mac_lomac.c revision 173108
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 173108 2007-10-28 17:55:57Z 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 int 1359lomac_ipq_match(struct mbuf *m, struct label *mlabel, struct ipq *ipq, 1360 struct label *ipqlabel) 1361{ 1362 struct mac_lomac *a, *b; 1363 1364 a = SLOT(ipqlabel); 1365 b = SLOT(mlabel); 1366 1367 return (lomac_equal_single(a, b)); 1368} 1369 1370static void 1371lomac_ifnet_relabel(struct ucred *cred, struct ifnet *ifp, 1372 struct label *ifplabel, struct label *newlabel) 1373{ 1374 struct mac_lomac *source, *dest; 1375 1376 source = SLOT(newlabel); 1377 dest = SLOT(ifplabel); 1378 1379 try_relabel(source, dest); 1380} 1381 1382static void 1383lomac_ipq_update(struct mbuf *m, struct label *mlabel, struct ipq *ipq, 1384 struct label *ipqlabel) 1385{ 1386 1387 /* NOOP: we only accept matching labels, so no need to update */ 1388} 1389 1390static void 1391lomac_inpcb_sosetlabel(struct socket *so, struct label *solabel, 1392 struct inpcb *inp, struct label *inplabel) 1393{ 1394 struct mac_lomac *source, *dest; 1395 1396 source = SLOT(solabel); 1397 dest = SLOT(inplabel); 1398 1399 lomac_copy_single(source, dest); 1400} 1401 1402static void 1403lomac_syncache_create(struct label *label, struct inpcb *inp) 1404{ 1405 struct mac_lomac *source, *dest; 1406 1407 source = SLOT(inp->inp_label); 1408 dest = SLOT(label); 1409 lomac_copy(source, dest); 1410} 1411 1412static void 1413lomac_syncache_create_mbuf(struct label *sc_label, struct mbuf *m, 1414 struct label *mlabel) 1415{ 1416 struct mac_lomac *source, *dest; 1417 1418 source = SLOT(sc_label); 1419 dest = SLOT(mlabel); 1420 lomac_copy(source, dest); 1421} 1422 1423static void 1424lomac_netatalk_aarp_send(struct ifnet *ifp, struct label *ifplabel, 1425 struct mbuf *m, struct label *mlabel) 1426{ 1427 struct mac_lomac *dest; 1428 1429 dest = SLOT(mlabel); 1430 1431 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0); 1432} 1433 1434static void 1435lomac_netinet_arp_send(struct ifnet *ifp, struct label *ifplabel, 1436 struct mbuf *m, struct label *mlabel) 1437{ 1438 struct mac_lomac *dest; 1439 1440 dest = SLOT(mlabel); 1441 1442 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0); 1443} 1444 1445static void 1446lomac_netinet_firewall_reply(struct mbuf *mrecv, struct label *mrecvlabel, 1447 struct mbuf *msend, struct label *msendlabel) 1448{ 1449 struct mac_lomac *source, *dest; 1450 1451 source = SLOT(mrecvlabel); 1452 dest = SLOT(msendlabel); 1453 1454 lomac_copy_single(source, dest); 1455} 1456 1457static void 1458lomac_netinet_firewall_send(struct mbuf *m, struct label *mlabel) 1459{ 1460 struct mac_lomac *dest; 1461 1462 dest = SLOT(mlabel); 1463 1464 /* XXX: where is the label for the firewall really comming from? */ 1465 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0); 1466} 1467 1468static void 1469lomac_netinet_icmp_reply(struct mbuf *mrecv, struct label *mrecvlabel, 1470 struct mbuf *msend, struct label *msendlabel) 1471{ 1472 struct mac_lomac *source, *dest; 1473 1474 source = SLOT(mrecvlabel); 1475 dest = SLOT(msendlabel); 1476 1477 lomac_copy_single(source, dest); 1478} 1479 1480static void 1481lomac_netinet_igmp_send(struct ifnet *ifp, struct label *ifplabel, 1482 struct mbuf *m, struct label *mlabel) 1483{ 1484 struct mac_lomac *dest; 1485 1486 dest = SLOT(mlabel); 1487 1488 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0); 1489} 1490 1491static void 1492lomac_netinet6_nd6_send(struct ifnet *ifp, struct label *ifplabel, 1493 struct mbuf *m, struct label *mlabel) 1494{ 1495 struct mac_lomac *dest; 1496 1497 dest = SLOT(mlabel); 1498 1499 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0); 1500} 1501 1502/* 1503 * Labeling event operations: processes. 1504 */ 1505static void 1506lomac_vnode_execve_transition(struct ucred *old, struct ucred *new, 1507 struct vnode *vp, struct label *vplabel, struct label *interpvplabel, 1508 struct image_params *imgp, struct label *execlabel) 1509{ 1510 struct mac_lomac *source, *dest, *obj, *robj; 1511 1512 source = SLOT(old->cr_label); 1513 dest = SLOT(new->cr_label); 1514 obj = SLOT(vplabel); 1515 robj = interpvplabel != NULL ? SLOT(interpvplabel) : obj; 1516 1517 lomac_copy(source, dest); 1518 /* 1519 * If there's an auxiliary label on the real object, respect it and 1520 * assume that this level should be assumed immediately if a higher 1521 * level is currently in place. 1522 */ 1523 if (robj->ml_flags & MAC_LOMAC_FLAG_AUX && 1524 !lomac_dominate_element(&robj->ml_auxsingle, &dest->ml_single) 1525 && lomac_auxsingle_in_range(robj, dest)) 1526 lomac_set_single(dest, robj->ml_auxsingle.mle_type, 1527 robj->ml_auxsingle.mle_grade); 1528 /* 1529 * Restructuring to use the execve transitioning mechanism instead of 1530 * the normal demotion mechanism here would be difficult, so just 1531 * copy the label over and perform standard demotion. This is also 1532 * non-optimal because it will result in the intermediate label "new" 1533 * being created and immediately recycled. 