mac_lomac.c revision 173138
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 173138 2007-10-29 13:33:06Z 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_destroy_label(struct label *label) 635{ 636 637 lomac_free(SLOT(label)); 638 SLOT_SET(label, NULL); 639} 640 641static int 642lomac_element_to_string(struct sbuf *sb, struct mac_lomac_element *element) 643{ 644 645 switch (element->mle_type) { 646 case MAC_LOMAC_TYPE_HIGH: 647 return (sbuf_printf(sb, "high")); 648 649 case MAC_LOMAC_TYPE_LOW: 650 return (sbuf_printf(sb, "low")); 651 652 case MAC_LOMAC_TYPE_EQUAL: 653 return (sbuf_printf(sb, "equal")); 654 655 case MAC_LOMAC_TYPE_GRADE: 656 return (sbuf_printf(sb, "%d", element->mle_grade)); 657 658 default: 659 panic("lomac_element_to_string: invalid type (%d)", 660 element->mle_type); 661 } 662} 663 664static int 665lomac_to_string(struct sbuf *sb, struct mac_lomac *ml) 666{ 667 668 if (ml->ml_flags & MAC_LOMAC_FLAG_SINGLE) { 669 if (lomac_element_to_string(sb, &ml->ml_single) == -1) 670 return (EINVAL); 671 } 672 673 if (ml->ml_flags & MAC_LOMAC_FLAG_AUX) { 674 if (sbuf_putc(sb, '[') == -1) 675 return (EINVAL); 676 677 if (lomac_element_to_string(sb, &ml->ml_auxsingle) == -1) 678 return (EINVAL); 679 680 if (sbuf_putc(sb, ']') == -1) 681 return (EINVAL); 682 } 683 684 if (ml->ml_flags & MAC_LOMAC_FLAG_RANGE) { 685 if (sbuf_putc(sb, '(') == -1) 686 return (EINVAL); 687 688 if (lomac_element_to_string(sb, &ml->ml_rangelow) == -1) 689 return (EINVAL); 690 691 if (sbuf_putc(sb, '-') == -1) 692 return (EINVAL); 693 694 if (lomac_element_to_string(sb, &ml->ml_rangehigh) == -1) 695 return (EINVAL); 696 697 if (sbuf_putc(sb, ')') == -1) 698 return (EINVAL); 699 } 700 701 return (0); 702} 703 704static int 705lomac_externalize_label(struct label *label, char *element_name, 706 struct sbuf *sb, int *claimed) 707{ 708 struct mac_lomac *ml; 709 710 if (strcmp(MAC_LOMAC_LABEL_NAME, element_name) != 0) 711 return (0); 712 713 (*claimed)++; 714 715 ml = SLOT(label); 716 717 return (lomac_to_string(sb, ml)); 718} 719 720static int 721lomac_parse_element(struct mac_lomac_element *element, char *string) 722{ 723 724 if (strcmp(string, "high") == 0 || strcmp(string, "hi") == 0) { 725 element->mle_type = MAC_LOMAC_TYPE_HIGH; 726 element->mle_grade = MAC_LOMAC_TYPE_UNDEF; 727 } else if (strcmp(string, "low") == 0 || strcmp(string, "lo") == 0) { 728 element->mle_type = MAC_LOMAC_TYPE_LOW; 729 element->mle_grade = MAC_LOMAC_TYPE_UNDEF; 730 } else if (strcmp(string, "equal") == 0 || strcmp(string, "eq") == 0) 731 { 732 element->mle_type = MAC_LOMAC_TYPE_EQUAL; 733 element->mle_grade = MAC_LOMAC_TYPE_UNDEF; 734 } else { 735 char *p0, *p1; 736 int d; 737 738 p0 = string; 739 d = strtol(p0, &p1, 10); 740 741 if (d < 0 || d > 65535) 742 return (EINVAL); 743 element->mle_type = MAC_LOMAC_TYPE_GRADE; 744 element->mle_grade = d; 745 746 if (p1 == p0 || *p1 != '\0') 747 return (EINVAL); 748 } 749 750 return (0); 751} 752 753/* 754 * Note: destructively consumes the string, make a local copy before calling 755 * if that's a problem. 756 */ 757static int 758lomac_parse(struct mac_lomac *ml, char *string) 759{ 760 char *range, *rangeend, *rangehigh, *rangelow, *single, *auxsingle, 761 *auxsingleend; 762 int error; 763 764 /* Do we have a range? */ 765 single = string; 766 range = index(string, '('); 767 if (range == single) 768 single = NULL; 769 auxsingle = index(string, '['); 770 if (auxsingle == single) 771 single = NULL; 772 if (range != NULL && auxsingle != NULL) 773 return (EINVAL); 774 rangelow = rangehigh = NULL; 775 if (range != NULL) { 776 /* Nul terminate the end of the single string. */ 777 *range = '\0'; 778 range++; 779 rangelow = range; 780 rangehigh = index(rangelow, '-'); 781 if (rangehigh == NULL) 782 return (EINVAL); 783 rangehigh++; 784 if (*rangelow == '\0' || *rangehigh == '\0') 785 return (EINVAL); 786 rangeend = index(rangehigh, ')'); 787 if (rangeend == NULL) 788 return (EINVAL); 789 if (*(rangeend + 1) != '\0') 790 return (EINVAL); 791 /* Nul terminate the ends of the ranges. */ 792 *(rangehigh - 1) = '\0'; 793 *rangeend = '\0'; 794 } 795 KASSERT((rangelow != NULL && rangehigh != NULL) || 796 (rangelow == NULL && rangehigh == NULL), 797 ("lomac_internalize_label: range mismatch")); 798 if (auxsingle != NULL) { 799 /* Nul terminate the end of the single string. */ 800 *auxsingle = '\0'; 801 auxsingle++; 802 auxsingleend = index(auxsingle, ']'); 803 if (auxsingleend == NULL) 804 return (EINVAL); 805 if (*(auxsingleend + 1) != '\0') 806 return (EINVAL); 807 /* Nul terminate the end of the auxsingle. */ 808 *auxsingleend = '\0'; 809 } 810 811 bzero(ml, sizeof(*ml)); 812 if (single != NULL) { 813 error = lomac_parse_element(&ml->ml_single, single); 814 if (error) 815 return (error); 816 ml->ml_flags |= MAC_LOMAC_FLAG_SINGLE; 817 } 818 819 if (auxsingle != NULL) { 820 error = lomac_parse_element(&ml->ml_auxsingle, 821 auxsingle); 822 if (error) 823 return (error); 824 ml->ml_flags |= MAC_LOMAC_FLAG_AUX; 825 } 826 827 if (rangelow != NULL) { 828 error = lomac_parse_element(&ml->ml_rangelow, rangelow); 829 if (error) 830 return (error); 831 error = lomac_parse_element(&ml->ml_rangehigh, rangehigh); 832 if (error) 833 return (error); 834 ml->ml_flags |= MAC_LOMAC_FLAG_RANGE; 835 } 836 837 error = lomac_valid(ml); 838 if (error) 839 return (error); 840 841 return (0); 842} 843 844static int 845lomac_internalize_label(struct label *label, char *element_name, 846 char *element_data, int *claimed) 847{ 848 struct mac_lomac *ml, ml_temp; 849 int error; 850 851 if (strcmp(MAC_LOMAC_LABEL_NAME, element_name) != 0) 852 return (0); 853 854 (*claimed)++; 855 856 error = lomac_parse(&ml_temp, element_data); 857 if (error) 858 return (error); 859 860 ml = SLOT(label); 861 *ml = ml_temp; 862 863 return (0); 864} 865 866static void 867lomac_copy_label(struct label *src, struct label *dest) 868{ 869 870 *SLOT(dest) = *SLOT(src); 871} 872 873/* 874 * Object-specific entry point implementations are sorted alphabetically by 875 * object type name and then by operation. 876 */ 877static int 878lomac_bpfdesc_check_receive(struct bpf_d *d, struct label *dlabel, 879 struct ifnet *ifp, struct label *ifplabel) 880{ 881 struct mac_lomac *a, *b; 882 883 if (!lomac_enabled) 884 return (0); 885 886 a = SLOT(dlabel); 887 b = SLOT(ifplabel); 888 889 if (lomac_equal_single(a, b)) 890 return (0); 891 return (EACCES); 892} 893 894static void 895lomac_bpfdesc_create(struct ucred *cred, struct bpf_d *d, 896 struct label *dlabel) 897{ 898 struct mac_lomac *source, *dest; 899 900 source = SLOT(cred->cr_label); 901 dest = SLOT(dlabel); 902 903 lomac_copy_single(source, dest); 904} 905 906static void 907lomac_bpfdesc_create_mbuf(struct bpf_d *d, struct label *dlabel, 908 struct mbuf *m, struct label *mlabel) 909{ 910 struct mac_lomac *source, *dest; 911 912 source = SLOT(dlabel); 913 dest = SLOT(mlabel); 914 915 lomac_copy_single(source, dest); 916} 917 918static int 919lomac_cred_check_relabel(struct ucred *cred, struct label *newlabel) 920{ 921 struct mac_lomac *subj, *new; 922 int error; 923 924 subj = SLOT(cred->cr_label); 925 new = SLOT(newlabel); 926 927 /* 928 * If there is a LOMAC label update for the credential, it may be an 929 * update of the single, range, or both. 930 */ 931 error = lomac_atmostflags(new, MAC_LOMAC_FLAGS_BOTH); 932 if (error) 933 return (error); 934 935 /* 936 * If the LOMAC label is to be changed, authorize as appropriate. 937 */ 938 if (new->ml_flags & MAC_LOMAC_FLAGS_BOTH) { 939 /* 940 * Fill in the missing parts from the previous label. 941 */ 942 if ((new->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0) 943 lomac_copy_single(subj, new); 944 if ((new->ml_flags & MAC_LOMAC_FLAG_RANGE) == 0) 945 lomac_copy_range(subj, new); 946 947 /* 948 * To change the LOMAC range on a credential, the new range 949 * label must be in the current range. 