mac_lomac.c revision 173095
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 173095 2007-10-28 15:55:23Z 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_bpfdesc_create_mbuf(struct bpf_d *d, struct label *dlabel, 1336 struct mbuf *m, struct label *mlabel) 1337{ 1338 struct mac_lomac *source, *dest; 1339 1340 source = SLOT(dlabel); 1341 dest = SLOT(mlabel); 1342 1343 lomac_copy_single(source, dest); 1344} 1345 1346static void 1347lomac_ifnet_create_mbuf(struct ifnet *ifp, struct label *ifplabel, 1348 struct mbuf *m, struct label *mlabel) 1349{ 1350 struct mac_lomac *source, *dest; 1351 1352 source = SLOT(ifplabel); 1353 dest = SLOT(mlabel); 1354 1355 lomac_copy_single(source, dest); 1356} 1357 1358static void 1359lomac_mbuf_create_multicast_encap(struct mbuf *m, struct label *mlabel, 1360 struct ifnet *ifp, struct label *ifplabel, struct mbuf *mnew, 1361 struct label *mnewlabel) 1362{ 1363 struct mac_lomac *source, *dest; 1364 1365 source = SLOT(mlabel); 1366 dest = SLOT(mnewlabel); 1367 1368 lomac_copy_single(source, dest); 1369} 1370 1371static void 1372lomac_mbuf_create_netlayer(struct mbuf *m, struct label *mlabel, 1373 struct mbuf *mnew, struct label *mnewlabel) 1374{ 1375 struct mac_lomac *source, *dest; 1376 1377 source = SLOT(mlabel); 1378 dest = SLOT(mnewlabel); 1379 1380 lomac_copy_single(source, dest); 1381} 1382 1383static int 1384lomac_ipq_match(struct mbuf *m, struct label *mlabel, struct ipq *ipq, 1385 struct label *ipqlabel) 1386{ 1387 struct mac_lomac *a, *b; 1388 1389 a = SLOT(ipqlabel); 1390 b = SLOT(mlabel); 1391 1392 return (lomac_equal_single(a, b)); 1393} 1394 1395static void 1396lomac_ifnet_relabel(struct ucred *cred, struct ifnet *ifp, 1397 struct label *ifplabel, struct label *newlabel) 1398{ 1399 struct mac_lomac *source, *dest; 1400 1401 source = SLOT(newlabel); 1402 dest = SLOT(ifplabel); 1403 1404 try_relabel(source, dest); 1405} 1406 1407static void 1408lomac_ipq_update(struct mbuf *m, struct label *mlabel, struct ipq *ipq, 1409 struct label *ipqlabel) 1410{ 1411 1412 /* NOOP: we only accept matching labels, so no need to update */ 1413} 1414 1415static void 1416lomac_inpcb_sosetlabel(struct socket *so, struct label *solabel, 1417 struct inpcb *inp, struct label *inplabel) 1418{ 1419 struct mac_lomac *source, *dest; 1420 1421 source = SLOT(solabel); 1422 dest = SLOT(inplabel); 1423 1424 lomac_copy_single(source, dest); 1425} 1426 1427static void 1428lomac_syncache_create(struct label *label, struct inpcb *inp) 1429{ 1430 struct mac_lomac *source, *dest; 1431 1432 source = SLOT(inp->inp_label); 1433 dest = SLOT(label); 1434 lomac_copy(source, dest); 1435} 1436 1437static void 1438lomac_syncache_create_mbuf(struct label *sc_label, struct mbuf *m, 1439 struct label *mlabel) 1440{ 1441 struct mac_lomac *source, *dest; 1442 1443 source = SLOT(sc_label); 1444 dest = SLOT(mlabel); 1445 lomac_copy(source, dest); 1446} 1447 1448static void 1449lomac_netatalk_aarp_send(struct ifnet *ifp, struct label *ifplabel, 1450 struct mbuf *m, struct label *mlabel) 1451{ 1452 struct mac_lomac *dest; 1453 1454 dest = SLOT(mlabel); 1455 1456 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0); 1457} 1458 1459static void 1460lomac_netinet_arp_send(struct ifnet *ifp, struct label *ifplabel, 1461 struct mbuf *m, struct label *mlabel) 1462{ 1463 struct mac_lomac *dest; 1464 1465 dest = SLOT(mlabel); 1466 1467 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0); 1468} 1469 1470static void 1471lomac_netinet_firewall_send(struct mbuf *m, struct label *mlabel) 1472{ 1473 struct mac_lomac *dest; 1474 1475 dest = SLOT(mlabel); 1476 1477 /* XXX: where is the label for the firewall really comming from? */ 1478 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0); 1479} 1480 1481static void 1482lomac_netinet_igmp_send(struct ifnet *ifp, struct label *ifplabel, 1483 struct mbuf *m, struct label *mlabel) 1484{ 1485 struct mac_lomac *dest; 1486 1487 dest = SLOT(mlabel); 1488 1489 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0); 1490} 1491 1492static void 1493lomac_netinet6_nd6_send(struct ifnet *ifp, struct label *ifplabel, 1494 struct mbuf *m, struct label *mlabel) 1495{ 1496 struct mac_lomac *dest; 1497 1498 dest = SLOT(mlabel); 1499 1500 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0); 1501} 1502 1503/* 1504 * Labeling event operations: processes. 1505 */ 1506static void 1507lomac_vnode_execve_transition(struct ucred *old, struct ucred *new, 1508 struct vnode *vp, struct label *vplabel, struct label *interpvplabel, 1509 struct image_params *imgp, struct label *execlabel) 1510{ 1511 struct mac_lomac *source, *dest, *obj, *robj; 1512 1513 source = SLOT(old->cr_label); 1514 dest = SLOT(new->cr_label); 1515 obj = SLOT(vplabel); 1516 robj = interpvplabel != NULL ? SLOT(interpvplabel) : obj; 1517 1518 lomac_copy(source, dest); 1519 /* 1520 * If there's an auxiliary label on the real object, respect it and 1521 * assume that this level should be assumed immediately if a higher 1522 * level is currently in place. 1523 */ 1524 if (robj->ml_flags & MAC_LOMAC_FLAG_AUX && 1525 !lomac_dominate_element(&robj->ml_auxsingle, &dest->ml_single) 1526 && lomac_auxsingle_in_range(robj, dest)) 1527 lomac_set_single(dest, robj->ml_auxsingle.mle_type, 1528 robj->ml_auxsingle.mle_grade); 1529 /* 1530 * Restructuring to use the execve transitioning mechanism instead of 1531 * the normal demotion mechanism here would be difficult, so just 1532 * copy the label over and perform standard demotion. This is also 1533 * non-optimal because it will result in the intermediate label "new" 1534 * being created and immediately recycled. 