *cred, struct socket *so, 1165 struct label *solabel, struct label *newlabel) 1166{ 1167 struct mac_lomac *source, *dest; 1168 1169 source = SLOT(newlabel); 1170 dest = SLOT(solabel); 1171 1172 try_relabel(source, dest); 1173} 1174 1175static void 1176lomac_pipe_relabel(struct ucred *cred, struct pipepair *pp, 1177 struct label *pplabel, struct label *newlabel) 1178{ 1179 struct mac_lomac *source, *dest; 1180 1181 source = SLOT(newlabel); 1182 dest = SLOT(pplabel); 1183 1184 try_relabel(source, dest); 1185} 1186 1187static void 1188lomac_socketpeer_set_from_mbuf(struct mbuf *m, struct label *mlabel, 1189 struct socket *so, struct label *sopeerlabel) 1190{ 1191 struct mac_lomac *source, *dest; 1192 1193 source = SLOT(mlabel); 1194 dest = SLOT(sopeerlabel); 1195 1196 lomac_copy_single(source, dest); 1197} 1198 1199/* 1200 * Labeling event operations: network objects. 1201 */ 1202static void 1203lomac_socketpeer_set_from_socket(struct socket *oldso, 1204 struct label *oldsolabel, struct socket *newso, 1205 struct label *newsopeerlabel) 1206{ 1207 struct mac_lomac *source, *dest; 1208 1209 source = SLOT(oldsolabel); 1210 dest = SLOT(newsopeerlabel); 1211 1212 lomac_copy_single(source, dest); 1213} 1214 1215static void 1216lomac_bpfdesc_create(struct ucred *cred, struct bpf_d *d, 1217 struct label *dlabel) 1218{ 1219 struct mac_lomac *source, *dest; 1220 1221 source = SLOT(cred->cr_label); 1222 dest = SLOT(dlabel); 1223 1224 lomac_copy_single(source, dest); 1225} 1226 1227static void 1228lomac_ifnet_create(struct ifnet *ifp, struct label *ifplabel) 1229{ 1230 char tifname[IFNAMSIZ], *p, *q; 1231 char tiflist[sizeof(trusted_interfaces)]; 1232 struct mac_lomac *dest; 1233 int len, grade; 1234 1235 dest = SLOT(ifplabel); 1236 1237 if (ifp->if_type == IFT_LOOP) { 1238 grade = MAC_LOMAC_TYPE_EQUAL; 1239 goto set; 1240 } 1241 1242 if (trust_all_interfaces) { 1243 grade = MAC_LOMAC_TYPE_HIGH; 1244 goto set; 1245 } 1246 1247 grade = MAC_LOMAC_TYPE_LOW; 1248 1249 if (trusted_interfaces[0] == '\0' || 1250 !strvalid(trusted_interfaces, sizeof(trusted_interfaces))) 1251 goto set; 1252 1253 bzero(tiflist, sizeof(tiflist)); 1254 for (p = trusted_interfaces, q = tiflist; *p != '\0'; p++, q++) 1255 if(*p != ' ' && *p != '\t') 1256 *q = *p; 1257 1258 for (p = q = tiflist;; p++) { 1259 if (*p == ',' || *p == '\0') { 1260 len = p - q; 1261 if (len < IFNAMSIZ) { 1262 bzero(tifname, sizeof(tifname)); 1263 bcopy(q, tifname, len); 1264 if (strcmp(tifname, ifp->if_xname) == 0) { 1265 grade = MAC_LOMAC_TYPE_HIGH; 1266 break; 1267 } 1268 } 1269 else { 1270 *p = '\0'; 1271 printf("MAC/LOMAC warning: interface name " 1272 "\"%s\" is too long (must be < %d)\n", 1273 q, IFNAMSIZ); 1274 } 1275 if (*p == '\0') 1276 break; 1277 q = p + 1; 1278 } 1279 } 1280set: 1281 lomac_set_single(dest, grade, 0); 1282 lomac_set_range(dest, grade, 0, grade, 0); 1283} 1284 1285static void 1286lomac_ipq_create(struct mbuf *m, struct label *mlabel, struct ipq *ipq, 1287 struct label *ipqlabel) 1288{ 1289 struct mac_lomac *source, *dest; 1290 1291 source = SLOT(mlabel); 1292 dest = SLOT(ipqlabel); 1293 1294 lomac_copy_single(source, dest); 1295} 1296 1297static void 1298lomac_ipq_reassemble(struct ipq *ipq, struct label *ipqlabel, 1299 struct mbuf *m, struct label *mlabel) 1300{ 1301 struct mac_lomac *source, *dest; 1302 1303 source = SLOT(ipqlabel); 1304 dest = SLOT(mlabel); 1305 1306 /* Just use the head, since we require them all to match. */ 1307 lomac_copy_single(source, dest); 1308} 1309 1310static void 1311lomac_netinet_fragment(struct mbuf *m, struct label *mlabel, 1312 struct mbuf *frag, struct label *fraglabel) 1313{ 1314 struct mac_lomac *source, *dest; 1315 1316 source = SLOT(mlabel); 1317 dest = SLOT(fraglabel); 1318 1319 lomac_copy_single(source, dest); 1320} 1321 1322static void 1323lomac_inpcb_create_mbuf(struct inpcb *inp, struct label *inplabel, 1324 struct mbuf *m, struct label *mlabel) 1325{ 1326 struct mac_lomac *source, *dest; 1327 1328 source = SLOT(inplabel); 1329 dest = SLOT(mlabel); 1330 1331 lomac_copy_single(source, dest); 1332} 1333 1334static void 1335lomac_create_mbuf_linklayer(struct ifnet *ifp, struct label *ifplabel, 1336 struct mbuf *m, struct label *mlabel) 1337{ 1338 struct mac_lomac *dest; 1339 1340 dest = SLOT(mlabel); 1341 1342 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0); 1343} 1344 1345static void 1346lomac_bpfdesc_create_mbuf(struct bpf_d *d, struct label *dlabel, 1347 struct mbuf *m, struct label *mlabel) 1348{ 1349 struct mac_lomac *source, *dest; 1350 1351 source = SLOT(dlabel); 1352 dest = SLOT(mlabel); 1353 1354 lomac_copy_single(source, dest); 1355} 1356 1357static void 1358lomac_ifnet_create_mbuf(struct ifnet *ifp, struct label *ifplabel, 1359 struct mbuf *m, struct label *mlabel) 1360{ 1361 struct mac_lomac *source, *dest; 1362 1363 source = SLOT(ifplabel); 1364 dest = SLOT(mlabel); 1365 1366 lomac_copy_single(source, dest); 1367} 1368 1369static void 1370lomac_mbuf_create_multicast_encap(struct mbuf *m, struct label *mlabel, 1371 struct ifnet *ifp, struct label *ifplabel, struct mbuf *mnew, 1372 struct label *mnewlabel) 1373{ 1374 struct mac_lomac *source, *dest; 1375 1376 source = SLOT(mlabel); 1377 dest = SLOT(mnewlabel); 1378 1379 lomac_copy_single(source, dest); 1380} 1381 1382static void 1383lomac_mbuf_create_netlayer(struct mbuf *m, struct label *mlabel, 1384 struct mbuf *mnew, struct label *mnewlabel) 1385{ 1386 struct mac_lomac *source, *dest; 1387 1388 source = SLOT(mlabel); 1389 dest = SLOT(mnewlabel); 1390 1391 lomac_copy_single(source, dest); 1392} 1393 1394static int 1395lomac_ipq_match(struct mbuf *m, struct label *mlabel, struct ipq *ipq, 1396 struct label *ipqlabel) 1397{ 1398 struct mac_lomac *a, *b; 1399 1400 a = SLOT(ipqlabel); 1401 b = SLOT(mlabel); 1402 1403 return (lomac_equal_single(a, b)); 1404} 1405 1406static void 1407lomac_ifnet_relabel(struct ucred *cred, struct ifnet *ifp, 1408 struct label *ifplabel, struct label *newlabel) 1409{ 1410 struct mac_lomac *source, *dest; 1411 1412 source = SLOT(newlabel); 1413 dest = SLOT(ifplabel); 1414 1415 try_relabel(source, dest); 1416} 1417 1418static void 1419lomac_ipq_update(struct mbuf *m, struct label *mlabel, struct ipq *ipq, 1420 struct label *ipqlabel) 1421{ 1422 1423 /* NOOP: we only accept matching labels, so no need to update */ 1424} 1425 1426static void 1427lomac_inpcb_sosetlabel(struct socket *so, struct label *solabel, 1428 struct inpcb *inp, struct label *inplabel) 1429{ 1430 struct mac_lomac *source, *dest; 1431 1432 source = SLOT(solabel); 1433 dest = SLOT(inplabel); 1434 1435 lomac_copy_single(source, dest); 1436} 1437 1438static void 1439lomac_init_syncache_from_inpcb(struct label *label, struct inpcb *inp) 1440{ 1441 struct mac_lomac *source, *dest; 1442 1443 source = SLOT(inp->inp_label); 1444 dest = SLOT(label); 1445 lomac_copy(source, dest); 1446} 1447 1448static void 1449lomac_create_mbuf_from_syncache(struct label *sc_label, struct mbuf *m, 1450 struct label *mlabel) 1451{ 1452 struct mac_lomac *source, *dest; 1453 1454 source = SLOT(sc_label); 1455 dest = SLOT(mlabel); 1456 lomac_copy(source, dest); 1457} 1458 1459static void 1460lomac_mbuf_create_from_firewall(struct mbuf *m, struct label *mlabel) 1461{ 1462 struct mac_lomac *dest; 1463 1464 dest = SLOT(mlabel); 1465 1466 /* XXX: where is the label for the firewall really comming from? */ 1467 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0); 1468} 1469 1470/* 1471 * Labeling event operations: processes. 1472 */ 1473static void 1474lomac_vnode_execve_transition(struct ucred *old, struct ucred *new, 1475 struct vnode *vp, struct label *vplabel, struct label *interpvplabel, 1476 struct image_params *imgp, struct label *execlabel) 1477{ 1478 struct mac_lomac *source, *dest, *obj, *robj; 1479 1480 source = SLOT(old->cr_label); 1481 dest = SLOT(new->cr_label); 1482 obj = SLOT(vplabel); 1483 robj = interpvplabel != NULL ? SLOT(interpvplabel) : obj; 1484 1485 lomac_copy(source, dest); 1486 /* 1487 * If there's an auxiliary label on the real object, respect it and 1488 * assume that this level should be assumed immediately if a higher 1489 * level is currently in place. 1490 */ 1491 if (robj->ml_flags & MAC_LOMAC_FLAG_AUX && 1492 !lomac_dominate_element(&robj->ml_auxsingle, &dest->ml_single) 1493 && lomac_auxsingle_in_range(robj, dest)) 1494 lomac_set_single(dest, robj->ml_auxsingle.mle_type, 1495 robj->ml_auxsingle.mle_grade); 1496 /* 1497 * Restructuring to use the execve transitioning mechanism instead of 1498 * the normal demotion mechanism here would be difficult, so just 1499 * copy the label over and perform standard demotion. This is also 1500 * non-optimal because it will result in the intermediate label "new" 1501 * being created and immediately recycled. 1502 */ 1503 if (lomac_enabled && revocation_enabled && 1504 !lomac_dominate_single(obj, source)) 1505 (void)maybe_demote(source, obj, "executing", "file", vp); 1506} 1507 1508static int 1509lomac_vnode_execve_will_transition(struct ucred *old, struct vnode *vp, 1510 struct label *vplabel, struct label *interpvplabel, 1511 struct image_params *imgp, struct label *execlabel) 1512{ 1513 struct mac_lomac *subj, *obj, *robj; 1514 1515 if (!lomac_enabled || !revocation_enabled) 1516 return (0); 1517 1518 subj = SLOT(old->cr_label); 1519 obj = SLOT(vplabel); 1520 robj = interpvplabel != NULL ? SLOT(interpvplabel) : obj; 1521 1522 return ((robj->ml_flags & MAC_LOMAC_FLAG_AUX && 1523 !lomac_dominate_element(&robj->ml_auxsingle, &subj->ml_single) 1524 && lomac_auxsingle_in_range(robj, subj)) || 1525 !lomac_dominate_single(obj, subj)); 1526} 1527 1528static void 1529lomac_proc_create_swapper(struct ucred *cred) 1530{ 1531 struct mac_lomac *dest; 1532 1533 dest = SLOT(cred->cr_label); 1534 1535 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0); 1536 lomac_set_range(dest, MAC_LOMAC_TYPE_LOW, 0, MAC_LOMAC_TYPE_HIGH, 0); 1537} 1538 1539static void 1540lomac_proc_create_init(struct ucred *cred) 1541{ 1542 struct mac_lomac *dest; 1543 1544 dest = SLOT(cred->cr_label); 1545 1546 lomac_set_single(dest, MAC_LOMAC_TYPE_HIGH, 0); 1547 lomac_set_range(dest, MAC_LOMAC_TYPE_LOW, 0, MAC_LOMAC_TYPE_HIGH, 0); 1548} 1549 1550static void 1551lomac_cred_relabel(struct ucred *cred, struct label *newlabel) 1552{ 1553 struct mac_lomac *source, *dest; 1554 1555 source = SLOT(newlabel); 1556 dest = SLOT(cred->cr_label); 1557 1558 try_relabel(source, dest); 1559} 1560 1561/* 1562 * Access control checks. 1563 */ 1564static int 1565lomac_bpfdesc_check_receive(struct bpf_d *d, struct label *dlabel, 1566 struct ifnet *ifp, struct label *ifplabel) 1567{ 1568 struct mac_lomac *a, *b; 1569 1570 if (!lomac_enabled) 1571 return (0); 1572 1573 a = SLOT(dlabel); 1574 b = SLOT(ifplabel); 1575 1576 if (lomac_equal_single(a, b)) 1577 return (0); 1578 return (EACCES); 1579} 1580 1581static int 1582lomac_cred_check_relabel(struct ucred *cred, struct label *newlabel) 1583{ 1584 struct mac_lomac *subj, *new; 1585 int error; 1586 1587 subj = SLOT(cred->cr_label); 1588 new = SLOT(newlabel); 1589 1590 /* 1591 * If there is a LOMAC label update for the credential, it may be an 1592 * update of the single, range, or both. 1593 */ 1594 error = lomac_atmostflags(new, MAC_LOMAC_FLAGS_BOTH); 1595 if (error) 1596 return (error); 1597 1598 /* 1599 * If the LOMAC label is to be changed, authorize as appropriate. 1600 */ 1601 if (new->ml_flags & MAC_LOMAC_FLAGS_BOTH) { 1602 /* 1603 * Fill in the missing parts from the previous label. 1604 */ 1605 if ((new->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0) 1606 lomac_copy_single(subj, new); 1607 if ((new->ml_flags & MAC_LOMAC_FLAG_RANGE) == 0) 1608 lomac_copy_range(subj, new); 1609 1610 /* 1611 * To change the LOMAC range on a credential, the new range 1612 * label must be in the current range. 1613 */ 1614 if (!lomac_range_in_range(new, subj)) 1615 return (EPERM); 1616 1617 /* 1618 * To change the LOMAC single label on a credential, the new 1619 * single label must be in the new range. Implicitly from 1620 * the previous check, the new single is in the old range. 