950 */ 951 if (!lomac_range_in_range(new, subj)) 952 return (EPERM); 953 954 /* 955 * To change the LOMAC single label on a credential, the new 956 * single label must be in the new range. Implicitly from 957 * the previous check, the new single is in the old range. 958 */ 959 if (!lomac_single_in_range(new, new)) 960 return (EPERM); 961 962 /* 963 * To have EQUAL in any component of the new credential LOMAC 964 * label, the subject must already have EQUAL in their label. 965 */ 966 if (lomac_contains_equal(new)) { 967 error = lomac_subject_privileged(subj); 968 if (error) 969 return (error); 970 } 971 972 /* 973 * XXXMAC: Additional consistency tests regarding the single 974 * and range of the new label might be performed here. 975 */ 976 } 977 978 return (0); 979} 980 981static int 982lomac_cred_check_visible(struct ucred *cr1, struct ucred *cr2) 983{ 984 struct mac_lomac *subj, *obj; 985 986 if (!lomac_enabled) 987 return (0); 988 989 subj = SLOT(cr1->cr_label); 990 obj = SLOT(cr2->cr_label); 991 992 /* XXX: range */ 993 if (!lomac_dominate_single(obj, subj)) 994 return (ESRCH); 995 996 return (0); 997} 998static void 999lomac_cred_relabel(struct ucred *cred, struct label *newlabel) 1000{ 1001 struct mac_lomac *source, *dest; 1002 1003 source = SLOT(newlabel); 1004 dest = SLOT(cred->cr_label); 1005 1006 try_relabel(source, dest); 1007} 1008 1009static void 1010lomac_devfs_create_device(struct ucred *cred, struct mount *mp, 1011 struct cdev *dev, struct devfs_dirent *de, struct label *delabel) 1012{ 1013 struct mac_lomac *ml; 1014 int lomac_type; 1015 1016 ml = SLOT(delabel); 1017 if (strcmp(dev->si_name, "null") == 0 || 1018 strcmp(dev->si_name, "zero") == 0 || 1019 strcmp(dev->si_name, "random") == 0 || 1020 strncmp(dev->si_name, "fd/", strlen("fd/")) == 0 || 1021 strncmp(dev->si_name, "ttyv", strlen("ttyv")) == 0) 1022 lomac_type = MAC_LOMAC_TYPE_EQUAL; 1023 else if (ptys_equal && 1024 (strncmp(dev->si_name, "ttyp", strlen("ttyp")) == 0 || 1025 strncmp(dev->si_name, "ptyp", strlen("ptyp")) == 0)) 1026 lomac_type = MAC_LOMAC_TYPE_EQUAL; 1027 else 1028 lomac_type = MAC_LOMAC_TYPE_HIGH; 1029 lomac_set_single(ml, lomac_type, 0); 1030} 1031 1032static void 1033lomac_devfs_create_directory(struct mount *mp, char *dirname, int dirnamelen, 1034 struct devfs_dirent *de, struct label *delabel) 1035{ 1036 struct mac_lomac *ml; 1037 1038 ml = SLOT(delabel); 1039 lomac_set_single(ml, MAC_LOMAC_TYPE_HIGH, 0); 1040} 1041 1042static void 1043lomac_devfs_create_symlink(struct ucred *cred, struct mount *mp, 1044 struct devfs_dirent *dd, struct label *ddlabel, struct devfs_dirent *de, 1045 struct label *delabel) 1046{ 1047 struct mac_lomac *source, *dest; 1048 1049 source = SLOT(cred->cr_label); 1050 dest = SLOT(delabel); 1051 1052 lomac_copy_single(source, dest); 1053} 1054 1055static void 1056lomac_devfs_update(struct mount *mp, struct devfs_dirent *de, 1057 struct label *delabel, struct vnode *vp, struct label *vplabel) 1058{ 1059 struct mac_lomac *source, *dest; 1060 1061 source = SLOT(vplabel); 1062 dest = SLOT(delabel); 1063 1064 lomac_copy(source, dest); 1065} 1066 1067static void 1068lomac_devfs_vnode_associate(struct mount *mp, struct label *mplabel, 1069 struct devfs_dirent *de, struct label *delabel, struct vnode *vp, 1070 struct label *vplabel) 1071{ 1072 struct mac_lomac *source, *dest; 1073 1074 source = SLOT(delabel); 1075 dest = SLOT(vplabel); 1076 1077 lomac_copy_single(source, dest); 1078} 1079 1080static int 1081lomac_ifnet_check_relabel(struct ucred *cred, struct ifnet *ifp, 1082 struct label *ifplabel, struct label *newlabel) 1083{ 1084 struct mac_lomac *subj, *new; 1085 int error; 1086 1087 subj = SLOT(cred->cr_label); 1088 new = SLOT(newlabel); 1089 1090 /* 1091 * If there is a LOMAC label update for the interface, it may be an 1092 * update of the single, range, or both. 1093 */ 1094 error = lomac_atmostflags(new, MAC_LOMAC_FLAGS_BOTH); 1095 if (error) 1096 return (error); 1097 1098 /* 1099 * Relabling network interfaces requires LOMAC privilege. 1100 */ 1101 error = lomac_subject_privileged(subj); 1102 if (error) 1103 return (error); 1104 1105 /* 1106 * If the LOMAC label is to be changed, authorize as appropriate. 1107 */ 1108 if (new->ml_flags & MAC_LOMAC_FLAGS_BOTH) { 1109 /* 1110 * Fill in the missing parts from the previous label. 1111 */ 1112 if ((new->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0) 1113 lomac_copy_single(subj, new); 1114 if ((new->ml_flags & MAC_LOMAC_FLAG_RANGE) == 0) 1115 lomac_copy_range(subj, new); 1116 1117 /* 1118 * Rely on the traditional superuser status for the LOMAC 1119 * interface relabel requirements. XXXMAC: This will go 1120 * away. 1121 * 1122 * XXXRW: This is also redundant to a higher layer check. 1123 */ 1124 error = priv_check_cred(cred, PRIV_NET_SETIFMAC, 0); 1125 if (error) 1126 return (EPERM); 1127 1128 /* 1129 * XXXMAC: Additional consistency tests regarding the single 1130 * and the range of the new label might be performed here. 1131 */ 1132 } 1133 1134 return (0); 1135} 1136 1137static int 1138lomac_ifnet_check_transmit(struct ifnet *ifp, struct label *ifplabel, 1139 struct mbuf *m, struct label *mlabel) 1140{ 1141 struct mac_lomac *p, *i; 1142 1143 if (!lomac_enabled) 1144 return (0); 1145 1146 p = SLOT(mlabel); 1147 i = SLOT(ifplabel); 1148 1149 return (lomac_single_in_range(p, i) ? 0 : EACCES); 1150} 1151 1152static void 1153lomac_ifnet_create(struct ifnet *ifp, struct label *ifplabel) 1154{ 1155 char tifname[IFNAMSIZ], *p, *q; 1156 char tiflist[sizeof(trusted_interfaces)]; 1157 struct mac_lomac *dest; 1158 int len, grade; 1159 1160 dest = SLOT(ifplabel); 1161 1162 if (ifp->if_type == IFT_LOOP) { 1163 grade = MAC_LOMAC_TYPE_EQUAL; 1164 goto set; 1165 } 1166 1167 if (trust_all_interfaces) { 1168 grade = MAC_LOMAC_TYPE_HIGH; 1169 goto set; 1170 } 1171 1172 grade = MAC_LOMAC_TYPE_LOW; 1173 1174 if (trusted_interfaces[0] == '\0' || 1175 !strvalid(trusted_interfaces, sizeof(trusted_interfaces))) 1176 goto set; 1177 1178 bzero(tiflist, sizeof(tiflist)); 1179 for (p = trusted_interfaces, q = tiflist; *p != '\0'; p++, q++) 1180 if(*p != ' ' && *p != '\t') 1181 *q = *p; 1182 1183 for (p = q = tiflist;; p++) { 1184 if (*p == ',' || *p == '\0') { 1185 len = p - q; 1186 if (len < IFNAMSIZ) { 1187 bzero(tifname, sizeof(tifname)); 1188 bcopy(q, tifname, len); 1189 if (strcmp(tifname, ifp->if_xname) == 0) { 1190 grade = MAC_LOMAC_TYPE_HIGH; 1191 break; 1192 } 1193 } 1194 else { 1195 *p = '\0'; 1196 printf("MAC/LOMAC warning: interface name " 1197 "\"%s\" is too long (must be < %d)\n", 1198 q, IFNAMSIZ); 1199 } 1200 if (*p == '\0') 1201 break; 1202 q = p + 1; 1203 } 1204 } 1205set: 1206 lomac_set_single(dest, grade, 0); 1207 lomac_set_range(dest, grade, 0, grade, 0); 1208} 1209 1210static void 1211lomac_ifnet_create_mbuf(struct ifnet *ifp, struct label *ifplabel, 1212 struct mbuf *m, struct label *mlabel) 1213{ 1214 struct mac_lomac *source, *dest; 1215 1216 source = SLOT(ifplabel); 1217 dest = SLOT(mlabel); 1218 1219 lomac_copy_single(source, dest); 1220} 1221 1222static void 1223lomac_ifnet_relabel(struct ucred *cred, struct ifnet *ifp, 1224 struct label *ifplabel, struct label *newlabel) 1225{ 1226 struct mac_lomac *source, *dest; 1227 1228 source = SLOT(newlabel); 1229 dest = SLOT(ifplabel); 1230 1231 try_relabel(source, dest); 1232} 1233 1234static int 1235lomac_inpcb_check_deliver(struct inpcb *inp, struct label *inplabel, 1236 struct mbuf *m, struct label *mlabel) 1237{ 1238 struct mac_lomac *p, *i; 1239 1240 if (!lomac_enabled) 1241 return (0); 1242 1243 p = SLOT(mlabel); 1244 i = SLOT(inplabel); 1245 1246 return (lomac_equal_single(p, i) ? 