mac_lomac.c revision 184308
1/*- 2 * Copyright (c) 1999-2002, 2007-2008 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 184308 2008-10-26 22:46:37Z 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) == 0) { 567 log(LOG_INFO, "LOMAC: level-%s subject p%dg%du%d:%s demoted to" 568 " level %s after %s a level-%s %s (inode=%ld, " 569 "mountpount=%s)\n", 570 subjlabeltext, p->p_pid, pgid, curthread->td_ucred->cr_uid, 571 p->p_comm, subjtext, actionname, objlabeltext, objname, 572 va.va_fileid, vp->v_mount->mnt_stat.f_mntonname); 573 } else { 574 log(LOG_INFO, "LOMAC: level-%s subject p%dg%du%d:%s demoted to" 575 " level %s after %s a level-%s %s\n", 576 subjlabeltext, p->p_pid, pgid, curthread->td_ucred->cr_uid, 577 p->p_comm, subjtext, actionname, objlabeltext, objname); 578 } 579 580 sbuf_delete(&subjlabel_sb); 581 sbuf_delete(&subjtext_sb); 582 sbuf_delete(&objlabel_sb); 583 584 return (0); 585} 586 587/* 588 * Relabel "to" to "from" only if "from" is a valid label (contains at least 589 * a single), as for a relabel operation which may or may not involve a 590 * relevant label. 591 */ 592static void 593try_relabel(struct mac_lomac *from, struct mac_lomac *to) 594{ 595 596 if (from->ml_flags & MAC_LOMAC_FLAG_SINGLE) { 597 bzero(to, sizeof(*to)); 598 lomac_copy(from, to); 599 } 600} 601 602/* 603 * Policy module operations. 604 */ 605static void 606lomac_init(struct mac_policy_conf *conf) 607{ 608 609} 610 611/* 612 * Label operations. 613 */ 614static void 615lomac_init_label(struct label *label) 616{ 617 618 SLOT_SET(label, lomac_alloc(M_WAITOK)); 619} 620 621static int 622lomac_init_label_waitcheck(struct label *label, int flag) 623{ 624 625 SLOT_SET(label, lomac_alloc(flag)); 626 if (SLOT(label) == NULL) 627 return (ENOMEM); 628 629 return (0); 630} 631 632static void 633lomac_destroy_label(struct label *label) 634{ 635 636 lomac_free(SLOT(label)); 637 SLOT_SET(label, NULL); 638} 639 640static int 641lomac_element_to_string(struct sbuf *sb, struct mac_lomac_element *element) 642{ 643 644 switch (element->mle_type) { 645 case MAC_LOMAC_TYPE_HIGH: 646 return (sbuf_printf(sb, "high")); 647 648 case MAC_LOMAC_TYPE_LOW: 649 return (sbuf_printf(sb, "low")); 650 651 case MAC_LOMAC_TYPE_EQUAL: 652 return (sbuf_printf(sb, "equal")); 653 654 case MAC_LOMAC_TYPE_GRADE: 655 return (sbuf_printf(sb, "%d", element->mle_grade)); 656 657 default: 658 panic("lomac_element_to_string: invalid type (%d)", 659 element->mle_type); 660 } 661} 662 663static int 664lomac_to_string(struct sbuf *sb, struct mac_lomac *ml) 665{ 666 667 if (ml->ml_flags & MAC_LOMAC_FLAG_SINGLE) { 668 if (lomac_element_to_string(sb, &ml->ml_single) == -1) 669 return (EINVAL); 670 } 671 672 if (ml->ml_flags & MAC_LOMAC_FLAG_AUX) { 673 if (sbuf_putc(sb, '[') == -1) 674 return (EINVAL); 675 676 if (lomac_element_to_string(sb, &ml->ml_auxsingle) == -1) 677 return (EINVAL); 678 679 if (sbuf_putc(sb, ']') == -1) 680 return (EINVAL); 681 } 682 683 if (ml->ml_flags & MAC_LOMAC_FLAG_RANGE) { 684 if (sbuf_putc(sb, '(') == -1) 685 return (EINVAL); 686 687 if (lomac_element_to_string(sb, &ml->ml_rangelow) == -1) 688 return (EINVAL); 689 690 if (sbuf_putc(sb, '-') == -1) 691 return (EINVAL); 692 693 if (lomac_element_to_string(sb, &ml->ml_rangehigh) == -1) 694 return (EINVAL); 695 696 if (sbuf_putc(sb, ')') == -1) 697 return (EINVAL); 698 } 699 700 return (0); 701} 702 703static int 704lomac_externalize_label(struct label *label, char *element_name, 705 struct sbuf *sb, int *claimed) 706{ 707 struct mac_lomac *ml; 708 709 if (strcmp(MAC_LOMAC_LABEL_NAME, element_name) != 0) 710 return (0); 711 712 (*claimed)++; 713 714 ml = SLOT(label); 715 716 return (lomac_to_string(sb, ml)); 717} 718 719static int 720lomac_parse_element(struct mac_lomac_element *element, char *string) 721{ 722 723 if (strcmp(string, "high") == 0 || strcmp(string, "hi") == 0) { 724 element->mle_type = MAC_LOMAC_TYPE_HIGH; 725 element->mle_grade = MAC_LOMAC_TYPE_UNDEF; 726 } else if (strcmp(string, "low") == 0 || strcmp(string, "lo") == 0) { 727 element->mle_type = MAC_LOMAC_TYPE_LOW; 728 element->mle_grade = MAC_LOMAC_TYPE_UNDEF; 729 } else if (strcmp(string, "equal") == 0 || 730 strcmp(string, "eq") == 0) { 731 element->mle_type = MAC_LOMAC_TYPE_EQUAL; 732 element->mle_grade = MAC_LOMAC_TYPE_UNDEF; 733 } else { 734 char *p0, *p1; 735 int d; 736 737 p0 = string; 738 d = strtol(p0, &p1, 10); 739 740 if (d < 0 || d > 65535) 741 return (EINVAL); 742 element->mle_type = MAC_LOMAC_TYPE_GRADE; 743 element->mle_grade = d; 744 745 if (p1 == p0 || *p1 != '\0') 746 return (EINVAL); 747 } 748 749 return (0); 750} 751 752/* 753 * Note: destructively consumes the string, make a local copy before calling 754 * if that's a problem. 755 */ 756static int 757lomac_parse(struct mac_lomac *ml, char *string) 758{ 759 char *range, *rangeend, *rangehigh, *rangelow, *single, *auxsingle, 760 *auxsingleend; 761 int error; 762 763 /* Do we have a range? */ 764 single = string; 765 range = index(string, '('); 766 if (range == single) 767 single = NULL; 768 auxsingle = index(string, '['); 769 if (auxsingle == single) 770 single = NULL; 771 if (range != NULL && auxsingle != NULL) 772 return (EINVAL); 773 rangelow = rangehigh = NULL; 774 if (range != NULL) { 775 /* Nul terminate the end of the single string. */ 776 *range = '\0'; 777 range++; 778 rangelow = range; 779 rangehigh = index(rangelow, '-'); 780 if (rangehigh == NULL) 781 return (EINVAL); 782 rangehigh++; 783 if (*rangelow == '\0' || *rangehigh == '\0') 784 return (EINVAL); 785 rangeend = index(rangehigh, ')'); 786 if (rangeend == NULL) 787 return (EINVAL); 788 if (*(rangeend + 1) != '\0') 789 return (EINVAL); 790 /* Nul terminate the ends of the ranges. */ 791 *(rangehigh - 1) = '\0'; 792 *rangeend = '\0'; 793 } 794 KASSERT((rangelow != NULL && rangehigh != NULL) || 795 (rangelow == NULL && rangehigh == NULL), 796 ("lomac_internalize_label: range mismatch")); 797 if (auxsingle != NULL) { 798 /* Nul terminate the end of the single string. */ 799 *auxsingle = '\0'; 800 auxsingle++; 801 auxsingleend = index(auxsingle, ']'); 802 if (auxsingleend == NULL) 803 return (EINVAL); 804 if (*(auxsingleend + 1) != '\0') 805 return (EINVAL); 806 /* Nul terminate the end of the auxsingle. */ 807 *auxsingleend = '\0'; 808 } 809 810 bzero(ml, sizeof(*ml)); 811 if (single != NULL) { 812 error = lomac_parse_element(&ml->ml_single, single); 813 if (error) 814 return (error); 815 ml->ml_flags |= MAC_LOMAC_FLAG_SINGLE; 816 } 817 818 if (auxsingle != NULL) { 819 error = lomac_parse_element(&ml->ml_auxsingle, auxsingle); 820 if (error) 821 return (error); 822 ml->ml_flags |= MAC_LOMAC_FLAG_AUX; 823 } 824 825 if (rangelow != NULL) { 826 error = lomac_parse_element(&ml->ml_rangelow, rangelow); 827 if (error) 828 return (error); 829 error = lomac_parse_element(&ml->ml_rangehigh, rangehigh); 830 if (error) 831 return (error); 832 ml->ml_flags |= MAC_LOMAC_FLAG_RANGE; 833 } 834 835 error = lomac_valid(ml); 836 if (error) 837 return (error); 838 839 return (0); 840} 841 842static int 843lomac_internalize_label(struct label *label, char *element_name, 844 char *element_data, int *claimed) 845{ 846 struct mac_lomac *ml, ml_temp; 847 int error; 848 849 if (strcmp(MAC_LOMAC_LABEL_NAME, element_name) != 0) 850 return (0); 851 852 (*claimed)++; 853 854 error = lomac_parse(&ml_temp, element_data); 855 if (error) 856 return (error); 857 858 ml = SLOT(label); 859 *ml = ml_temp; 860 861 return (0); 862} 863 864static void 865lomac_copy_label(struct label *src, struct label *dest) 866{ 867 868 *SLOT(dest) = *SLOT(src); 869} 870 871/* 872 * Object-specific entry point implementations are sorted alphabetically by 873 * object type name and then by operation. 