1535 */ 1536 if (lomac_enabled && revocation_enabled && 1537 !lomac_dominate_single(obj, source)) 1538 (void)maybe_demote(source, obj, "executing", "file", vp); 1539} 1540 1541static int 1542lomac_vnode_execve_will_transition(struct ucred *old, struct vnode *vp, 1543 struct label *vplabel, struct label *interpvplabel, 1544 struct image_params *imgp, struct label *execlabel) 1545{ 1546 struct mac_lomac *subj, *obj, *robj; 1547 1548 if (!lomac_enabled || !revocation_enabled) 1549 return (0); 1550 1551 subj = SLOT(old->cr_label); 1552 obj = SLOT(vplabel); 1553 robj = interpvplabel != NULL ? SLOT(interpvplabel) : obj; 1554 1555 return ((robj->ml_flags & MAC_LOMAC_FLAG_AUX && 1556 !lomac_dominate_element(&robj->ml_auxsingle, &subj->ml_single) 1557 && lomac_auxsingle_in_range(robj, subj)) || 1558 !lomac_dominate_single(obj, subj)); 1559} 1560 1561static void 1562lomac_proc_create_swapper(struct ucred *cred) 1563{ 1564 struct mac_lomac *dest; 1565 1566 dest = SLOT(cred->cr_label); 1567 1568 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0); 1569 lomac_set_range(dest, MAC_LOMAC_TYPE_LOW, 0, MAC_LOMAC_TYPE_HIGH, 0); 1570} 1571 1572static void 1573lomac_proc_create_init(struct ucred *cred) 1574{ 1575 struct mac_lomac *dest; 1576 1577 dest = SLOT(cred->cr_label); 1578 1579 lomac_set_single(dest, MAC_LOMAC_TYPE_HIGH, 0); 1580 lomac_set_range(dest, MAC_LOMAC_TYPE_LOW, 0, MAC_LOMAC_TYPE_HIGH, 0); 1581} 1582 1583static void 1584lomac_cred_relabel(struct ucred *cred, struct label *newlabel) 1585{ 1586 struct mac_lomac *source, *dest; 1587 1588 source = SLOT(newlabel); 1589 dest = SLOT(cred->cr_label); 1590 1591 try_relabel(source, dest); 1592} 1593 1594/* 1595 * Access control checks. 1596 */ 1597static int 1598lomac_bpfdesc_check_receive(struct bpf_d *d, struct label *dlabel, 1599 struct ifnet *ifp, struct label *ifplabel) 1600{ 1601 struct mac_lomac *a, *b; 1602 1603 if (!lomac_enabled) 1604 return (0); 1605 1606 a = SLOT(dlabel); 1607 b = SLOT(ifplabel); 1608 1609 if (lomac_equal_single(a, b)) 1610 return (0); 1611 return (EACCES); 1612} 1613 1614static int 1615lomac_cred_check_relabel(struct ucred *cred, struct label *newlabel) 1616{ 1617 struct mac_lomac *subj, *new; 1618 int error; 1619 1620 subj = SLOT(cred->cr_label); 1621 new = SLOT(newlabel); 1622 1623 /* 1624 * If there is a LOMAC label update for the credential, it may be an 1625 * update of the single, range, or both. 1626 */ 1627 error = lomac_atmostflags(new, MAC_LOMAC_FLAGS_BOTH); 1628 if (error) 1629 return (error); 1630 1631 /* 1632 * If the LOMAC label is to be changed, authorize as appropriate. 1633 */ 1634 if (new->ml_flags & MAC_LOMAC_FLAGS_BOTH) { 1635 /* 1636 * Fill in the missing parts from the previous label. 1637 */ 1638 if ((new->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0) 1639 lomac_copy_single(subj, new); 1640 if ((new->ml_flags & MAC_LOMAC_FLAG_RANGE) == 0) 1641 lomac_copy_range(subj, new); 1642 1643 /* 1644 * To change the LOMAC range on a credential, the new range 1645 * label must be in the current range. 1646 */ 1647 if (!lomac_range_in_range(new, subj)) 1648 return (EPERM); 1649 1650 /* 1651 * To change the LOMAC single label on a credential, the new 1652 * single label must be in the new range. Implicitly from 1653 * the previous check, the new single is in the old range. 1654 */ 1655 if (!lomac_single_in_range(new, new)) 1656 return (EPERM); 1657 1658 /* 1659 * To have EQUAL in any component of the new credential LOMAC 1660 * label, the subject must already have EQUAL in their label. 1661 */ 1662 if (lomac_contains_equal(new)) { 1663 error = lomac_subject_privileged(subj); 1664 if (error) 1665 return (error); 1666 } 1667 1668 /* 1669 * XXXMAC: Additional consistency tests regarding the single 1670 * and range of the new label might be performed here. 1671 */ 1672 } 1673 1674 return (0); 1675} 1676 1677static int 1678lomac_cred_check_visible(struct ucred *cr1, struct ucred *cr2) 1679{ 1680 struct mac_lomac *subj, *obj; 1681 1682 if (!lomac_enabled) 1683 return (0); 1684 1685 subj = SLOT(cr1->cr_label); 1686 obj = SLOT(cr2->cr_label); 1687 1688 /* XXX: range */ 1689 if (!lomac_dominate_single(obj, subj)) 1690 return (ESRCH); 1691 1692 return (0); 1693} 1694 1695static int 1696lomac_ifnet_check_relabel(struct ucred *cred, struct ifnet *ifp, 1697 struct label *ifplabel, struct label *newlabel) 1698{ 1699 struct mac_lomac *subj, *new; 1700 int error; 1701 1702 subj = SLOT(cred->cr_label); 1703 new = SLOT(newlabel); 1704 1705 /* 1706 * If there is a LOMAC label update for the interface, it may be an 1707 * update of the single, range, or both. 1708 */ 1709 error = lomac_atmostflags(new, MAC_LOMAC_FLAGS_BOTH); 1710 if (error) 1711 return (error); 1712 1713 /* 1714 * Relabling network interfaces requires LOMAC privilege. 1715 */ 1716 error = lomac_subject_privileged(subj); 1717 if (error) 1718 return (error); 1719 1720 /* 1721 * If the LOMAC label is to be changed, authorize as appropriate. 1722 */ 1723 if (new->ml_flags & MAC_LOMAC_FLAGS_BOTH) { 1724 /* 1725 * Fill in the missing parts from the previous label. 1726 */ 1727 if ((new->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0) 1728 lomac_copy_single(subj, new); 1729 if ((new->ml_flags & MAC_LOMAC_FLAG_RANGE) == 0) 1730 lomac_copy_range(subj, new); 1731 1732 /* 1733 * Rely on the traditional superuser status for the LOMAC 1734 * interface relabel requirements. XXXMAC: This will go 1735 * away. 1736 * 1737 * XXXRW: This is also redundant to a higher layer check. 