0 : EACCES); 1247} 1248 1249static void 1250lomac_inpcb_create(struct socket *so, struct label *solabel, 1251 struct inpcb *inp, struct label *inplabel) 1252{ 1253 struct mac_lomac *source, *dest; 1254 1255 source = SLOT(solabel); 1256 dest = SLOT(inplabel); 1257 1258 lomac_copy_single(source, dest); 1259} 1260 1261static void 1262lomac_inpcb_create_mbuf(struct inpcb *inp, struct label *inplabel, 1263 struct mbuf *m, struct label *mlabel) 1264{ 1265 struct mac_lomac *source, *dest; 1266 1267 source = SLOT(inplabel); 1268 dest = SLOT(mlabel); 1269 1270 lomac_copy_single(source, dest); 1271} 1272 1273static void 1274lomac_inpcb_sosetlabel(struct socket *so, struct label *solabel, 1275 struct inpcb *inp, struct label *inplabel) 1276{ 1277 struct mac_lomac *source, *dest; 1278 1279 source = SLOT(solabel); 1280 dest = SLOT(inplabel); 1281 1282 lomac_copy_single(source, dest); 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 int 1298lomac_ipq_match(struct mbuf *m, struct label *mlabel, struct ipq *ipq, 1299 struct label *ipqlabel) 1300{ 1301 struct mac_lomac *a, *b; 1302 1303 a = SLOT(ipqlabel); 1304 b = SLOT(mlabel); 1305 1306 return (lomac_equal_single(a, b)); 1307} 1308 1309static void 1310lomac_ipq_reassemble(struct ipq *ipq, struct label *ipqlabel, 1311 struct mbuf *m, struct label *mlabel) 1312{ 1313 struct mac_lomac *source, *dest; 1314 1315 source = SLOT(ipqlabel); 1316 dest = SLOT(mlabel); 1317 1318 /* Just use the head, since we require them all to match. */ 1319 lomac_copy_single(source, dest); 1320} 1321 1322static void 1323lomac_ipq_update(struct mbuf *m, struct label *mlabel, struct ipq *ipq, 1324 struct label *ipqlabel) 1325{ 1326 1327 /* NOOP: we only accept matching labels, so no need to update */ 1328} 1329 1330static int 1331lomac_kld_check_load(struct ucred *cred, struct vnode *vp, 1332 struct label *vplabel) 1333{ 1334 struct mac_lomac *subj, *obj; 1335 1336 if (!lomac_enabled) 1337 return (0); 1338 1339 subj = SLOT(cred->cr_label); 1340 obj = SLOT(vplabel); 1341 1342 if (lomac_subject_privileged(subj)) 1343 return (EPERM); 1344 1345 if (!lomac_high_single(obj)) 1346 return (EACCES); 1347 1348 return (0); 1349} 1350 1351static void 1352lomac_mount_create(struct ucred *cred, struct mount *mp, 1353 struct label *mplabel) 1354{ 1355 struct mac_lomac *source, *dest; 1356 1357 source = SLOT(cred->cr_label); 1358 dest = SLOT(mplabel); 1359 lomac_copy_single(source, dest); 1360} 1361 1362static void 1363lomac_netatalk_aarp_send(struct ifnet *ifp, struct label *ifplabel, 1364 struct mbuf *m, struct label *mlabel) 1365{ 1366 struct mac_lomac *dest; 1367 1368 dest = SLOT(mlabel); 1369 1370 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0); 1371} 1372 1373static void 1374lomac_netinet_arp_send(struct ifnet *ifp, struct label *ifplabel, 1375 struct mbuf *m, struct label *mlabel) 1376{ 1377 struct mac_lomac *dest; 1378 1379 dest = SLOT(mlabel); 1380 1381 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0); 1382} 1383 1384static void 1385lomac_netinet_firewall_reply(struct mbuf *mrecv, struct label *mrecvlabel, 1386 struct mbuf *msend, struct label *msendlabel) 1387{ 1388 struct mac_lomac *source, *dest; 1389 1390 source = SLOT(mrecvlabel); 1391 dest = SLOT(msendlabel); 1392 1393 lomac_copy_single(source, dest); 1394} 1395 1396static void 1397lomac_netinet_firewall_send(struct mbuf *m, struct label *mlabel) 1398{ 1399 struct mac_lomac *dest; 1400 1401 dest = SLOT(mlabel); 1402 1403 /* XXX: where is the label for the firewall really comming from? */ 1404 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0); 1405} 1406 1407static void 1408lomac_netinet_fragment(struct mbuf *m, struct label *mlabel, 1409 struct mbuf *frag, struct label *fraglabel) 1410{ 1411 struct mac_lomac *source, *dest; 1412 1413 source = SLOT(mlabel); 1414 dest = SLOT(fraglabel); 1415 1416 lomac_copy_single(source, dest); 1417} 1418 1419static void 1420lomac_netinet_icmp_reply(struct mbuf *mrecv, struct label *mrecvlabel, 1421 struct mbuf *msend, struct label *msendlabel) 1422{ 1423 struct mac_lomac *source, *dest; 1424 1425 source = SLOT(mrecvlabel); 1426 dest = SLOT(msendlabel); 1427 1428 lomac_copy_single(source, dest); 1429} 1430 1431static void 1432lomac_netinet_igmp_send(struct ifnet *ifp, struct label *ifplabel, 1433 struct mbuf *m, struct label *mlabel) 1434{ 1435 struct mac_lomac *dest; 1436 1437 dest = SLOT(mlabel); 1438 1439 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0); 1440} 1441 1442static void 1443lomac_netinet6_nd6_send(struct ifnet *ifp, struct label *ifplabel, 1444 struct mbuf *m, struct label *mlabel) 1445{ 1446 struct mac_lomac *dest; 1447 1448 dest = SLOT(mlabel); 1449 1450 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0); 1451} 1452 1453static int 1454lomac_pipe_check_ioctl(struct ucred *cred, struct pipepair *pp, 1455 struct label *pplabel, unsigned long cmd, void /* caddr_t */ *data) 1456{ 1457 1458 if (!lomac_enabled) 1459 return (0); 1460 1461 /* XXX: This will be implemented soon... */ 1462 1463 return (0); 1464} 1465 1466static int 1467lomac_pipe_check_read(struct ucred *cred, struct pipepair *pp, 1468 struct label *pplabel) 1469{ 1470 struct mac_lomac *subj, *obj; 1471 1472 if (!lomac_enabled) 1473 return (0); 1474 1475 subj = SLOT(cred->cr_label); 1476 obj = SLOT(pplabel); 1477 1478 if (!lomac_dominate_single(obj, subj)) 1479 return (maybe_demote(subj, obj, "reading", "pipe", NULL)); 1480 1481 return (0); 1482} 1483 1484static int 1485lomac_pipe_check_relabel(struct ucred *cred, struct pipepair *pp, 1486 struct label *pplabel, struct label *newlabel) 1487{ 1488 struct mac_lomac *subj, *obj, *new; 1489 int error; 1490 1491 new = SLOT(newlabel); 1492 subj = SLOT(cred->cr_label); 1493 obj = SLOT(pplabel); 1494 1495 /* 1496 * If there is a LOMAC label update for a pipe, it must be a single 1497 * update. 1498 */ 1499 error = lomac_atmostflags(new, MAC_LOMAC_FLAG_SINGLE); 1500 if (error) 1501 return (error); 1502 1503 /* 1504 * To perform a relabel of a pipe (LOMAC label or not), LOMAC must 1505 * authorize the relabel. 1506 */ 1507 if (!lomac_single_in_range(obj, subj)) 1508 return (EPERM); 1509 1510 /* 1511 * If the LOMAC label is to be changed, authorize as appropriate. 1512 */ 1513 if (new->ml_flags & MAC_LOMAC_FLAG_SINGLE) { 1514 /* 1515 * To change the LOMAC label on a pipe, the new pipe label 1516 * must be in the subject range. 1517 */ 1518 if (!lomac_single_in_range(new, subj)) 1519 return (EPERM); 1520 1521 /* 1522 * To change the LOMAC label on a pipe to be EQUAL, the 1523 * subject must have appropriate privilege. 1524 */ 1525 if (lomac_contains_equal(new)) { 1526 error = lomac_subject_privileged(subj); 1527 if (error) 1528 return (error); 1529 } 1530 } 1531 1532 return (0); 1533} 1534 1535static int 1536lomac_pipe_check_write(struct ucred *cred, struct pipepair *pp, 1537 struct label *pplabel) 1538{ 1539 struct mac_lomac *subj, *obj; 1540 1541 if (!lomac_enabled) 1542 return (0); 1543 1544 subj = SLOT(cred->cr_label); 1545 obj = SLOT(pplabel); 1546 1547 if (!lomac_subject_dominate(subj, obj)) 1548 return (EACCES); 1549 1550 return (0); 1551} 1552 1553static void 1554lomac_pipe_create(struct ucred *cred, struct pipepair *pp, 1555 struct label *pplabel) 1556{ 1557 struct mac_lomac *source, *dest; 1558 1559 source = SLOT(cred->cr_label); 1560 dest = SLOT(pplabel); 1561 1562 lomac_copy_single(source, dest); 1563} 1564 1565static void 1566lomac_pipe_relabel(struct ucred *cred, struct pipepair *pp, 1567 struct label *pplabel, struct label *newlabel) 1568{ 1569 struct mac_lomac *source, *dest; 1570 1571 source = SLOT(newlabel); 1572 dest = SLOT(pplabel); 1573 1574 try_relabel(source, dest); 1575} 1576 1577/* 1578 * Some system privileges are allowed regardless of integrity grade; others 1579 * are allowed only when running with privilege with respect to the LOMAC 1580 * policy as they might otherwise allow bypassing of the integrity policy. 