874 */ 875static int 876lomac_bpfdesc_check_receive(struct bpf_d *d, struct label *dlabel, 877 struct ifnet *ifp, struct label *ifplabel) 878{ 879 struct mac_lomac *a, *b; 880 881 if (!lomac_enabled) 882 return (0); 883 884 a = SLOT(dlabel); 885 b = SLOT(ifplabel); 886 887 if (lomac_equal_single(a, b)) 888 return (0); 889 return (EACCES); 890} 891 892static void 893lomac_bpfdesc_create(struct ucred *cred, struct bpf_d *d, 894 struct label *dlabel) 895{ 896 struct mac_lomac *source, *dest; 897 898 source = SLOT(cred->cr_label); 899 dest = SLOT(dlabel); 900 901 lomac_copy_single(source, dest); 902} 903 904static void 905lomac_bpfdesc_create_mbuf(struct bpf_d *d, struct label *dlabel, 906 struct mbuf *m, struct label *mlabel) 907{ 908 struct mac_lomac *source, *dest; 909 910 source = SLOT(dlabel); 911 dest = SLOT(mlabel); 912 913 lomac_copy_single(source, dest); 914} 915 916static int 917lomac_cred_check_relabel(struct ucred *cred, struct label *newlabel) 918{ 919 struct mac_lomac *subj, *new; 920 int error; 921 922 subj = SLOT(cred->cr_label); 923 new = SLOT(newlabel); 924 925 /* 926 * If there is a LOMAC label update for the credential, it may be an 927 * update of the single, range, or both. 928 */ 929 error = lomac_atmostflags(new, MAC_LOMAC_FLAGS_BOTH); 930 if (error) 931 return (error); 932 933 /* 934 * If the LOMAC label is to be changed, authorize as appropriate. 935 */ 936 if (new->ml_flags & MAC_LOMAC_FLAGS_BOTH) { 937 /* 938 * Fill in the missing parts from the previous label. 939 */ 940 if ((new->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0) 941 lomac_copy_single(subj, new); 942 if ((new->ml_flags & MAC_LOMAC_FLAG_RANGE) == 0) 943 lomac_copy_range(subj, new); 944 945 /* 946 * To change the LOMAC range on a credential, the new range 947 * label must be in the current range. 948 */ 949 if (!lomac_range_in_range(new, subj)) 950 return (EPERM); 951 952 /* 953 * To change the LOMAC single label on a credential, the new 954 * single label must be in the new range. Implicitly from 955 * the previous check, the new single is in the old range. 956 */ 957 if (!lomac_single_in_range(new, new)) 958 return (EPERM); 959 960 /* 961 * To have EQUAL in any component of the new credential LOMAC 962 * label, the subject must already have EQUAL in their label. 963 */ 964 if (lomac_contains_equal(new)) { 965 error = lomac_subject_privileged(subj); 966 if (error) 967 return (error); 968 } 969 970 /* 971 * XXXMAC: Additional consistency tests regarding the single 972 * and range of the new label might be performed here. 973 */ 974 } 975 976 return (0); 977} 978 979static int 980lomac_cred_check_visible(struct ucred *cr1, struct ucred *cr2) 981{ 982 struct mac_lomac *subj, *obj; 983 984 if (!lomac_enabled) 985 return (0); 986 987 subj = SLOT(cr1->cr_label); 988 obj = SLOT(cr2->cr_label); 989 990 /* XXX: range */ 991 if (!lomac_dominate_single(obj, subj)) 992 return (ESRCH); 993 994 return (0); 995} 996static void 997lomac_cred_relabel(struct ucred *cred, struct label *newlabel) 998{ 999 struct mac_lomac *source, *dest; 1000 1001 source = SLOT(newlabel); 1002 dest = SLOT(cred->cr_label); 1003 1004 try_relabel(source, dest); 1005} 1006 1007static void 1008lomac_devfs_create_device(struct ucred *cred, struct mount *mp, 1009 struct cdev *dev, struct devfs_dirent *de, struct label *delabel) 1010{ 1011 struct mac_lomac *ml; 1012 int lomac_type; 1013 1014 ml = SLOT(delabel); 1015 if (strcmp(dev->si_name, "null") == 0 || 1016 strcmp(dev->si_name, "zero") == 0 || 1017 strcmp(dev->si_name, "random") == 0 || 1018 strncmp(dev->si_name, "fd/", strlen("fd/")) == 0 || 1019 strncmp(dev->si_name, "ttyv", strlen("ttyv")) == 0) 1020 lomac_type = MAC_LOMAC_TYPE_EQUAL; 1021 else if (ptys_equal && 1022 (strncmp(dev->si_name, "ttyp", strlen("ttyp")) == 0 || 1023 strncmp(dev->si_name, "ptyp", strlen("ptyp")) == 0)) 1024 lomac_type = MAC_LOMAC_TYPE_EQUAL; 1025 else 1026 lomac_type = MAC_LOMAC_TYPE_HIGH; 1027 lomac_set_single(ml, lomac_type, 0); 1028} 1029 1030static void 1031lomac_devfs_create_directory(struct mount *mp, char *dirname, int dirnamelen, 1032 struct devfs_dirent *de, struct label *delabel) 1033{ 1034 struct mac_lomac *ml; 1035 1036 ml = SLOT(delabel); 1037 lomac_set_single(ml, MAC_LOMAC_TYPE_HIGH, 0); 1038} 1039 1040static void 1041lomac_devfs_create_symlink(struct ucred *cred, struct mount *mp, 1042 struct devfs_dirent *dd, struct label *ddlabel, struct devfs_dirent *de, 1043 struct label *delabel) 1044{ 1045 struct mac_lomac *source, *dest; 1046 1047 source = SLOT(cred->cr_label); 1048 dest = SLOT(delabel); 1049 1050 lomac_copy_single(source, dest); 1051} 1052 1053static void 1054lomac_devfs_update(struct mount *mp, struct devfs_dirent *de, 1055 struct label *delabel, struct vnode *vp, struct label *vplabel) 1056{ 1057 struct mac_lomac *source, *dest; 1058 1059 source = SLOT(vplabel); 1060 dest = SLOT(delabel); 1061 1062 lomac_copy(source, dest); 1063} 1064 1065static void 1066lomac_devfs_vnode_associate(struct mount *mp, struct label *mplabel, 1067 struct devfs_dirent *de, struct label *delabel, struct vnode *vp, 1068 struct label *vplabel) 1069{ 1070 struct mac_lomac *source, *dest; 1071 1072 source = SLOT(delabel); 1073 dest = SLOT(vplabel); 1074 1075 lomac_copy_single(source, dest); 1076} 1077 1078static int 1079lomac_ifnet_check_relabel(struct ucred *cred, struct ifnet *ifp, 1080 struct label *ifplabel, struct label *newlabel) 1081{ 1082 struct mac_lomac *subj, *new; 1083 int error; 1084 1085 subj = SLOT(cred->cr_label); 1086 new = SLOT(newlabel); 1087 1088 /* 1089 * If there is a LOMAC label update for the interface, it may be an 1090 * update of the single, range, or both. 1091 */ 1092 error = lomac_atmostflags(new, MAC_LOMAC_FLAGS_BOTH); 1093 if (error) 1094 return (error); 1095 1096 /* 1097 * Relabling network interfaces requires LOMAC privilege. 1098 */ 1099 error = lomac_subject_privileged(subj); 1100 if (error) 1101 return (error); 1102 1103 /* 1104 * If the LOMAC label is to be changed, authorize as appropriate. 1105 */ 1106 if (new->ml_flags & MAC_LOMAC_FLAGS_BOTH) { 1107 /* 1108 * Fill in the missing parts from the previous label. 1109 */ 1110 if ((new->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0) 1111 lomac_copy_single(subj, new); 1112 if ((new->ml_flags & MAC_LOMAC_FLAG_RANGE) == 0) 1113 lomac_copy_range(subj, new); 1114 1115 /* 1116 * Rely on the traditional superuser status for the LOMAC 1117 * interface relabel requirements. XXXMAC: This will go 1118 * away. 1119 * 1120 * XXXRW: This is also redundant to a higher layer check. 1121 */ 1122 error = priv_check_cred(cred, PRIV_NET_SETIFMAC, 0); 1123 if (error) 1124 return (EPERM); 1125 1126 /* 1127 * XXXMAC: Additional consistency tests regarding the single 1128 * and the range of the new label might be performed here. 1129 */ 1130 } 1131 1132 return (0); 1133} 1134 1135static int 1136lomac_ifnet_check_transmit(struct ifnet *ifp, struct label *ifplabel, 1137 struct mbuf *m, struct label *mlabel) 1138{ 1139 struct mac_lomac *p, *i; 1140 1141 if (!lomac_enabled) 1142 return (0); 1143 1144 p = SLOT(mlabel); 1145 i = SLOT(ifplabel); 1146 1147 return (lomac_single_in_range(p, i) ? 0 : EACCES); 1148} 1149 1150static void 1151lomac_ifnet_create(struct ifnet *ifp, struct label *ifplabel) 1152{ 1153 char tifname[IFNAMSIZ], *p, *q; 1154 char tiflist[sizeof(trusted_interfaces)]; 1155 struct mac_lomac *dest; 1156 int len, grade; 1157 1158 dest = SLOT(ifplabel); 1159 1160 if (ifp->if_type == IFT_LOOP) { 1161 grade = MAC_LOMAC_TYPE_EQUAL; 1162 goto set; 1163 } 1164 1165 if (trust_all_interfaces) { 1166 grade = MAC_LOMAC_TYPE_HIGH; 1167 goto set; 1168 } 1169 1170 grade = MAC_LOMAC_TYPE_LOW; 1171 1172 if (trusted_interfaces[0] == '\0' || 1173 !strvalid(trusted_interfaces, sizeof(trusted_interfaces))) 1174 goto set; 1175 1176 bzero(tiflist, sizeof(tiflist)); 1177 for (p = trusted_interfaces, q = tiflist; *p != '\0'; p++, q++) 1178 if(*p != ' ' && *p != '\t') 1179 *q = *p; 1180 1181 for (p = q = tiflist;; p++) { 1182 if (*p == ',' || *p == '\0') { 1183 len = p - q; 1184 if (len < IFNAMSIZ) { 1185 bzero(tifname, sizeof(tifname)); 1186 bcopy(q, tifname, len); 1187 if (strcmp(tifname, ifp->if_xname) == 0) { 1188 grade = MAC_LOMAC_TYPE_HIGH; 1189 break; 1190 } 1191 } 1192 else { 1193 *p = '\0'; 1194 printf("MAC/LOMAC warning: interface name " 1195 "\"%s\" is too long (must be < %d)\n", 1196 q, IFNAMSIZ); 1197 } 1198 if (*p == '\0') 1199 break; 1200 q = p + 1; 1201 } 1202 } 1203set: 1204 lomac_set_single(dest, grade, 0); 1205 lomac_set_range(dest, grade, 0, grade, 0); 1206} 1207 1208static void 1209lomac_ifnet_create_mbuf(struct ifnet *ifp, struct label *ifplabel, 1210 struct mbuf *m, struct label *mlabel) 1211{ 1212 struct mac_lomac *source, *dest; 1213 1214 source = SLOT(ifplabel); 1215 dest = SLOT(mlabel); 1216 1217 lomac_copy_single(source, dest); 1218} 1219 1220static void 1221lomac_ifnet_relabel(struct ucred *cred, struct ifnet *ifp, 1222 struct label *ifplabel, struct label *newlabel) 1223{ 1224 struct mac_lomac *source, *dest; 1225 1226 source = SLOT(newlabel); 1227 dest = SLOT(ifplabel); 1228 1229 try_relabel(source, dest); 1230} 1231 1232static int 1233lomac_inpcb_check_deliver(struct inpcb *inp, struct label *inplabel, 1234 struct mbuf *m, struct label *mlabel) 1235{ 1236 struct mac_lomac *p, *i; 1237 1238 if (!lomac_enabled) 1239 return (0); 1240 1241 p = SLOT(mlabel); 1242 i = SLOT(inplabel); 1243 1244 return (lomac_equal_single(p, i) ? 