1738 */ 1739 error = priv_check_cred(cred, PRIV_NET_SETIFMAC, 0); 1740 if (error) 1741 return (EPERM); 1742 1743 /* 1744 * XXXMAC: Additional consistency tests regarding the single 1745 * and the range of the new label might be performed here. 1746 */ 1747 } 1748 1749 return (0); 1750} 1751 1752static int 1753lomac_ifnet_check_transmit(struct ifnet *ifp, struct label *ifplabel, 1754 struct mbuf *m, struct label *mlabel) 1755{ 1756 struct mac_lomac *p, *i; 1757 1758 if (!lomac_enabled) 1759 return (0); 1760 1761 p = SLOT(mlabel); 1762 i = SLOT(ifplabel); 1763 1764 return (lomac_single_in_range(p, i) ? 0 : EACCES); 1765} 1766 1767static int 1768lomac_inpcb_check_deliver(struct inpcb *inp, struct label *inplabel, 1769 struct mbuf *m, struct label *mlabel) 1770{ 1771 struct mac_lomac *p, *i; 1772 1773 if (!lomac_enabled) 1774 return (0); 1775 1776 p = SLOT(mlabel); 1777 i = SLOT(inplabel); 1778 1779 return (lomac_equal_single(p, i) ? 0 : EACCES); 1780} 1781 1782static int 1783lomac_kld_check_load(struct ucred *cred, struct vnode *vp, 1784 struct label *vplabel) 1785{ 1786 struct mac_lomac *subj, *obj; 1787 1788 if (!lomac_enabled) 1789 return (0); 1790 1791 subj = SLOT(cred->cr_label); 1792 obj = SLOT(vplabel); 1793 1794 if (lomac_subject_privileged(subj)) 1795 return (EPERM); 1796 1797 if (!lomac_high_single(obj)) 1798 return (EACCES); 1799 1800 return (0); 1801} 1802 1803static int 1804lomac_pipe_check_ioctl(struct ucred *cred, struct pipepair *pp, 1805 struct label *pplabel, unsigned long cmd, void /* caddr_t */ *data) 1806{ 1807 1808 if (!lomac_enabled) 1809 return (0); 1810 1811 /* XXX: This will be implemented soon... */ 1812 1813 return (0); 1814} 1815 1816static int 1817lomac_pipe_check_read(struct ucred *cred, struct pipepair *pp, 1818 struct label *pplabel) 1819{ 1820 struct mac_lomac *subj, *obj; 1821 1822 if (!lomac_enabled) 1823 return (0); 1824 1825 subj = SLOT(cred->cr_label); 1826 obj = SLOT(pplabel); 1827 1828 if (!lomac_dominate_single(obj, subj)) 1829 return (maybe_demote(subj, obj, "reading", "pipe", NULL)); 1830 1831 return (0); 1832} 1833 1834static int 1835lomac_pipe_check_relabel(struct ucred *cred, struct pipepair *pp, 1836 struct label *pplabel, struct label *newlabel) 1837{ 1838 struct mac_lomac *subj, *obj, *new; 1839 int error; 1840 1841 new = SLOT(newlabel); 1842 subj = SLOT(cred->cr_label); 1843 obj = SLOT(pplabel); 1844 1845 /* 1846 * If there is a LOMAC label update for a pipe, it must be a single 1847 * update. 1848 */ 1849 error = lomac_atmostflags(new, MAC_LOMAC_FLAG_SINGLE); 1850 if (error) 1851 return (error); 1852 1853 /* 1854 * To perform a relabel of a pipe (LOMAC label or not), LOMAC must 1855 * authorize the relabel. 1856 */ 1857 if (!lomac_single_in_range(obj, subj)) 1858 return (EPERM); 1859 1860 /* 1861 * If the LOMAC label is to be changed, authorize as appropriate. 1862 */ 1863 if (new->ml_flags & MAC_LOMAC_FLAG_SINGLE) { 1864 /* 1865 * To change the LOMAC label on a pipe, the new pipe label 1866 * must be in the subject range. 1867 */ 1868 if (!lomac_single_in_range(new, subj)) 1869 return (EPERM); 1870 1871 /* 1872 * To change the LOMAC label on a pipe to be EQUAL, the 1873 * subject must have appropriate privilege. 1874 */ 1875 if (lomac_contains_equal(new)) { 1876 error = lomac_subject_privileged(subj); 1877 if (error) 1878 return (error); 1879 } 1880 } 1881 1882 return (0); 1883} 1884 1885static int 1886lomac_pipe_check_write(struct ucred *cred, struct pipepair *pp, 1887 struct label *pplabel) 1888{ 1889 struct mac_lomac *subj, *obj; 1890 1891 if (!lomac_enabled) 1892 return (0); 1893 1894 subj = SLOT(cred->cr_label); 1895 obj = SLOT(pplabel); 1896 1897 if (!lomac_subject_dominate(subj, obj)) 1898 return (EACCES); 1899 1900 return (0); 1901} 1902 1903static int 1904lomac_proc_check_debug(struct ucred *cred, struct proc *p) 1905{ 1906 struct mac_lomac *subj, *obj; 1907 1908 if (!lomac_enabled) 1909 return (0); 1910 1911 subj = SLOT(cred->cr_label); 1912 obj = SLOT(p->p_ucred->cr_label); 1913 1914 /* XXX: range checks */ 1915 if (!lomac_dominate_single(obj, subj)) 1916 return (ESRCH); 1917 if (!lomac_subject_dominate(subj, obj)) 1918 return (EACCES); 1919 1920 return (0); 1921} 1922 1923static int 1924lomac_proc_check_sched(struct ucred *cred, struct proc *p) 1925{ 1926 struct mac_lomac *subj, *obj; 1927 1928 if (!lomac_enabled) 1929 return (0); 1930 1931 subj = SLOT(cred->cr_label); 1932 obj = SLOT(p->p_ucred->cr_label); 1933 1934 /* XXX: range checks */ 1935 if (!lomac_dominate_single(obj, subj)) 1936 return (ESRCH); 1937 if (!lomac_subject_dominate(subj, obj)) 1938 return (EACCES); 1939 1940 return (0); 1941} 1942 1943static int 1944lomac_proc_check_signal(struct ucred *cred, struct proc *p, int signum) 1945{ 1946 struct mac_lomac *subj, *obj; 1947 1948 if (!lomac_enabled) 1949 return (0); 1950 1951 subj = SLOT(cred->cr_label); 1952 obj = SLOT(p->p_ucred->cr_label); 1953 1954 /* XXX: range checks */ 1955 if (!lomac_dominate_single(obj, subj)) 1956 return (ESRCH); 1957 if (!lomac_subject_dominate(subj, obj)) 1958 return (EACCES); 1959 1960 return (0); 1961} 1962 1963static int 1964lomac_socket_check_deliver(struct socket *so, struct label *solabel, 1965 struct mbuf *m, struct label *mlabel) 1966{ 1967 struct mac_lomac *p, *s; 1968 1969 if (!lomac_enabled) 1970 return (0); 1971 1972 p = SLOT(mlabel); 1973 s = SLOT(solabel); 1974 1975 return (lomac_equal_single(p, s) ? 0 : EACCES); 1976} 1977 1978static int 1979lomac_socket_check_relabel(struct ucred *cred, struct socket *so, 1980 struct label *solabel, struct label *newlabel) 1981{ 1982 struct mac_lomac *subj, *obj, *new; 1983 int error; 1984 1985 new = SLOT(newlabel); 1986 subj = SLOT(cred->cr_label); 1987 obj = SLOT(solabel); 1988 1989 /* 1990 * If there is a LOMAC label update for the socket, it may be an 1991 * update of single. 