1581 */ 1582static int 1583lomac_priv_check(struct ucred *cred, int priv) 1584{ 1585 struct mac_lomac *subj; 1586 int error; 1587 1588 if (!lomac_enabled) 1589 return (0); 1590 1591 /* 1592 * Exempt only specific privileges from the LOMAC integrity policy. 1593 */ 1594 switch (priv) { 1595 case PRIV_KTRACE: 1596 case PRIV_MSGBUF: 1597 1598 /* 1599 * Allow processes to manipulate basic process audit properties, and 1600 * to submit audit records. 1601 */ 1602 case PRIV_AUDIT_GETAUDIT: 1603 case PRIV_AUDIT_SETAUDIT: 1604 case PRIV_AUDIT_SUBMIT: 1605 1606 /* 1607 * Allow processes to manipulate their regular UNIX credentials. 1608 */ 1609 case PRIV_CRED_SETUID: 1610 case PRIV_CRED_SETEUID: 1611 case PRIV_CRED_SETGID: 1612 case PRIV_CRED_SETEGID: 1613 case PRIV_CRED_SETGROUPS: 1614 case PRIV_CRED_SETREUID: 1615 case PRIV_CRED_SETREGID: 1616 case PRIV_CRED_SETRESUID: 1617 case PRIV_CRED_SETRESGID: 1618 1619 /* 1620 * Allow processes to perform system monitoring. 1621 */ 1622 case PRIV_SEEOTHERGIDS: 1623 case PRIV_SEEOTHERUIDS: 1624 break; 1625 1626 /* 1627 * Allow access to general process debugging facilities. We 1628 * separately control debugging based on MAC label. 1629 */ 1630 case PRIV_DEBUG_DIFFCRED: 1631 case PRIV_DEBUG_SUGID: 1632 case PRIV_DEBUG_UNPRIV: 1633 1634 /* 1635 * Allow manipulating jails. 1636 */ 1637 case PRIV_JAIL_ATTACH: 1638 1639 /* 1640 * Allow privilege with respect to the Partition policy, but not the 1641 * Privs policy. 1642 */ 1643 case PRIV_MAC_PARTITION: 1644 1645 /* 1646 * Allow privilege with respect to process resource limits and login 1647 * context. 1648 */ 1649 case PRIV_PROC_LIMIT: 1650 case PRIV_PROC_SETLOGIN: 1651 case PRIV_PROC_SETRLIMIT: 1652 1653 /* 1654 * Allow System V and POSIX IPC privileges. 1655 */ 1656 case PRIV_IPC_READ: 1657 case PRIV_IPC_WRITE: 1658 case PRIV_IPC_ADMIN: 1659 case PRIV_IPC_MSGSIZE: 1660 case PRIV_MQ_ADMIN: 1661 1662 /* 1663 * Allow certain scheduler manipulations -- possibly this should be 1664 * controlled by more fine-grained policy, as potentially low 1665 * integrity processes can deny CPU to higher integrity ones. 1666 */ 1667 case PRIV_SCHED_DIFFCRED: 1668 case PRIV_SCHED_SETPRIORITY: 1669 case PRIV_SCHED_RTPRIO: 1670 case PRIV_SCHED_SETPOLICY: 1671 case PRIV_SCHED_SET: 1672 case PRIV_SCHED_SETPARAM: 1673 1674 /* 1675 * More IPC privileges. 1676 */ 1677 case PRIV_SEM_WRITE: 1678 1679 /* 1680 * Allow signaling privileges subject to integrity policy. 1681 */ 1682 case PRIV_SIGNAL_DIFFCRED: 1683 case PRIV_SIGNAL_SUGID: 1684 1685 /* 1686 * Allow access to only limited sysctls from lower integrity levels; 1687 * piggy-back on the Jail definition. 1688 */ 1689 case PRIV_SYSCTL_WRITEJAIL: 1690 1691 /* 1692 * Allow TTY-based privileges, subject to general device access using 1693 * labels on TTY device nodes, but not console privilege. 1694 */ 1695 case PRIV_TTY_DRAINWAIT: 1696 case PRIV_TTY_DTRWAIT: 1697 case PRIV_TTY_EXCLUSIVE: 1698 case PRIV_TTY_PRISON: 1699 case PRIV_TTY_STI: 1700 case PRIV_TTY_SETA: 1701 1702 /* 1703 * Grant most VFS privileges, as almost all are in practice bounded 1704 * by more specific checks using labels. 1705 */ 1706 case PRIV_VFS_READ: 1707 case PRIV_VFS_WRITE: 1708 case PRIV_VFS_ADMIN: 1709 case PRIV_VFS_EXEC: 1710 case PRIV_VFS_LOOKUP: 1711 case PRIV_VFS_CHFLAGS_DEV: 1712 case PRIV_VFS_CHOWN: 1713 case PRIV_VFS_CHROOT: 1714 case PRIV_VFS_RETAINSUGID: 1715 case PRIV_VFS_EXCEEDQUOTA: 1716 case PRIV_VFS_FCHROOT: 1717 case PRIV_VFS_FHOPEN: 1718 case PRIV_VFS_FHSTATFS: 1719 case PRIV_VFS_GENERATION: 1720 case PRIV_VFS_GETFH: 1721 case PRIV_VFS_GETQUOTA: 1722 case PRIV_VFS_LINK: 1723 case PRIV_VFS_MOUNT: 1724 case PRIV_VFS_MOUNT_OWNER: 1725 case PRIV_VFS_MOUNT_PERM: 1726 case PRIV_VFS_MOUNT_SUIDDIR: 1727 case PRIV_VFS_MOUNT_NONUSER: 1728 case PRIV_VFS_SETGID: 1729 case PRIV_VFS_STICKYFILE: 1730 case PRIV_VFS_SYSFLAGS: 1731 case PRIV_VFS_UNMOUNT: 1732 1733 /* 1734 * Allow VM privileges; it would be nice if these were subject to 1735 * resource limits. 1736 */ 1737 case PRIV_VM_MADV_PROTECT: 1738 case PRIV_VM_MLOCK: 1739 case PRIV_VM_MUNLOCK: 1740 1741 /* 1742 * Allow some but not all network privileges. In general, dont allow 1743 * reconfiguring the network stack, just normal use. 1744 */ 1745 case PRIV_NETATALK_RESERVEDPORT: 1746 case PRIV_NETINET_RESERVEDPORT: 1747 case PRIV_NETINET_RAW: 1748 case PRIV_NETINET_REUSEPORT: 1749 case PRIV_NETIPX_RESERVEDPORT: 1750 case PRIV_NETIPX_RAW: 1751 break; 1752 1753 /* 1754 * All remaining system privileges are allow only if the process 1755 * holds privilege with respect to the LOMAC policy. 1756 */ 1757 default: 1758 subj = SLOT(cred->cr_label); 1759 error = lomac_subject_privileged(subj); 1760 if (error) 1761 return (error); 1762 } 1763 return (0); 1764} 1765 1766static int 1767lomac_proc_check_debug(struct ucred *cred, struct proc *p) 1768{ 1769 struct mac_lomac *subj, *obj; 1770 1771 if (!lomac_enabled) 1772 return (0); 1773 1774 subj = SLOT(cred->cr_label); 1775 obj = SLOT(p->p_ucred->cr_label); 1776 1777 /* XXX: range checks */ 1778 if (!lomac_dominate_single(obj, subj)) 1779 return (ESRCH); 1780 if (!lomac_subject_dominate(subj, obj)) 1781 return (EACCES); 1782 1783 return (0); 1784} 1785 1786static int 1787lomac_proc_check_sched(struct ucred *cred, struct proc *p) 1788{ 1789 struct mac_lomac *subj, *obj; 1790 1791 if (!lomac_enabled) 1792 return (0); 1793 1794 subj = SLOT(cred->cr_label); 1795 obj = SLOT(p->p_ucred->cr_label); 1796 1797 /* XXX: range checks */ 1798 if (!lomac_dominate_single(obj, subj)) 1799 return (ESRCH); 1800 if (!lomac_subject_dominate(subj, obj)) 1801 return (EACCES); 1802 1803 return (0); 1804} 1805 1806static int 1807lomac_proc_check_signal(struct ucred *cred, struct proc *p, int signum) 1808{ 1809 struct mac_lomac *subj, *obj; 1810 1811 if (!lomac_enabled) 1812 return (0); 1813 1814 subj = SLOT(cred->cr_label); 1815 obj = SLOT(p->p_ucred->cr_label); 1816 1817 /* XXX: range checks */ 1818 if (!lomac_dominate_single(obj, subj)) 1819 return (ESRCH); 1820 if (!lomac_subject_dominate(subj, obj)) 1821 return (EACCES); 1822 1823 return (0); 1824} 1825 1826static void 1827lomac_proc_create_init(struct ucred *cred) 1828{ 1829 struct mac_lomac *dest; 1830 1831 dest = SLOT(cred->cr_label); 1832 1833 lomac_set_single(dest, MAC_LOMAC_TYPE_HIGH, 0); 1834 lomac_set_range(dest, MAC_LOMAC_TYPE_LOW, 0, MAC_LOMAC_TYPE_HIGH, 0); 1835} 1836 1837static void 1838lomac_proc_create_swapper(struct ucred *cred) 1839{ 1840 struct mac_lomac *dest; 1841 1842 dest = SLOT(cred->cr_label); 1843 1844 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0); 1845 lomac_set_range(dest, MAC_LOMAC_TYPE_LOW, 0, MAC_LOMAC_TYPE_HIGH, 0); 1846} 1847 1848static void 1849lomac_proc_destroy_label(struct label *label) 1850{ 1851 1852 mtx_destroy(&PSLOT(label)->mtx); 1853 FREE(PSLOT(label), M_LOMAC); 1854 PSLOT_SET(label, NULL); 1855} 1856 1857static void 1858lomac_proc_init_label(struct label *label) 1859{ 1860 1861 PSLOT_SET(label, malloc(sizeof(struct mac_lomac_proc), M_LOMAC, 1862 M_ZERO | M_WAITOK)); 1863 mtx_init(&PSLOT(label)->mtx, "MAC/Lomac proc lock", NULL, MTX_DEF); 1864} 1865 1866static int 1867lomac_socket_check_deliver(struct socket *so, struct label *solabel, 1868 struct mbuf *m, struct label *mlabel) 1869{ 1870 struct mac_lomac *p, *s; 1871 1872 if (!lomac_enabled) 1873 return (0); 1874 1875 p = SLOT(mlabel); 1876 s = SLOT(solabel); 1877 1878 return (lomac_equal_single(p, s) ? 0 : EACCES); 1879} 1880 1881static int 1882lomac_socket_check_relabel(struct ucred *cred, struct socket *so, 1883 struct label *solabel, struct label *newlabel) 1884{ 1885 struct mac_lomac *subj, *obj, *new; 1886 int error; 1887 1888 new = SLOT(newlabel); 1889 subj = SLOT(cred->cr_label); 1890 obj = SLOT(solabel); 1891 1892 /* 1893 * If there is a LOMAC label update for the socket, it may be an 1894 * update of single. 