0 : EACCES); 1245} 1246 1247static int 1248lomac_inpcb_check_visible(struct ucred *cred, struct inpcb *inp, 1249 struct label *inplabel) 1250{ 1251 struct mac_lomac *subj, *obj; 1252 1253 if (!lomac_enabled) 1254 return (0); 1255 1256 subj = SLOT(cred->cr_label); 1257 obj = SLOT(inplabel); 1258 1259 if (!lomac_dominate_single(obj, subj)) 1260 return (ENOENT); 1261 1262 return (0); 1263} 1264 1265static void 1266lomac_inpcb_create(struct socket *so, struct label *solabel, 1267 struct inpcb *inp, struct label *inplabel) 1268{ 1269 struct mac_lomac *source, *dest; 1270 1271 source = SLOT(solabel); 1272 dest = SLOT(inplabel); 1273 1274 lomac_copy_single(source, dest); 1275} 1276 1277static void 1278lomac_inpcb_create_mbuf(struct inpcb *inp, struct label *inplabel, 1279 struct mbuf *m, struct label *mlabel) 1280{ 1281 struct mac_lomac *source, *dest; 1282 1283 source = SLOT(inplabel); 1284 dest = SLOT(mlabel); 1285 1286 lomac_copy_single(source, dest); 1287} 1288 1289static void 1290lomac_inpcb_sosetlabel(struct socket *so, struct label *solabel, 1291 struct inpcb *inp, struct label *inplabel) 1292{ 1293 struct mac_lomac *source, *dest; 1294 1295 source = SLOT(solabel); 1296 dest = SLOT(inplabel); 1297 1298 lomac_copy_single(source, dest); 1299} 1300 1301static void 1302lomac_ip6q_create(struct mbuf *m, struct label *mlabel, struct ip6q *q6, 1303 struct label *q6label) 1304{ 1305 struct mac_lomac *source, *dest; 1306 1307 source = SLOT(mlabel); 1308 dest = SLOT(q6label); 1309 1310 lomac_copy_single(source, dest); 1311} 1312 1313static int 1314lomac_ip6q_match(struct mbuf *m, struct label *mlabel, struct ip6q *q6, 1315 struct label *q6label) 1316{ 1317 struct mac_lomac *a, *b; 1318 1319 a = SLOT(q6label); 1320 b = SLOT(mlabel); 1321 1322 return (lomac_equal_single(a, b)); 1323} 1324 1325static void 1326lomac_ip6q_reassemble(struct ip6q *q6, struct label *q6label, struct mbuf *m, 1327 struct label *mlabel) 1328{ 1329 struct mac_lomac *source, *dest; 1330 1331 source = SLOT(q6label); 1332 dest = SLOT(mlabel); 1333 1334 /* Just use the head, since we require them all to match. */ 1335 lomac_copy_single(source, dest); 1336} 1337 1338static void 1339lomac_ip6q_update(struct mbuf *m, struct label *mlabel, struct ip6q *q6, 1340 struct label *q6label) 1341{ 1342 1343 /* NOOP: we only accept matching labels, so no need to update */ 1344} 1345 1346static void 1347lomac_ipq_create(struct mbuf *m, struct label *mlabel, struct ipq *q, 1348 struct label *qlabel) 1349{ 1350 struct mac_lomac *source, *dest; 1351 1352 source = SLOT(mlabel); 1353 dest = SLOT(qlabel); 1354 1355 lomac_copy_single(source, dest); 1356} 1357 1358static int 1359lomac_ipq_match(struct mbuf *m, struct label *mlabel, struct ipq *q, 1360 struct label *qlabel) 1361{ 1362 struct mac_lomac *a, *b; 1363 1364 a = SLOT(qlabel); 1365 b = SLOT(mlabel); 1366 1367 return (lomac_equal_single(a, b)); 1368} 1369 1370static void 1371lomac_ipq_reassemble(struct ipq *q, struct label *qlabel, struct mbuf *m, 1372 struct label *mlabel) 1373{ 1374 struct mac_lomac *source, *dest; 1375 1376 source = SLOT(qlabel); 1377 dest = SLOT(mlabel); 1378 1379 /* Just use the head, since we require them all to match. */ 1380 lomac_copy_single(source, dest); 1381} 1382 1383static void 1384lomac_ipq_update(struct mbuf *m, struct label *mlabel, struct ipq *q, 1385 struct label *qlabel) 1386{ 1387 1388 /* NOOP: we only accept matching labels, so no need to update */ 1389} 1390 1391static int 1392lomac_kld_check_load(struct ucred *cred, struct vnode *vp, 1393 struct label *vplabel) 1394{ 1395 struct mac_lomac *subj, *obj; 1396 1397 if (!lomac_enabled) 1398 return (0); 1399 1400 subj = SLOT(cred->cr_label); 1401 obj = SLOT(vplabel); 1402 1403 if (lomac_subject_privileged(subj)) 1404 return (EPERM); 1405 1406 if (!lomac_high_single(obj)) 1407 return (EACCES); 1408 1409 return (0); 1410} 1411 1412static void 1413lomac_mount_create(struct ucred *cred, struct mount *mp, 1414 struct label *mplabel) 1415{ 1416 struct mac_lomac *source, *dest; 1417 1418 source = SLOT(cred->cr_label); 1419 dest = SLOT(mplabel); 1420 lomac_copy_single(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_fragment(struct mbuf *m, struct label *mlabel, 1470 struct mbuf *frag, struct label *fraglabel) 1471{ 1472 struct mac_lomac *source, *dest; 1473 1474 source = SLOT(mlabel); 1475 dest = SLOT(fraglabel); 1476 1477 lomac_copy_single(source, dest); 1478} 1479 1480static void 1481lomac_netinet_icmp_reply(struct mbuf *mrecv, struct label *mrecvlabel, 1482 struct mbuf *msend, struct label *msendlabel) 1483{ 1484 struct mac_lomac *source, *dest; 1485 1486 source = SLOT(mrecvlabel); 1487 dest = SLOT(msendlabel); 1488 1489 lomac_copy_single(source, dest); 1490} 1491 1492static void 1493lomac_netinet_igmp_send(struct ifnet *ifp, struct label *ifplabel, 1494 struct mbuf *m, struct label *mlabel) 1495{ 1496 struct mac_lomac *dest; 1497 1498 dest = SLOT(mlabel); 1499 1500 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0); 1501} 1502 1503static void 1504lomac_netinet6_nd6_send(struct ifnet *ifp, struct label *ifplabel, 1505 struct mbuf *m, struct label *mlabel) 1506{ 1507 struct mac_lomac *dest; 1508 1509 dest = SLOT(mlabel); 1510 1511 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0); 1512} 1513 1514static int 1515lomac_pipe_check_ioctl(struct ucred *cred, struct pipepair *pp, 1516 struct label *pplabel, unsigned long cmd, void /* caddr_t */ *data) 1517{ 1518 1519 if (!lomac_enabled) 1520 return (0); 1521 1522 /* XXX: This will be implemented soon... */ 1523 1524 return (0); 1525} 1526 1527static int 1528lomac_pipe_check_read(struct ucred *cred, struct pipepair *pp, 1529 struct label *pplabel) 1530{ 1531 struct mac_lomac *subj, *obj; 1532 1533 if (!lomac_enabled) 1534 return (0); 1535 1536 subj = SLOT(cred->cr_label); 1537 obj = SLOT(pplabel); 1538 1539 if (!lomac_dominate_single(obj, subj)) 1540 return (maybe_demote(subj, obj, "reading", "pipe", NULL)); 1541 1542 return (0); 1543} 1544 1545static int 1546lomac_pipe_check_relabel(struct ucred *cred, struct pipepair *pp, 1547 struct label *pplabel, struct label *newlabel) 1548{ 1549 struct mac_lomac *subj, *obj, *new; 1550 int error; 1551 1552 new = SLOT(newlabel); 1553 subj = SLOT(cred->cr_label); 1554 obj = SLOT(pplabel); 1555 1556 /* 1557 * If there is a LOMAC label update for a pipe, it must be a single 1558 * update. 1559 */ 1560 error = lomac_atmostflags(new, MAC_LOMAC_FLAG_SINGLE); 1561 if (error) 1562 return (error); 1563 1564 /* 1565 * To perform a relabel of a pipe (LOMAC label or not), LOMAC must 1566 * authorize the relabel. 1567 */ 1568 if (!lomac_single_in_range(obj, subj)) 1569 return (EPERM); 1570 1571 /* 1572 * If the LOMAC label is to be changed, authorize as appropriate. 1573 */ 1574 if (new->ml_flags & MAC_LOMAC_FLAG_SINGLE) { 1575 /* 1576 * To change the LOMAC label on a pipe, the new pipe label 1577 * must be in the subject range. 1578 */ 1579 if (!lomac_single_in_range(new, subj)) 1580 return (EPERM); 1581 1582 /* 1583 * To change the LOMAC label on a pipe to be EQUAL, the 1584 * subject must have appropriate privilege. 