1992 */ 1993 error = lomac_atmostflags(new, MAC_LOMAC_FLAG_SINGLE); 1994 if (error) 1995 return (error); 1996 1997 /* 1998 * To relabel a socket, the old socket single must be in the subject 1999 * range. 2000 */ 2001 if (!lomac_single_in_range(obj, subj)) 2002 return (EPERM); 2003 2004 /* 2005 * If the LOMAC label is to be changed, authorize as appropriate. 2006 */ 2007 if (new->ml_flags & MAC_LOMAC_FLAG_SINGLE) { 2008 /* 2009 * To relabel a socket, the new socket single must be in the 2010 * subject range. 2011 */ 2012 if (!lomac_single_in_range(new, subj)) 2013 return (EPERM); 2014 2015 /* 2016 * To change the LOMAC label on the socket to contain EQUAL, 2017 * the subject must have appropriate privilege. 2018 */ 2019 if (lomac_contains_equal(new)) { 2020 error = lomac_subject_privileged(subj); 2021 if (error) 2022 return (error); 2023 } 2024 } 2025 2026 return (0); 2027} 2028 2029static int 2030lomac_socket_check_visible(struct ucred *cred, struct socket *so, 2031 struct label *solabel) 2032{ 2033 struct mac_lomac *subj, *obj; 2034 2035 if (!lomac_enabled) 2036 return (0); 2037 2038 subj = SLOT(cred->cr_label); 2039 obj = SLOT(solabel); 2040 2041 if (!lomac_dominate_single(obj, subj)) 2042 return (ENOENT); 2043 2044 return (0); 2045} 2046 2047/* 2048 * Some system privileges are allowed regardless of integrity grade; others 2049 * are allowed only when running with privilege with respect to the LOMAC 2050 * policy as they might otherwise allow bypassing of the integrity policy. 2051 */ 2052static int 2053lomac_priv_check(struct ucred *cred, int priv) 2054{ 2055 struct mac_lomac *subj; 2056 int error; 2057 2058 if (!lomac_enabled) 2059 return (0); 2060 2061 /* 2062 * Exempt only specific privileges from the LOMAC integrity policy. 2063 */ 2064 switch (priv) { 2065 case PRIV_KTRACE: 2066 case PRIV_MSGBUF: 2067 2068 /* 2069 * Allow processes to manipulate basic process audit properties, and 2070 * to submit audit records. 2071 */ 2072 case PRIV_AUDIT_GETAUDIT: 2073 case PRIV_AUDIT_SETAUDIT: 2074 case PRIV_AUDIT_SUBMIT: 2075 2076 /* 2077 * Allow processes to manipulate their regular UNIX credentials. 2078 */ 2079 case PRIV_CRED_SETUID: 2080 case PRIV_CRED_SETEUID: 2081 case PRIV_CRED_SETGID: 2082 case PRIV_CRED_SETEGID: 2083 case PRIV_CRED_SETGROUPS: 2084 case PRIV_CRED_SETREUID: 2085 case PRIV_CRED_SETREGID: 2086 case PRIV_CRED_SETRESUID: 2087 case PRIV_CRED_SETRESGID: 2088 2089 /* 2090 * Allow processes to perform system monitoring. 2091 */ 2092 case PRIV_SEEOTHERGIDS: 2093 case PRIV_SEEOTHERUIDS: 2094 break; 2095 2096 /* 2097 * Allow access to general process debugging facilities. We 2098 * separately control debugging based on MAC label. 2099 */ 2100 case PRIV_DEBUG_DIFFCRED: 2101 case PRIV_DEBUG_SUGID: 2102 case PRIV_DEBUG_UNPRIV: 2103 2104 /* 2105 * Allow manipulating jails. 2106 */ 2107 case PRIV_JAIL_ATTACH: 2108 2109 /* 2110 * Allow privilege with respect to the Partition policy, but not the 2111 * Privs policy. 2112 */ 2113 case PRIV_MAC_PARTITION: 2114 2115 /* 2116 * Allow privilege with respect to process resource limits and login 2117 * context. 2118 */ 2119 case PRIV_PROC_LIMIT: 2120 case PRIV_PROC_SETLOGIN: 2121 case PRIV_PROC_SETRLIMIT: 2122 2123 /* 2124 * Allow System V and POSIX IPC privileges. 2125 */ 2126 case PRIV_IPC_READ: 2127 case PRIV_IPC_WRITE: 2128 case PRIV_IPC_ADMIN: 2129 case PRIV_IPC_MSGSIZE: 2130 case PRIV_MQ_ADMIN: 2131 2132 /* 2133 * Allow certain scheduler manipulations -- possibly this should be 2134 * controlled by more fine-grained policy, as potentially low 2135 * integrity processes can deny CPU to higher integrity ones. 2136 */ 2137 case PRIV_SCHED_DIFFCRED: 2138 case PRIV_SCHED_SETPRIORITY: 2139 case PRIV_SCHED_RTPRIO: 2140 case PRIV_SCHED_SETPOLICY: 2141 case PRIV_SCHED_SET: 2142 case PRIV_SCHED_SETPARAM: 2143 2144 /* 2145 * More IPC privileges. 2146 */ 2147 case PRIV_SEM_WRITE: 2148 2149 /* 2150 * Allow signaling privileges subject to integrity policy. 2151 */ 2152 case PRIV_SIGNAL_DIFFCRED: 2153 case PRIV_SIGNAL_SUGID: 2154 2155 /* 2156 * Allow access to only limited sysctls from lower integrity levels; 2157 * piggy-back on the Jail definition. 2158 */ 2159 case PRIV_SYSCTL_WRITEJAIL: 2160 2161 /* 2162 * Allow TTY-based privileges, subject to general device access using 2163 * labels on TTY device nodes, but not console privilege. 2164 */ 2165 case PRIV_TTY_DRAINWAIT: 2166 case PRIV_TTY_DTRWAIT: 2167 case PRIV_TTY_EXCLUSIVE: 2168 case PRIV_TTY_PRISON: 2169 case PRIV_TTY_STI: 2170 case PRIV_TTY_SETA: 2171 2172 /* 2173 * Grant most VFS privileges, as almost all are in practice bounded 2174 * by more specific checks using labels. 2175 */ 2176 case PRIV_VFS_READ: 2177 case PRIV_VFS_WRITE: 2178 case PRIV_VFS_ADMIN: 2179 case PRIV_VFS_EXEC: 2180 case PRIV_VFS_LOOKUP: 2181 case PRIV_VFS_CHFLAGS_DEV: 2182 case PRIV_VFS_CHOWN: 2183 case PRIV_VFS_CHROOT: 2184 case PRIV_VFS_RETAINSUGID: 2185 case PRIV_VFS_EXCEEDQUOTA: 2186 case PRIV_VFS_FCHROOT: 2187 case PRIV_VFS_FHOPEN: 2188 case PRIV_VFS_FHSTATFS: 2189 case PRIV_VFS_GENERATION: 2190 case PRIV_VFS_GETFH: 2191 case PRIV_VFS_GETQUOTA: 2192 case PRIV_VFS_LINK: 2193 case PRIV_VFS_MOUNT: 2194 case PRIV_VFS_MOUNT_OWNER: 2195 case PRIV_VFS_MOUNT_PERM: 2196 case PRIV_VFS_MOUNT_SUIDDIR: 2197 case PRIV_VFS_MOUNT_NONUSER: 2198 case PRIV_VFS_SETGID: 2199 case PRIV_VFS_STICKYFILE: 2200 case PRIV_VFS_SYSFLAGS: 2201 case PRIV_VFS_UNMOUNT: 2202 2203 /* 2204 * Allow VM privileges; it would be nice if these were subject to 2205 * resource limits. 