1895 */ 1896 error = lomac_atmostflags(new, MAC_LOMAC_FLAG_SINGLE); 1897 if (error) 1898 return (error); 1899 1900 /* 1901 * To relabel a socket, the old socket single must be in the subject 1902 * range. 1903 */ 1904 if (!lomac_single_in_range(obj, subj)) 1905 return (EPERM); 1906 1907 /* 1908 * If the LOMAC label is to be changed, authorize as appropriate. 1909 */ 1910 if (new->ml_flags & MAC_LOMAC_FLAG_SINGLE) { 1911 /* 1912 * To relabel a socket, the new socket single must be in the 1913 * subject range. 1914 */ 1915 if (!lomac_single_in_range(new, subj)) 1916 return (EPERM); 1917 1918 /* 1919 * To change the LOMAC label on the socket to contain EQUAL, 1920 * the subject must have appropriate privilege. 1921 */ 1922 if (lomac_contains_equal(new)) { 1923 error = lomac_subject_privileged(subj); 1924 if (error) 1925 return (error); 1926 } 1927 } 1928 1929 return (0); 1930} 1931 1932static int 1933lomac_socket_check_visible(struct ucred *cred, struct socket *so, 1934 struct label *solabel) 1935{ 1936 struct mac_lomac *subj, *obj; 1937 1938 if (!lomac_enabled) 1939 return (0); 1940 1941 subj = SLOT(cred->cr_label); 1942 obj = SLOT(solabel); 1943 1944 if (!lomac_dominate_single(obj, subj)) 1945 return (ENOENT); 1946 1947 return (0); 1948} 1949 1950static void 1951lomac_socket_create(struct ucred *cred, struct socket *so, 1952 struct label *solabel) 1953{ 1954 struct mac_lomac *source, *dest; 1955 1956 source = SLOT(cred->cr_label); 1957 dest = SLOT(solabel); 1958 1959 lomac_copy_single(source, dest); 1960} 1961 1962static void 1963lomac_socket_create_mbuf(struct socket *so, struct label *solabel, 1964 struct mbuf *m, struct label *mlabel) 1965{ 1966 struct mac_lomac *source, *dest; 1967 1968 source = SLOT(solabel); 1969 dest = SLOT(mlabel); 1970 1971 lomac_copy_single(source, dest); 1972} 1973 1974static void 1975lomac_socket_newconn(struct socket *oldso, struct label *oldsolabel, 1976 struct socket *newso, struct label *newsolabel) 1977{ 1978 struct mac_lomac *source, *dest; 1979 1980 source = SLOT(oldsolabel); 1981 dest = SLOT(newsolabel); 1982 1983 lomac_copy_single(source, dest); 1984} 1985 1986static void 1987lomac_socket_relabel(struct ucred *cred, struct socket *so, 1988 struct label *solabel, struct label *newlabel) 1989{ 1990 struct mac_lomac *source, *dest; 1991 1992 source = SLOT(newlabel); 1993 dest = SLOT(solabel); 1994 1995 try_relabel(source, dest); 1996} 1997 1998static void 1999lomac_socketpeer_set_from_mbuf(struct mbuf *m, struct label *mlabel, 2000 struct socket *so, struct label *sopeerlabel) 2001{ 2002 struct mac_lomac *source, *dest; 2003 2004 source = SLOT(mlabel); 2005 dest = SLOT(sopeerlabel); 2006 2007 lomac_copy_single(source, dest); 2008} 2009 2010static void 2011lomac_socketpeer_set_from_socket(struct socket *oldso, 2012 struct label *oldsolabel, struct socket *newso, 2013 struct label *newsopeerlabel) 2014{ 2015 struct mac_lomac *source, *dest; 2016 2017 source = SLOT(oldsolabel); 2018 dest = SLOT(newsopeerlabel); 2019 2020 lomac_copy_single(source, dest); 2021} 2022 2023static void 2024lomac_syncache_create(struct label *label, struct inpcb *inp) 2025{ 2026 struct mac_lomac *source, *dest; 2027 2028 source = SLOT(inp->inp_label); 2029 dest = SLOT(label); 2030 lomac_copy(source, dest); 2031} 2032 2033static void 2034lomac_syncache_create_mbuf(struct label *sc_label, struct mbuf *m, 2035 struct label *mlabel) 2036{ 2037 struct mac_lomac *source, *dest; 2038 2039 source = SLOT(sc_label); 2040 dest = SLOT(mlabel); 2041 lomac_copy(source, dest); 2042} 2043 2044static int 2045lomac_system_check_acct(struct ucred *cred, struct vnode *vp, 2046 struct label *vplabel) 2047{ 2048 struct mac_lomac *subj, *obj; 2049 2050 if (!lomac_enabled) 2051 return (0); 2052 2053 subj = SLOT(cred->cr_label); 2054 obj = SLOT(vplabel); 2055 2056 if (lomac_subject_privileged(subj)) 2057 return (EPERM); 2058 2059 if (!lomac_high_single(obj)) 2060 return (EACCES); 2061 2062 return (0); 2063} 2064 2065static int 2066lomac_system_check_auditctl(struct ucred *cred, struct vnode *vp, 2067 struct label *vplabel) 2068{ 2069 struct mac_lomac *subj, *obj; 2070 2071 if (!lomac_enabled) 2072 return (0); 2073 2074 subj = SLOT(cred->cr_label); 2075 obj = SLOT(vplabel); 2076 2077 if (lomac_subject_privileged(subj)) 2078 return (EPERM); 2079 2080 if (!lomac_high_single(obj)) 2081 return (EACCES); 2082 2083 return (0); 2084} 2085 2086static int 2087lomac_system_check_swapoff(struct ucred *cred, struct vnode *vp, 2088 struct label *vplabel) 2089{ 2090 struct mac_lomac *subj; 2091 2092 if (!lomac_enabled) 2093 return (0); 2094 2095 subj = SLOT(cred->cr_label); 2096 2097 if (lomac_subject_privileged(subj)) 2098 return (EPERM); 2099 2100 return (0); 2101} 2102 2103static int 2104lomac_system_check_swapon(struct ucred *cred, struct vnode *vp, 2105 struct label *vplabel) 2106{ 2107 struct mac_lomac *subj, *obj; 2108 2109 if (!lomac_enabled) 2110 return (0); 2111 2112 subj = SLOT(cred->cr_label); 2113 obj = SLOT(vplabel); 2114 2115 if (lomac_subject_privileged(subj)) 2116 return (EPERM); 2117 2118 if (!lomac_high_single(obj)) 2119 return (EACCES); 2120 2121 return (0); 2122} 2123 2124static int 2125lomac_system_check_sysctl(struct ucred *cred, struct sysctl_oid *oidp, 2126 void *arg1, int arg2, struct sysctl_req *req) 2127{ 2128 struct mac_lomac *subj; 2129 2130 if (!lomac_enabled) 2131 return (0); 2132 2133 subj = SLOT(cred->cr_label); 2134 2135 /* 2136 * Treat sysctl variables without CTLFLAG_ANYBODY flag as lomac/high, 2137 * but also require privilege to change them. 2138 */ 2139 if (req->newptr != NULL && (oidp->oid_kind & CTLFLAG_ANYBODY) == 0) { 2140#ifdef notdef 2141 if (!lomac_subject_dominate_high(subj)) 2142 return (EACCES); 2143#endif 2144 2145 if (lomac_subject_privileged(subj)) 2146 return (EPERM); 2147 } 2148 2149 return (0); 2150} 2151 2152static void 2153lomac_thread_userret(struct thread *td) 2154{ 2155 struct proc *p = td->td_proc; 2156 struct mac_lomac_proc *subj = PSLOT(p->p_label); 2157 struct ucred *newcred, *oldcred; 2158 int dodrop; 2159 2160 mtx_lock(&subj->mtx); 2161 if (subj->mac_lomac.ml_flags & MAC_LOMAC_FLAG_UPDATE) { 2162 dodrop = 0; 2163 mtx_unlock(&subj->mtx); 2164 newcred = crget(); 2165 /* 2166 * Prevent a lock order reversal in 2167 * mac_cred_mmapped_drop_perms; ideally, the other user of 2168 * subj->mtx wouldn't be holding Giant. 2169 */ 2170 mtx_lock(&Giant); 2171 PROC_LOCK(p); 2172 mtx_lock(&subj->mtx); 2173 /* 2174 * Check if we lost the race while allocating the cred. 2175 */ 2176 if ((subj->mac_lomac.ml_flags & MAC_LOMAC_FLAG_UPDATE) == 0) { 2177 crfree(newcred); 2178 goto out; 2179 } 2180 oldcred = p->p_ucred; 2181 crcopy(newcred, oldcred); 2182 crhold(newcred); 2183 lomac_copy(&subj->mac_lomac, SLOT(newcred->cr_label)); 2184 p->p_ucred = newcred; 2185 crfree(oldcred); 2186 dodrop = 1; 2187 out: 2188 mtx_unlock(&subj->mtx); 2189 PROC_UNLOCK(p); 2190 if (dodrop) 2191 mac_cred_mmapped_drop_perms(curthread, newcred); 2192 mtx_unlock(&Giant); 2193 } else { 2194 mtx_unlock(&subj->mtx); 2195 } 2196} 2197 2198static int 2199lomac_vnode_associate_extattr(struct mount *mp, struct label *mplabel, 2200 struct vnode *vp, struct label *vplabel) 2201{ 2202 struct mac_lomac ml_temp, *source, *dest; 2203 int buflen, error; 2204 2205 source = SLOT(mplabel); 2206 dest = SLOT(vplabel); 2207 2208 buflen = sizeof(ml_temp); 2209 bzero(&ml_temp, buflen); 2210 2211 error = vn_extattr_get(vp, IO_NODELOCKED, MAC_LOMAC_EXTATTR_NAMESPACE, 2212 MAC_LOMAC_EXTATTR_NAME, &buflen, (char *)&ml_temp, curthread); 2213 if (error == ENOATTR || error == EOPNOTSUPP) { 2214 /* Fall back to the mntlabel. */ 2215 lomac_copy_single(source, dest); 2216 return (0); 2217 } else if (error) 2218 return (error); 2219 2220 if (buflen != sizeof(ml_temp)) { 