1621 */ 1622 if (!lomac_single_in_range(new, new)) 1623 return (EPERM); 1624 1625 /* 1626 * To have EQUAL in any component of the new credential LOMAC 1627 * label, the subject must already have EQUAL in their label. 1628 */ 1629 if (lomac_contains_equal(new)) { 1630 error = lomac_subject_privileged(subj); 1631 if (error) 1632 return (error); 1633 } 1634 1635 /* 1636 * XXXMAC: Additional consistency tests regarding the single 1637 * and range of the new label might be performed here. 1638 */ 1639 } 1640 1641 return (0); 1642} 1643 1644static int 1645lomac_cred_check_visible(struct ucred *cr1, struct ucred *cr2) 1646{ 1647 struct mac_lomac *subj, *obj; 1648 1649 if (!lomac_enabled) 1650 return (0); 1651 1652 subj = SLOT(cr1->cr_label); 1653 obj = SLOT(cr2->cr_label); 1654 1655 /* XXX: range */ 1656 if (!lomac_dominate_single(obj, subj)) 1657 return (ESRCH); 1658 1659 return (0); 1660} 1661 1662static int 1663lomac_ifnet_check_relabel(struct ucred *cred, struct ifnet *ifp, 1664 struct label *ifplabel, struct label *newlabel) 1665{ 1666 struct mac_lomac *subj, *new; 1667 int error; 1668 1669 subj = SLOT(cred->cr_label); 1670 new = SLOT(newlabel); 1671 1672 /* 1673 * If there is a LOMAC label update for the interface, it may be an 1674 * update of the single, range, or both. 1675 */ 1676 error = lomac_atmostflags(new, MAC_LOMAC_FLAGS_BOTH); 1677 if (error) 1678 return (error); 1679 1680 /* 1681 * Relabling network interfaces requires LOMAC privilege. 1682 */ 1683 error = lomac_subject_privileged(subj); 1684 if (error) 1685 return (error); 1686 1687 /* 1688 * If the LOMAC label is to be changed, authorize as appropriate. 1689 */ 1690 if (new->ml_flags & MAC_LOMAC_FLAGS_BOTH) { 1691 /* 1692 * Fill in the missing parts from the previous label. 1693 */ 1694 if ((new->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0) 1695 lomac_copy_single(subj, new); 1696 if ((new->ml_flags & MAC_LOMAC_FLAG_RANGE) == 0) 1697 lomac_copy_range(subj, new); 1698 1699 /* 1700 * Rely on the traditional superuser status for the LOMAC 1701 * interface relabel requirements. XXXMAC: This will go 1702 * away. 1703 * 1704 * XXXRW: This is also redundant to a higher layer check. 1705 */ 1706 error = priv_check_cred(cred, PRIV_NET_SETIFMAC, 0); 1707 if (error) 1708 return (EPERM); 1709 1710 /* 1711 * XXXMAC: Additional consistency tests regarding the single 1712 * and the range of the new label might be performed here. 1713 */ 1714 } 1715 1716 return (0); 1717} 1718 1719static int 1720lomac_ifnet_check_transmit(struct ifnet *ifp, struct label *ifplabel, 1721 struct mbuf *m, struct label *mlabel) 1722{ 1723 struct mac_lomac *p, *i; 1724 1725 if (!lomac_enabled) 1726 return (0); 1727 1728 p = SLOT(mlabel); 1729 i = SLOT(ifplabel); 1730 1731 return (lomac_single_in_range(p, i) ? 0 : EACCES); 1732} 1733 1734static int 1735lomac_inpcb_check_deliver(struct inpcb *inp, struct label *inplabel, 1736 struct mbuf *m, struct label *mlabel) 1737{ 1738 struct mac_lomac *p, *i; 1739 1740 if (!lomac_enabled) 1741 return (0); 1742 1743 p = SLOT(mlabel); 1744 i = SLOT(inplabel); 1745 1746 return (lomac_equal_single(p, i) ? 0 : EACCES); 1747} 1748 1749static int 1750lomac_kld_check_load(struct ucred *cred, struct vnode *vp, 1751 struct label *vplabel) 1752{ 1753 struct mac_lomac *subj, *obj; 1754 1755 if (!lomac_enabled) 1756 return (0); 1757 1758 subj = SLOT(cred->cr_label); 1759 obj = SLOT(vplabel); 1760 1761 if (lomac_subject_privileged(subj)) 1762 return (EPERM); 1763 1764 if (!lomac_high_single(obj)) 1765 return (EACCES); 1766 1767 return (0); 1768} 1769 1770static int 1771lomac_pipe_check_ioctl(struct ucred *cred, struct pipepair *pp, 1772 struct label *pplabel, unsigned long cmd, void /* caddr_t */ *data) 1773{ 1774 1775 if (!lomac_enabled) 1776 return (0); 1777 1778 /* XXX: This will be implemented soon... */ 1779 1780 return (0); 1781} 1782 1783static int 1784lomac_pipe_check_read(struct ucred *cred, struct pipepair *pp, 1785 struct label *pplabel) 1786{ 1787 struct mac_lomac *subj, *obj; 1788 1789 if (!lomac_enabled) 1790 return (0); 1791 1792 subj = SLOT(cred->cr_label); 1793 obj = SLOT(pplabel); 1794 1795 if (!lomac_dominate_single(obj, subj)) 1796 return (maybe_demote(subj, obj, "reading", "pipe", NULL)); 1797 1798 return (0); 1799} 1800 1801static int 1802lomac_pipe_check_relabel(struct ucred *cred, struct pipepair *pp, 1803 struct label *pplabel, struct label *newlabel) 1804{ 1805 struct mac_lomac *subj, *obj, *new; 1806 int error; 1807 1808 new = SLOT(newlabel); 1809 subj = SLOT(cred->cr_label); 1810 obj = SLOT(pplabel); 1811 1812 /* 1813 * If there is a LOMAC label update for a pipe, it must be a single 1814 * update. 1815 */ 1816 error = lomac_atmostflags(new, MAC_LOMAC_FLAG_SINGLE); 1817 if (error) 1818 return (error); 1819 1820 /* 1821 * To perform a relabel of a pipe (LOMAC label or not), LOMAC must 1822 * authorize the relabel. 1823 */ 1824 if (!lomac_single_in_range(obj, subj)) 1825 return (EPERM); 1826 1827 /* 1828 * If the LOMAC label is to be changed, authorize as appropriate. 1829 */ 1830 if (new->ml_flags & MAC_LOMAC_FLAG_SINGLE) { 1831 /* 1832 * To change the LOMAC label on a pipe, the new pipe label 1833 * must be in the subject range. 1834 */ 1835 if (!lomac_single_in_range(new, subj)) 1836 return (EPERM); 1837 1838 /* 1839 * To change the LOMAC label on a pipe to be EQUAL, the 1840 * subject must have appropriate privilege. 