1534 */ 1535 if (lomac_enabled && revocation_enabled && 1536 !lomac_dominate_single(obj, source)) 1537 (void)maybe_demote(source, obj, "executing", "file", vp); 1538} 1539 1540static int 1541lomac_vnode_execve_will_transition(struct ucred *old, struct vnode *vp, 1542 struct label *vplabel, struct label *interpvplabel, 1543 struct image_params *imgp, struct label *execlabel) 1544{ 1545 struct mac_lomac *subj, *obj, *robj; 1546 1547 if (!lomac_enabled || !revocation_enabled) 1548 return (0); 1549 1550 subj = SLOT(old->cr_label); 1551 obj = SLOT(vplabel); 1552 robj = interpvplabel != NULL ? SLOT(interpvplabel) : obj; 1553 1554 return ((robj->ml_flags & MAC_LOMAC_FLAG_AUX && 1555 !lomac_dominate_element(&robj->ml_auxsingle, &subj->ml_single) 1556 && lomac_auxsingle_in_range(robj, subj)) || 1557 !lomac_dominate_single(obj, subj)); 1558} 1559 1560static void 1561lomac_proc_create_swapper(struct ucred *cred) 1562{ 1563 struct mac_lomac *dest; 1564 1565 dest = SLOT(cred->cr_label); 1566 1567 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0); 1568 lomac_set_range(dest, MAC_LOMAC_TYPE_LOW, 0, MAC_LOMAC_TYPE_HIGH, 0); 1569} 1570 1571static void 1572lomac_proc_create_init(struct ucred *cred) 1573{ 1574 struct mac_lomac *dest; 1575 1576 dest = SLOT(cred->cr_label); 1577 1578 lomac_set_single(dest, MAC_LOMAC_TYPE_HIGH, 0); 1579 lomac_set_range(dest, MAC_LOMAC_TYPE_LOW, 0, MAC_LOMAC_TYPE_HIGH, 0); 1580} 1581 1582static void 1583lomac_cred_relabel(struct ucred *cred, struct label *newlabel) 1584{ 1585 struct mac_lomac *source, *dest; 1586 1587 source = SLOT(newlabel); 1588 dest = SLOT(cred->cr_label); 1589 1590 try_relabel(source, dest); 1591} 1592 1593/* 1594 * Access control checks. 1595 */ 1596static int 1597lomac_bpfdesc_check_receive(struct bpf_d *d, struct label *dlabel, 1598 struct ifnet *ifp, struct label *ifplabel) 1599{ 1600 struct mac_lomac *a, *b; 1601 1602 if (!lomac_enabled) 1603 return (0); 1604 1605 a = SLOT(dlabel); 1606 b = SLOT(ifplabel); 1607 1608 if (lomac_equal_single(a, b)) 1609 return (0); 1610 return (EACCES); 1611} 1612 1613static int 1614lomac_cred_check_relabel(struct ucred *cred, struct label *newlabel) 1615{ 1616 struct mac_lomac *subj, *new; 1617 int error; 1618 1619 subj = SLOT(cred->cr_label); 1620 new = SLOT(newlabel); 1621 1622 /* 1623 * If there is a LOMAC label update for the credential, it may be an 1624 * update of the single, range, or both. 1625 */ 1626 error = lomac_atmostflags(new, MAC_LOMAC_FLAGS_BOTH); 1627 if (error) 1628 return (error); 1629 1630 /* 1631 * If the LOMAC label is to be changed, authorize as appropriate. 1632 */ 1633 if (new->ml_flags & MAC_LOMAC_FLAGS_BOTH) { 1634 /* 1635 * Fill in the missing parts from the previous label. 1636 */ 1637 if ((new->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0) 1638 lomac_copy_single(subj, new); 1639 if ((new->ml_flags & MAC_LOMAC_FLAG_RANGE) == 0) 1640 lomac_copy_range(subj, new); 1641 1642 /* 1643 * To change the LOMAC range on a credential, the new range 1644 * label must be in the current range. 1645 */ 1646 if (!lomac_range_in_range(new, subj)) 1647 return (EPERM); 1648 1649 /* 1650 * To change the LOMAC single label on a credential, the new 1651 * single label must be in the new range. Implicitly from 1652 * the previous check, the new single is in the old range. 1653 */ 1654 if (!lomac_single_in_range(new, new)) 1655 return (EPERM); 1656 1657 /* 1658 * To have EQUAL in any component of the new credential LOMAC 1659 * label, the subject must already have EQUAL in their label. 1660 */ 1661 if (lomac_contains_equal(new)) { 1662 error = lomac_subject_privileged(subj); 1663 if (error) 1664 return (error); 1665 } 1666 1667 /* 1668 * XXXMAC: Additional consistency tests regarding the single 1669 * and range of the new label might be performed here. 1670 */ 1671 } 1672 1673 return (0); 1674} 1675 1676static int 1677lomac_cred_check_visible(struct ucred *cr1, struct ucred *cr2) 1678{ 1679 struct mac_lomac *subj, *obj; 1680 1681 if (!lomac_enabled) 1682 return (0); 1683 1684 subj = SLOT(cr1->cr_label); 1685 obj = SLOT(cr2->cr_label); 1686 1687 /* XXX: range */ 1688 if (!lomac_dominate_single(obj, subj)) 1689 return (ESRCH); 1690 1691 return (0); 1692} 1693 1694static int 1695lomac_ifnet_check_relabel(struct ucred *cred, struct ifnet *ifp, 1696 struct label *ifplabel, struct label *newlabel) 1697{ 1698 struct mac_lomac *subj, *new; 1699 int error; 1700 1701 subj = SLOT(cred->cr_label); 1702 new = SLOT(newlabel); 1703 1704 /* 1705 * If there is a LOMAC label update for the interface, it may be an 1706 * update of the single, range, or both. 1707 */ 1708 error = lomac_atmostflags(new, MAC_LOMAC_FLAGS_BOTH); 1709 if (error) 1710 return (error); 1711 1712 /* 1713 * Relabling network interfaces requires LOMAC privilege. 1714 */ 1715 error = lomac_subject_privileged(subj); 1716 if (error) 1717 return (error); 1718 1719 /* 1720 * If the LOMAC label is to be changed, authorize as appropriate. 1721 */ 1722 if (new->ml_flags & MAC_LOMAC_FLAGS_BOTH) { 1723 /* 1724 * Fill in the missing parts from the previous label. 1725 */ 1726 if ((new->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0) 1727 lomac_copy_single(subj, new); 1728 if ((new->ml_flags & MAC_LOMAC_FLAG_RANGE) == 0) 1729 lomac_copy_range(subj, new); 1730 1731 /* 1732 * Rely on the traditional superuser status for the LOMAC 1733 * interface relabel requirements. XXXMAC: This will go 1734 * away. 1735 * 1736 * XXXRW: This is also redundant to a higher layer check. 1737 */ 1738 error = priv_check_cred(cred, PRIV_NET_SETIFMAC, 0); 1739 if (error) 1740 return (EPERM); 1741 1742 /* 1743 * XXXMAC: Additional consistency tests regarding the single 1744 * and the range of the new label might be performed here. 1745 */ 1746 } 1747 1748 return (0); 1749} 1750 1751static int 1752lomac_ifnet_check_transmit(struct ifnet *ifp, struct label *ifplabel, 1753 struct mbuf *m, struct label *mlabel) 1754{ 1755 struct mac_lomac *p, *i; 1756 1757 if (!lomac_enabled) 1758 return (0); 1759 1760 p = SLOT(mlabel); 1761 i = SLOT(ifplabel); 1762 1763 return (lomac_single_in_range(p, i) ? 