2206 */ 2207 case PRIV_VM_MADV_PROTECT: 2208 case PRIV_VM_MLOCK: 2209 case PRIV_VM_MUNLOCK: 2210 2211 /* 2212 * Allow some but not all network privileges. In general, dont allow 2213 * reconfiguring the network stack, just normal use. 2214 */ 2215 case PRIV_NETATALK_RESERVEDPORT: 2216 case PRIV_NETINET_RESERVEDPORT: 2217 case PRIV_NETINET_RAW: 2218 case PRIV_NETINET_REUSEPORT: 2219 case PRIV_NETIPX_RESERVEDPORT: 2220 case PRIV_NETIPX_RAW: 2221 break; 2222 2223 /* 2224 * All remaining system privileges are allow only if the process 2225 * holds privilege with respect to the LOMAC policy. 2226 */ 2227 default: 2228 subj = SLOT(cred->cr_label); 2229 error = lomac_subject_privileged(subj); 2230 if (error) 2231 return (error); 2232 } 2233 return (0); 2234} 2235 2236 2237static int 2238lomac_system_check_acct(struct ucred *cred, struct vnode *vp, 2239 struct label *vplabel) 2240{ 2241 struct mac_lomac *subj, *obj; 2242 2243 if (!lomac_enabled) 2244 return (0); 2245 2246 subj = SLOT(cred->cr_label); 2247 obj = SLOT(vplabel); 2248 2249 if (lomac_subject_privileged(subj)) 2250 return (EPERM); 2251 2252 if (!lomac_high_single(obj)) 2253 return (EACCES); 2254 2255 return (0); 2256} 2257 2258static int 2259lomac_system_check_auditctl(struct ucred *cred, struct vnode *vp, 2260 struct label *vplabel) 2261{ 2262 struct mac_lomac *subj, *obj; 2263 2264 if (!lomac_enabled) 2265 return (0); 2266 2267 subj = SLOT(cred->cr_label); 2268 obj = SLOT(vplabel); 2269 2270 if (lomac_subject_privileged(subj)) 2271 return (EPERM); 2272 2273 if (!lomac_high_single(obj)) 2274 return (EACCES); 2275 2276 return (0); 2277} 2278 2279static int 2280lomac_system_check_swapoff(struct ucred *cred, struct vnode *vp, 2281 struct label *vplabel) 2282{ 2283 struct mac_lomac *subj; 2284 2285 if (!lomac_enabled) 2286 return (0); 2287 2288 subj = SLOT(cred->cr_label); 2289 2290 if (lomac_subject_privileged(subj)) 2291 return (EPERM); 2292 2293 return (0); 2294} 2295 2296static int 2297lomac_system_check_swapon(struct ucred *cred, struct vnode *vp, 2298 struct label *vplabel) 2299{ 2300 struct mac_lomac *subj, *obj; 2301 2302 if (!lomac_enabled) 2303 return (0); 2304 2305 subj = SLOT(cred->cr_label); 2306 obj = SLOT(vplabel); 2307 2308 if (lomac_subject_privileged(subj)) 2309 return (EPERM); 2310 2311 if (!lomac_high_single(obj)) 2312 return (EACCES); 2313 2314 return (0); 2315} 2316 2317static int 2318lomac_system_check_sysctl(struct ucred *cred, struct sysctl_oid *oidp, 2319 void *arg1, int arg2, struct sysctl_req *req) 2320{ 2321 struct mac_lomac *subj; 2322 2323 if (!lomac_enabled) 2324 return (0); 2325 2326 subj = SLOT(cred->cr_label); 2327 2328 /* 2329 * Treat sysctl variables without CTLFLAG_ANYBODY flag as lomac/high, 2330 * but also require privilege to change them. 2331 */ 2332 if (req->newptr != NULL && (oidp->oid_kind & CTLFLAG_ANYBODY) == 0) { 2333#ifdef notdef 2334 if (!lomac_subject_dominate_high(subj)) 2335 return (EACCES); 2336#endif 2337 2338 if (lomac_subject_privileged(subj)) 2339 return (EPERM); 2340 } 2341 2342 return (0); 2343} 2344 2345static int 2346lomac_vnode_check_create(struct ucred *cred, struct vnode *dvp, 2347 struct label *dvplabel, struct componentname *cnp, struct vattr *vap) 2348{ 2349 struct mac_lomac *subj, *obj; 2350 2351 if (!lomac_enabled) 2352 return (0); 2353 2354 subj = SLOT(cred->cr_label); 2355 obj = SLOT(dvplabel); 2356 2357 if (!lomac_subject_dominate(subj, obj)) 2358 return (EACCES); 2359 if (obj->ml_flags & MAC_LOMAC_FLAG_AUX && 2360 !lomac_dominate_element(&subj->ml_single, &obj->ml_auxsingle)) 2361 return (EACCES); 2362 2363 return (0); 2364} 2365 2366static int 2367lomac_vnode_check_deleteacl(struct ucred *cred, struct vnode *vp, 2368 struct label *vplabel, acl_type_t type) 2369{ 2370 struct mac_lomac *subj, *obj; 2371 2372 if (!lomac_enabled) 2373 return (0); 2374 2375 subj = SLOT(cred->cr_label); 2376 obj = SLOT(vplabel); 2377 2378 if (!lomac_subject_dominate(subj, obj)) 2379 return (EACCES); 2380 2381 return (0); 2382} 2383 2384static int 2385lomac_vnode_check_link(struct ucred *cred, struct vnode *dvp, 2386 struct label *dvplabel, struct vnode *vp, struct label *vplabel, 2387 struct componentname *cnp) 2388{ 2389 struct mac_lomac *subj, *obj; 2390 2391 if (!lomac_enabled) 2392 return (0); 2393 2394 subj = SLOT(cred->cr_label); 2395 obj = SLOT(dvplabel); 2396 2397 if (!lomac_subject_dominate(subj, obj)) 2398 return (EACCES); 2399 2400 obj = SLOT(vplabel); 2401 2402 if (!lomac_subject_dominate(subj, obj)) 2403 return (EACCES); 2404 2405 return (0); 2406} 2407 2408static int 2409lomac_vnode_check_mmap(struct ucred *cred, struct vnode *vp, 2410 struct label *vplabel, int prot, int flags) 2411{ 2412 struct mac_lomac *subj, *obj; 2413 2414 /* 2415 * Rely on the use of open()-time protections to handle 2416 * non-revocation cases. 2417 */ 2418 if (!lomac_enabled) 2419 return (0); 2420 2421 subj = SLOT(cred->cr_label); 2422 obj = SLOT(vplabel); 2423 2424 if (((prot & VM_PROT_WRITE) != 0) && ((flags & MAP_SHARED) != 0)) { 2425 if (!lomac_subject_dominate(subj, obj)) 2426 return (EACCES); 2427 } 2428 if (prot & (VM_PROT_READ | VM_PROT_EXECUTE)) { 2429 if (!lomac_dominate_single(obj, subj)) 2430 return (maybe_demote(subj, obj, "mapping", "file", vp)); 2431 } 2432 2433 return (0); 2434} 2435 2436static void 2437lomac_vnode_check_mmap_downgrade(struct ucred *cred, struct vnode *vp, 2438 struct label *vplabel, /* XXX vm_prot_t */ int *prot) 2439{ 2440 struct mac_lomac *subj, *obj; 2441 2442 /* 2443 * Rely on the use of open()-time protections to handle 2444 * non-revocation cases. 