1841 */ 1842 if (lomac_contains_equal(new)) { 1843 error = lomac_subject_privileged(subj); 1844 if (error) 1845 return (error); 1846 } 1847 } 1848 1849 return (0); 1850} 1851 1852static int 1853lomac_pipe_check_write(struct ucred *cred, struct pipepair *pp, 1854 struct label *pplabel) 1855{ 1856 struct mac_lomac *subj, *obj; 1857 1858 if (!lomac_enabled) 1859 return (0); 1860 1861 subj = SLOT(cred->cr_label); 1862 obj = SLOT(pplabel); 1863 1864 if (!lomac_subject_dominate(subj, obj)) 1865 return (EACCES); 1866 1867 return (0); 1868} 1869 1870static int 1871lomac_proc_check_debug(struct ucred *cred, struct proc *p) 1872{ 1873 struct mac_lomac *subj, *obj; 1874 1875 if (!lomac_enabled) 1876 return (0); 1877 1878 subj = SLOT(cred->cr_label); 1879 obj = SLOT(p->p_ucred->cr_label); 1880 1881 /* XXX: range checks */ 1882 if (!lomac_dominate_single(obj, subj)) 1883 return (ESRCH); 1884 if (!lomac_subject_dominate(subj, obj)) 1885 return (EACCES); 1886 1887 return (0); 1888} 1889 1890static int 1891lomac_proc_check_sched(struct ucred *cred, struct proc *p) 1892{ 1893 struct mac_lomac *subj, *obj; 1894 1895 if (!lomac_enabled) 1896 return (0); 1897 1898 subj = SLOT(cred->cr_label); 1899 obj = SLOT(p->p_ucred->cr_label); 1900 1901 /* XXX: range checks */ 1902 if (!lomac_dominate_single(obj, subj)) 1903 return (ESRCH); 1904 if (!lomac_subject_dominate(subj, obj)) 1905 return (EACCES); 1906 1907 return (0); 1908} 1909 1910static int 1911lomac_proc_check_signal(struct ucred *cred, struct proc *p, int signum) 1912{ 1913 struct mac_lomac *subj, *obj; 1914 1915 if (!lomac_enabled) 1916 return (0); 1917 1918 subj = SLOT(cred->cr_label); 1919 obj = SLOT(p->p_ucred->cr_label); 1920 1921 /* XXX: range checks */ 1922 if (!lomac_dominate_single(obj, subj)) 1923 return (ESRCH); 1924 if (!lomac_subject_dominate(subj, obj)) 1925 return (EACCES); 1926 1927 return (0); 1928} 1929 1930static int 1931lomac_socket_check_deliver(struct socket *so, struct label *solabel, 1932 struct mbuf *m, struct label *mlabel) 1933{ 1934 struct mac_lomac *p, *s; 1935 1936 if (!lomac_enabled) 1937 return (0); 1938 1939 p = SLOT(mlabel); 1940 s = SLOT(solabel); 1941 1942 return (lomac_equal_single(p, s) ? 0 : EACCES); 1943} 1944 1945static int 1946lomac_socket_check_relabel(struct ucred *cred, struct socket *so, 1947 struct label *solabel, struct label *newlabel) 1948{ 1949 struct mac_lomac *subj, *obj, *new; 1950 int error; 1951 1952 new = SLOT(newlabel); 1953 subj = SLOT(cred->cr_label); 1954 obj = SLOT(solabel); 1955 1956 /* 1957 * If there is a LOMAC label update for the socket, it may be an 1958 * update of single. 1959 */ 1960 error = lomac_atmostflags(new, MAC_LOMAC_FLAG_SINGLE); 1961 if (error) 1962 return (error); 1963 1964 /* 1965 * To relabel a socket, the old socket single must be in the subject 1966 * range. 1967 */ 1968 if (!lomac_single_in_range(obj, subj)) 1969 return (EPERM); 1970 1971 /* 1972 * If the LOMAC label is to be changed, authorize as appropriate. 1973 */ 1974 if (new->ml_flags & MAC_LOMAC_FLAG_SINGLE) { 1975 /* 1976 * To relabel a socket, the new socket single must be in the 1977 * subject range. 1978 */ 1979 if (!lomac_single_in_range(new, subj)) 1980 return (EPERM); 1981 1982 /* 1983 * To change the LOMAC label on the socket to contain EQUAL, 1984 * the subject must have appropriate privilege. 1985 */ 1986 if (lomac_contains_equal(new)) { 1987 error = lomac_subject_privileged(subj); 1988 if (error) 1989 return (error); 1990 } 1991 } 1992 1993 return (0); 1994} 1995 1996static int 1997lomac_socket_check_visible(struct ucred *cred, struct socket *so, 1998 struct label *solabel) 1999{ 2000 struct mac_lomac *subj, *obj; 2001 2002 if (!lomac_enabled) 2003 return (0); 2004 2005 subj = SLOT(cred->cr_label); 2006 obj = SLOT(solabel); 2007 2008 if (!lomac_dominate_single(obj, subj)) 2009 return (ENOENT); 2010 2011 return (0); 2012} 2013 2014/* 2015 * Some system privileges are allowed regardless of integrity grade; others 2016 * are allowed only when running with privilege with respect to the LOMAC 2017 * policy as they might otherwise allow bypassing of the integrity policy. 2018 */ 2019static int 2020lomac_priv_check(struct ucred *cred, int priv) 2021{ 2022 struct mac_lomac *subj; 2023 int error; 2024 2025 if (!lomac_enabled) 2026 return (0); 2027 2028 /* 2029 * Exempt only specific privileges from the LOMAC integrity policy. 2030 */ 2031 switch (priv) { 2032 case PRIV_KTRACE: 2033 case PRIV_MSGBUF: 2034 2035 /* 2036 * Allow processes to manipulate basic process audit properties, and 2037 * to submit audit records. 2038 */ 2039 case PRIV_AUDIT_GETAUDIT: 2040 case PRIV_AUDIT_SETAUDIT: 2041 case PRIV_AUDIT_SUBMIT: 2042 2043 /* 2044 * Allow processes to manipulate their regular UNIX credentials. 2045 */ 2046 case PRIV_CRED_SETUID: 2047 case PRIV_CRED_SETEUID: 2048 case PRIV_CRED_SETGID: 2049 case PRIV_CRED_SETEGID: 2050 case PRIV_CRED_SETGROUPS: 2051 case PRIV_CRED_SETREUID: 2052 case PRIV_CRED_SETREGID: 2053 case PRIV_CRED_SETRESUID: 2054 case PRIV_CRED_SETRESGID: 2055 2056 /* 2057 * Allow processes to perform system monitoring. 2058 */ 2059 case PRIV_SEEOTHERGIDS: 2060 case PRIV_SEEOTHERUIDS: 2061 break; 2062 2063 /* 2064 * Allow access to general process debugging facilities. We 2065 * separately control debugging based on MAC label. 2066 */ 2067 case PRIV_DEBUG_DIFFCRED: 2068 case PRIV_DEBUG_SUGID: 2069 case PRIV_DEBUG_UNPRIV: 2070 2071 /* 2072 * Allow manipulating jails. 2073 */ 2074 case PRIV_JAIL_ATTACH: 2075 2076 /* 2077 * Allow privilege with respect to the Partition policy, but not the 2078 * Privs policy. 2079 */ 2080 case PRIV_MAC_PARTITION: 2081 2082 /* 2083 * Allow privilege with respect to process resource limits and login 2084 * context. 2085 */ 2086 case PRIV_PROC_LIMIT: 2087 case PRIV_PROC_SETLOGIN: 2088 case PRIV_PROC_SETRLIMIT: 2089 2090 /* 2091 * Allow System V and POSIX IPC privileges. 2092 */ 2093 case PRIV_IPC_READ: 2094 case PRIV_IPC_WRITE: 2095 case PRIV_IPC_ADMIN: 2096 case PRIV_IPC_MSGSIZE: 2097 case PRIV_MQ_ADMIN: 2098 2099 /* 2100 * Allow certain scheduler manipulations -- possibly this should be 2101 * controlled by more fine-grained policy, as potentially low 2102 * integrity processes can deny CPU to higher integrity ones. 2103 */ 2104 case PRIV_SCHED_DIFFCRED: 2105 case PRIV_SCHED_SETPRIORITY: 2106 case PRIV_SCHED_RTPRIO: 2107 case PRIV_SCHED_SETPOLICY: 2108 case PRIV_SCHED_SET: 2109 case PRIV_SCHED_SETPARAM: 2110 2111 /* 2112 * More IPC privileges. 2113 */ 2114 case PRIV_SEM_WRITE: 2115 2116 /* 2117 * Allow signaling privileges subject to integrity policy. 