0 : EACCES); 1764} 1765 1766static int 1767lomac_inpcb_check_deliver(struct inpcb *inp, struct label *inplabel, 1768 struct mbuf *m, struct label *mlabel) 1769{ 1770 struct mac_lomac *p, *i; 1771 1772 if (!lomac_enabled) 1773 return (0); 1774 1775 p = SLOT(mlabel); 1776 i = SLOT(inplabel); 1777 1778 return (lomac_equal_single(p, i) ? 0 : EACCES); 1779} 1780 1781static int 1782lomac_kld_check_load(struct ucred *cred, struct vnode *vp, 1783 struct label *vplabel) 1784{ 1785 struct mac_lomac *subj, *obj; 1786 1787 if (!lomac_enabled) 1788 return (0); 1789 1790 subj = SLOT(cred->cr_label); 1791 obj = SLOT(vplabel); 1792 1793 if (lomac_subject_privileged(subj)) 1794 return (EPERM); 1795 1796 if (!lomac_high_single(obj)) 1797 return (EACCES); 1798 1799 return (0); 1800} 1801 1802static int 1803lomac_pipe_check_ioctl(struct ucred *cred, struct pipepair *pp, 1804 struct label *pplabel, unsigned long cmd, void /* caddr_t */ *data) 1805{ 1806 1807 if (!lomac_enabled) 1808 return (0); 1809 1810 /* XXX: This will be implemented soon... */ 1811 1812 return (0); 1813} 1814 1815static int 1816lomac_pipe_check_read(struct ucred *cred, struct pipepair *pp, 1817 struct label *pplabel) 1818{ 1819 struct mac_lomac *subj, *obj; 1820 1821 if (!lomac_enabled) 1822 return (0); 1823 1824 subj = SLOT(cred->cr_label); 1825 obj = SLOT(pplabel); 1826 1827 if (!lomac_dominate_single(obj, subj)) 1828 return (maybe_demote(subj, obj, "reading", "pipe", NULL)); 1829 1830 return (0); 1831} 1832 1833static int 1834lomac_pipe_check_relabel(struct ucred *cred, struct pipepair *pp, 1835 struct label *pplabel, struct label *newlabel) 1836{ 1837 struct mac_lomac *subj, *obj, *new; 1838 int error; 1839 1840 new = SLOT(newlabel); 1841 subj = SLOT(cred->cr_label); 1842 obj = SLOT(pplabel); 1843 1844 /* 1845 * If there is a LOMAC label update for a pipe, it must be a single 1846 * update. 1847 */ 1848 error = lomac_atmostflags(new, MAC_LOMAC_FLAG_SINGLE); 1849 if (error) 1850 return (error); 1851 1852 /* 1853 * To perform a relabel of a pipe (LOMAC label or not), LOMAC must 1854 * authorize the relabel. 1855 */ 1856 if (!lomac_single_in_range(obj, subj)) 1857 return (EPERM); 1858 1859 /* 1860 * If the LOMAC label is to be changed, authorize as appropriate. 1861 */ 1862 if (new->ml_flags & MAC_LOMAC_FLAG_SINGLE) { 1863 /* 1864 * To change the LOMAC label on a pipe, the new pipe label 1865 * must be in the subject range. 1866 */ 1867 if (!lomac_single_in_range(new, subj)) 1868 return (EPERM); 1869 1870 /* 1871 * To change the LOMAC label on a pipe to be EQUAL, the 1872 * subject must have appropriate privilege. 1873 */ 1874 if (lomac_contains_equal(new)) { 1875 error = lomac_subject_privileged(subj); 1876 if (error) 1877 return (error); 1878 } 1879 } 1880 1881 return (0); 1882} 1883 1884static int 1885lomac_pipe_check_write(struct ucred *cred, struct pipepair *pp, 1886 struct label *pplabel) 1887{ 1888 struct mac_lomac *subj, *obj; 1889 1890 if (!lomac_enabled) 1891 return (0); 1892 1893 subj = SLOT(cred->cr_label); 1894 obj = SLOT(pplabel); 1895 1896 if (!lomac_subject_dominate(subj, obj)) 1897 return (EACCES); 1898 1899 return (0); 1900} 1901 1902static int 1903lomac_proc_check_debug(struct ucred *cred, struct proc *p) 1904{ 1905 struct mac_lomac *subj, *obj; 1906 1907 if (!lomac_enabled) 1908 return (0); 1909 1910 subj = SLOT(cred->cr_label); 1911 obj = SLOT(p->p_ucred->cr_label); 1912 1913 /* XXX: range checks */ 1914 if (!lomac_dominate_single(obj, subj)) 1915 return (ESRCH); 1916 if (!lomac_subject_dominate(subj, obj)) 1917 return (EACCES); 1918 1919 return (0); 1920} 1921 1922static int 1923lomac_proc_check_sched(struct ucred *cred, struct proc *p) 1924{ 1925 struct mac_lomac *subj, *obj; 1926 1927 if (!lomac_enabled) 1928 return (0); 1929 1930 subj = SLOT(cred->cr_label); 1931 obj = SLOT(p->p_ucred->cr_label); 1932 1933 /* XXX: range checks */ 1934 if (!lomac_dominate_single(obj, subj)) 1935 return (ESRCH); 1936 if (!lomac_subject_dominate(subj, obj)) 1937 return (EACCES); 1938 1939 return (0); 1940} 1941 1942static int 1943lomac_proc_check_signal(struct ucred *cred, struct proc *p, int signum) 1944{ 1945 struct mac_lomac *subj, *obj; 1946 1947 if (!lomac_enabled) 1948 return (0); 1949 1950 subj = SLOT(cred->cr_label); 1951 obj = SLOT(p->p_ucred->cr_label); 1952 1953 /* XXX: range checks */ 1954 if (!lomac_dominate_single(obj, subj)) 1955 return (ESRCH); 1956 if (!lomac_subject_dominate(subj, obj)) 1957 return (EACCES); 1958 1959 return (0); 1960} 1961 1962static int 1963lomac_socket_check_deliver(struct socket *so, struct label *solabel, 1964 struct mbuf *m, struct label *mlabel) 1965{ 1966 struct mac_lomac *p, *s; 1967 1968 if (!lomac_enabled) 1969 return (0); 1970 1971 p = SLOT(mlabel); 1972 s = SLOT(solabel); 1973 1974 return (lomac_equal_single(p, s) ? 0 : EACCES); 1975} 1976 1977static int 1978lomac_socket_check_relabel(struct ucred *cred, struct socket *so, 1979 struct label *solabel, struct label *newlabel) 1980{ 1981 struct mac_lomac *subj, *obj, *new; 1982 int error; 1983 1984 new = SLOT(newlabel); 1985 subj = SLOT(cred->cr_label); 1986 obj = SLOT(solabel); 1987 1988 /* 1989 * If there is a LOMAC label update for the socket, it may be an 1990 * update of single. 1991 */ 1992 error = lomac_atmostflags(new, MAC_LOMAC_FLAG_SINGLE); 1993 if (error) 1994 return (error); 1995 1996 /* 1997 * To relabel a socket, the old socket single must be in the subject 1998 * range. 1999 */ 2000 if (!lomac_single_in_range(obj, subj)) 2001 return (EPERM); 2002 2003 /* 2004 * If the LOMAC label is to be changed, authorize as appropriate. 