2221 if (buflen != sizeof(ml_temp) - sizeof(ml_temp.ml_auxsingle)) { 2222 printf("lomac_vnode_associate_extattr: bad size %d\n", 2223 buflen); 2224 return (EPERM); 2225 } 2226 bzero(&ml_temp.ml_auxsingle, sizeof(ml_temp.ml_auxsingle)); 2227 buflen = sizeof(ml_temp); 2228 (void)vn_extattr_set(vp, IO_NODELOCKED, 2229 MAC_LOMAC_EXTATTR_NAMESPACE, MAC_LOMAC_EXTATTR_NAME, 2230 buflen, (char *)&ml_temp, curthread); 2231 } 2232 if (lomac_valid(&ml_temp) != 0) { 2233 printf("lomac_vnode_associate_extattr: invalid\n"); 2234 return (EPERM); 2235 } 2236 if ((ml_temp.ml_flags & MAC_LOMAC_FLAGS_BOTH) != 2237 MAC_LOMAC_FLAG_SINGLE) { 2238 printf("lomac_vnode_associate_extattr: not single\n"); 2239 return (EPERM); 2240 } 2241 2242 lomac_copy_single(&ml_temp, dest); 2243 return (0); 2244} 2245 2246static void 2247lomac_vnode_associate_singlelabel(struct mount *mp, struct label *mplabel, 2248 struct vnode *vp, struct label *vplabel) 2249{ 2250 struct mac_lomac *source, *dest; 2251 2252 source = SLOT(mplabel); 2253 dest = SLOT(vplabel); 2254 2255 lomac_copy_single(source, dest); 2256} 2257 2258static int 2259lomac_vnode_check_create(struct ucred *cred, struct vnode *dvp, 2260 struct label *dvplabel, struct componentname *cnp, struct vattr *vap) 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(dvplabel); 2269 2270 if (!lomac_subject_dominate(subj, obj)) 2271 return (EACCES); 2272 if (obj->ml_flags & MAC_LOMAC_FLAG_AUX && 2273 !lomac_dominate_element(&subj->ml_single, &obj->ml_auxsingle)) 2274 return (EACCES); 2275 2276 return (0); 2277} 2278 2279static int 2280lomac_vnode_check_deleteacl(struct ucred *cred, struct vnode *vp, 2281 struct label *vplabel, acl_type_t type) 2282{ 2283 struct mac_lomac *subj, *obj; 2284 2285 if (!lomac_enabled) 2286 return (0); 2287 2288 subj = SLOT(cred->cr_label); 2289 obj = SLOT(vplabel); 2290 2291 if (!lomac_subject_dominate(subj, obj)) 2292 return (EACCES); 2293 2294 return (0); 2295} 2296 2297static int 2298lomac_vnode_check_link(struct ucred *cred, struct vnode *dvp, 2299 struct label *dvplabel, struct vnode *vp, struct label *vplabel, 2300 struct componentname *cnp) 2301{ 2302 struct mac_lomac *subj, *obj; 2303 2304 if (!lomac_enabled) 2305 return (0); 2306 2307 subj = SLOT(cred->cr_label); 2308 obj = SLOT(dvplabel); 2309 2310 if (!lomac_subject_dominate(subj, obj)) 2311 return (EACCES); 2312 2313 obj = SLOT(vplabel); 2314 2315 if (!lomac_subject_dominate(subj, obj)) 2316 return (EACCES); 2317 2318 return (0); 2319} 2320 2321static int 2322lomac_vnode_check_mmap(struct ucred *cred, struct vnode *vp, 2323 struct label *vplabel, int prot, int flags) 2324{ 2325 struct mac_lomac *subj, *obj; 2326 2327 /* 2328 * Rely on the use of open()-time protections to handle 2329 * non-revocation cases. 2330 */ 2331 if (!lomac_enabled) 2332 return (0); 2333 2334 subj = SLOT(cred->cr_label); 2335 obj = SLOT(vplabel); 2336 2337 if (((prot & VM_PROT_WRITE) != 0) && ((flags & MAP_SHARED) != 0)) { 2338 if (!lomac_subject_dominate(subj, obj)) 2339 return (EACCES); 2340 } 2341 if (prot & (VM_PROT_READ | VM_PROT_EXECUTE)) { 2342 if (!lomac_dominate_single(obj, subj)) 2343 return (maybe_demote(subj, obj, "mapping", "file", vp)); 2344 } 2345 2346 return (0); 2347} 2348 2349static void 2350lomac_vnode_check_mmap_downgrade(struct ucred *cred, struct vnode *vp, 2351 struct label *vplabel, /* XXX vm_prot_t */ int *prot) 2352{ 2353 struct mac_lomac *subj, *obj; 2354 2355 /* 2356 * Rely on the use of open()-time protections to handle 2357 * non-revocation cases. 2358 */ 2359 if (!lomac_enabled || !revocation_enabled) 2360 return; 2361 2362 subj = SLOT(cred->cr_label); 2363 obj = SLOT(vplabel); 2364 2365 if (!lomac_subject_dominate(subj, obj)) 2366 *prot &= ~VM_PROT_WRITE; 2367} 2368 2369static int 2370lomac_vnode_check_open(struct ucred *cred, struct vnode *vp, 2371 struct label *vplabel, int acc_mode) 2372{ 2373 struct mac_lomac *subj, *obj; 2374 2375 if (!lomac_enabled) 2376 return (0); 2377 2378 subj = SLOT(cred->cr_label); 2379 obj = SLOT(vplabel); 2380 2381 /* XXX privilege override for admin? */ 2382 if (acc_mode & (VWRITE | VAPPEND | VADMIN)) { 2383 if (!lomac_subject_dominate(subj, obj)) 2384 return (EACCES); 2385 } 2386 2387 return (0); 2388} 2389 2390static int 2391lomac_vnode_check_read(struct ucred *active_cred, struct ucred *file_cred, 2392 struct vnode *vp, struct label *vplabel) 2393{ 2394 struct mac_lomac *subj, *obj; 2395 2396 if (!lomac_enabled || !revocation_enabled) 2397 return (0); 2398 2399 subj = SLOT(active_cred->cr_label); 2400 obj = SLOT(vplabel); 2401 2402 if (!lomac_dominate_single(obj, subj)) 2403 return (maybe_demote(subj, obj, "reading", "file", vp)); 2404 2405 return (0); 2406} 2407 2408static int 2409lomac_vnode_check_relabel(struct ucred *cred, struct vnode *vp, 2410 struct label *vplabel, struct label *newlabel) 2411{ 2412 struct mac_lomac *old, *new, *subj; 2413 int error; 2414 2415 old = SLOT(vplabel); 2416 new = SLOT(newlabel); 2417 subj = SLOT(cred->cr_label); 2418 2419 /* 2420 * If there is a LOMAC label update for the vnode, it must be a 2421 * single label, with an optional explicit auxiliary single. 2422 */ 2423 error = lomac_atmostflags(new, 2424 MAC_LOMAC_FLAG_SINGLE | MAC_LOMAC_FLAG_AUX); 2425 if (error) 2426 return (error); 2427 2428 /* 2429 * To perform a relabel of the vnode (LOMAC label or not), LOMAC must 2430 * authorize the relabel. 2431 */ 2432 if (!lomac_single_in_range(old, subj)) 2433 return (EPERM); 2434 2435 /* 2436 * If the LOMAC label is to be changed, authorize as appropriate. 2437 */ 2438 if (new->ml_flags & MAC_LOMAC_FLAG_SINGLE) { 2439 /* 2440 * To change the LOMAC label on a vnode, the new vnode label 2441 * must be in the subject range. 2442 */ 2443 if (!lomac_single_in_range(new, subj)) 2444 return (EPERM); 2445 2446 /* 2447 * To change the LOMAC label on the vnode to be EQUAL, the 2448 * subject must have appropriate privilege. 2449 */ 2450 if (lomac_contains_equal(new)) { 2451 error = lomac_subject_privileged(subj); 2452 if (error) 2453 return (error); 2454 } 2455 } 2456 if (new->ml_flags & MAC_LOMAC_FLAG_AUX) { 2457 /* 2458 * Fill in the missing parts from the previous label. 2459 */ 2460 if ((new->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0) 2461 lomac_copy_single(subj, new); 2462 2463 /* 2464 * To change the auxiliary LOMAC label on a vnode, the new 2465 * vnode label must be in the subject range. 2466 */ 2467 if (!lomac_auxsingle_in_range(new, subj)) 2468 return (EPERM); 2469 2470 /* 2471 * To change the auxiliary LOMAC label on the vnode to be 2472 * EQUAL, the subject must have appropriate privilege. 2473 */ 2474 if (lomac_contains_equal(new)) { 2475 error = lomac_subject_privileged(subj); 2476 if (error) 2477 return (error); 2478 } 2479 } 2480 2481 return (0); 2482} 2483 2484static int 2485lomac_vnode_check_rename_from(struct ucred *cred, struct vnode *dvp, 2486 struct label *dvplabel, struct vnode *vp, struct label *vplabel, 2487 struct componentname *cnp) 2488{ 2489 struct mac_lomac *subj, *obj; 2490 2491 if (!lomac_enabled) 2492 return (0); 2493 2494 subj = SLOT(cred->cr_label); 2495 obj = SLOT(dvplabel); 2496 2497 if (!lomac_subject_dominate(subj, obj)) 2498 return (EACCES); 2499 2500 obj = SLOT(vplabel); 2501 2502 if (!lomac_subject_dominate(subj, obj)) 2503 return (EACCES); 2504 2505 return (0); 2506} 2507 2508static int 2509lomac_vnode_check_rename_to(struct ucred *cred, struct vnode *dvp, 2510 struct label *dvplabel, struct vnode *vp, struct label *vplabel, 2511 int samedir, struct componentname *cnp) 2512{ 2513 struct mac_lomac *subj, *obj; 2514 2515 if (!lomac_enabled) 2516 return (0); 2517 2518 subj = SLOT(cred->cr_label); 2519 obj = SLOT(dvplabel); 2520 2521 if (!lomac_subject_dominate(subj, obj)) 2522 return (EACCES); 2523 2524 if (vp != NULL) { 2525 obj = SLOT(vplabel); 2526 