2118 */ 2119 case PRIV_SIGNAL_DIFFCRED: 2120 case PRIV_SIGNAL_SUGID: 2121 2122 /* 2123 * Allow access to only limited sysctls from lower integrity levels; 2124 * piggy-back on the Jail definition. 2125 */ 2126 case PRIV_SYSCTL_WRITEJAIL: 2127 2128 /* 2129 * Allow TTY-based privileges, subject to general device access using 2130 * labels on TTY device nodes, but not console privilege. 2131 */ 2132 case PRIV_TTY_DRAINWAIT: 2133 case PRIV_TTY_DTRWAIT: 2134 case PRIV_TTY_EXCLUSIVE: 2135 case PRIV_TTY_PRISON: 2136 case PRIV_TTY_STI: 2137 case PRIV_TTY_SETA: 2138 2139 /* 2140 * Grant most VFS privileges, as almost all are in practice bounded 2141 * by more specific checks using labels. 2142 */ 2143 case PRIV_VFS_READ: 2144 case PRIV_VFS_WRITE: 2145 case PRIV_VFS_ADMIN: 2146 case PRIV_VFS_EXEC: 2147 case PRIV_VFS_LOOKUP: 2148 case PRIV_VFS_CHFLAGS_DEV: 2149 case PRIV_VFS_CHOWN: 2150 case PRIV_VFS_CHROOT: 2151 case PRIV_VFS_RETAINSUGID: 2152 case PRIV_VFS_EXCEEDQUOTA: 2153 case PRIV_VFS_FCHROOT: 2154 case PRIV_VFS_FHOPEN: 2155 case PRIV_VFS_FHSTATFS: 2156 case PRIV_VFS_GENERATION: 2157 case PRIV_VFS_GETFH: 2158 case PRIV_VFS_GETQUOTA: 2159 case PRIV_VFS_LINK: 2160 case PRIV_VFS_MOUNT: 2161 case PRIV_VFS_MOUNT_OWNER: 2162 case PRIV_VFS_MOUNT_PERM: 2163 case PRIV_VFS_MOUNT_SUIDDIR: 2164 case PRIV_VFS_MOUNT_NONUSER: 2165 case PRIV_VFS_SETGID: 2166 case PRIV_VFS_STICKYFILE: 2167 case PRIV_VFS_SYSFLAGS: 2168 case PRIV_VFS_UNMOUNT: 2169 2170 /* 2171 * Allow VM privileges; it would be nice if these were subject to 2172 * resource limits. 2173 */ 2174 case PRIV_VM_MADV_PROTECT: 2175 case PRIV_VM_MLOCK: 2176 case PRIV_VM_MUNLOCK: 2177 2178 /* 2179 * Allow some but not all network privileges. In general, dont allow 2180 * reconfiguring the network stack, just normal use. 2181 */ 2182 case PRIV_NETATALK_RESERVEDPORT: 2183 case PRIV_NETINET_RESERVEDPORT: 2184 case PRIV_NETINET_RAW: 2185 case PRIV_NETINET_REUSEPORT: 2186 case PRIV_NETIPX_RESERVEDPORT: 2187 case PRIV_NETIPX_RAW: 2188 break; 2189 2190 /* 2191 * All remaining system privileges are allow only if the process 2192 * holds privilege with respect to the LOMAC policy. 2193 */ 2194 default: 2195 subj = SLOT(cred->cr_label); 2196 error = lomac_subject_privileged(subj); 2197 if (error) 2198 return (error); 2199 } 2200 return (0); 2201} 2202 2203 2204static int 2205lomac_system_check_acct(struct ucred *cred, struct vnode *vp, 2206 struct label *vplabel) 2207{ 2208 struct mac_lomac *subj, *obj; 2209 2210 if (!lomac_enabled) 2211 return (0); 2212 2213 subj = SLOT(cred->cr_label); 2214 obj = SLOT(vplabel); 2215 2216 if (lomac_subject_privileged(subj)) 2217 return (EPERM); 2218 2219 if (!lomac_high_single(obj)) 2220 return (EACCES); 2221 2222 return (0); 2223} 2224 2225static int 2226lomac_system_check_auditctl(struct ucred *cred, struct vnode *vp, 2227 struct label *vplabel) 2228{ 2229 struct mac_lomac *subj, *obj; 2230 2231 if (!lomac_enabled) 2232 return (0); 2233 2234 subj = SLOT(cred->cr_label); 2235 obj = SLOT(vplabel); 2236 2237 if (lomac_subject_privileged(subj)) 2238 return (EPERM); 2239 2240 if (!lomac_high_single(obj)) 2241 return (EACCES); 2242 2243 return (0); 2244} 2245 2246static int 2247lomac_system_check_swapoff(struct ucred *cred, struct vnode *vp, 2248 struct label *vplabel) 2249{ 2250 struct mac_lomac *subj; 2251 2252 if (!lomac_enabled) 2253 return (0); 2254 2255 subj = SLOT(cred->cr_label); 2256 2257 if (lomac_subject_privileged(subj)) 2258 return (EPERM); 2259 2260 return (0); 2261} 2262 2263static int 2264lomac_system_check_swapon(struct ucred *cred, struct vnode *vp, 2265 struct label *vplabel) 2266{ 2267 struct mac_lomac *subj, *obj; 2268 2269 if (!lomac_enabled) 2270 return (0); 2271 2272 subj = SLOT(cred->cr_label); 2273 obj = SLOT(vplabel); 2274 2275 if (lomac_subject_privileged(subj)) 2276 return (EPERM); 2277 2278 if (!lomac_high_single(obj)) 2279 return (EACCES); 2280 2281 return (0); 2282} 2283 2284static int 2285lomac_system_check_sysctl(struct ucred *cred, struct sysctl_oid *oidp, 2286 void *arg1, int arg2, struct sysctl_req *req) 2287{ 2288 struct mac_lomac *subj; 2289 2290 if (!lomac_enabled) 2291 return (0); 2292 2293 subj = SLOT(cred->cr_label); 2294 2295 /* 2296 * Treat sysctl variables without CTLFLAG_ANYBODY flag as lomac/high, 2297 * but also require privilege to change them. 2298 */ 2299 if (req->newptr != NULL && (oidp->oid_kind & CTLFLAG_ANYBODY) == 0) { 2300#ifdef notdef 2301 if (!lomac_subject_dominate_high(subj)) 2302 return (EACCES); 2303#endif 2304 2305 if (lomac_subject_privileged(subj)) 2306 return (EPERM); 2307 } 2308 2309 return (0); 2310} 2311 2312static int 2313lomac_vnode_check_create(struct ucred *cred, struct vnode *dvp, 2314 struct label *dvplabel, struct componentname *cnp, struct vattr *vap) 2315{ 2316 struct mac_lomac *subj, *obj; 2317 2318 if (!lomac_enabled) 2319 return (0); 2320 2321 subj = SLOT(cred->cr_label); 2322 obj = SLOT(dvplabel); 2323 2324 if (!lomac_subject_dominate(subj, obj)) 2325 return (EACCES); 2326 if (obj->ml_flags & MAC_LOMAC_FLAG_AUX && 2327 !lomac_dominate_element(&subj->ml_single, &obj->ml_auxsingle)) 2328 return (EACCES); 2329 2330 return (0); 2331} 2332 2333static int 2334lomac_vnode_check_deleteacl(struct ucred *cred, struct vnode *vp, 2335 struct label *vplabel, acl_type_t type) 2336{ 2337 struct mac_lomac *subj, *obj; 2338 2339 if (!lomac_enabled) 2340 return (0); 2341 2342 subj = SLOT(cred->cr_label); 2343 obj = SLOT(vplabel); 2344 2345 if (!lomac_subject_dominate(subj, obj)) 2346 return (EACCES); 2347 2348 return (0); 2349} 2350 2351static int 2352lomac_vnode_check_link(struct ucred *cred, struct vnode *dvp, 2353 struct label *dvplabel, struct vnode *vp, struct label *vplabel, 2354 struct componentname *cnp) 2355{ 2356 struct mac_lomac *subj, *obj; 2357 2358 if (!lomac_enabled) 2359 return (0); 2360 2361 subj = SLOT(cred->cr_label); 2362 obj = SLOT(dvplabel); 2363 2364 if (!lomac_subject_dominate(subj, obj)) 2365 return (EACCES); 2366 2367 obj = SLOT(vplabel); 2368 2369 if (!lomac_subject_dominate(subj, obj)) 2370 return (EACCES); 2371 2372 return (0); 2373} 2374 2375static int 2376lomac_vnode_check_mmap(struct ucred *cred, struct vnode *vp, 2377 struct label *vplabel, int prot, int flags) 2378{ 2379 struct mac_lomac *subj, *obj; 2380 2381 /* 2382 * Rely on the use of open()-time protections to handle 2383 * non-revocation cases. 