2005 */ 2006 if (new->ml_flags & MAC_LOMAC_FLAG_SINGLE) { 2007 /* 2008 * To relabel a socket, the new socket single must be in the 2009 * subject range. 2010 */ 2011 if (!lomac_single_in_range(new, subj)) 2012 return (EPERM); 2013 2014 /* 2015 * To change the LOMAC label on the socket to contain EQUAL, 2016 * the subject must have appropriate privilege. 2017 */ 2018 if (lomac_contains_equal(new)) { 2019 error = lomac_subject_privileged(subj); 2020 if (error) 2021 return (error); 2022 } 2023 } 2024 2025 return (0); 2026} 2027 2028static int 2029lomac_socket_check_visible(struct ucred *cred, struct socket *so, 2030 struct label *solabel) 2031{ 2032 struct mac_lomac *subj, *obj; 2033 2034 if (!lomac_enabled) 2035 return (0); 2036 2037 subj = SLOT(cred->cr_label); 2038 obj = SLOT(solabel); 2039 2040 if (!lomac_dominate_single(obj, subj)) 2041 return (ENOENT); 2042 2043 return (0); 2044} 2045 2046/* 2047 * Some system privileges are allowed regardless of integrity grade; others 2048 * are allowed only when running with privilege with respect to the LOMAC 2049 * policy as they might otherwise allow bypassing of the integrity policy. 2050 */ 2051static int 2052lomac_priv_check(struct ucred *cred, int priv) 2053{ 2054 struct mac_lomac *subj; 2055 int error; 2056 2057 if (!lomac_enabled) 2058 return (0); 2059 2060 /* 2061 * Exempt only specific privileges from the LOMAC integrity policy. 2062 */ 2063 switch (priv) { 2064 case PRIV_KTRACE: 2065 case PRIV_MSGBUF: 2066 2067 /* 2068 * Allow processes to manipulate basic process audit properties, and 2069 * to submit audit records. 2070 */ 2071 case PRIV_AUDIT_GETAUDIT: 2072 case PRIV_AUDIT_SETAUDIT: 2073 case PRIV_AUDIT_SUBMIT: 2074 2075 /* 2076 * Allow processes to manipulate their regular UNIX credentials. 2077 */ 2078 case PRIV_CRED_SETUID: 2079 case PRIV_CRED_SETEUID: 2080 case PRIV_CRED_SETGID: 2081 case PRIV_CRED_SETEGID: 2082 case PRIV_CRED_SETGROUPS: 2083 case PRIV_CRED_SETREUID: 2084 case PRIV_CRED_SETREGID: 2085 case PRIV_CRED_SETRESUID: 2086 case PRIV_CRED_SETRESGID: 2087 2088 /* 2089 * Allow processes to perform system monitoring. 2090 */ 2091 case PRIV_SEEOTHERGIDS: 2092 case PRIV_SEEOTHERUIDS: 2093 break; 2094 2095 /* 2096 * Allow access to general process debugging facilities. We 2097 * separately control debugging based on MAC label. 2098 */ 2099 case PRIV_DEBUG_DIFFCRED: 2100 case PRIV_DEBUG_SUGID: 2101 case PRIV_DEBUG_UNPRIV: 2102 2103 /* 2104 * Allow manipulating jails. 2105 */ 2106 case PRIV_JAIL_ATTACH: 2107 2108 /* 2109 * Allow privilege with respect to the Partition policy, but not the 2110 * Privs policy. 2111 */ 2112 case PRIV_MAC_PARTITION: 2113 2114 /* 2115 * Allow privilege with respect to process resource limits and login 2116 * context. 2117 */ 2118 case PRIV_PROC_LIMIT: 2119 case PRIV_PROC_SETLOGIN: 2120 case PRIV_PROC_SETRLIMIT: 2121 2122 /* 2123 * Allow System V and POSIX IPC privileges. 2124 */ 2125 case PRIV_IPC_READ: 2126 case PRIV_IPC_WRITE: 2127 case PRIV_IPC_ADMIN: 2128 case PRIV_IPC_MSGSIZE: 2129 case PRIV_MQ_ADMIN: 2130 2131 /* 2132 * Allow certain scheduler manipulations -- possibly this should be 2133 * controlled by more fine-grained policy, as potentially low 2134 * integrity processes can deny CPU to higher integrity ones. 2135 */ 2136 case PRIV_SCHED_DIFFCRED: 2137 case PRIV_SCHED_SETPRIORITY: 2138 case PRIV_SCHED_RTPRIO: 2139 case PRIV_SCHED_SETPOLICY: 2140 case PRIV_SCHED_SET: 2141 case PRIV_SCHED_SETPARAM: 2142 2143 /* 2144 * More IPC privileges. 2145 */ 2146 case PRIV_SEM_WRITE: 2147 2148 /* 2149 * Allow signaling privileges subject to integrity policy. 2150 */ 2151 case PRIV_SIGNAL_DIFFCRED: 2152 case PRIV_SIGNAL_SUGID: 2153 2154 /* 2155 * Allow access to only limited sysctls from lower integrity levels; 2156 * piggy-back on the Jail definition. 2157 */ 2158 case PRIV_SYSCTL_WRITEJAIL: 2159 2160 /* 2161 * Allow TTY-based privileges, subject to general device access using 2162 * labels on TTY device nodes, but not console privilege. 2163 */ 2164 case PRIV_TTY_DRAINWAIT: 2165 case PRIV_TTY_DTRWAIT: 2166 case PRIV_TTY_EXCLUSIVE: 2167 case PRIV_TTY_PRISON: 2168 case PRIV_TTY_STI: 2169 case PRIV_TTY_SETA: 2170 2171 /* 2172 * Grant most VFS privileges, as almost all are in practice bounded 2173 * by more specific checks using labels. 2174 */ 2175 case PRIV_VFS_READ: 2176 case PRIV_VFS_WRITE: 2177 case PRIV_VFS_ADMIN: 2178 case PRIV_VFS_EXEC: 2179 case PRIV_VFS_LOOKUP: 2180 case PRIV_VFS_CHFLAGS_DEV: 2181 case PRIV_VFS_CHOWN: 2182 case PRIV_VFS_CHROOT: 2183 case PRIV_VFS_RETAINSUGID: 2184 case PRIV_VFS_EXCEEDQUOTA: 2185 case PRIV_VFS_FCHROOT: 2186 case PRIV_VFS_FHOPEN: 2187 case PRIV_VFS_FHSTATFS: 2188 case PRIV_VFS_GENERATION: 2189 case PRIV_VFS_GETFH: 2190 case PRIV_VFS_GETQUOTA: 2191 case PRIV_VFS_LINK: 2192 case PRIV_VFS_MOUNT: 2193 case PRIV_VFS_MOUNT_OWNER: 2194 case PRIV_VFS_MOUNT_PERM: 2195 case PRIV_VFS_MOUNT_SUIDDIR: 2196 case PRIV_VFS_MOUNT_NONUSER: 2197 case PRIV_VFS_SETGID: 2198 case PRIV_VFS_STICKYFILE: 2199 case PRIV_VFS_SYSFLAGS: 2200 case PRIV_VFS_UNMOUNT: 2201 2202 /* 2203 * Allow VM privileges; it would be nice if these were subject to 2204 * resource limits. 2205 */ 2206 case PRIV_VM_MADV_PROTECT: 2207 case PRIV_VM_MLOCK: 2208 case PRIV_VM_MUNLOCK: 2209 2210 /* 2211 * Allow some but not all network privileges. In general, dont allow 2212 * reconfiguring the network stack, just normal use. 2213 */ 2214 case PRIV_NETATALK_RESERVEDPORT: 2215 case PRIV_NETINET_RESERVEDPORT: 2216 case PRIV_NETINET_RAW: 2217 case PRIV_NETINET_REUSEPORT: 2218 case PRIV_NETIPX_RESERVEDPORT: 2219 case PRIV_NETIPX_RAW: 2220 break; 2221 2222 /* 2223 * All remaining system privileges are allow only if the process 2224 * holds privilege with respect to the LOMAC policy. 