2527 if (!lomac_subject_dominate(subj, obj)) 2528 return (EACCES); 2529 } 2530 2531 return (0); 2532} 2533 2534static int 2535lomac_vnode_check_revoke(struct ucred *cred, struct vnode *vp, 2536 struct label *vplabel) 2537{ 2538 struct mac_lomac *subj, *obj; 2539 2540 if (!lomac_enabled) 2541 return (0); 2542 2543 subj = SLOT(cred->cr_label); 2544 obj = SLOT(vplabel); 2545 2546 if (!lomac_subject_dominate(subj, obj)) 2547 return (EACCES); 2548 2549 return (0); 2550} 2551 2552static int 2553lomac_vnode_check_setacl(struct ucred *cred, struct vnode *vp, 2554 struct label *vplabel, acl_type_t type, struct acl *acl) 2555{ 2556 struct mac_lomac *subj, *obj; 2557 2558 if (!lomac_enabled) 2559 return (0); 2560 2561 subj = SLOT(cred->cr_label); 2562 obj = SLOT(vplabel); 2563 2564 if (!lomac_subject_dominate(subj, obj)) 2565 return (EACCES); 2566 2567 return (0); 2568} 2569 2570static int 2571lomac_vnode_check_setextattr(struct ucred *cred, struct vnode *vp, 2572 struct label *vplabel, int attrnamespace, const char *name, 2573 struct uio *uio) 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(vplabel); 2582 2583 if (!lomac_subject_dominate(subj, obj)) 2584 return (EACCES); 2585 2586 /* XXX: protect the MAC EA in a special way? */ 2587 2588 return (0); 2589} 2590 2591static int 2592lomac_vnode_check_setflags(struct ucred *cred, struct vnode *vp, 2593 struct label *vplabel, u_long flags) 2594{ 2595 struct mac_lomac *subj, *obj; 2596 2597 if (!lomac_enabled) 2598 return (0); 2599 2600 subj = SLOT(cred->cr_label); 2601 obj = SLOT(vplabel); 2602 2603 if (!lomac_subject_dominate(subj, obj)) 2604 return (EACCES); 2605 2606 return (0); 2607} 2608 2609static int 2610lomac_vnode_check_setmode(struct ucred *cred, struct vnode *vp, 2611 struct label *vplabel, mode_t mode) 2612{ 2613 struct mac_lomac *subj, *obj; 2614 2615 if (!lomac_enabled) 2616 return (0); 2617 2618 subj = SLOT(cred->cr_label); 2619 obj = SLOT(vplabel); 2620 2621 if (!lomac_subject_dominate(subj, obj)) 2622 return (EACCES); 2623 2624 return (0); 2625} 2626 2627static int 2628lomac_vnode_check_setowner(struct ucred *cred, struct vnode *vp, 2629 struct label *vplabel, uid_t uid, gid_t gid) 2630{ 2631 struct mac_lomac *subj, *obj; 2632 2633 if (!lomac_enabled) 2634 return (0); 2635 2636 subj = SLOT(cred->cr_label); 2637 obj = SLOT(vplabel); 2638 2639 if (!lomac_subject_dominate(subj, obj)) 2640 return (EACCES); 2641 2642 return (0); 2643} 2644 2645static int 2646lomac_vnode_check_setutimes(struct ucred *cred, struct vnode *vp, 2647 struct label *vplabel, struct timespec atime, struct timespec mtime) 2648{ 2649 struct mac_lomac *subj, *obj; 2650 2651 if (!lomac_enabled) 2652 return (0); 2653 2654 subj = SLOT(cred->cr_label); 2655 obj = SLOT(vplabel); 2656 2657 if (!lomac_subject_dominate(subj, obj)) 2658 return (EACCES); 2659 2660 return (0); 2661} 2662 2663static int 2664lomac_vnode_check_unlink(struct ucred *cred, struct vnode *dvp, 2665 struct label *dvplabel, struct vnode *vp, struct label *vplabel, 2666 struct componentname *cnp) 2667{ 2668 struct mac_lomac *subj, *obj; 2669 2670 if (!lomac_enabled) 2671 return (0); 2672 2673 subj = SLOT(cred->cr_label); 2674 obj = SLOT(dvplabel); 2675 2676 if (!lomac_subject_dominate(subj, obj)) 2677 return (EACCES); 2678 2679 obj = SLOT(vplabel); 2680 2681 if (!lomac_subject_dominate(subj, obj)) 2682 return (EACCES); 2683 2684 return (0); 2685} 2686 2687static int 2688lomac_vnode_check_write(struct ucred *active_cred, 2689 struct ucred *file_cred, struct vnode *vp, struct label *vplabel) 2690{ 2691 struct mac_lomac *subj, *obj; 2692 2693 if (!lomac_enabled || !revocation_enabled) 2694 return (0); 2695 2696 subj = SLOT(active_cred->cr_label); 2697 obj = SLOT(vplabel); 2698 2699 if (!lomac_subject_dominate(subj, obj)) 2700 return (EACCES); 2701 2702 return (0); 2703} 2704 2705static int 2706lomac_vnode_create_extattr(struct ucred *cred, struct mount *mp, 2707 struct label *mplabel, struct vnode *dvp, struct label *dvplabel, 2708 struct vnode *vp, struct label *vplabel, struct componentname *cnp) 2709{ 2710 struct mac_lomac *source, *dest, *dir, temp; 2711 size_t buflen; 2712 int error; 2713 2714 buflen = sizeof(temp); 2715 bzero(&temp, buflen); 2716 2717 source = SLOT(cred->cr_label); 2718 dest = SLOT(vplabel); 2719 dir = SLOT(dvplabel); 2720 if (dir->ml_flags & MAC_LOMAC_FLAG_AUX) { 2721 lomac_copy_auxsingle(dir, &temp); 2722 lomac_set_single(&temp, dir->ml_auxsingle.mle_type, 2723 dir->ml_auxsingle.mle_grade); 2724 } else { 2725 lomac_copy_single(source, &temp); 2726 } 2727 2728 error = vn_extattr_set(vp, IO_NODELOCKED, MAC_LOMAC_EXTATTR_NAMESPACE, 2729 MAC_LOMAC_EXTATTR_NAME, buflen, (char *)&temp, curthread); 2730 if (error == 0) 2731 lomac_copy(&temp, dest); 2732 return (error); 2733} 2734 2735static void 2736lomac_vnode_execve_transition(struct ucred *old, struct ucred *new, 2737 struct vnode *vp, struct label *vplabel, struct label *interpvplabel, 2738 struct image_params *imgp, struct label *execlabel) 2739{ 2740 struct mac_lomac *source, *dest, *obj, *robj; 2741 2742 source = SLOT(old->cr_label); 2743 dest = SLOT(new->cr_label); 2744 obj = SLOT(vplabel); 2745 robj = interpvplabel != NULL ? SLOT(interpvplabel) : obj; 2746 2747 lomac_copy(source, dest); 2748 /* 2749 * If there's an auxiliary label on the real object, respect it and 2750 * assume that this level should be assumed immediately if a higher 2751 * level is currently in place. 2752 */ 2753 if (robj->ml_flags & MAC_LOMAC_FLAG_AUX && 2754 !lomac_dominate_element(&robj->ml_auxsingle, &dest->ml_single) 2755 && lomac_auxsingle_in_range(robj, dest)) 2756 lomac_set_single(dest, robj->ml_auxsingle.mle_type, 2757 robj->ml_auxsingle.mle_grade); 2758 /* 2759 * Restructuring to use the execve transitioning mechanism instead of 2760 * the normal demotion mechanism here would be difficult, so just 2761 * copy the label over and perform standard demotion. This is also 2762 * non-optimal because it will result in the intermediate label "new" 2763 * being created and immediately recycled. 2764 */ 2765 if (lomac_enabled && revocation_enabled && 2766 !lomac_dominate_single(obj, source)) 2767 (void)maybe_demote(source, obj, "executing", "file", vp); 2768} 2769 2770static int 2771lomac_vnode_execve_will_transition(struct ucred *old, struct vnode *vp, 2772 struct label *vplabel, struct label *interpvplabel, 2773 struct image_params *imgp, struct label *execlabel) 2774{ 2775 struct mac_lomac *subj, *obj, *robj; 2776 2777 if (!lomac_enabled || !revocation_enabled) 2778 return (0); 2779 2780 subj = SLOT(old->cr_label); 2781 obj = SLOT(vplabel); 2782 robj = interpvplabel != NULL ? SLOT(interpvplabel) : obj; 2783 2784 return ((robj->ml_flags & MAC_LOMAC_FLAG_AUX && 2785 !lomac_dominate_element(&robj->ml_auxsingle, &subj->ml_single) 2786 && lomac_auxsingle_in_range(robj, subj)) || 2787 !lomac_dominate_single(obj, subj)); 2788} 2789 2790static void 2791lomac_vnode_relabel(struct ucred *cred, struct vnode *vp, 2792 struct label *vplabel, struct label *newlabel) 2793{ 2794 struct mac_lomac *source, *dest; 2795 2796 source = SLOT(newlabel); 2797 dest = SLOT(vplabel); 2798 2799 try_relabel(source, dest); 2800} 2801 2802static int 2803lomac_vnode_setlabel_extattr(struct ucred *cred, struct vnode *vp, 2804 struct label *vplabel, struct label *intlabel) 2805{ 2806 struct mac_lomac *source, temp; 2807 size_t buflen; 2808 int error; 2809 2810 buflen = sizeof(temp); 2811 bzero(&temp, buflen); 2812 2813 source = SLOT(intlabel); 2814 if ((source->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0) 2815 return (0); 2816 2817 lomac_copy_single(source, &temp); 2818 error = vn_extattr_set(vp, IO_NODELOCKED, MAC_LOMAC_EXTATTR_NAMESPACE, 2819 MAC_LOMAC_EXTATTR_NAME, buflen, (char *)&temp, curthread); 2820 return (error); 2821} 2822 2823static struct mac_policy_ops