2445 */ 2446 if (!lomac_enabled || !revocation_enabled) 2447 return; 2448 2449 subj = SLOT(cred->cr_label); 2450 obj = SLOT(vplabel); 2451 2452 if (!lomac_subject_dominate(subj, obj)) 2453 *prot &= ~VM_PROT_WRITE; 2454} 2455 2456static int 2457lomac_vnode_check_open(struct ucred *cred, struct vnode *vp, 2458 struct label *vplabel, int acc_mode) 2459{ 2460 struct mac_lomac *subj, *obj; 2461 2462 if (!lomac_enabled) 2463 return (0); 2464 2465 subj = SLOT(cred->cr_label); 2466 obj = SLOT(vplabel); 2467 2468 /* XXX privilege override for admin? */ 2469 if (acc_mode & (VWRITE | VAPPEND | VADMIN)) { 2470 if (!lomac_subject_dominate(subj, obj)) 2471 return (EACCES); 2472 } 2473 2474 return (0); 2475} 2476 2477static int 2478lomac_vnode_check_read(struct ucred *active_cred, struct ucred *file_cred, 2479 struct vnode *vp, struct label *vplabel) 2480{ 2481 struct mac_lomac *subj, *obj; 2482 2483 if (!lomac_enabled || !revocation_enabled) 2484 return (0); 2485 2486 subj = SLOT(active_cred->cr_label); 2487 obj = SLOT(vplabel); 2488 2489 if (!lomac_dominate_single(obj, subj)) 2490 return (maybe_demote(subj, obj, "reading", "file", vp)); 2491 2492 return (0); 2493} 2494 2495static int 2496lomac_vnode_check_relabel(struct ucred *cred, struct vnode *vp, 2497 struct label *vplabel, struct label *newlabel) 2498{ 2499 struct mac_lomac *old, *new, *subj; 2500 int error; 2501 2502 old = SLOT(vplabel); 2503 new = SLOT(newlabel); 2504 subj = SLOT(cred->cr_label); 2505 2506 /* 2507 * If there is a LOMAC label update for the vnode, it must be a 2508 * single label, with an optional explicit auxiliary single. 2509 */ 2510 error = lomac_atmostflags(new, 2511 MAC_LOMAC_FLAG_SINGLE | MAC_LOMAC_FLAG_AUX); 2512 if (error) 2513 return (error); 2514 2515 /* 2516 * To perform a relabel of the vnode (LOMAC label or not), LOMAC must 2517 * authorize the relabel. 2518 */ 2519 if (!lomac_single_in_range(old, subj)) 2520 return (EPERM); 2521 2522 /* 2523 * If the LOMAC label is to be changed, authorize as appropriate. 2524 */ 2525 if (new->ml_flags & MAC_LOMAC_FLAG_SINGLE) { 2526 /* 2527 * To change the LOMAC label on a vnode, the new vnode label 2528 * must be in the subject range. 2529 */ 2530 if (!lomac_single_in_range(new, subj)) 2531 return (EPERM); 2532 2533 /* 2534 * To change the LOMAC label on the vnode to be EQUAL, the 2535 * subject must have appropriate privilege. 2536 */ 2537 if (lomac_contains_equal(new)) { 2538 error = lomac_subject_privileged(subj); 2539 if (error) 2540 return (error); 2541 } 2542 } 2543 if (new->ml_flags & MAC_LOMAC_FLAG_AUX) { 2544 /* 2545 * Fill in the missing parts from the previous label. 2546 */ 2547 if ((new->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0) 2548 lomac_copy_single(subj, new); 2549 2550 /* 2551 * To change the auxiliary LOMAC label on a vnode, the new 2552 * vnode label must be in the subject range. 2553 */ 2554 if (!lomac_auxsingle_in_range(new, subj)) 2555 return (EPERM); 2556 2557 /* 2558 * To change the auxiliary LOMAC label on the vnode to be 2559 * EQUAL, the subject must have appropriate privilege. 2560 */ 2561 if (lomac_contains_equal(new)) { 2562 error = lomac_subject_privileged(subj); 2563 if (error) 2564 return (error); 2565 } 2566 } 2567 2568 return (0); 2569} 2570 2571static int 2572lomac_vnode_check_rename_from(struct ucred *cred, struct vnode *dvp, 2573 struct label *dvplabel, struct vnode *vp, struct label *vplabel, 2574 struct componentname *cnp) 2575{ 2576 struct mac_lomac *subj, *obj; 2577 2578 if (!lomac_enabled) 2579 return (0); 2580 2581 subj = SLOT(cred->cr_label); 2582 obj = SLOT(dvplabel); 2583 2584 if (!lomac_subject_dominate(subj, obj)) 2585 return (EACCES); 2586 2587 obj = SLOT(vplabel); 2588 2589 if (!lomac_subject_dominate(subj, obj)) 2590 return (EACCES); 2591 2592 return (0); 2593} 2594 2595static int 2596lomac_vnode_check_rename_to(struct ucred *cred, struct vnode *dvp, 2597 struct label *dvplabel, struct vnode *vp, struct label *vplabel, 2598 int samedir, struct componentname *cnp) 2599{ 2600 struct mac_lomac *subj, *obj; 2601 2602 if (!lomac_enabled) 2603 return (0); 2604 2605 subj = SLOT(cred->cr_label); 2606 obj = SLOT(dvplabel); 2607 2608 if (!lomac_subject_dominate(subj, obj)) 2609 return (EACCES); 2610 2611 if (vp != NULL) { 2612 obj = SLOT(vplabel); 2613 2614 if (!lomac_subject_dominate(subj, obj)) 2615 return (EACCES); 2616 } 2617 2618 return (0); 2619} 2620 2621static int 2622lomac_vnode_check_revoke(struct ucred *cred, struct vnode *vp, 2623 struct label *vplabel) 2624{ 2625 struct mac_lomac *subj, *obj; 2626 2627 if (!lomac_enabled) 2628 return (0); 2629 2630 subj = SLOT(cred->cr_label); 2631 obj = SLOT(vplabel); 2632 2633 if (!lomac_subject_dominate(subj, obj)) 2634 return (EACCES); 2635 2636 return (0); 2637} 2638 2639static int 2640lomac_vnode_check_setacl(struct ucred *cred, struct vnode *vp, 2641 struct label *vplabel, acl_type_t type, struct acl *acl) 2642{ 2643 struct mac_lomac *subj, *obj; 2644 2645 if (!lomac_enabled) 2646 return (0); 2647 2648 subj = SLOT(cred->cr_label); 2649 obj = SLOT(vplabel); 2650 2651 if (!lomac_subject_dominate(subj, obj)) 2652 return (EACCES); 2653 2654 return (0); 2655} 2656 2657static int 2658lomac_vnode_check_setextattr(struct ucred *cred, struct vnode *vp, 2659 struct label *vplabel, int attrnamespace, const char *name, 2660 struct uio *uio) 2661{ 2662 struct mac_lomac *subj, *obj; 2663 2664 if (!lomac_enabled) 2665 return (0); 2666 2667 subj = SLOT(cred->cr_label); 2668 obj = SLOT(vplabel); 2669 2670 if (!lomac_subject_dominate(subj, obj)) 2671 return (EACCES); 2672 2673 /* XXX: protect the MAC EA in a special way? */ 2674 2675 return (0); 2676} 2677 2678static int 2679lomac_vnode_check_setflags(struct ucred *cred, struct vnode *vp, 2680 struct label *vplabel, u_long flags) 2681{ 2682 struct mac_lomac *subj, *obj; 2683 2684 if (!lomac_enabled) 2685 return (0); 2686 2687 subj = SLOT(cred->cr_label); 2688 obj = SLOT(vplabel); 2689 2690 if (!lomac_subject_dominate(subj, obj)) 2691 return (EACCES); 2692 2693 return (0); 2694} 2695 2696static int 2697lomac_vnode_check_setmode(struct ucred *cred, struct vnode *vp, 2698 struct label *vplabel, mode_t mode) 2699{ 2700 struct mac_lomac *subj, *obj; 2701 2702 if (!lomac_enabled) 2703 return (0); 2704 2705 subj = SLOT(cred->cr_label); 2706 obj = SLOT(vplabel); 2707 2708 if (!lomac_subject_dominate(subj, obj)) 2709 return (EACCES); 2710 2711 return (0); 2712} 2713 2714static int 2715lomac_vnode_check_setowner(struct ucred *cred, struct vnode *vp, 2716 struct label *vplabel, uid_t uid, gid_t gid) 2717{ 2718 struct mac_lomac *subj, *obj; 2719 2720 if (!lomac_enabled) 2721 return (0); 2722 2723 subj = SLOT(cred->cr_label); 2724 obj = SLOT(vplabel); 2725 2726 if (!lomac_subject_dominate(subj, obj)) 2727 return (EACCES); 2728 2729 return (0); 2730} 2731 2732static int 2733lomac_vnode_check_setutimes(struct ucred *cred, struct vnode *vp, 2734 struct label *vplabel, struct timespec atime, struct timespec mtime) 2735{ 2736 struct mac_lomac *subj, *obj; 2737 2738 if (!lomac_enabled) 2739 return (0); 2740 2741 subj = SLOT(cred->cr_label); 2742 obj = SLOT(vplabel); 2743 2744 if (!lomac_subject_dominate(subj, obj)) 2745 return (EACCES); 2746 2747 return (0); 2748} 2749 2750static int 2751lomac_vnode_check_unlink(struct ucred *cred, struct vnode *dvp, 2752 struct label *dvplabel, struct vnode *vp, struct label *vplabel, 2753 struct componentname *cnp) 2754{ 2755 struct mac_lomac *subj, *obj; 2756 2757 if (!lomac_enabled) 2758 return (0); 2759 2760 subj = SLOT(cred->cr_label); 2761 obj = SLOT(dvplabel); 2762 2763 if (!lomac_subject_dominate(subj, obj)) 2764 return (EACCES); 2765 2766 obj = SLOT(vplabel); 2767 2768 if (!lomac_subject_dominate(subj, obj)) 2769 return (EACCES); 2770 2771 return (0); 2772} 2773 2774static int 2775lomac_vnode_check_write(struct ucred *active_cred, 2776 struct ucred *file_cred, struct vnode *vp, struct label *vplabel) 2777{ 2778 struct mac_lomac *subj, *obj; 2779 2780 if (!lomac_enabled || !revocation_enabled) 2781 return (0); 2782 2783 subj = SLOT(active_cred->cr_label); 2784 obj = SLOT(vplabel); 2785 2786 if (!lomac_subject_dominate(subj, obj)) 2787 return (EACCES); 2788 2789 return (0); 2790} 2791 2792static void 2793lomac_thread_userret(struct thread *td) 2794{ 2795 struct proc *p = td->td_proc; 2796 struct mac_lomac_proc *subj = PSLOT(p->p_label); 2797 struct ucred *newcred, *oldcred; 2798 int dodrop; 2799 2800 mtx_lock(&subj->mtx); 2801 if (subj->mac_lomac.ml_flags & MAC_LOMAC_FLAG_UPDATE) { 2802 dodrop = 0; 2803 mtx_unlock(&subj->mtx); 2804 newcred = crget(); 2805 /* 2806 * Prevent a lock order reversal in 2807 * mac_cred_mmapped_drop_perms; ideally, the other user of 2808 * subj->mtx wouldn't be holding Giant. 2809 */ 2810 mtx_lock(&Giant); 2811 PROC_LOCK(p); 2812 mtx_lock(&subj->mtx); 2813 /* 2814 * Check if we lost the race while allocating the cred. 2815 */ 2816 if ((subj->mac_lomac.ml_flags & MAC_LOMAC_FLAG_UPDATE) == 0) { 2817 crfree(newcred); 2818 goto out; 2819 } 2820 oldcred = p->p_ucred; 2821 crcopy(newcred, oldcred); 2822 crhold(newcred); 2823 lomac_copy(&subj->mac_lomac, SLOT(newcred->cr_label)); 2824 p->p_ucred = newcred; 2825 crfree(oldcred); 2826 dodrop = 1; 2827 out: 2828 mtx_unlock(&subj->mtx); 2829 PROC_UNLOCK(p); 2830 if (dodrop) 2831 mac_cred_mmapped_drop_perms(curthread, newcred); 2832 mtx_unlock(&Giant); 2833 } else { 2834 mtx_unlock(&subj->mtx); 2835 } 2836} 2837 2838static struct mac_policy_ops lomac_ops = 2839{ 2840 .mpo_init = lomac_init, 2841 .mpo_bpfdesc_init_label = lomac_init_label, 2842 .mpo_cred_init_label = lomac_init_label, 2843 .mpo_devfs_init_label = lomac_init_label, 2844 .mpo_ifnet_init_label = lomac_init_label, 2845 .mpo_syncache_init_label = lomac_init_label_waitcheck, 2846 .mpo_inpcb_init_label = lomac_init_label_waitcheck, 2847 .mpo_ipq_init_label = lomac_init_label_waitcheck, 2848 .mpo_mbuf_init_label = lomac_init_label_waitcheck, 2849 .mpo_mount_init_label = lomac_init_label, 2850 .mpo_pipe_init_label = lomac_init_label, 2851 .mpo_proc_init_label = lomac_proc_init_label, 2852 .mpo_socket_init_label = lomac_init_label_waitcheck, 2853 .mpo_socketpeer_init_label = lomac_init_label_waitcheck, 2854 .mpo_vnode_init_label = lomac_init_label, 2855 .mpo_syncache_create = lomac_syncache_create, 2856 .mpo_bpfdesc_destroy_label = lomac_destroy_label, 2857 .mpo_cred_destroy_label = lomac_destroy_label, 2858 .mpo_devfs_destroy_label = lomac_destroy_label, 2859 .mpo_ifnet_destroy_label = lomac_destroy_label, 2860 .mpo_inpcb_destroy_label = lomac_destroy_label, 2861 .mpo_ipq_destroy_label = lomac_destroy_label, 2862 .mpo_mbuf_destroy_label = lomac_destroy_label, 2863 .mpo_mount_destroy_label = lomac_destroy_label, 2864 .mpo_pipe_destroy_label = lomac_destroy_label, 2865 .mpo_proc_destroy_label = lomac_proc_destroy_label, 2866 .mpo_syncache_destroy_label = lomac_destroy_label, 2867 .mpo_socket_destroy_label = lomac_destroy_label, 2868 .mpo_socketpeer_destroy_label = lomac_destroy_label, 2869 .mpo_vnode_destroy_label = lomac_destroy_label, 2870 .mpo_cred_copy_label = lomac_copy_label, 2871 .mpo_ifnet_copy_label = lomac_copy_label, 2872 .mpo_mbuf_copy_label = lomac_copy_label, 2873 .mpo_pipe_copy_label = lomac_copy_label, 2874 .mpo_socket_copy_label = lomac_copy_label, 2875 .mpo_vnode_copy_label = lomac_copy_label, 2876 .mpo_cred_externalize_label = lomac_externalize_label, 2877 .mpo_ifnet_externalize_label = lomac_externalize_label, 2878 .mpo_pipe_externalize_label = lomac_externalize_label, 2879 .mpo_socket_externalize_label = lomac_externalize_label, 2880 .mpo_socketpeer_externalize_label = lomac_externalize_label, 2881 .mpo_vnode_externalize_label = lomac_externalize_label, 2882 .mpo_cred_internalize_label = lomac_internalize_label, 2883 .mpo_ifnet_internalize_label = lomac_internalize_label, 2884 .mpo_pipe_internalize_label = lomac_internalize_label, 2885 .mpo_socket_internalize_label = lomac_internalize_label, 2886 .mpo_vnode_internalize_label = lomac_internalize_label, 2887 .mpo_devfs_create_device = lomac_devfs_create_device, 2888 .mpo_devfs_create_directory = lomac_devfs_create_directory, 2889 .mpo_devfs_create_symlink = lomac_devfs_create_symlink, 2890 .mpo_mount_create = lomac_mount_create, 2891 .mpo_vnode_relabel = lomac_vnode_relabel, 2892 .mpo_devfs_update = lomac_devfs_update, 2893 .mpo_devfs_vnode_associate = lomac_devfs_vnode_associate, 2894 .mpo_vnode_associate_extattr = lomac_vnode_associate_extattr, 2895 .mpo_vnode_associate_singlelabel = lomac_vnode_associate_singlelabel, 2896 .mpo_vnode_create_extattr = lomac_vnode_create_extattr, 2897 .mpo_vnode_setlabel_extattr = lomac_vnode_setlabel_extattr, 2898 .mpo_socket_create_mbuf = lomac_socket_create_mbuf, 2899 .mpo_syncache_create_mbuf = lomac_syncache_create_mbuf, 2900 .mpo_pipe_create = lomac_pipe_create, 2901 .mpo_socket_create = lomac_socket_create, 2902 .mpo_socket_newconn = lomac_socket_newconn, 2903 .mpo_pipe_relabel = lomac_pipe_relabel, 2904 .mpo_socket_relabel = lomac_socket_relabel, 2905 .mpo_socketpeer_set_from_mbuf = lomac_socketpeer_set_from_mbuf, 2906 .mpo_socketpeer_set_from_socket = lomac_socketpeer_set_from_socket, 2907 .mpo_bpfdesc_create = lomac_bpfdesc_create, 2908 .mpo_ipq_reassemble = lomac_ipq_reassemble, 2909 .mpo_netinet_fragment = lomac_netinet_fragment, 2910 .mpo_ifnet_create = lomac_ifnet_create, 2911 .mpo_inpcb_create = lomac_inpcb_create, 2912 .mpo_ipq_create = lomac_ipq_create, 2913 .mpo_inpcb_create_mbuf = lomac_inpcb_create_mbuf, 2914 .mpo_bpfdesc_create_mbuf = lomac_bpfdesc_create_mbuf, 2915 .mpo_ifnet_create_mbuf = lomac_ifnet_create_mbuf, 2916 .mpo_mbuf_create_multicast_encap = lomac_mbuf_create_multicast_encap, 2917 .mpo_mbuf_create_netlayer = lomac_mbuf_create_netlayer, 2918 .mpo_ipq_match = lomac_ipq_match, 2919 .mpo_ifnet_relabel = lomac_ifnet_relabel, 2920 .mpo_ipq_update = lomac_ipq_update, 2921 .mpo_inpcb_sosetlabel = lomac_inpcb_sosetlabel, 2922 .mpo_vnode_execve_transition = lomac_vnode_execve_transition, 2923 .mpo_vnode_execve_will_transition = 2924 lomac_vnode_execve_will_transition, 2925 .mpo_proc_create_swapper = lomac_proc_create_swapper, 2926 .mpo_proc_create_init = lomac_proc_create_init, 2927 .mpo_cred_relabel = lomac_cred_relabel, 2928 .mpo_bpfdesc_check_receive = lomac_bpfdesc_check_receive, 2929 .mpo_cred_check_relabel = lomac_cred_check_relabel, 2930 .mpo_cred_check_visible = lomac_cred_check_visible, 2931 .mpo_ifnet_check_relabel = lomac_ifnet_check_relabel, 2932 .mpo_ifnet_check_transmit = lomac_ifnet_check_transmit, 2933 .mpo_inpcb_check_deliver = lomac_inpcb_check_deliver, 2934 .mpo_kld_check_load = lomac_kld_check_load, 2935 .mpo_pipe_check_ioctl = lomac_pipe_check_ioctl, 2936 .mpo_pipe_check_read = lomac_pipe_check_read, 2937 .mpo_pipe_check_relabel = lomac_pipe_check_relabel, 2938 .mpo_pipe_check_write = lomac_pipe_check_write, 2939 .mpo_proc_check_debug = lomac_proc_check_debug, 2940 .mpo_proc_check_sched = lomac_proc_check_sched, 2941 .mpo_proc_check_signal = lomac_proc_check_signal, 2942 .mpo_socket_check_deliver = lomac_socket_check_deliver, 2943 .mpo_socket_check_relabel = lomac_socket_check_relabel, 2944 .mpo_socket_check_visible = lomac_socket_check_visible, 2945 .mpo_system_check_acct = lomac_system_check_acct, 2946 .mpo_system_check_auditctl = lomac_system_check_auditctl, 2947 .mpo_system_check_swapoff = lomac_system_check_swapoff, 2948 .mpo_system_check_swapon = lomac_system_check_swapon, 2949 .mpo_system_check_sysctl = lomac_system_check_sysctl, 2950 .mpo_vnode_check_access = lomac_vnode_check_open, 2951 .mpo_vnode_check_create = lomac_vnode_check_create, 2952 .mpo_vnode_check_deleteacl = lomac_vnode_check_deleteacl, 2953 .mpo_vnode_check_link = lomac_vnode_check_link, 2954 .mpo_vnode_check_mmap = lomac_vnode_check_mmap, 2955 .mpo_vnode_check_mmap_downgrade = lomac_vnode_check_mmap_downgrade, 2956 .mpo_vnode_check_open = lomac_vnode_check_open, 2957 .mpo_vnode_check_read = lomac_vnode_check_read, 2958 .mpo_vnode_check_relabel = lomac_vnode_check_relabel, 2959 .mpo_vnode_check_rename_from = lomac_vnode_check_rename_from, 2960 .mpo_vnode_check_rename_to = lomac_vnode_check_rename_to, 2961 .mpo_vnode_check_revoke = lomac_vnode_check_revoke, 2962 .mpo_vnode_check_setacl = lomac_vnode_check_setacl, 2963 .mpo_vnode_check_setextattr = lomac_vnode_check_setextattr, 2964 .mpo_vnode_check_setflags = lomac_vnode_check_setflags, 2965 .mpo_vnode_check_setmode = lomac_vnode_check_setmode, 2966 .mpo_vnode_check_setowner = lomac_vnode_check_setowner, 2967 .mpo_vnode_check_setutimes = lomac_vnode_check_setutimes, 2968 .mpo_vnode_check_unlink = lomac_vnode_check_unlink, 2969 .mpo_vnode_check_write = lomac_vnode_check_write, 2970 .mpo_thread_userret = lomac_thread_userret, 2971 .mpo_netatalk_aarp_send = lomac_netatalk_aarp_send, 2972 .mpo_netinet_arp_send = lomac_netinet_arp_send, 2973 .mpo_netinet_firewall_send = lomac_netinet_firewall_send, 2974 .mpo_netinet_igmp_send = lomac_netinet_igmp_send, 2975 .mpo_netinet6_nd6_send = lomac_netinet6_nd6_send, 2976 .mpo_priv_check = lomac_priv_check, 2977}; 2978 2979MAC_POLICY_SET(&lomac_ops, mac_lomac, "TrustedBSD MAC/LOMAC", 2980 MPC_LOADTIME_FLAG_NOTLATE | MPC_LOADTIME_FLAG_LABELMBUFS, &lomac_slot); 2981