2225 */ 2226 default: 2227 subj = SLOT(cred->cr_label); 2228 error = lomac_subject_privileged(subj); 2229 if (error) 2230 return (error); 2231 } 2232 return (0); 2233} 2234 2235 2236static int 2237lomac_system_check_acct(struct ucred *cred, struct vnode *vp, 2238 struct label *vplabel) 2239{ 2240 struct mac_lomac *subj, *obj; 2241 2242 if (!lomac_enabled) 2243 return (0); 2244 2245 subj = SLOT(cred->cr_label); 2246 obj = SLOT(vplabel); 2247 2248 if (lomac_subject_privileged(subj)) 2249 return (EPERM); 2250 2251 if (!lomac_high_single(obj)) 2252 return (EACCES); 2253 2254 return (0); 2255} 2256 2257static int 2258lomac_system_check_auditctl(struct ucred *cred, struct vnode *vp, 2259 struct label *vplabel) 2260{ 2261 struct mac_lomac *subj, *obj; 2262 2263 if (!lomac_enabled) 2264 return (0); 2265 2266 subj = SLOT(cred->cr_label); 2267 obj = SLOT(vplabel); 2268 2269 if (lomac_subject_privileged(subj)) 2270 return (EPERM); 2271 2272 if (!lomac_high_single(obj)) 2273 return (EACCES); 2274 2275 return (0); 2276} 2277 2278static int 2279lomac_system_check_swapoff(struct ucred *cred, struct vnode *vp, 2280 struct label *vplabel) 2281{ 2282 struct mac_lomac *subj; 2283 2284 if (!lomac_enabled) 2285 return (0); 2286 2287 subj = SLOT(cred->cr_label); 2288 2289 if (lomac_subject_privileged(subj)) 2290 return (EPERM); 2291 2292 return (0); 2293} 2294 2295static int 2296lomac_system_check_swapon(struct ucred *cred, struct vnode *vp, 2297 struct label *vplabel) 2298{ 2299 struct mac_lomac *subj, *obj; 2300 2301 if (!lomac_enabled) 2302 return (0); 2303 2304 subj = SLOT(cred->cr_label); 2305 obj = SLOT(vplabel); 2306 2307 if (lomac_subject_privileged(subj)) 2308 return (EPERM); 2309 2310 if (!lomac_high_single(obj)) 2311 return (EACCES); 2312 2313 return (0); 2314} 2315 2316static int 2317lomac_system_check_sysctl(struct ucred *cred, struct sysctl_oid *oidp, 2318 void *arg1, int arg2, struct sysctl_req *req) 2319{ 2320 struct mac_lomac *subj; 2321 2322 if (!lomac_enabled) 2323 return (0); 2324 2325 subj = SLOT(cred->cr_label); 2326 2327 /* 2328 * Treat sysctl variables without CTLFLAG_ANYBODY flag as lomac/high, 2329 * but also require privilege to change them. 2330 */ 2331 if (req->newptr != NULL && (oidp->oid_kind & CTLFLAG_ANYBODY) == 0) { 2332#ifdef notdef 2333 if (!lomac_subject_dominate_high(subj)) 2334 return (EACCES); 2335#endif 2336 2337 if (lomac_subject_privileged(subj)) 2338 return (EPERM); 2339 } 2340 2341 return (0); 2342} 2343 2344static int 2345lomac_vnode_check_create(struct ucred *cred, struct vnode *dvp, 2346 struct label *dvplabel, struct componentname *cnp, struct vattr *vap) 2347{ 2348 struct mac_lomac *subj, *obj; 2349 2350 if (!lomac_enabled) 2351 return (0); 2352 2353 subj = SLOT(cred->cr_label); 2354 obj = SLOT(dvplabel); 2355 2356 if (!lomac_subject_dominate(subj, obj)) 2357 return (EACCES); 2358 if (obj->ml_flags & MAC_LOMAC_FLAG_AUX && 2359 !lomac_dominate_element(&subj->ml_single, &obj->ml_auxsingle)) 2360 return (EACCES); 2361 2362 return (0); 2363} 2364 2365static int 2366lomac_vnode_check_deleteacl(struct ucred *cred, struct vnode *vp, 2367 struct label *vplabel, acl_type_t type) 2368{ 2369 struct mac_lomac *subj, *obj; 2370 2371 if (!lomac_enabled) 2372 return (0); 2373 2374 subj = SLOT(cred->cr_label); 2375 obj = SLOT(vplabel); 2376 2377 if (!lomac_subject_dominate(subj, obj)) 2378 return (EACCES); 2379 2380 return (0); 2381} 2382 2383static int 2384lomac_vnode_check_link(struct ucred *cred, struct vnode *dvp, 2385 struct label *dvplabel, struct vnode *vp, struct label *vplabel, 2386 struct componentname *cnp) 2387{ 2388 struct mac_lomac *subj, *obj; 2389 2390 if (!lomac_enabled) 2391 return (0); 2392 2393 subj = SLOT(cred->cr_label); 2394 obj = SLOT(dvplabel); 2395 2396 if (!lomac_subject_dominate(subj, obj)) 2397 return (EACCES); 2398 2399 obj = SLOT(vplabel); 2400 2401 if (!lomac_subject_dominate(subj, obj)) 2402 return (EACCES); 2403 2404 return (0); 2405} 2406 2407static int 2408lomac_vnode_check_mmap(struct ucred *cred, struct vnode *vp, 2409 struct label *vplabel, int prot, int flags) 2410{ 2411 struct mac_lomac *subj, *obj; 2412 2413 /* 2414 * Rely on the use of open()-time protections to handle 2415 * non-revocation cases. 2416 */ 2417 if (!lomac_enabled) 2418 return (0); 2419 2420 subj = SLOT(cred->cr_label); 2421 obj = SLOT(vplabel); 2422 2423 if (((prot & VM_PROT_WRITE) != 0) && ((flags & MAP_SHARED) != 0)) { 2424 if (!lomac_subject_dominate(subj, obj)) 2425 return (EACCES); 2426 } 2427 if (prot & (VM_PROT_READ | VM_PROT_EXECUTE)) { 2428 if (!lomac_dominate_single(obj, subj)) 2429 return (maybe_demote(subj, obj, "mapping", "file", vp)); 2430 } 2431 2432 return (0); 2433} 2434 2435static void 2436lomac_vnode_check_mmap_downgrade(struct ucred *cred, struct vnode *vp, 2437 struct label *vplabel, /* XXX vm_prot_t */ int *prot) 2438{ 2439 struct mac_lomac *subj, *obj; 2440 2441 /* 2442 * Rely on the use of open()-time protections to handle 2443 * non-revocation cases. 