1585 */ 1586 if (lomac_contains_equal(new)) { 1587 error = lomac_subject_privileged(subj); 1588 if (error) 1589 return (error); 1590 } 1591 } 1592 1593 return (0); 1594} 1595 1596static int 1597lomac_pipe_check_write(struct ucred *cred, struct pipepair *pp, 1598 struct label *pplabel) 1599{ 1600 struct mac_lomac *subj, *obj; 1601 1602 if (!lomac_enabled) 1603 return (0); 1604 1605 subj = SLOT(cred->cr_label); 1606 obj = SLOT(pplabel); 1607 1608 if (!lomac_subject_dominate(subj, obj)) 1609 return (EACCES); 1610 1611 return (0); 1612} 1613 1614static void 1615lomac_pipe_create(struct ucred *cred, struct pipepair *pp, 1616 struct label *pplabel) 1617{ 1618 struct mac_lomac *source, *dest; 1619 1620 source = SLOT(cred->cr_label); 1621 dest = SLOT(pplabel); 1622 1623 lomac_copy_single(source, dest); 1624} 1625 1626static void 1627lomac_pipe_relabel(struct ucred *cred, struct pipepair *pp, 1628 struct label *pplabel, struct label *newlabel) 1629{ 1630 struct mac_lomac *source, *dest; 1631 1632 source = SLOT(newlabel); 1633 dest = SLOT(pplabel); 1634 1635 try_relabel(source, dest); 1636} 1637 1638/* 1639 * Some system privileges are allowed regardless of integrity grade; others 1640 * are allowed only when running with privilege with respect to the LOMAC 1641 * policy as they might otherwise allow bypassing of the integrity policy. 1642 */ 1643static int 1644lomac_priv_check(struct ucred *cred, int priv) 1645{ 1646 struct mac_lomac *subj; 1647 int error; 1648 1649 if (!lomac_enabled) 1650 return (0); 1651 1652 /* 1653 * Exempt only specific privileges from the LOMAC integrity policy. 1654 */ 1655 switch (priv) { 1656 case PRIV_KTRACE: 1657 case PRIV_MSGBUF: 1658 1659 /* 1660 * Allow processes to manipulate basic process audit properties, and 1661 * to submit audit records. 1662 */ 1663 case PRIV_AUDIT_GETAUDIT: 1664 case PRIV_AUDIT_SETAUDIT: 1665 case PRIV_AUDIT_SUBMIT: 1666 1667 /* 1668 * Allow processes to manipulate their regular UNIX credentials. 1669 */ 1670 case PRIV_CRED_SETUID: 1671 case PRIV_CRED_SETEUID: 1672 case PRIV_CRED_SETGID: 1673 case PRIV_CRED_SETEGID: 1674 case PRIV_CRED_SETGROUPS: 1675 case PRIV_CRED_SETREUID: 1676 case PRIV_CRED_SETREGID: 1677 case PRIV_CRED_SETRESUID: 1678 case PRIV_CRED_SETRESGID: 1679 1680 /* 1681 * Allow processes to perform system monitoring. 1682 */ 1683 case PRIV_SEEOTHERGIDS: 1684 case PRIV_SEEOTHERUIDS: 1685 break; 1686 1687 /* 1688 * Allow access to general process debugging facilities. We 1689 * separately control debugging based on MAC label. 1690 */ 1691 case PRIV_DEBUG_DIFFCRED: 1692 case PRIV_DEBUG_SUGID: 1693 case PRIV_DEBUG_UNPRIV: 1694 1695 /* 1696 * Allow manipulating jails. 1697 */ 1698 case PRIV_JAIL_ATTACH: 1699 1700 /* 1701 * Allow privilege with respect to the Partition policy, but not the 1702 * Privs policy. 1703 */ 1704 case PRIV_MAC_PARTITION: 1705 1706 /* 1707 * Allow privilege with respect to process resource limits and login 1708 * context. 1709 */ 1710 case PRIV_PROC_LIMIT: 1711 case PRIV_PROC_SETLOGIN: 1712 case PRIV_PROC_SETRLIMIT: 1713 1714 /* 1715 * Allow System V and POSIX IPC privileges. 1716 */ 1717 case PRIV_IPC_READ: 1718 case PRIV_IPC_WRITE: 1719 case PRIV_IPC_ADMIN: 1720 case PRIV_IPC_MSGSIZE: 1721 case PRIV_MQ_ADMIN: 1722 1723 /* 1724 * Allow certain scheduler manipulations -- possibly this should be 1725 * controlled by more fine-grained policy, as potentially low 1726 * integrity processes can deny CPU to higher integrity ones. 1727 */ 1728 case PRIV_SCHED_DIFFCRED: 1729 case PRIV_SCHED_SETPRIORITY: 1730 case PRIV_SCHED_RTPRIO: 1731 case PRIV_SCHED_SETPOLICY: 1732 case PRIV_SCHED_SET: 1733 case PRIV_SCHED_SETPARAM: 1734 1735 /* 1736 * More IPC privileges. 1737 */ 1738 case PRIV_SEM_WRITE: 1739 1740 /* 1741 * Allow signaling privileges subject to integrity policy. 1742 */ 1743 case PRIV_SIGNAL_DIFFCRED: 1744 case PRIV_SIGNAL_SUGID: 1745 1746 /* 1747 * Allow access to only limited sysctls from lower integrity levels; 1748 * piggy-back on the Jail definition. 1749 */ 1750 case PRIV_SYSCTL_WRITEJAIL: 1751 1752 /* 1753 * Allow TTY-based privileges, subject to general device access using 1754 * labels on TTY device nodes, but not console privilege. 1755 */ 1756 case PRIV_TTY_DRAINWAIT: 1757 case PRIV_TTY_DTRWAIT: 1758 case PRIV_TTY_EXCLUSIVE: 1759 case PRIV_TTY_PRISON: 1760 case PRIV_TTY_STI: 1761 case PRIV_TTY_SETA: 1762 1763 /* 1764 * Grant most VFS privileges, as almost all are in practice bounded 1765 * by more specific checks using labels. 1766 */ 1767 case PRIV_VFS_READ: 1768 case PRIV_VFS_WRITE: 1769 case PRIV_VFS_ADMIN: 1770 case PRIV_VFS_EXEC: 1771 case PRIV_VFS_LOOKUP: 1772 case PRIV_VFS_CHFLAGS_DEV: 1773 case PRIV_VFS_CHOWN: 1774 case PRIV_VFS_CHROOT: 1775 case PRIV_VFS_RETAINSUGID: 1776 case PRIV_VFS_EXCEEDQUOTA: 1777 case PRIV_VFS_FCHROOT: 1778 case PRIV_VFS_FHOPEN: 1779 case PRIV_VFS_FHSTATFS: 1780 case PRIV_VFS_GENERATION: 1781 case PRIV_VFS_GETFH: 1782 case PRIV_VFS_GETQUOTA: 1783 case PRIV_VFS_LINK: 1784 case PRIV_VFS_MOUNT: 1785 case PRIV_VFS_MOUNT_OWNER: 1786 case PRIV_VFS_MOUNT_PERM: 1787 case PRIV_VFS_MOUNT_SUIDDIR: 1788 case PRIV_VFS_MOUNT_NONUSER: 1789 case PRIV_VFS_SETGID: 1790 case PRIV_VFS_STICKYFILE: 1791 case PRIV_VFS_SYSFLAGS: 1792 case PRIV_VFS_UNMOUNT: 1793 1794 /* 1795 * Allow VM privileges; it would be nice if these were subject to 1796 * resource limits. 1797 */ 1798 case PRIV_VM_MADV_PROTECT: 1799 case PRIV_VM_MLOCK: 1800 case PRIV_VM_MUNLOCK: 1801 1802 /* 1803 * Allow some but not all network privileges. In general, dont allow 1804 * reconfiguring the network stack, just normal use. 1805 */ 1806 case PRIV_NETATALK_RESERVEDPORT: 1807 case PRIV_NETINET_RESERVEDPORT: 1808 case PRIV_NETINET_RAW: 1809 case PRIV_NETINET_REUSEPORT: 1810 case PRIV_NETIPX_RESERVEDPORT: 1811 case PRIV_NETIPX_RAW: 1812 break; 1813 1814 /* 1815 * All remaining system privileges are allow only if the process 1816 * holds privilege with respect to the LOMAC policy. 1817 */ 1818 default: 1819 subj = SLOT(cred->cr_label); 1820 error = lomac_subject_privileged(subj); 1821 if (error) 1822 return (error); 1823 } 1824 return (0); 1825} 1826 1827static int 1828lomac_proc_check_debug(struct ucred *cred, struct proc *p) 1829{ 1830 struct mac_lomac *subj, *obj; 1831 1832 if (!lomac_enabled) 1833 return (0); 1834 1835 subj = SLOT(cred->cr_label); 1836 obj = SLOT(p->p_ucred->cr_label); 1837 1838 /* XXX: range checks */ 1839 if (!lomac_dominate_single(obj, subj)) 1840 return (ESRCH); 1841 if (!lomac_subject_dominate(subj, obj)) 1842 return (EACCES); 1843 1844 return (0); 1845} 1846 1847static int 1848lomac_proc_check_sched(struct ucred *cred, struct proc *p) 1849{ 1850 struct mac_lomac *subj, *obj; 1851 1852 if (!lomac_enabled) 1853 return (0); 1854 1855 subj = SLOT(cred->cr_label); 1856 obj = SLOT(p->p_ucred->cr_label); 1857 1858 /* XXX: range checks */ 1859 if (!lomac_dominate_single(obj, subj)) 1860 return (ESRCH); 1861 if (!lomac_subject_dominate(subj, obj)) 1862 return (EACCES); 1863 1864 return (0); 1865} 1866 1867static int 1868lomac_proc_check_signal(struct ucred *cred, struct proc *p, int signum) 1869{ 1870 struct mac_lomac *subj, *obj; 1871 1872 if (!lomac_enabled) 1873 return (0); 1874 1875 subj = SLOT(cred->cr_label); 1876 obj = SLOT(p->p_ucred->cr_label); 1877 1878 /* XXX: range checks */ 1879 if (!lomac_dominate_single(obj, subj)) 1880 return (ESRCH); 1881 if (!lomac_subject_dominate(subj, obj)) 1882 return (EACCES); 1883 1884 return (0); 1885} 1886 1887static void 1888lomac_proc_create_init(struct ucred *cred) 1889{ 1890 struct mac_lomac *dest; 1891 1892 dest = SLOT(cred->cr_label); 1893 1894 lomac_set_single(dest, MAC_LOMAC_TYPE_HIGH, 0); 1895 lomac_set_range(dest, MAC_LOMAC_TYPE_LOW, 0, MAC_LOMAC_TYPE_HIGH, 0); 1896} 1897 1898static void 1899lomac_proc_create_swapper(struct ucred *cred) 1900{ 1901 struct mac_lomac *dest; 1902 1903 dest = SLOT(cred->cr_label); 1904 1905 lomac_set_single(dest, MAC_LOMAC_TYPE_EQUAL, 0); 1906 lomac_set_range(dest, MAC_LOMAC_TYPE_LOW, 0, MAC_LOMAC_TYPE_HIGH, 0); 1907} 1908 1909static void 1910lomac_proc_destroy_label(struct label *label) 1911{ 1912 1913 mtx_destroy(&PSLOT(label)->mtx); 1914 free(PSLOT(label), M_LOMAC); 1915 PSLOT_SET(label, NULL); 1916} 1917 1918static void 1919lomac_proc_init_label(struct label *label) 1920{ 1921 1922 PSLOT_SET(label, malloc(sizeof(struct mac_lomac_proc), M_LOMAC, 1923 M_ZERO | M_WAITOK)); 1924 mtx_init(&PSLOT(label)->mtx, "MAC/Lomac proc lock", NULL, MTX_DEF); 1925} 1926 1927static int 1928lomac_socket_check_deliver(struct socket *so, struct label *solabel, 1929 struct mbuf *m, struct label *mlabel) 1930{ 1931 struct mac_lomac *p, *s; 1932 1933 if (!lomac_enabled) 1934 return (0); 1935 1936 p = SLOT(mlabel); 1937 s = SLOT(solabel); 1938 1939 return (lomac_equal_single(p, s) ? 