lomac_ops = 2824{ 2825 .mpo_init = lomac_init, 2826 2827 .mpo_bpfdesc_check_receive = lomac_bpfdesc_check_receive, 2828 .mpo_bpfdesc_create = lomac_bpfdesc_create, 2829 .mpo_bpfdesc_create_mbuf = lomac_bpfdesc_create_mbuf, 2830 .mpo_bpfdesc_destroy_label = lomac_destroy_label, 2831 .mpo_bpfdesc_init_label = lomac_init_label, 2832 2833 .mpo_cred_check_relabel = lomac_cred_check_relabel, 2834 .mpo_cred_check_visible = lomac_cred_check_visible, 2835 .mpo_cred_copy_label = lomac_copy_label, 2836 .mpo_cred_destroy_label = lomac_destroy_label, 2837 .mpo_cred_externalize_label = lomac_externalize_label, 2838 .mpo_cred_init_label = lomac_init_label, 2839 .mpo_cred_internalize_label = lomac_internalize_label, 2840 .mpo_cred_relabel = lomac_cred_relabel, 2841 2842 .mpo_devfs_create_device = lomac_devfs_create_device, 2843 .mpo_devfs_create_directory = lomac_devfs_create_directory, 2844 .mpo_devfs_create_symlink = lomac_devfs_create_symlink, 2845 .mpo_devfs_destroy_label = lomac_destroy_label, 2846 .mpo_devfs_init_label = lomac_init_label, 2847 .mpo_devfs_update = lomac_devfs_update, 2848 .mpo_devfs_vnode_associate = lomac_devfs_vnode_associate, 2849 2850 .mpo_ifnet_check_relabel = lomac_ifnet_check_relabel, 2851 .mpo_ifnet_check_transmit = lomac_ifnet_check_transmit, 2852 .mpo_ifnet_copy_label = lomac_copy_label, 2853 .mpo_ifnet_create = lomac_ifnet_create, 2854 .mpo_ifnet_create_mbuf = lomac_ifnet_create_mbuf, 2855 .mpo_ifnet_destroy_label = lomac_destroy_label, 2856 .mpo_ifnet_externalize_label = lomac_externalize_label, 2857 .mpo_ifnet_init_label = lomac_init_label, 2858 .mpo_ifnet_internalize_label = lomac_internalize_label, 2859 .mpo_ifnet_relabel = lomac_ifnet_relabel, 2860 2861 .mpo_syncache_create = lomac_syncache_create, 2862 .mpo_syncache_destroy_label = lomac_destroy_label, 2863 .mpo_syncache_init_label = lomac_init_label_waitcheck, 2864 2865 .mpo_inpcb_check_deliver = lomac_inpcb_check_deliver, 2866 .mpo_inpcb_create = lomac_inpcb_create, 2867 .mpo_inpcb_create_mbuf = lomac_inpcb_create_mbuf, 2868 .mpo_inpcb_destroy_label = lomac_destroy_label, 2869 .mpo_inpcb_init_label = lomac_init_label_waitcheck, 2870 .mpo_inpcb_sosetlabel = lomac_inpcb_sosetlabel, 2871 2872 .mpo_ipq_create = lomac_ipq_create, 2873 .mpo_ipq_destroy_label = lomac_destroy_label, 2874 .mpo_ipq_init_label = lomac_init_label_waitcheck, 2875 .mpo_ipq_match = lomac_ipq_match, 2876 .mpo_ipq_reassemble = lomac_ipq_reassemble, 2877 .mpo_ipq_update = lomac_ipq_update, 2878 2879 .mpo_kld_check_load = lomac_kld_check_load, 2880 2881 .mpo_mbuf_copy_label = lomac_copy_label, 2882 .mpo_mbuf_destroy_label = lomac_destroy_label, 2883 .mpo_mbuf_init_label = lomac_init_label_waitcheck, 2884 2885 .mpo_mount_create = lomac_mount_create, 2886 .mpo_mount_destroy_label = lomac_destroy_label, 2887 .mpo_mount_init_label = lomac_init_label, 2888 2889 .mpo_netatalk_aarp_send = lomac_netatalk_aarp_send, 2890 2891 .mpo_netinet_arp_send = lomac_netinet_arp_send, 2892 .mpo_netinet_firewall_reply = lomac_netinet_firewall_reply, 2893 .mpo_netinet_firewall_send = lomac_netinet_firewall_send, 2894 .mpo_netinet_fragment = lomac_netinet_fragment, 2895 .mpo_netinet_icmp_reply = lomac_netinet_icmp_reply, 2896 .mpo_netinet_igmp_send = lomac_netinet_igmp_send, 2897 2898 .mpo_netinet6_nd6_send = lomac_netinet6_nd6_send, 2899 2900 .mpo_pipe_check_ioctl = lomac_pipe_check_ioctl, 2901 .mpo_pipe_check_read = lomac_pipe_check_read, 2902 .mpo_pipe_check_relabel = lomac_pipe_check_relabel, 2903 .mpo_pipe_check_write = lomac_pipe_check_write, 2904 .mpo_pipe_copy_label = lomac_copy_label, 2905 .mpo_pipe_create = lomac_pipe_create, 2906 .mpo_pipe_destroy_label = lomac_destroy_label, 2907 .mpo_pipe_externalize_label = lomac_externalize_label, 2908 .mpo_pipe_init_label = lomac_init_label, 2909 .mpo_pipe_internalize_label = lomac_internalize_label, 2910 .mpo_pipe_relabel = lomac_pipe_relabel, 2911 2912 .mpo_priv_check = lomac_priv_check, 2913 2914 .mpo_proc_check_debug = lomac_proc_check_debug, 2915 .mpo_proc_check_sched = lomac_proc_check_sched, 2916 .mpo_proc_check_signal = lomac_proc_check_signal, 2917 .mpo_proc_create_swapper = lomac_proc_create_swapper, 2918 .mpo_proc_create_init = lomac_proc_create_init, 2919 .mpo_proc_destroy_label = lomac_proc_destroy_label, 2920 .mpo_proc_init_label = lomac_proc_init_label, 2921 2922 .mpo_socket_check_deliver = lomac_socket_check_deliver, 2923 .mpo_socket_check_relabel = lomac_socket_check_relabel, 2924 .mpo_socket_check_visible = lomac_socket_check_visible, 2925 .mpo_socket_copy_label = lomac_copy_label, 2926 .mpo_socket_create = lomac_socket_create, 2927 .mpo_socket_create_mbuf = lomac_socket_create_mbuf, 2928 .mpo_socket_destroy_label = lomac_destroy_label, 2929 .mpo_socket_externalize_label = lomac_externalize_label, 2930 .mpo_socket_init_label = lomac_init_label_waitcheck, 2931 .mpo_socket_internalize_label = lomac_internalize_label, 2932 .mpo_socket_newconn = lomac_socket_newconn, 2933 .mpo_socket_relabel = lomac_socket_relabel, 2934 2935 .mpo_socketpeer_destroy_label = lomac_destroy_label, 2936 .mpo_socketpeer_externalize_label = lomac_externalize_label, 2937 .mpo_socketpeer_init_label = lomac_init_label_waitcheck, 2938 .mpo_socketpeer_set_from_mbuf = lomac_socketpeer_set_from_mbuf, 2939 .mpo_socketpeer_set_from_socket = lomac_socketpeer_set_from_socket, 2940 2941 .mpo_syncache_create_mbuf = lomac_syncache_create_mbuf, 2942 2943 .mpo_system_check_acct = lomac_system_check_acct, 2944 .mpo_system_check_auditctl = lomac_system_check_auditctl, 2945 .mpo_system_check_swapoff = lomac_system_check_swapoff, 2946 .mpo_system_check_swapon = lomac_system_check_swapon, 2947 .mpo_system_check_sysctl = lomac_system_check_sysctl, 2948 2949 .mpo_thread_userret = lomac_thread_userret, 2950 2951 .mpo_vnode_associate_extattr = lomac_vnode_associate_extattr, 2952 .mpo_vnode_associate_singlelabel = lomac_vnode_associate_singlelabel, 2953 .mpo_vnode_check_access = lomac_vnode_check_open, 2954 .mpo_vnode_check_create = lomac_vnode_check_create, 2955 .mpo_vnode_check_deleteacl = lomac_vnode_check_deleteacl, 2956 .mpo_vnode_check_link = lomac_vnode_check_link, 2957 .mpo_vnode_check_mmap = lomac_vnode_check_mmap, 2958 .mpo_vnode_check_mmap_downgrade = lomac_vnode_check_mmap_downgrade, 2959 .mpo_vnode_check_open = lomac_vnode_check_open, 2960 .mpo_vnode_check_read = lomac_vnode_check_read, 2961 .mpo_vnode_check_relabel = lomac_vnode_check_relabel, 2962 .mpo_vnode_check_rename_from = lomac_vnode_check_rename_from, 2963 .mpo_vnode_check_rename_to = lomac_vnode_check_rename_to, 2964 .mpo_vnode_check_revoke = lomac_vnode_check_revoke, 2965 .mpo_vnode_check_setacl = lomac_vnode_check_setacl, 2966 .mpo_vnode_check_setextattr = lomac_vnode_check_setextattr, 2967 .mpo_vnode_check_setflags = lomac_vnode_check_setflags, 2968 .mpo_vnode_check_setmode = lomac_vnode_check_setmode, 2969 .mpo_vnode_check_setowner = lomac_vnode_check_setowner, 2970 .mpo_vnode_check_setutimes = lomac_vnode_check_setutimes, 2971 .mpo_vnode_check_unlink = lomac_vnode_check_unlink, 2972 .mpo_vnode_check_write = lomac_vnode_check_write, 2973 .mpo_vnode_copy_label = lomac_copy_label, 2974 .mpo_vnode_create_extattr = lomac_vnode_create_extattr, 2975 .mpo_vnode_destroy_label = lomac_destroy_label, 2976 .mpo_vnode_execve_transition = lomac_vnode_execve_transition, 2977 .mpo_vnode_execve_will_transition = lomac_vnode_execve_will_transition, 2978 .mpo_vnode_externalize_label = lomac_externalize_label, 2979 .mpo_vnode_init_label = lomac_init_label, 2980 .mpo_vnode_internalize_label = lomac_internalize_label, 2981 .mpo_vnode_relabel = lomac_vnode_relabel, 2982 .mpo_vnode_setlabel_extattr = lomac_vnode_setlabel_extattr, 2983}; 2984 2985MAC_POLICY_SET(&lomac_ops, mac_lomac, "TrustedBSD MAC/LOMAC", 2986 MPC_LOADTIME_FLAG_NOTLATE | MPC_LOADTIME_FLAG_LABELMBUFS, &lomac_slot); 2987