2444 */ 2445 if (!lomac_enabled || !revocation_enabled) 2446 return; 2447 2448 subj = SLOT(cred->cr_label); 2449 obj = SLOT(vplabel); 2450 2451 if (!lomac_subject_dominate(subj, obj)) 2452 *prot &= ~VM_PROT_WRITE; 2453} 2454 2455static int 2456lomac_vnode_check_open(struct ucred *cred, struct vnode *vp, 2457 struct label *vplabel, int acc_mode) 2458{ 2459 struct mac_lomac *subj, *obj; 2460 2461 if (!lomac_enabled) 2462 return (0); 2463 2464 subj = SLOT(cred->cr_label); 2465 obj = SLOT(vplabel); 2466 2467 /* XXX privilege override for admin? */ 2468 if (acc_mode & (VWRITE | VAPPEND | VADMIN)) { 2469 if (!lomac_subject_dominate(subj, obj)) 2470 return (EACCES); 2471 } 2472 2473 return (0); 2474} 2475 2476static int 2477lomac_vnode_check_read(struct ucred *active_cred, struct ucred *file_cred, 2478 struct vnode *vp, struct label *vplabel) 2479{ 2480 struct mac_lomac *subj, *obj; 2481 2482 if (!lomac_enabled || !revocation_enabled) 2483 return (0); 2484 2485 subj = SLOT(active_cred->cr_label); 2486 obj = SLOT(vplabel); 2487 2488 if (!lomac_dominate_single(obj, subj)) 2489 return (maybe_demote(subj, obj, "reading", "file", vp)); 2490 2491 return (0); 2492} 2493 2494static int 2495lomac_vnode_check_relabel(struct ucred *cred, struct vnode *vp, 2496 struct label *vplabel, struct label *newlabel) 2497{ 2498 struct mac_lomac *old, *new, *subj; 2499 int error; 2500 2501 old = SLOT(vplabel); 2502 new = SLOT(newlabel); 2503 subj = SLOT(cred->cr_label); 2504 2505 /* 2506 * If there is a LOMAC label update for the vnode, it must be a 2507 * single label, with an optional explicit auxiliary single. 2508 */ 2509 error = lomac_atmostflags(new, 2510 MAC_LOMAC_FLAG_SINGLE | MAC_LOMAC_FLAG_AUX); 2511 if (error) 2512 return (error); 2513 2514 /* 2515 * To perform a relabel of the vnode (LOMAC label or not), LOMAC must 2516 * authorize the relabel. 2517 */ 2518 if (!lomac_single_in_range(old, subj)) 2519 return (EPERM); 2520 2521 /* 2522 * If the LOMAC label is to be changed, authorize as appropriate. 2523 */ 2524 if (new->ml_flags & MAC_LOMAC_FLAG_SINGLE) { 2525 /* 2526 * To change the LOMAC label on a vnode, the new vnode label 2527 * must be in the subject range. 2528 */ 2529 if (!lomac_single_in_range(new, subj)) 2530 return (EPERM); 2531 2532 /* 2533 * To change the LOMAC label on the vnode to be EQUAL, the 2534 * subject must have appropriate privilege. 2535 */ 2536 if (lomac_contains_equal(new)) { 2537 error = lomac_subject_privileged(subj); 2538 if (error) 2539 return (error); 2540 } 2541 } 2542 if (new->ml_flags & MAC_LOMAC_FLAG_AUX) { 2543 /* 2544 * Fill in the missing parts from the previous label. 2545 */ 2546 if ((new->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0) 2547 lomac_copy_single(subj, new); 2548 2549 /* 2550 * To change the auxiliary LOMAC label on a vnode, the new 2551 * vnode label must be in the subject range. 2552 */ 2553 if (!lomac_auxsingle_in_range(new, subj)) 2554 return (EPERM); 2555 2556 /* 2557 * To change the auxiliary LOMAC label on the vnode to be 2558 * EQUAL, the subject must have appropriate privilege. 2559 */ 2560 if (lomac_contains_equal(new)) { 2561 error = lomac_subject_privileged(subj); 2562 if (error) 2563 return (error); 2564 } 2565 } 2566 2567 return (0); 2568} 2569 2570static int 2571lomac_vnode_check_rename_from(struct ucred *cred, struct vnode *dvp, 2572 struct label *dvplabel, struct vnode *vp, struct label *vplabel, 2573 struct componentname *cnp) 2574{ 2575 struct mac_lomac *subj, *obj; 2576 2577 if (!lomac_enabled) 2578 return (0); 2579 2580 subj = SLOT(cred->cr_label); 2581 obj = SLOT(dvplabel); 2582 2583 if (!lomac_subject_dominate(subj, obj)) 2584 return (EACCES); 2585 2586 obj = SLOT(vplabel); 2587 2588 if (!lomac_subject_dominate(subj, obj)) 2589 return (EACCES); 2590 2591 return (0); 2592} 2593 2594static int 2595lomac_vnode_check_rename_to(struct ucred *cred, struct vnode *dvp, 2596 struct label *dvplabel, struct vnode *vp, struct label *vplabel, 2597 int samedir, struct componentname *cnp) 2598{ 2599 struct mac_lomac *subj, *obj; 2600 2601 if (!lomac_enabled) 2602 return (0); 2603 2604 subj = SLOT(cred->cr_label); 2605 obj = SLOT(dvplabel); 2606 2607 if (!lomac_subject_dominate(subj, obj)) 2608 return (EACCES); 2609 2610 if (vp != NULL) { 2611 obj = SLOT(vplabel); 2612 2613 if (!lomac_subject_dominate(subj, obj)) 2614 return (EACCES); 2615 } 2616 2617 return (0); 2618} 2619 2620static int 2621lomac_vnode_check_revoke(struct ucred *cred, struct vnode *vp, 2622 struct label *vplabel) 2623{ 2624 struct mac_lomac *subj, *obj; 2625 2626 if (!lomac_enabled) 2627 return (0); 2628 2629 subj = SLOT(cred->cr_label); 2630 obj = SLOT(vplabel); 2631 2632 if (!lomac_subject_dominate(subj, obj)) 2633 return (EACCES); 2634 2635 return (0); 2636} 2637 2638static int 2639lomac_vnode_check_setacl(struct ucred *cred, struct vnode *vp, 2640 struct label *vplabel, acl_type_t type, struct acl *acl) 2641{ 2642 struct mac_lomac *subj, *obj; 2643 2644 if (!lomac_enabled) 2645 return (0); 2646 2647 subj = SLOT(cred->cr_label); 2648 obj = SLOT(vplabel); 2649 2650 if (!lomac_subject_dominate(subj, obj)) 2651 return (EACCES); 2652 2653 return (0); 2654} 2655 2656static int 2657lomac_vnode_check_setextattr(struct ucred *cred, struct vnode *vp, 2658 struct label *vplabel, int attrnamespace, const char *name, 2659 struct uio *uio) 2660{ 2661 struct mac_lomac *subj, *obj; 2662 2663 if (!lomac_enabled) 2664 return (0); 2665 2666 subj = SLOT(cred->cr_label); 2667 obj = SLOT(vplabel); 2668 2669 if (!lomac_subject_dominate(subj, obj)) 2670 return (EACCES); 2671 2672 /* XXX: protect the MAC EA in a special way? */ 2673 2674 return (0); 2675} 2676 2677static int 2678lomac_vnode_check_setflags(struct ucred *cred, struct vnode *vp, 2679 struct label *vplabel, u_long flags) 2680{ 2681 struct mac_lomac *subj, *obj; 2682 2683 if (!lomac_enabled) 2684 return (0); 2685 2686 subj = SLOT(cred->cr_label); 2687 obj = SLOT(vplabel); 2688 2689 if (!lomac_subject_dominate(subj, obj)) 2690 return (EACCES); 2691 2692 return (0); 2693} 2694 2695static int 2696lomac_vnode_check_setmode(struct ucred *cred, struct vnode *vp, 2697 struct label *vplabel, mode_t mode) 2698{ 2699 struct mac_lomac *subj, *obj; 2700 2701 if (!lomac_enabled) 2702 return (0); 2703 2704 subj = SLOT(cred->cr_label); 2705 obj = SLOT(vplabel); 2706 2707 if (!lomac_subject_dominate(subj, obj)) 2708 return (EACCES); 2709 2710 return (0); 2711} 2712 2713static int 2714lomac_vnode_check_setowner(struct ucred *cred, struct vnode *vp, 2715 struct label *vplabel, uid_t uid, gid_t gid) 2716{ 2717 struct mac_lomac *subj, *obj; 2718 2719 if (!lomac_enabled) 2720 return (0); 2721 2722 subj = SLOT(cred->cr_label); 2723 obj = SLOT(vplabel); 2724 2725 if (!lomac_subject_dominate(subj, obj)) 2726 return (EACCES); 2727 2728 return (0); 2729} 2730 2731static int 2732lomac_vnode_check_setutimes(struct ucred *cred, struct vnode *vp, 2733 struct label *vplabel, struct timespec atime, struct timespec mtime) 2734{ 2735 struct mac_lomac *subj, *obj; 2736 2737 if (!lomac_enabled) 2738 return (0); 2739 2740 subj = SLOT(cred->cr_label); 2741 obj = SLOT(vplabel); 2742 2743 if (!lomac_subject_dominate(subj, obj)) 2744 return (EACCES); 2745 2746 return (0); 2747} 2748 2749static int 2750lomac_vnode_check_unlink(struct ucred *cred, struct vnode *dvp, 2751 struct label *dvplabel, struct vnode *vp, struct label *vplabel, 2752 struct componentname *cnp) 2753{ 2754 struct mac_lomac *subj, *obj; 2755 2756 if (!lomac_enabled) 2757 return (0); 2758 2759 subj = SLOT(cred->cr_label); 2760 obj = SLOT(dvplabel); 2761 2762 if (!lomac_subject_dominate(subj, obj)) 2763 return (EACCES); 2764 2765 obj = SLOT(vplabel); 2766 2767 if (!lomac_subject_dominate(subj, obj)) 2768 return (EACCES); 2769 2770 return (0); 2771} 2772 2773static int 2774lomac_vnode_check_write(struct ucred *active_cred, 2775 struct ucred *file_cred, struct vnode *vp, struct label *vplabel) 2776{ 2777 struct mac_lomac *subj, *obj; 2778 2779 if (!lomac_enabled || !revocation_enabled) 2780 return (0); 2781 2782 subj = SLOT(active_cred->cr_label); 2783 obj = SLOT(vplabel); 2784 2785 if (!lomac_subject_dominate(subj, obj)) 2786 return (EACCES); 2787 2788 return (0); 2789} 2790 2791static void 2792lomac_thread_userret(struct thread *td) 2793{ 2794 struct proc *p = td->td_proc; 2795 struct mac_lomac_proc *subj = PSLOT(p->p_label); 2796 struct ucred *newcred, *oldcred; 2797 int dodrop; 2798 2799 mtx_lock(&subj->mtx); 2800 if (subj->mac_lomac.ml_flags & MAC_LOMAC_FLAG_UPDATE) { 2801 dodrop = 0; 2802 mtx_unlock(&subj->mtx); 2803 newcred = crget(); 2804 /* 2805 * Prevent a lock order reversal in 2806 * mac_cred_mmapped_drop_perms; ideally, the other user of 2807 * subj->mtx wouldn't be holding Giant. 2808 */ 2809 mtx_lock(&Giant); 2810 PROC_LOCK(p); 2811 mtx_lock(&subj->mtx); 2812 /* 2813 * Check if we lost the race while allocating the cred. 2814 */ 2815 if ((subj->mac_lomac.ml_flags & MAC_LOMAC_FLAG_UPDATE) == 0) { 2816 crfree(newcred); 2817 goto out; 2818 } 2819 oldcred = p->p_ucred; 2820 crcopy(newcred, oldcred); 2821 crhold(newcred); 2822 lomac_copy(&subj->mac_lomac, SLOT(newcred->cr_label)); 2823 p->p_ucred = newcred; 2824 crfree(oldcred); 2825 dodrop = 1; 2826 out: 2827 mtx_unlock(&subj->mtx); 2828 PROC_UNLOCK(p); 2829 if (dodrop) 2830 mac_cred_mmapped_drop_perms(curthread, newcred); 2831 mtx_unlock(&Giant); 2832 } else { 2833 mtx_unlock(&subj->mtx); 2834 } 2835} 2836 2837static struct mac_policy_ops lomac_ops = 2838{ 2839 .mpo_init = lomac_init, 2840 .mpo_bpfdesc_init_label = lomac_init_label, 2841 .mpo_cred_init_label = lomac_init_label, 2842 .mpo_devfs_init_label = lomac_init_label, 2843 .mpo_ifnet_init_label = lomac_init_label, 2844 .mpo_syncache_init_label = lomac_init_label_waitcheck, 2845 .mpo_inpcb_init_label = lomac_init_label_waitcheck, 2846 .mpo_ipq_init_label = lomac_init_label_waitcheck, 2847 .mpo_mbuf_init_label = lomac_init_label_waitcheck, 2848 .mpo_mount_init_label = lomac_init_label, 2849 .mpo_pipe_init_label = lomac_init_label, 2850 .mpo_proc_init_label = lomac_proc_init_label, 2851 .mpo_socket_init_label = lomac_init_label_waitcheck, 2852 .mpo_socketpeer_init_label = lomac_init_label_waitcheck, 2853 .mpo_vnode_init_label = lomac_init_label, 2854 .mpo_syncache_create = lomac_syncache_create, 2855 .mpo_bpfdesc_destroy_label = lomac_destroy_label, 2856 .mpo_cred_destroy_label = lomac_destroy_label, 2857 .mpo_devfs_destroy_label = lomac_destroy_label, 2858 .mpo_ifnet_destroy_label = lomac_destroy_label, 2859 .mpo_inpcb_destroy_label = lomac_destroy_label, 2860 .mpo_ipq_destroy_label = lomac_destroy_label, 2861 .mpo_mbuf_destroy_label = lomac_destroy_label, 2862 .mpo_mount_destroy_label = lomac_destroy_label, 2863 .mpo_pipe_destroy_label = lomac_destroy_label, 2864 .mpo_proc_destroy_label = lomac_proc_destroy_label, 2865 .mpo_syncache_destroy_label = lomac_destroy_label, 2866 .mpo_socket_destroy_label = lomac_destroy_label, 2867 .mpo_socketpeer_destroy_label = lomac_destroy_label, 2868 .mpo_vnode_destroy_label = lomac_destroy_label, 2869 .mpo_cred_copy_label = lomac_copy_label, 2870 .mpo_ifnet_copy_label = lomac_copy_label, 2871 .mpo_mbuf_copy_label = lomac_copy_label, 2872 .mpo_pipe_copy_label = lomac_copy_label, 2873 .mpo_socket_copy_label = lomac_copy_label, 2874 .mpo_vnode_copy_label = lomac_copy_label, 2875 .mpo_cred_externalize_label = lomac_externalize_label, 2876 .mpo_ifnet_externalize_label = lomac_externalize_label, 2877 .mpo_pipe_externalize_label = lomac_externalize_label, 2878 .mpo_socket_externalize_label = lomac_externalize_label, 2879 .mpo_socketpeer_externalize_label = lomac_externalize_label, 2880 .mpo_vnode_externalize_label = lomac_externalize_label, 2881 .mpo_cred_internalize_label = lomac_internalize_label, 2882 .mpo_ifnet_internalize_label = lomac_internalize_label, 2883 .mpo_pipe_internalize_label = lomac_internalize_label, 2884 .mpo_socket_internalize_label = lomac_internalize_label, 2885 .mpo_vnode_internalize_label = lomac_internalize_label, 2886 .mpo_devfs_create_device = lomac_devfs_create_device, 2887 .mpo_devfs_create_directory = lomac_devfs_create_directory, 2888 .mpo_devfs_create_symlink = lomac_devfs_create_symlink, 2889 .mpo_mount_create = lomac_mount_create, 2890 .mpo_vnode_relabel = lomac_vnode_relabel, 2891 .mpo_devfs_update = lomac_devfs_update, 2892 .mpo_devfs_vnode_associate = lomac_devfs_vnode_associate, 2893 .mpo_vnode_associate_extattr = lomac_vnode_associate_extattr, 2894 .mpo_vnode_associate_singlelabel = lomac_vnode_associate_singlelabel, 2895 .mpo_vnode_create_extattr = lomac_vnode_create_extattr, 2896 .mpo_vnode_setlabel_extattr = lomac_vnode_setlabel_extattr, 2897 .mpo_socket_create_mbuf = lomac_socket_create_mbuf, 2898 .mpo_syncache_create_mbuf = lomac_syncache_create_mbuf, 2899 .mpo_pipe_create = lomac_pipe_create, 2900 .mpo_socket_create = lomac_socket_create, 2901 .mpo_socket_newconn = lomac_socket_newconn, 2902 .mpo_pipe_relabel = lomac_pipe_relabel, 2903 .mpo_socket_relabel = lomac_socket_relabel, 2904 .mpo_socketpeer_set_from_mbuf = lomac_socketpeer_set_from_mbuf, 2905 .mpo_socketpeer_set_from_socket = lomac_socketpeer_set_from_socket, 2906 .mpo_bpfdesc_create = lomac_bpfdesc_create, 2907 .mpo_ipq_reassemble = lomac_ipq_reassemble, 2908 .mpo_netinet_fragment = lomac_netinet_fragment, 2909 .mpo_ifnet_create = lomac_ifnet_create, 2910 .mpo_inpcb_create = lomac_inpcb_create, 2911 .mpo_ipq_create = lomac_ipq_create, 2912 .mpo_inpcb_create_mbuf = lomac_inpcb_create_mbuf, 2913 .mpo_bpfdesc_create_mbuf = lomac_bpfdesc_create_mbuf, 2914 .mpo_ifnet_create_mbuf = lomac_ifnet_create_mbuf, 2915 .mpo_ipq_match = lomac_ipq_match, 2916 .mpo_ifnet_relabel = lomac_ifnet_relabel, 2917 .mpo_ipq_update = lomac_ipq_update, 2918 .mpo_inpcb_sosetlabel = lomac_inpcb_sosetlabel, 2919 .mpo_vnode_execve_transition = lomac_vnode_execve_transition, 2920 .mpo_vnode_execve_will_transition = 2921 lomac_vnode_execve_will_transition, 2922 .mpo_proc_create_swapper = lomac_proc_create_swapper, 2923 .mpo_proc_create_init = lomac_proc_create_init, 2924 .mpo_cred_relabel = lomac_cred_relabel, 2925 .mpo_bpfdesc_check_receive = lomac_bpfdesc_check_receive, 2926 .mpo_cred_check_relabel = lomac_cred_check_relabel, 2927 .mpo_cred_check_visible = lomac_cred_check_visible, 2928 .mpo_ifnet_check_relabel = lomac_ifnet_check_relabel, 2929 .mpo_ifnet_check_transmit = lomac_ifnet_check_transmit, 2930 .mpo_inpcb_check_deliver = lomac_inpcb_check_deliver, 2931 .mpo_kld_check_load = lomac_kld_check_load, 2932 .mpo_pipe_check_ioctl = lomac_pipe_check_ioctl, 2933 .mpo_pipe_check_read = lomac_pipe_check_read, 2934 .mpo_pipe_check_relabel = lomac_pipe_check_relabel, 2935 .mpo_pipe_check_write = lomac_pipe_check_write, 2936 .mpo_proc_check_debug = lomac_proc_check_debug, 2937 .mpo_proc_check_sched = lomac_proc_check_sched, 2938 .mpo_proc_check_signal = lomac_proc_check_signal, 2939 .mpo_socket_check_deliver = lomac_socket_check_deliver, 2940 .mpo_socket_check_relabel = lomac_socket_check_relabel, 2941 .mpo_socket_check_visible = lomac_socket_check_visible, 2942 .mpo_system_check_acct = lomac_system_check_acct, 2943 .mpo_system_check_auditctl = lomac_system_check_auditctl, 2944 .mpo_system_check_swapoff = lomac_system_check_swapoff, 2945 .mpo_system_check_swapon = lomac_system_check_swapon, 2946 .mpo_system_check_sysctl = lomac_system_check_sysctl, 2947 .mpo_vnode_check_access = lomac_vnode_check_open, 2948 .mpo_vnode_check_create = lomac_vnode_check_create, 2949 .mpo_vnode_check_deleteacl = lomac_vnode_check_deleteacl, 2950 .mpo_vnode_check_link = lomac_vnode_check_link, 2951 .mpo_vnode_check_mmap = lomac_vnode_check_mmap, 2952 .mpo_vnode_check_mmap_downgrade = lomac_vnode_check_mmap_downgrade, 2953 .mpo_vnode_check_open = lomac_vnode_check_open, 2954 .mpo_vnode_check_read = lomac_vnode_check_read, 2955 .mpo_vnode_check_relabel = lomac_vnode_check_relabel, 2956 .mpo_vnode_check_rename_from = lomac_vnode_check_rename_from, 2957 .mpo_vnode_check_rename_to = lomac_vnode_check_rename_to, 2958 .mpo_vnode_check_revoke = lomac_vnode_check_revoke, 2959 .mpo_vnode_check_setacl = lomac_vnode_check_setacl, 2960 .mpo_vnode_check_setextattr = lomac_vnode_check_setextattr, 2961 .mpo_vnode_check_setflags = lomac_vnode_check_setflags, 2962 .mpo_vnode_check_setmode = lomac_vnode_check_setmode, 2963 .mpo_vnode_check_setowner = lomac_vnode_check_setowner, 2964 .mpo_vnode_check_setutimes = lomac_vnode_check_setutimes, 2965 .mpo_vnode_check_unlink = lomac_vnode_check_unlink, 2966 .mpo_vnode_check_write = lomac_vnode_check_write, 2967 .mpo_thread_userret = lomac_thread_userret, 2968 .mpo_netatalk_aarp_send = lomac_netatalk_aarp_send, 2969 .mpo_netinet_arp_send = lomac_netinet_arp_send, 2970 .mpo_netinet_firewall_reply = lomac_netinet_firewall_reply, 2971 .mpo_netinet_firewall_send = lomac_netinet_firewall_send, 2972 .mpo_netinet_icmp_reply = lomac_netinet_icmp_reply, 2973 .mpo_netinet_igmp_send = lomac_netinet_igmp_send, 2974 .mpo_netinet6_nd6_send = lomac_netinet6_nd6_send, 2975 .mpo_priv_check = lomac_priv_check, 2976}; 2977 2978MAC_POLICY_SET(&lomac_ops, mac_lomac, "TrustedBSD MAC/LOMAC", 2979 MPC_LOADTIME_FLAG_NOTLATE | MPC_LOADTIME_FLAG_LABELMBUFS, &lomac_slot); 2980