0 : EACCES); 1940} 1941 1942static int 1943lomac_socket_check_relabel(struct ucred *cred, struct socket *so, 1944 struct label *solabel, struct label *newlabel) 1945{ 1946 struct mac_lomac *subj, *obj, *new; 1947 int error; 1948 1949 new = SLOT(newlabel); 1950 subj = SLOT(cred->cr_label); 1951 obj = SLOT(solabel); 1952 1953 /* 1954 * If there is a LOMAC label update for the socket, it may be an 1955 * update of single. 1956 */ 1957 error = lomac_atmostflags(new, MAC_LOMAC_FLAG_SINGLE); 1958 if (error) 1959 return (error); 1960 1961 /* 1962 * To relabel a socket, the old socket single must be in the subject 1963 * range. 1964 */ 1965 if (!lomac_single_in_range(obj, subj)) 1966 return (EPERM); 1967 1968 /* 1969 * If the LOMAC label is to be changed, authorize as appropriate. 1970 */ 1971 if (new->ml_flags & MAC_LOMAC_FLAG_SINGLE) { 1972 /* 1973 * To relabel a socket, the new socket single must be in the 1974 * subject range. 1975 */ 1976 if (!lomac_single_in_range(new, subj)) 1977 return (EPERM); 1978 1979 /* 1980 * To change the LOMAC label on the socket to contain EQUAL, 1981 * the subject must have appropriate privilege. 1982 */ 1983 if (lomac_contains_equal(new)) { 1984 error = lomac_subject_privileged(subj); 1985 if (error) 1986 return (error); 1987 } 1988 } 1989 1990 return (0); 1991} 1992 1993static int 1994lomac_socket_check_visible(struct ucred *cred, struct socket *so, 1995 struct label *solabel) 1996{ 1997 struct mac_lomac *subj, *obj; 1998 1999 if (!lomac_enabled) 2000 return (0); 2001 2002 subj = SLOT(cred->cr_label); 2003 obj = SLOT(solabel); 2004 2005 if (!lomac_dominate_single(obj, subj)) 2006 return (ENOENT); 2007 2008 return (0); 2009} 2010 2011static void 2012lomac_socket_create(struct ucred *cred, struct socket *so, 2013 struct label *solabel) 2014{ 2015 struct mac_lomac *source, *dest; 2016 2017 source = SLOT(cred->cr_label); 2018 dest = SLOT(solabel); 2019 2020 lomac_copy_single(source, dest); 2021} 2022 2023static void 2024lomac_socket_create_mbuf(struct socket *so, struct label *solabel, 2025 struct mbuf *m, struct label *mlabel) 2026{ 2027 struct mac_lomac *source, *dest; 2028 2029 source = SLOT(solabel); 2030 dest = SLOT(mlabel); 2031 2032 lomac_copy_single(source, dest); 2033} 2034 2035static void 2036lomac_socket_newconn(struct socket *oldso, struct label *oldsolabel, 2037 struct socket *newso, struct label *newsolabel) 2038{ 2039 struct mac_lomac *source, *dest; 2040 2041 source = SLOT(oldsolabel); 2042 dest = SLOT(newsolabel); 2043 2044 lomac_copy_single(source, dest); 2045} 2046 2047static void 2048lomac_socket_relabel(struct ucred *cred, struct socket *so, 2049 struct label *solabel, struct label *newlabel) 2050{ 2051 struct mac_lomac *source, *dest; 2052 2053 source = SLOT(newlabel); 2054 dest = SLOT(solabel); 2055 2056 try_relabel(source, dest); 2057} 2058 2059static void 2060lomac_socketpeer_set_from_mbuf(struct mbuf *m, struct label *mlabel, 2061 struct socket *so, struct label *sopeerlabel) 2062{ 2063 struct mac_lomac *source, *dest; 2064 2065 source = SLOT(mlabel); 2066 dest = SLOT(sopeerlabel); 2067 2068 lomac_copy_single(source, dest); 2069} 2070 2071static void 2072lomac_socketpeer_set_from_socket(struct socket *oldso, 2073 struct label *oldsolabel, struct socket *newso, 2074 struct label *newsopeerlabel) 2075{ 2076 struct mac_lomac *source, *dest; 2077 2078 source = SLOT(oldsolabel); 2079 dest = SLOT(newsopeerlabel); 2080 2081 lomac_copy_single(source, dest); 2082} 2083 2084static void 2085lomac_syncache_create(struct label *label, struct inpcb *inp) 2086{ 2087 struct mac_lomac *source, *dest; 2088 2089 source = SLOT(inp->inp_label); 2090 dest = SLOT(label); 2091 lomac_copy(source, dest); 2092} 2093 2094static void 2095lomac_syncache_create_mbuf(struct label *sc_label, struct mbuf *m, 2096 struct label *mlabel) 2097{ 2098 struct mac_lomac *source, *dest; 2099 2100 source = SLOT(sc_label); 2101 dest = SLOT(mlabel); 2102 lomac_copy(source, dest); 2103} 2104 2105static int 2106lomac_system_check_acct(struct ucred *cred, struct vnode *vp, 2107 struct label *vplabel) 2108{ 2109 struct mac_lomac *subj, *obj; 2110 2111 if (!lomac_enabled) 2112 return (0); 2113 2114 subj = SLOT(cred->cr_label); 2115 obj = SLOT(vplabel); 2116 2117 if (lomac_subject_privileged(subj)) 2118 return (EPERM); 2119 2120 if (!lomac_high_single(obj)) 2121 return (EACCES); 2122 2123 return (0); 2124} 2125 2126static int 2127lomac_system_check_auditctl(struct ucred *cred, struct vnode *vp, 2128 struct label *vplabel) 2129{ 2130 struct mac_lomac *subj, *obj; 2131 2132 if (!lomac_enabled) 2133 return (0); 2134 2135 subj = SLOT(cred->cr_label); 2136 obj = SLOT(vplabel); 2137 2138 if (lomac_subject_privileged(subj)) 2139 return (EPERM); 2140 2141 if (!lomac_high_single(obj)) 2142 return (EACCES); 2143 2144 return (0); 2145} 2146 2147static int 2148lomac_system_check_swapoff(struct ucred *cred, struct vnode *vp, 2149 struct label *vplabel) 2150{ 2151 struct mac_lomac *subj; 2152 2153 if (!lomac_enabled) 2154 return (0); 2155 2156 subj = SLOT(cred->cr_label); 2157 2158 if (lomac_subject_privileged(subj)) 2159 return (EPERM); 2160 2161 return (0); 2162} 2163 2164static int 2165lomac_system_check_swapon(struct ucred *cred, struct vnode *vp, 2166 struct label *vplabel) 2167{ 2168 struct mac_lomac *subj, *obj; 2169 2170 if (!lomac_enabled) 2171 return (0); 2172 2173 subj = SLOT(cred->cr_label); 2174 obj = SLOT(vplabel); 2175 2176 if (lomac_subject_privileged(subj)) 2177 return (EPERM); 2178 2179 if (!lomac_high_single(obj)) 2180 return (EACCES); 2181 2182 return (0); 2183} 2184 2185static int 2186lomac_system_check_sysctl(struct ucred *cred, struct sysctl_oid *oidp, 2187 void *arg1, int arg2, struct sysctl_req *req) 2188{ 2189 struct mac_lomac *subj; 2190 2191 if (!lomac_enabled) 2192 return (0); 2193 2194 subj = SLOT(cred->cr_label); 2195 2196 /* 2197 * Treat sysctl variables without CTLFLAG_ANYBODY flag as lomac/high, 2198 * but also require privilege to change them. 2199 */ 2200 if (req->newptr != NULL && (oidp->oid_kind & CTLFLAG_ANYBODY) == 0) { 2201#ifdef notdef 2202 if (!lomac_subject_dominate_high(subj)) 2203 return (EACCES); 2204#endif 2205 2206 if (lomac_subject_privileged(subj)) 2207 return (EPERM); 2208 } 2209 2210 return (0); 2211} 2212 2213static void 2214lomac_thread_userret(struct thread *td) 2215{ 2216 struct proc *p = td->td_proc; 2217 struct mac_lomac_proc *subj = PSLOT(p->p_label); 2218 struct ucred *newcred, *oldcred; 2219 int dodrop; 2220 2221 mtx_lock(&subj->mtx); 2222 if (subj->mac_lomac.ml_flags & MAC_LOMAC_FLAG_UPDATE) { 2223 dodrop = 0; 2224 mtx_unlock(&subj->mtx); 2225 newcred = crget(); 2226 /* 2227 * Prevent a lock order reversal in 2228 * mac_cred_mmapped_drop_perms; ideally, the other user of 2229 * subj->mtx wouldn't be holding Giant. 