2384 */ 2385 if (!lomac_enabled) 2386 return (0); 2387 2388 subj = SLOT(cred->cr_label); 2389 obj = SLOT(vplabel); 2390 2391 if (((prot & VM_PROT_WRITE) != 0) && ((flags & MAP_SHARED) != 0)) { 2392 if (!lomac_subject_dominate(subj, obj)) 2393 return (EACCES); 2394 } 2395 if (prot & (VM_PROT_READ | VM_PROT_EXECUTE)) { 2396 if (!lomac_dominate_single(obj, subj)) 2397 return (maybe_demote(subj, obj, "mapping", "file", vp)); 2398 } 2399 2400 return (0); 2401} 2402 2403static void 2404lomac_vnode_check_mmap_downgrade(struct ucred *cred, struct vnode *vp, 2405 struct label *vplabel, /* XXX vm_prot_t */ int *prot) 2406{ 2407 struct mac_lomac *subj, *obj; 2408 2409 /* 2410 * Rely on the use of open()-time protections to handle 2411 * non-revocation cases. 2412 */ 2413 if (!lomac_enabled || !revocation_enabled) 2414 return; 2415 2416 subj = SLOT(cred->cr_label); 2417 obj = SLOT(vplabel); 2418 2419 if (!lomac_subject_dominate(subj, obj)) 2420 *prot &= ~VM_PROT_WRITE; 2421} 2422 2423static int 2424lomac_vnode_check_open(struct ucred *cred, struct vnode *vp, 2425 struct label *vplabel, int acc_mode) 2426{ 2427 struct mac_lomac *subj, *obj; 2428 2429 if (!lomac_enabled) 2430 return (0); 2431 2432 subj = SLOT(cred->cr_label); 2433 obj = SLOT(vplabel); 2434 2435 /* XXX privilege override for admin? */ 2436 if (acc_mode & (VWRITE | VAPPEND | VADMIN)) { 2437 if (!lomac_subject_dominate(subj, obj)) 2438 return (EACCES); 2439 } 2440 2441 return (0); 2442} 2443 2444static int 2445lomac_vnode_check_read(struct ucred *active_cred, struct ucred *file_cred, 2446 struct vnode *vp, struct label *vplabel) 2447{ 2448 struct mac_lomac *subj, *obj; 2449 2450 if (!lomac_enabled || !revocation_enabled) 2451 return (0); 2452 2453 subj = SLOT(active_cred->cr_label); 2454 obj = SLOT(vplabel); 2455 2456 if (!lomac_dominate_single(obj, subj)) 2457 return (maybe_demote(subj, obj, "reading", "file", vp)); 2458 2459 return (0); 2460} 2461 2462static int 2463lomac_vnode_check_relabel(struct ucred *cred, struct vnode *vp, 2464 struct label *vplabel, struct label *newlabel) 2465{ 2466 struct mac_lomac *old, *new, *subj; 2467 int error; 2468 2469 old = SLOT(vplabel); 2470 new = SLOT(newlabel); 2471 subj = SLOT(cred->cr_label); 2472 2473 /* 2474 * If there is a LOMAC label update for the vnode, it must be a 2475 * single label, with an optional explicit auxiliary single. 2476 */ 2477 error = lomac_atmostflags(new, 2478 MAC_LOMAC_FLAG_SINGLE | MAC_LOMAC_FLAG_AUX); 2479 if (error) 2480 return (error); 2481 2482 /* 2483 * To perform a relabel of the vnode (LOMAC label or not), LOMAC must 2484 * authorize the relabel. 2485 */ 2486 if (!lomac_single_in_range(old, subj)) 2487 return (EPERM); 2488 2489 /* 2490 * If the LOMAC label is to be changed, authorize as appropriate. 2491 */ 2492 if (new->ml_flags & MAC_LOMAC_FLAG_SINGLE) { 2493 /* 2494 * To change the LOMAC label on a vnode, the new vnode label 2495 * must be in the subject range. 2496 */ 2497 if (!lomac_single_in_range(new, subj)) 2498 return (EPERM); 2499 2500 /* 2501 * To change the LOMAC label on the vnode to be EQUAL, the 2502 * subject must have appropriate privilege. 2503 */ 2504 if (lomac_contains_equal(new)) { 2505 error = lomac_subject_privileged(subj); 2506 if (error) 2507 return (error); 2508 } 2509 } 2510 if (new->ml_flags & MAC_LOMAC_FLAG_AUX) { 2511 /* 2512 * Fill in the missing parts from the previous label. 2513 */ 2514 if ((new->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0) 2515 lomac_copy_single(subj, new); 2516 2517 /* 2518 * To change the auxiliary LOMAC label on a vnode, the new 2519 * vnode label must be in the subject range. 2520 */ 2521 if (!lomac_auxsingle_in_range(new, subj)) 2522 return (EPERM); 2523 2524 /* 2525 * To change the auxiliary LOMAC label on the vnode to be 2526 * EQUAL, the subject must have appropriate privilege. 2527 */ 2528 if (lomac_contains_equal(new)) { 2529 error = lomac_subject_privileged(subj); 2530 if (error) 2531 return (error); 2532 } 2533 } 2534 2535 return (0); 2536} 2537 2538static int 2539lomac_vnode_check_rename_from(struct ucred *cred, struct vnode *dvp, 2540 struct label *dvplabel, struct vnode *vp, struct label *vplabel, 2541 struct componentname *cnp) 2542{ 2543 struct mac_lomac *subj, *obj; 2544 2545 if (!lomac_enabled) 2546 return (0); 2547 2548 subj = SLOT(cred->cr_label); 2549 obj = SLOT(dvplabel); 2550 2551 if (!lomac_subject_dominate(subj, obj)) 2552 return (EACCES); 2553 2554 obj = SLOT(vplabel); 2555 2556 if (!lomac_subject_dominate(subj, obj)) 2557 return (EACCES); 2558 2559 return (0); 2560} 2561 2562static int 2563lomac_vnode_check_rename_to(struct ucred *cred, struct vnode *dvp, 2564 struct label *dvplabel, struct vnode *vp, struct label *vplabel, 2565 int samedir, struct componentname *cnp) 2566{ 2567 struct mac_lomac *subj, *obj; 2568 2569 if (!lomac_enabled) 2570 return (0); 2571 2572 subj = SLOT(cred->cr_label); 2573 obj = SLOT(dvplabel); 2574 2575 if (!lomac_subject_dominate(subj, obj)) 2576 return (EACCES); 2577 2578 if (vp != NULL) { 2579 obj = SLOT(vplabel); 2580 2581 if (!lomac_subject_dominate(subj, obj)) 2582 return (EACCES); 2583 } 2584 2585 return (0); 2586} 2587 2588static int 2589lomac_vnode_check_revoke(struct ucred *cred, struct vnode *vp, 2590 struct label *vplabel) 2591{ 2592 struct mac_lomac *subj, *obj; 2593 2594 if (!lomac_enabled) 2595 return (0); 2596 2597 subj = SLOT(cred->cr_label); 2598 obj = SLOT(vplabel); 2599 2600 if (!lomac_subject_dominate(subj, obj)) 2601 return (EACCES); 2602 2603 return (0); 2604} 2605 2606static int 2607lomac_vnode_check_setacl(struct ucred *cred, struct vnode *vp, 2608 struct label *vplabel, acl_type_t type, struct acl *acl) 2609{ 2610 struct mac_lomac *subj, *obj; 2611 2612 if (!lomac_enabled) 2613 return (0); 2614 2615 subj = SLOT(cred->cr_label); 2616 obj = SLOT(vplabel); 2617 2618 if (!lomac_subject_dominate(subj, obj)) 2619 return (EACCES); 2620 2621 return (0); 2622} 2623 2624static int 2625lomac_vnode_check_setextattr(struct ucred *cred, struct vnode *vp, 2626 struct label *vplabel, int attrnamespace, const char *name, 2627 struct uio *uio) 2628{ 2629 struct mac_lomac *subj, *obj; 2630 2631 if (!lomac_enabled) 2632 return (0); 2633 2634 subj = SLOT(cred->cr_label); 2635 obj = SLOT(vplabel); 2636 2637 if (!lomac_subject_dominate(subj, obj)) 2638 return (EACCES); 2639 2640 /* XXX: protect the MAC EA in a special way? */ 2641 2642 return (0); 2643} 2644 2645static int 2646lomac_vnode_check_setflags(struct ucred *cred, struct vnode *vp, 2647 struct label *vplabel, u_long flags) 2648{ 2649 struct mac_lomac *subj, *obj; 2650 2651 if (!lomac_enabled) 2652 return (0); 2653 2654 subj = SLOT(cred->cr_label); 2655 obj = SLOT(vplabel); 2656 2657 if (!lomac_subject_dominate(subj, obj)) 2658 return (EACCES); 2659 2660 return (0); 2661} 2662 2663static int 2664lomac_vnode_check_setmode(struct ucred *cred, struct vnode *vp, 2665 struct label *vplabel, mode_t mode) 2666{ 2667 struct mac_lomac *subj, *obj; 2668 2669 if (!lomac_enabled) 2670 return (0); 2671 2672 subj = SLOT(cred->cr_label); 2673 obj = SLOT(vplabel); 2674 2675 if (!lomac_subject_dominate(subj, obj)) 2676 return (EACCES); 2677 2678 return (0); 2679} 2680 2681static int 2682lomac_vnode_check_setowner(struct ucred *cred, struct vnode *vp, 2683 struct label *vplabel, uid_t uid, gid_t gid) 2684{ 2685 struct mac_lomac *subj, *obj; 2686 2687 if (!lomac_enabled) 2688 return (0); 2689 2690 subj = SLOT(cred->cr_label); 2691 obj = SLOT(vplabel); 2692 2693 if (!lomac_subject_dominate(subj, obj)) 2694 return (EACCES); 2695 2696 return (0); 2697} 2698 2699static int 2700lomac_vnode_check_setutimes(struct ucred *cred, struct vnode *vp, 2701 struct label *vplabel, struct timespec atime, struct timespec mtime) 2702{ 2703 struct mac_lomac *subj, *obj; 2704 2705 if (!lomac_enabled) 2706 return (0); 2707 2708 subj = SLOT(cred->cr_label); 2709 obj = SLOT(vplabel); 2710 2711 if (!lomac_subject_dominate(subj, obj)) 2712 return (EACCES); 2713 2714 return (0); 2715} 2716 2717static int 2718lomac_vnode_check_unlink(struct ucred *cred, struct vnode *dvp, 2719 struct label *dvplabel, struct vnode *vp, struct label *vplabel, 2720 struct componentname *cnp) 2721{ 2722 struct mac_lomac *subj, *obj; 2723 2724 if (!lomac_enabled) 2725 return (0); 2726 2727 subj = SLOT(cred->cr_label); 2728 obj = SLOT(dvplabel); 2729 2730 if (!lomac_subject_dominate(subj, obj)) 2731 return (EACCES); 2732 2733 obj = SLOT(vplabel); 2734 2735 if (!lomac_subject_dominate(subj, obj)) 2736 return (EACCES); 2737 2738 return (0); 2739} 2740 2741static int 2742lomac_vnode_check_write(struct ucred *active_cred, 2743 struct ucred *file_cred, struct vnode *vp, struct label *vplabel) 2744{ 2745 struct mac_lomac *subj, *obj; 2746 2747 if (!lomac_enabled || !revocation_enabled) 2748 return (0); 2749 2750 subj = SLOT(active_cred->cr_label); 2751 obj = SLOT(vplabel); 2752 2753 if (!lomac_subject_dominate(subj, obj)) 2754 return (EACCES); 2755 2756 return (0); 2757} 2758 2759static void 2760lomac_thread_userret(struct thread *td) 2761{ 2762 struct proc *p = td->td_proc; 2763 struct mac_lomac_proc *subj = PSLOT(p->p_label); 2764 struct ucred *newcred, *oldcred; 2765 int dodrop; 2766 2767 mtx_lock(&subj->mtx); 2768 if (subj->mac_lomac.ml_flags & MAC_LOMAC_FLAG_UPDATE) { 2769 dodrop = 0; 2770 mtx_unlock(&subj->mtx); 2771 newcred = crget(); 2772 /* 2773 * Prevent a lock order reversal in 2774 * mac_cred_mmapped_drop_perms; ideally, the other user of 2775 * subj->mtx wouldn't be holding Giant. 2776 */ 2777 mtx_lock(&Giant); 2778 PROC_LOCK(p); 2779 mtx_lock(&subj->mtx); 2780 /* 2781 * Check if we lost the race while allocating the cred. 2782 */ 2783 if ((subj->mac_lomac.ml_flags & MAC_LOMAC_FLAG_UPDATE) == 0) { 2784 crfree(newcred); 2785 goto out; 2786 } 2787 oldcred = p->p_ucred; 2788 crcopy(newcred, oldcred); 2789 crhold(newcred); 2790 lomac_copy(&subj->mac_lomac, SLOT(newcred->cr_label)); 2791 p->p_ucred = newcred; 2792 crfree(oldcred); 2793 dodrop = 1; 2794 out: 2795 mtx_unlock(&subj->mtx); 2796 PROC_UNLOCK(p); 2797 if (dodrop) 2798 mac_cred_mmapped_drop_perms(curthread, newcred); 2799 mtx_unlock(&Giant); 2800 } else { 2801 mtx_unlock(&subj->mtx); 2802 } 2803} 2804 2805static struct mac_policy_ops lomac_ops = 2806{ 2807 .mpo_init = lomac_init, 2808 .mpo_bpfdesc_init_label = lomac_init_label, 2809 .mpo_cred_init_label = lomac_init_label, 2810 .mpo_devfs_init_label = lomac_init_label, 2811 .mpo_ifnet_init_label = lomac_init_label, 2812 .mpo_init_syncache_label = lomac_init_label_waitcheck, 2813 .mpo_inpcb_init_label = lomac_init_label_waitcheck, 2814 .mpo_ipq_init_label = lomac_init_label_waitcheck, 2815 .mpo_mbuf_init_label = lomac_init_label_waitcheck, 2816 .mpo_mount_init_label = lomac_init_label, 2817 .mpo_pipe_init_label = lomac_init_label, 2818 .mpo_proc_init_label = lomac_proc_init_label, 2819 .mpo_socket_init_label = lomac_init_label_waitcheck, 2820 .mpo_socketpeer_init_label = lomac_init_label_waitcheck, 2821 .mpo_vnode_init_label = lomac_init_label, 2822 .mpo_init_syncache_from_inpcb = lomac_init_syncache_from_inpcb, 2823 .mpo_bpfdesc_destroy_label = lomac_destroy_label, 2824 .mpo_cred_destroy_label = lomac_destroy_label, 2825 .mpo_devfs_destroy_label = lomac_destroy_label, 2826 .mpo_ifnet_destroy_label = lomac_destroy_label, 2827 .mpo_inpcb_destroy_label = lomac_destroy_label, 2828 .mpo_ipq_destroy_label = lomac_destroy_label, 2829 .mpo_mbuf_destroy_label = lomac_destroy_label, 2830 .mpo_mount_destroy_label = lomac_destroy_label, 2831 .mpo_pipe_destroy_label = lomac_destroy_label, 2832 .mpo_proc_destroy_label = lomac_proc_destroy_label, 2833 .mpo_destroy_syncache_label = lomac_destroy_label, 2834 .mpo_socket_destroy_label = lomac_destroy_label, 2835 .mpo_socketpeer_destroy_label = lomac_destroy_label, 2836 .mpo_vnode_destroy_label = lomac_destroy_label, 2837 .mpo_cred_copy_label = lomac_copy_label, 2838 .mpo_ifnet_copy_label = lomac_copy_label, 2839 .mpo_mbuf_copy_label = lomac_copy_label, 2840 .mpo_pipe_copy_label = lomac_copy_label, 2841 .mpo_socket_copy_label = lomac_copy_label, 2842 .mpo_vnode_copy_label = lomac_copy_label, 2843 .mpo_cred_externalize_label = lomac_externalize_label, 2844 .mpo_ifnet_externalize_label = lomac_externalize_label, 2845 .mpo_pipe_externalize_label = lomac_externalize_label, 2846 .mpo_socket_externalize_label = lomac_externalize_label, 2847 .mpo_socketpeer_externalize_label = lomac_externalize_label, 2848 .mpo_vnode_externalize_label = lomac_externalize_label, 2849 .mpo_cred_internalize_label = lomac_internalize_label, 2850 .mpo_ifnet_internalize_label = lomac_internalize_label, 2851 .mpo_pipe_internalize_label = lomac_internalize_label, 2852 .mpo_socket_internalize_label = lomac_internalize_label, 2853 .mpo_vnode_internalize_label = lomac_internalize_label, 2854 .mpo_devfs_create_device = lomac_devfs_create_device, 2855 .mpo_devfs_create_directory = lomac_devfs_create_directory, 2856 .mpo_devfs_create_symlink = lomac_devfs_create_symlink, 2857 .mpo_mount_create = lomac_mount_create, 2858 .mpo_vnode_relabel = lomac_vnode_relabel, 2859 .mpo_devfs_update = lomac_devfs_update, 2860 .mpo_devfs_vnode_associate = lomac_devfs_vnode_associate, 2861 .mpo_vnode_associate_extattr = lomac_vnode_associate_extattr, 2862 .mpo_vnode_associate_singlelabel = lomac_vnode_associate_singlelabel, 2863 .mpo_vnode_create_extattr = lomac_vnode_create_extattr, 2864 .mpo_vnode_setlabel_extattr = lomac_vnode_setlabel_extattr, 2865 .mpo_socket_create_mbuf = lomac_socket_create_mbuf, 2866 .mpo_create_mbuf_from_syncache = lomac_create_mbuf_from_syncache, 2867 .mpo_pipe_create = lomac_pipe_create, 2868 .mpo_socket_create = lomac_socket_create, 2869 .mpo_socket_newconn = lomac_socket_newconn, 2870 .mpo_pipe_relabel = lomac_pipe_relabel, 2871 .mpo_socket_relabel = lomac_socket_relabel, 2872 .mpo_socketpeer_set_from_mbuf = lomac_socketpeer_set_from_mbuf, 2873 .mpo_socketpeer_set_from_socket = lomac_socketpeer_set_from_socket, 2874 .mpo_bpfdesc_create = lomac_bpfdesc_create, 2875 .mpo_ipq_reassemble = lomac_ipq_reassemble, 2876 .mpo_netinet_fragment = lomac_netinet_fragment, 2877 .mpo_ifnet_create = lomac_ifnet_create, 2878 .mpo_inpcb_create = lomac_inpcb_create, 2879 .mpo_ipq_create = lomac_ipq_create, 2880 .mpo_inpcb_create_mbuf = lomac_inpcb_create_mbuf, 2881 .mpo_create_mbuf_linklayer = lomac_create_mbuf_linklayer, 2882 .mpo_bpfdesc_create_mbuf = lomac_bpfdesc_create_mbuf, 2883 .mpo_ifnet_create_mbuf = lomac_ifnet_create_mbuf, 2884 .mpo_mbuf_create_multicast_encap = lomac_mbuf_create_multicast_encap, 2885 .mpo_mbuf_create_netlayer = lomac_mbuf_create_netlayer, 2886 .mpo_ipq_match = lomac_ipq_match, 2887 .mpo_ifnet_relabel = lomac_ifnet_relabel, 2888 .mpo_ipq_update = lomac_ipq_update, 2889 .mpo_inpcb_sosetlabel = lomac_inpcb_sosetlabel, 2890 .mpo_vnode_execve_transition = lomac_vnode_execve_transition, 2891 .mpo_vnode_execve_will_transition = 2892 lomac_vnode_execve_will_transition, 2893 .mpo_proc_create_swapper = lomac_proc_create_swapper, 2894 .mpo_proc_create_init = lomac_proc_create_init, 2895 .mpo_cred_relabel = lomac_cred_relabel, 2896 .mpo_bpfdesc_check_receive = lomac_bpfdesc_check_receive, 2897 .mpo_cred_check_relabel = lomac_cred_check_relabel, 2898 .mpo_cred_check_visible = lomac_cred_check_visible, 2899 .mpo_ifnet_check_relabel = lomac_ifnet_check_relabel, 2900 .mpo_ifnet_check_transmit = lomac_ifnet_check_transmit, 2901 .mpo_inpcb_check_deliver = lomac_inpcb_check_deliver, 2902 .mpo_kld_check_load = lomac_kld_check_load, 2903 .mpo_pipe_check_ioctl = lomac_pipe_check_ioctl, 2904 .mpo_pipe_check_read = lomac_pipe_check_read, 2905 .mpo_pipe_check_relabel = lomac_pipe_check_relabel, 2906 .mpo_pipe_check_write = lomac_pipe_check_write, 2907 .mpo_proc_check_debug = lomac_proc_check_debug, 2908 .mpo_proc_check_sched = lomac_proc_check_sched, 2909 .mpo_proc_check_signal = lomac_proc_check_signal, 2910 .mpo_socket_check_deliver = lomac_socket_check_deliver, 2911 .mpo_socket_check_relabel = lomac_socket_check_relabel, 2912 .mpo_socket_check_visible = lomac_socket_check_visible, 2913 .mpo_system_check_acct = lomac_system_check_acct, 2914 .mpo_system_check_auditctl = lomac_system_check_auditctl, 2915 .mpo_system_check_swapoff = lomac_system_check_swapoff, 2916 .mpo_system_check_swapon = lomac_system_check_swapon, 2917 .mpo_system_check_sysctl = lomac_system_check_sysctl, 2918 .mpo_vnode_check_access = lomac_vnode_check_open, 2919 .mpo_vnode_check_create = lomac_vnode_check_create, 2920 .mpo_vnode_check_deleteacl = lomac_vnode_check_deleteacl, 2921 .mpo_vnode_check_link = lomac_vnode_check_link, 2922 .mpo_vnode_check_mmap = lomac_vnode_check_mmap, 2923 .mpo_vnode_check_mmap_downgrade = lomac_vnode_check_mmap_downgrade, 2924 .mpo_vnode_check_open = lomac_vnode_check_open, 2925 .mpo_vnode_check_read = lomac_vnode_check_read, 2926 .mpo_vnode_check_relabel = lomac_vnode_check_relabel, 2927 .mpo_vnode_check_rename_from = lomac_vnode_check_rename_from, 2928 .mpo_vnode_check_rename_to = lomac_vnode_check_rename_to, 2929 .mpo_vnode_check_revoke = lomac_vnode_check_revoke, 2930 .mpo_vnode_check_setacl = lomac_vnode_check_setacl, 2931 .mpo_vnode_check_setextattr = lomac_vnode_check_setextattr, 2932 .mpo_vnode_check_setflags = lomac_vnode_check_setflags, 2933 .mpo_vnode_check_setmode = lomac_vnode_check_setmode, 2934 .mpo_vnode_check_setowner = lomac_vnode_check_setowner, 2935 .mpo_vnode_check_setutimes = lomac_vnode_check_setutimes, 2936 .mpo_vnode_check_unlink = lomac_vnode_check_unlink, 2937 .mpo_vnode_check_write = lomac_vnode_check_write, 2938 .mpo_thread_userret = lomac_thread_userret, 2939 .mpo_mbuf_create_from_firewall = lomac_mbuf_create_from_firewall, 2940 .mpo_priv_check = lomac_priv_check, 2941}; 2942 2943MAC_POLICY_SET(&lomac_ops, mac_lomac, "TrustedBSD MAC/LOMAC", 2944 MPC_LOADTIME_FLAG_NOTLATE | MPC_LOADTIME_FLAG_LABELMBUFS, 2945 &lomac_slot); 2946