2230 */ 2231 mtx_lock(&Giant); 2232 PROC_LOCK(p); 2233 mtx_lock(&subj->mtx); 2234 /* 2235 * Check if we lost the race while allocating the cred. 2236 */ 2237 if ((subj->mac_lomac.ml_flags & MAC_LOMAC_FLAG_UPDATE) == 0) { 2238 crfree(newcred); 2239 goto out; 2240 } 2241 oldcred = p->p_ucred; 2242 crcopy(newcred, oldcred); 2243 crhold(newcred); 2244 lomac_copy(&subj->mac_lomac, SLOT(newcred->cr_label)); 2245 p->p_ucred = newcred; 2246 crfree(oldcred); 2247 dodrop = 1; 2248 out: 2249 mtx_unlock(&subj->mtx); 2250 PROC_UNLOCK(p); 2251 if (dodrop) 2252 mac_cred_mmapped_drop_perms(curthread, newcred); 2253 mtx_unlock(&Giant); 2254 } else { 2255 mtx_unlock(&subj->mtx); 2256 } 2257} 2258 2259static int 2260lomac_vnode_associate_extattr(struct mount *mp, struct label *mplabel, 2261 struct vnode *vp, struct label *vplabel) 2262{ 2263 struct mac_lomac ml_temp, *source, *dest; 2264 int buflen, error; 2265 2266 source = SLOT(mplabel); 2267 dest = SLOT(vplabel); 2268 2269 buflen = sizeof(ml_temp); 2270 bzero(&ml_temp, buflen); 2271 2272 error = vn_extattr_get(vp, IO_NODELOCKED, MAC_LOMAC_EXTATTR_NAMESPACE, 2273 MAC_LOMAC_EXTATTR_NAME, &buflen, (char *)&ml_temp, curthread); 2274 if (error == ENOATTR || error == EOPNOTSUPP) { 2275 /* Fall back to the mntlabel. */ 2276 lomac_copy_single(source, dest); 2277 return (0); 2278 } else if (error) 2279 return (error); 2280 2281 if (buflen != sizeof(ml_temp)) { 2282 if (buflen != sizeof(ml_temp) - sizeof(ml_temp.ml_auxsingle)) { 2283 printf("lomac_vnode_associate_extattr: bad size %d\n", 2284 buflen); 2285 return (EPERM); 2286 } 2287 bzero(&ml_temp.ml_auxsingle, sizeof(ml_temp.ml_auxsingle)); 2288 buflen = sizeof(ml_temp); 2289 (void)vn_extattr_set(vp, IO_NODELOCKED, 2290 MAC_LOMAC_EXTATTR_NAMESPACE, MAC_LOMAC_EXTATTR_NAME, 2291 buflen, (char *)&ml_temp, curthread); 2292 } 2293 if (lomac_valid(&ml_temp) != 0) { 2294 printf("lomac_vnode_associate_extattr: invalid\n"); 2295 return (EPERM); 2296 } 2297 if ((ml_temp.ml_flags & MAC_LOMAC_FLAGS_BOTH) != 2298 MAC_LOMAC_FLAG_SINGLE) { 2299 printf("lomac_vnode_associate_extattr: not single\n"); 2300 return (EPERM); 2301 } 2302 2303 lomac_copy_single(&ml_temp, dest); 2304 return (0); 2305} 2306 2307static void 2308lomac_vnode_associate_singlelabel(struct mount *mp, struct label *mplabel, 2309 struct vnode *vp, struct label *vplabel) 2310{ 2311 struct mac_lomac *source, *dest; 2312 2313 source = SLOT(mplabel); 2314 dest = SLOT(vplabel); 2315 2316 lomac_copy_single(source, dest); 2317} 2318 2319static int 2320lomac_vnode_check_create(struct ucred *cred, struct vnode *dvp, 2321 struct label *dvplabel, struct componentname *cnp, struct vattr *vap) 2322{ 2323 struct mac_lomac *subj, *obj; 2324 2325 if (!lomac_enabled) 2326 return (0); 2327 2328 subj = SLOT(cred->cr_label); 2329 obj = SLOT(dvplabel); 2330 2331 if (!lomac_subject_dominate(subj, obj)) 2332 return (EACCES); 2333 if (obj->ml_flags & MAC_LOMAC_FLAG_AUX && 2334 !lomac_dominate_element(&subj->ml_single, &obj->ml_auxsingle)) 2335 return (EACCES); 2336 2337 return (0); 2338} 2339 2340static int 2341lomac_vnode_check_deleteacl(struct ucred *cred, struct vnode *vp, 2342 struct label *vplabel, acl_type_t type) 2343{ 2344 struct mac_lomac *subj, *obj; 2345 2346 if (!lomac_enabled) 2347 return (0); 2348 2349 subj = SLOT(cred->cr_label); 2350 obj = SLOT(vplabel); 2351 2352 if (!lomac_subject_dominate(subj, obj)) 2353 return (EACCES); 2354 2355 return (0); 2356} 2357 2358static int 2359lomac_vnode_check_link(struct ucred *cred, struct vnode *dvp, 2360 struct label *dvplabel, struct vnode *vp, struct label *vplabel, 2361 struct componentname *cnp) 2362{ 2363 struct mac_lomac *subj, *obj; 2364 2365 if (!lomac_enabled) 2366 return (0); 2367 2368 subj = SLOT(cred->cr_label); 2369 obj = SLOT(dvplabel); 2370 2371 if (!lomac_subject_dominate(subj, obj)) 2372 return (EACCES); 2373 2374 obj = SLOT(vplabel); 2375 2376 if (!lomac_subject_dominate(subj, obj)) 2377 return (EACCES); 2378 2379 return (0); 2380} 2381 2382static int 2383lomac_vnode_check_mmap(struct ucred *cred, struct vnode *vp, 2384 struct label *vplabel, int prot, int flags) 2385{ 2386 struct mac_lomac *subj, *obj; 2387 2388 /* 2389 * Rely on the use of open()-time protections to handle 2390 * non-revocation cases. 2391 */ 2392 if (!lomac_enabled) 2393 return (0); 2394 2395 subj = SLOT(cred->cr_label); 2396 obj = SLOT(vplabel); 2397 2398 if (((prot & VM_PROT_WRITE) != 0) && ((flags & MAP_SHARED) != 0)) { 2399 if (!lomac_subject_dominate(subj, obj)) 2400 return (EACCES); 2401 } 2402 if (prot & (VM_PROT_READ | VM_PROT_EXECUTE)) { 2403 if (!lomac_dominate_single(obj, subj)) 2404 return (maybe_demote(subj, obj, "mapping", "file", vp)); 2405 } 2406 2407 return (0); 2408} 2409 2410static void 2411lomac_vnode_check_mmap_downgrade(struct ucred *cred, struct vnode *vp, 2412 struct label *vplabel, /* XXX vm_prot_t */ int *prot) 2413{ 2414 struct mac_lomac *subj, *obj; 2415 2416 /* 2417 * Rely on the use of open()-time protections to handle 2418 * non-revocation cases. 2419 */ 2420 if (!lomac_enabled || !revocation_enabled) 2421 return; 2422 2423 subj = SLOT(cred->cr_label); 2424 obj = SLOT(vplabel); 2425 2426 if (!lomac_subject_dominate(subj, obj)) 2427 *prot &= ~VM_PROT_WRITE; 2428} 2429 2430static int 2431lomac_vnode_check_open(struct ucred *cred, struct vnode *vp, 2432 struct label *vplabel, int acc_mode) 2433{ 2434 struct mac_lomac *subj, *obj; 2435 2436 if (!lomac_enabled) 2437 return (0); 2438 2439 subj = SLOT(cred->cr_label); 2440 obj = SLOT(vplabel); 2441 2442 /* XXX privilege override for admin? */ 2443 if (acc_mode & (VWRITE | VAPPEND | VADMIN)) { 2444 if (!lomac_subject_dominate(subj, obj)) 2445 return (EACCES); 2446 } 2447 2448 return (0); 2449} 2450 2451static int 2452lomac_vnode_check_read(struct ucred *active_cred, struct ucred *file_cred, 2453 struct vnode *vp, struct label *vplabel) 2454{ 2455 struct mac_lomac *subj, *obj; 2456 2457 if (!lomac_enabled || !revocation_enabled) 2458 return (0); 2459 2460 subj = SLOT(active_cred->cr_label); 2461 obj = SLOT(vplabel); 2462 2463 if (!lomac_dominate_single(obj, subj)) 2464 return (maybe_demote(subj, obj, "reading", "file", vp)); 2465 2466 return (0); 2467} 2468 2469static int 2470lomac_vnode_check_relabel(struct ucred *cred, struct vnode *vp, 2471 struct label *vplabel, struct label *newlabel) 2472{ 2473 struct mac_lomac *old, *new, *subj; 2474 int error; 2475 2476 old = SLOT(vplabel); 2477 new = SLOT(newlabel); 2478 subj = SLOT(cred->cr_label); 2479 2480 /* 2481 * If there is a LOMAC label update for the vnode, it must be a 2482 * single label, with an optional explicit auxiliary single. 2483 */ 2484 error = lomac_atmostflags(new, 2485 MAC_LOMAC_FLAG_SINGLE | MAC_LOMAC_FLAG_AUX); 2486 if (error) 2487 return (error); 2488 2489 /* 2490 * To perform a relabel of the vnode (LOMAC label or not), LOMAC must 2491 * authorize the relabel. 2492 */ 2493 if (!lomac_single_in_range(old, subj)) 2494 return (EPERM); 2495 2496 /* 2497 * If the LOMAC label is to be changed, authorize as appropriate. 2498 */ 2499 if (new->ml_flags & MAC_LOMAC_FLAG_SINGLE) { 2500 /* 2501 * To change the LOMAC label on a vnode, the new vnode label 2502 * must be in the subject range. 2503 */ 2504 if (!lomac_single_in_range(new, subj)) 2505 return (EPERM); 2506 2507 /* 2508 * To change the LOMAC label on the vnode to be EQUAL, the 2509 * subject must have appropriate privilege. 2510 */ 2511 if (lomac_contains_equal(new)) { 2512 error = lomac_subject_privileged(subj); 2513 if (error) 2514 return (error); 2515 } 2516 } 2517 if (new->ml_flags & MAC_LOMAC_FLAG_AUX) { 2518 /* 2519 * Fill in the missing parts from the previous label. 2520 */ 2521 if ((new->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0) 2522 lomac_copy_single(subj, new); 2523 2524 /* 2525 * To change the auxiliary LOMAC label on a vnode, the new 2526 * vnode label must be in the subject range. 2527 */ 2528 if (!lomac_auxsingle_in_range(new, subj)) 2529 return (EPERM); 2530 2531 /* 2532 * To change the auxiliary LOMAC label on the vnode to be 2533 * EQUAL, the subject must have appropriate privilege. 2534 */ 2535 if (lomac_contains_equal(new)) { 2536 error = lomac_subject_privileged(subj); 2537 if (error) 2538 return (error); 2539 } 2540 } 2541 2542 return (0); 2543} 2544 2545static int 2546lomac_vnode_check_rename_from(struct ucred *cred, struct vnode *dvp, 2547 struct label *dvplabel, struct vnode *vp, struct label *vplabel, 2548 struct componentname *cnp) 2549{ 2550 struct mac_lomac *subj, *obj; 2551 2552 if (!lomac_enabled) 2553 return (0); 2554 2555 subj = SLOT(cred->cr_label); 2556 obj = SLOT(dvplabel); 2557 2558 if (!lomac_subject_dominate(subj, obj)) 2559 return (EACCES); 2560 2561 obj = SLOT(vplabel); 2562 2563 if (!lomac_subject_dominate(subj, obj)) 2564 return (EACCES); 2565 2566 return (0); 2567} 2568 2569static int 2570lomac_vnode_check_rename_to(struct ucred *cred, struct vnode *dvp, 2571 struct label *dvplabel, struct vnode *vp, struct label *vplabel, 2572 int samedir, struct componentname *cnp) 2573{ 2574 struct mac_lomac *subj, *obj; 2575 2576 if (!lomac_enabled) 2577 return (0); 2578 2579 subj = SLOT(cred->cr_label); 2580 obj = SLOT(dvplabel); 2581 2582 if (!lomac_subject_dominate(subj, obj)) 2583 return (EACCES); 2584 2585 if (vp != NULL) { 2586 obj = SLOT(vplabel); 2587 2588 if (!lomac_subject_dominate(subj, obj)) 2589 return (EACCES); 2590 } 2591 2592 return (0); 2593} 2594 2595static int 2596lomac_vnode_check_revoke(struct ucred *cred, struct vnode *vp, 2597 struct label *vplabel) 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(vplabel); 2606 2607 if (!lomac_subject_dominate(subj, obj)) 2608 return (EACCES); 2609 2610 return (0); 2611} 2612 2613static int 2614lomac_vnode_check_setacl(struct ucred *cred, struct vnode *vp, 2615 struct label *vplabel, acl_type_t type, struct acl *acl) 2616{ 2617 struct mac_lomac *subj, *obj; 2618 2619 if (!lomac_enabled) 2620 return (0); 2621 2622 subj = SLOT(cred->cr_label); 2623 obj = SLOT(vplabel); 2624 2625 if (!lomac_subject_dominate(subj, obj)) 2626 return (EACCES); 2627 2628 return (0); 2629} 2630 2631static int 2632lomac_vnode_check_setextattr(struct ucred *cred, struct vnode *vp, 2633 struct label *vplabel, int attrnamespace, const char *name, 2634 struct uio *uio) 2635{ 2636 struct mac_lomac *subj, *obj; 2637 2638 if (!lomac_enabled) 2639 return (0); 2640 2641 subj = SLOT(cred->cr_label); 2642 obj = SLOT(vplabel); 2643 2644 if (!lomac_subject_dominate(subj, obj)) 2645 return (EACCES); 2646 2647 /* XXX: protect the MAC EA in a special way? */ 2648 2649 return (0); 2650} 2651 2652static int 2653lomac_vnode_check_setflags(struct ucred *cred, struct vnode *vp, 2654 struct label *vplabel, u_long flags) 2655{ 2656 struct mac_lomac *subj, *obj; 2657 2658 if (!lomac_enabled) 2659 return (0); 2660 2661 subj = SLOT(cred->cr_label); 2662 obj = SLOT(vplabel); 2663 2664 if (!lomac_subject_dominate(subj, obj)) 2665 return (EACCES); 2666 2667 return (0); 2668} 2669 2670static int 2671lomac_vnode_check_setmode(struct ucred *cred, struct vnode *vp, 2672 struct label *vplabel, mode_t mode) 2673{ 2674 struct mac_lomac *subj, *obj; 2675 2676 if (!lomac_enabled) 2677 return (0); 2678 2679 subj = SLOT(cred->cr_label); 2680 obj = SLOT(vplabel); 2681 2682 if (!lomac_subject_dominate(subj, obj)) 2683 return (EACCES); 2684 2685 return (0); 2686} 2687 2688static int 2689lomac_vnode_check_setowner(struct ucred *cred, struct vnode *vp, 2690 struct label *vplabel, uid_t uid, gid_t gid) 2691{ 2692 struct mac_lomac *subj, *obj; 2693 2694 if (!lomac_enabled) 2695 return (0); 2696 2697 subj = SLOT(cred->cr_label); 2698 obj = SLOT(vplabel); 2699 2700 if (!lomac_subject_dominate(subj, obj)) 2701 return (EACCES); 2702 2703 return (0); 2704} 2705 2706static int 2707lomac_vnode_check_setutimes(struct ucred *cred, struct vnode *vp, 2708 struct label *vplabel, struct timespec atime, struct timespec mtime) 2709{ 2710 struct mac_lomac *subj, *obj; 2711 2712 if (!lomac_enabled) 2713 return (0); 2714 2715 subj = SLOT(cred->cr_label); 2716 obj = SLOT(vplabel); 2717 2718 if (!lomac_subject_dominate(subj, obj)) 2719 return (EACCES); 2720 2721 return (0); 2722} 2723 2724static int 2725lomac_vnode_check_unlink(struct ucred *cred, struct vnode *dvp, 2726 struct label *dvplabel, struct vnode *vp, struct label *vplabel, 2727 struct componentname *cnp) 2728{ 2729 struct mac_lomac *subj, *obj; 2730 2731 if (!lomac_enabled) 2732 return (0); 2733 2734 subj = SLOT(cred->cr_label); 2735 obj = SLOT(dvplabel); 2736 2737 if (!lomac_subject_dominate(subj, obj)) 2738 return (EACCES); 2739 2740 obj = SLOT(vplabel); 2741 2742 if (!lomac_subject_dominate(subj, obj)) 2743 return (EACCES); 2744 2745 return (0); 2746} 2747 2748static int 2749lomac_vnode_check_write(struct ucred *active_cred, 2750 struct ucred *file_cred, struct vnode *vp, struct label *vplabel) 2751{ 2752 struct mac_lomac *subj, *obj; 2753 2754 if (!lomac_enabled || !revocation_enabled) 2755 return (0); 2756 2757 subj = SLOT(active_cred->cr_label); 2758 obj = SLOT(vplabel); 2759 2760 if (!lomac_subject_dominate(subj, obj)) 2761 return (EACCES); 2762 2763 return (0); 2764} 2765 2766static int 2767lomac_vnode_create_extattr(struct ucred *cred, struct mount *mp, 2768 struct label *mplabel, struct vnode *dvp, struct label *dvplabel, 2769 struct vnode *vp, struct label *vplabel, struct componentname *cnp) 2770{ 2771 struct mac_lomac *source, *dest, *dir, temp; 2772 size_t buflen; 2773 int error; 2774 2775 buflen = sizeof(temp); 2776 bzero(&temp, buflen); 2777 2778 source = SLOT(cred->cr_label); 2779 dest = SLOT(vplabel); 2780 dir = SLOT(dvplabel); 2781 if (dir->ml_flags & MAC_LOMAC_FLAG_AUX) { 2782 lomac_copy_auxsingle(dir, &temp); 2783 lomac_set_single(&temp, dir->ml_auxsingle.mle_type, 2784 dir->ml_auxsingle.mle_grade); 2785 } else { 2786 lomac_copy_single(source, &temp); 2787 } 2788 2789 error = vn_extattr_set(vp, IO_NODELOCKED, MAC_LOMAC_EXTATTR_NAMESPACE, 2790 MAC_LOMAC_EXTATTR_NAME, buflen, (char *)&temp, curthread); 2791 if (error == 0) 2792 lomac_copy(&temp, dest); 2793 return (error); 2794} 2795 2796static void 2797lomac_vnode_execve_transition(struct ucred *old, struct ucred *new, 2798 struct vnode *vp, struct label *vplabel, struct label *interpvplabel, 2799 struct image_params *imgp, struct label *execlabel) 2800{ 2801 struct mac_lomac *source, *dest, *obj, *robj; 2802 2803 source = SLOT(old->cr_label); 2804 dest = SLOT(new->cr_label); 2805 obj = SLOT(vplabel); 2806 robj = interpvplabel != NULL ? SLOT(interpvplabel) : obj; 2807 2808 lomac_copy(source, dest); 2809 /* 2810 * If there's an auxiliary label on the real object, respect it and 2811 * assume that this level should be assumed immediately if a higher 2812 * level is currently in place. 2813 */ 2814 if (robj->ml_flags & MAC_LOMAC_FLAG_AUX && 2815 !lomac_dominate_element(&robj->ml_auxsingle, &dest->ml_single) 2816 && lomac_auxsingle_in_range(robj, dest)) 2817 lomac_set_single(dest, robj->ml_auxsingle.mle_type, 2818 robj->ml_auxsingle.mle_grade); 2819 /* 2820 * Restructuring to use the execve transitioning mechanism instead of 2821 * the normal demotion mechanism here would be difficult, so just 2822 * copy the label over and perform standard demotion. This is also 2823 * non-optimal because it will result in the intermediate label "new" 2824 * being created and immediately recycled. 2825 */ 2826 if (lomac_enabled && revocation_enabled && 2827 !lomac_dominate_single(obj, source)) 2828 (void)maybe_demote(source, obj, "executing", "file", vp); 2829} 2830 2831static int 2832lomac_vnode_execve_will_transition(struct ucred *old, struct vnode *vp, 2833 struct label *vplabel, struct label *interpvplabel, 2834 struct image_params *imgp, struct label *execlabel) 2835{ 2836 struct mac_lomac *subj, *obj, *robj; 2837 2838 if (!lomac_enabled || !revocation_enabled) 2839 return (0); 2840 2841 subj = SLOT(old->cr_label); 2842 obj = SLOT(vplabel); 2843 robj = interpvplabel != NULL ? SLOT(interpvplabel) : obj; 2844 2845 return ((robj->ml_flags & MAC_LOMAC_FLAG_AUX && 2846 !lomac_dominate_element(&robj->ml_auxsingle, &subj->ml_single) 2847 && lomac_auxsingle_in_range(robj, subj)) || 2848 !lomac_dominate_single(obj, subj)); 2849} 2850 2851static void 2852lomac_vnode_relabel(struct ucred *cred, struct vnode *vp, 2853 struct label *vplabel, struct label *newlabel) 2854{ 2855 struct mac_lomac *source, *dest; 2856 2857 source = SLOT(newlabel); 2858 dest = SLOT(vplabel); 2859 2860 try_relabel(source, dest); 2861} 2862 2863static int 2864lomac_vnode_setlabel_extattr(struct ucred *cred, struct vnode *vp, 2865 struct label *vplabel, struct label *intlabel) 2866{ 2867 struct mac_lomac *source, temp; 2868 size_t buflen; 2869 int error; 2870 2871 buflen = sizeof(temp); 2872 bzero(&temp, buflen); 2873 2874 source = SLOT(intlabel); 2875 if ((source->ml_flags & MAC_LOMAC_FLAG_SINGLE) == 0) 2876 return (0); 2877 2878 lomac_copy_single(source, &temp); 2879 error = vn_extattr_set(vp, IO_NODELOCKED, MAC_LOMAC_EXTATTR_NAMESPACE, 2880 MAC_LOMAC_EXTATTR_NAME, buflen, (char *)&temp, curthread); 2881 return (error); 2882} 2883 2884static struct mac_policy_ops lomac_ops = 2885{ 2886 .mpo_init = lomac_init, 2887 2888 .mpo_bpfdesc_check_receive = lomac_bpfdesc_check_receive, 2889 .mpo_bpfdesc_create = lomac_bpfdesc_create, 2890 .mpo_bpfdesc_create_mbuf = lomac_bpfdesc_create_mbuf, 2891 .mpo_bpfdesc_destroy_label = lomac_destroy_label, 2892 .mpo_bpfdesc_init_label = lomac_init_label, 2893 2894 .mpo_cred_check_relabel = lomac_cred_check_relabel, 2895 .mpo_cred_check_visible = lomac_cred_check_visible, 2896 .mpo_cred_copy_label = lomac_copy_label, 2897 .mpo_cred_destroy_label = lomac_destroy_label, 2898 .mpo_cred_externalize_label = lomac_externalize_label, 2899 .mpo_cred_init_label = lomac_init_label, 2900 .mpo_cred_internalize_label = lomac_internalize_label, 2901 .mpo_cred_relabel = lomac_cred_relabel, 2902 2903 .mpo_devfs_create_device = lomac_devfs_create_device, 2904 .mpo_devfs_create_directory = lomac_devfs_create_directory, 2905 .mpo_devfs_create_symlink = lomac_devfs_create_symlink, 2906 .mpo_devfs_destroy_label = lomac_destroy_label, 2907 .mpo_devfs_init_label = lomac_init_label, 2908 .mpo_devfs_update = lomac_devfs_update, 2909 .mpo_devfs_vnode_associate = lomac_devfs_vnode_associate, 2910 2911 .mpo_ifnet_check_relabel = lomac_ifnet_check_relabel, 2912 .mpo_ifnet_check_transmit = lomac_ifnet_check_transmit, 2913 .mpo_ifnet_copy_label = lomac_copy_label, 2914 .mpo_ifnet_create = lomac_ifnet_create, 2915 .mpo_ifnet_create_mbuf = lomac_ifnet_create_mbuf, 2916 .mpo_ifnet_destroy_label = lomac_destroy_label, 2917 .mpo_ifnet_externalize_label = lomac_externalize_label, 2918 .mpo_ifnet_init_label = lomac_init_label, 2919 .mpo_ifnet_internalize_label = lomac_internalize_label, 2920 .mpo_ifnet_relabel = lomac_ifnet_relabel, 2921 2922 .mpo_syncache_create = lomac_syncache_create, 2923 .mpo_syncache_destroy_label = lomac_destroy_label, 2924 .mpo_syncache_init_label = lomac_init_label_waitcheck, 2925 2926 .mpo_inpcb_check_deliver = lomac_inpcb_check_deliver, 2927 .mpo_inpcb_check_visible = lomac_inpcb_check_visible, 2928 .mpo_inpcb_create = lomac_inpcb_create, 2929 .mpo_inpcb_create_mbuf = lomac_inpcb_create_mbuf, 2930 .mpo_inpcb_destroy_label = lomac_destroy_label, 2931 .mpo_inpcb_init_label = lomac_init_label_waitcheck, 2932 .mpo_inpcb_sosetlabel = lomac_inpcb_sosetlabel, 2933 2934 .mpo_ip6q_create = lomac_ip6q_create, 2935 .mpo_ip6q_destroy_label = lomac_destroy_label, 2936 .mpo_ip6q_init_label = lomac_init_label_waitcheck, 2937 .mpo_ip6q_match = lomac_ip6q_match, 2938 .mpo_ip6q_reassemble = lomac_ip6q_reassemble, 2939 .mpo_ip6q_update = lomac_ip6q_update, 2940 2941 .mpo_ipq_create = lomac_ipq_create, 2942 .mpo_ipq_destroy_label = lomac_destroy_label, 2943 .mpo_ipq_init_label = lomac_init_label_waitcheck, 2944 .mpo_ipq_match = lomac_ipq_match, 2945 .mpo_ipq_reassemble = lomac_ipq_reassemble, 2946 .mpo_ipq_update = lomac_ipq_update, 2947 2948 .mpo_kld_check_load = lomac_kld_check_load, 2949 2950 .mpo_mbuf_copy_label = lomac_copy_label, 2951 .mpo_mbuf_destroy_label = lomac_destroy_label, 2952 .mpo_mbuf_init_label = lomac_init_label_waitcheck, 2953 2954 .mpo_mount_create = lomac_mount_create, 2955 .mpo_mount_destroy_label = lomac_destroy_label, 2956 .mpo_mount_init_label = lomac_init_label, 2957 2958 .mpo_netatalk_aarp_send = lomac_netatalk_aarp_send, 2959 2960 .mpo_netinet_arp_send = lomac_netinet_arp_send, 2961 .mpo_netinet_firewall_reply = lomac_netinet_firewall_reply, 2962 .mpo_netinet_firewall_send = lomac_netinet_firewall_send, 2963 .mpo_netinet_fragment = lomac_netinet_fragment, 2964 .mpo_netinet_icmp_reply = lomac_netinet_icmp_reply, 2965 .mpo_netinet_igmp_send = lomac_netinet_igmp_send, 2966 2967 .mpo_netinet6_nd6_send = lomac_netinet6_nd6_send, 2968 2969 .mpo_pipe_check_ioctl = lomac_pipe_check_ioctl, 2970 .mpo_pipe_check_read = lomac_pipe_check_read, 2971 .mpo_pipe_check_relabel = lomac_pipe_check_relabel, 2972 .mpo_pipe_check_write = lomac_pipe_check_write, 2973 .mpo_pipe_copy_label = lomac_copy_label, 2974 .mpo_pipe_create = lomac_pipe_create, 2975 .mpo_pipe_destroy_label = lomac_destroy_label, 2976 .mpo_pipe_externalize_label = lomac_externalize_label, 2977 .mpo_pipe_init_label = lomac_init_label, 2978 .mpo_pipe_internalize_label = lomac_internalize_label, 2979 .mpo_pipe_relabel = lomac_pipe_relabel, 2980 2981 .mpo_priv_check = lomac_priv_check, 2982 2983 .mpo_proc_check_debug = lomac_proc_check_debug, 2984 .mpo_proc_check_sched = lomac_proc_check_sched, 2985 .mpo_proc_check_signal = lomac_proc_check_signal, 2986 .mpo_proc_create_swapper = lomac_proc_create_swapper, 2987 .mpo_proc_create_init = lomac_proc_create_init, 2988 .mpo_proc_destroy_label = lomac_proc_destroy_label, 2989 .mpo_proc_init_label = lomac_proc_init_label, 2990 2991 .mpo_socket_check_deliver = lomac_socket_check_deliver, 2992 .mpo_socket_check_relabel = lomac_socket_check_relabel, 2993 .mpo_socket_check_visible = lomac_socket_check_visible, 2994 .mpo_socket_copy_label = lomac_copy_label, 2995 .mpo_socket_create = lomac_socket_create, 2996 .mpo_socket_create_mbuf = lomac_socket_create_mbuf, 2997 .mpo_socket_destroy_label = lomac_destroy_label, 2998 .mpo_socket_externalize_label = lomac_externalize_label, 2999 .mpo_socket_init_label = lomac_init_label_waitcheck, 3000 .mpo_socket_internalize_label = lomac_internalize_label, 3001 .mpo_socket_newconn = lomac_socket_newconn, 3002 .mpo_socket_relabel = lomac_socket_relabel, 3003 3004 .mpo_socketpeer_destroy_label = lomac_destroy_label, 3005 .mpo_socketpeer_externalize_label = lomac_externalize_label, 3006 .mpo_socketpeer_init_label = lomac_init_label_waitcheck, 3007 .mpo_socketpeer_set_from_mbuf = lomac_socketpeer_set_from_mbuf, 3008 .mpo_socketpeer_set_from_socket = lomac_socketpeer_set_from_socket, 3009 3010 .mpo_syncache_create_mbuf = lomac_syncache_create_mbuf, 3011 3012 .mpo_system_check_acct = lomac_system_check_acct, 3013 .mpo_system_check_auditctl = lomac_system_check_auditctl, 3014 .mpo_system_check_swapoff = lomac_system_check_swapoff, 3015 .mpo_system_check_swapon = lomac_system_check_swapon, 3016 .mpo_system_check_sysctl = lomac_system_check_sysctl, 3017 3018 .mpo_thread_userret = lomac_thread_userret, 3019 3020 .mpo_vnode_associate_extattr = lomac_vnode_associate_extattr, 3021 .mpo_vnode_associate_singlelabel = lomac_vnode_associate_singlelabel, 3022 .mpo_vnode_check_access = lomac_vnode_check_open, 3023 .mpo_vnode_check_create = lomac_vnode_check_create, 3024 .mpo_vnode_check_deleteacl = lomac_vnode_check_deleteacl, 3025 .mpo_vnode_check_link = lomac_vnode_check_link, 3026 .mpo_vnode_check_mmap = lomac_vnode_check_mmap, 3027 .mpo_vnode_check_mmap_downgrade = lomac_vnode_check_mmap_downgrade, 3028 .mpo_vnode_check_open = lomac_vnode_check_open, 3029 .mpo_vnode_check_read = lomac_vnode_check_read, 3030 .mpo_vnode_check_relabel = lomac_vnode_check_relabel, 3031 .mpo_vnode_check_rename_from = lomac_vnode_check_rename_from, 3032 .mpo_vnode_check_rename_to = lomac_vnode_check_rename_to, 3033 .mpo_vnode_check_revoke = lomac_vnode_check_revoke, 3034 .mpo_vnode_check_setacl = lomac_vnode_check_setacl, 3035 .mpo_vnode_check_setextattr = lomac_vnode_check_setextattr, 3036 .mpo_vnode_check_setflags = lomac_vnode_check_setflags, 3037 .mpo_vnode_check_setmode = lomac_vnode_check_setmode, 3038 .mpo_vnode_check_setowner = lomac_vnode_check_setowner, 3039 .mpo_vnode_check_setutimes = lomac_vnode_check_setutimes, 3040 .mpo_vnode_check_unlink = lomac_vnode_check_unlink, 3041 .mpo_vnode_check_write = lomac_vnode_check_write, 3042 .mpo_vnode_copy_label = lomac_copy_label, 3043 .mpo_vnode_create_extattr = lomac_vnode_create_extattr, 3044 .mpo_vnode_destroy_label = lomac_destroy_label, 3045 .mpo_vnode_execve_transition = lomac_vnode_execve_transition, 3046 .mpo_vnode_execve_will_transition = lomac_vnode_execve_will_transition, 3047 .mpo_vnode_externalize_label = lomac_externalize_label, 3048 .mpo_vnode_init_label = lomac_init_label, 3049 .mpo_vnode_internalize_label = lomac_internalize_label, 3050 .mpo_vnode_relabel = lomac_vnode_relabel, 3051 .mpo_vnode_setlabel_extattr = lomac_vnode_setlabel_extattr, 3052}; 3053 3054#define LOMAC_OBJECTS (MPC_OBJECT_CRED | \ 3055 /* MPC_OBJECT_PROC | */ \ 3056 MPC_OBJECT_VNODE | \ 3057 MPC_OBJECT_INPCB | \ 3058 MPC_OBJECT_SOCKET | \ 3059 MPC_OBJECT_DEVFS | \ 3060 MPC_OBJECT_MBUF | \ 3061 MPC_OBJECT_IPQ | \ 3062 MPC_OBJECT_IFNET | \ 3063 MPC_OBJECT_BPFDESC | \ 3064 MPC_OBJECT_PIPE | \ 3065 MPC_OBJECT_MOUNT | \ 3066 /* MPC_OBJECT_POSIXSEM | */ \ 3067 /* MPC_OBJECT_POSIXSHM | */ \ 3068 /* MPC_OBJECT_SYSVMSG | */ \ 3069 /* MPC_OBJECT_SYSVMSQ | */ \ 3070 /* MPC_OBJECT_SYSVSEM | */ \ 3071 /* MPC_OBJECT_SYSVSHM | */ \ 3072 MPC_OBJECT_SYNCACHE) 3073 3074MAC_POLICY_SET(&lomac_ops, mac_lomac, "TrustedBSD MAC/LOMAC", 3075 MPC_LOADTIME_FLAG_NOTLATE, &lomac_slot, LOMAC_OBJECTS); 3076