mac_mls.c revision 193391
1/*- 2 * Copyright (c) 1999-2002, 2007-2009 Robert N. M. Watson 3 * Copyright (c) 2001-2005 McAfee, 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 McAfee 10 * Research, the Security Research Division of McAfee, 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_mls/mac_mls.c 193391 2009-06-03 18:46:28Z rwatson $ 39 */ 40 41/* 42 * Developed by the TrustedBSD Project. 43 * 44 * MLS fixed label mandatory confidentiality 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/ksem.h> 54#include <sys/mman.h> 55#include <sys/malloc.h> 56#include <sys/mount.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/pipe.h> 68#include <sys/sx.h> 69#include <sys/sysctl.h> 70#include <sys/msg.h> 71#include <sys/sem.h> 72#include <sys/shm.h> 73 74#include <fs/devfs/devfs.h> 75 76#include <net/bpfdesc.h> 77#include <net/if.h> 78#include <net/if_types.h> 79#include <net/if_var.h> 80 81#include <netinet/in.h> 82#include <netinet/in_pcb.h> 83#include <netinet/ip_var.h> 84 85#include <vm/uma.h> 86#include <vm/vm.h> 87 88#include <security/mac/mac_policy.h> 89#include <security/mac_mls/mac_mls.h> 90 91SYSCTL_DECL(_security_mac); 92 93SYSCTL_NODE(_security_mac, OID_AUTO, mls, CTLFLAG_RW, 0, 94 "TrustedBSD mac_mls policy controls"); 95 96static int mls_label_size = sizeof(struct mac_mls); 97SYSCTL_INT(_security_mac_mls, OID_AUTO, label_size, CTLFLAG_RD, 98 &mls_label_size, 0, "Size of struct mac_mls"); 99 100static int mls_enabled = 1; 101SYSCTL_INT(_security_mac_mls, OID_AUTO, enabled, CTLFLAG_RW, &mls_enabled, 0, 102 "Enforce MAC/MLS policy"); 103TUNABLE_INT("security.mac.mls.enabled", &mls_enabled); 104 105static int destroyed_not_inited; 106SYSCTL_INT(_security_mac_mls, OID_AUTO, destroyed_not_inited, CTLFLAG_RD, 107 &destroyed_not_inited, 0, "Count of labels destroyed but not inited"); 108 109static int ptys_equal = 0; 110SYSCTL_INT(_security_mac_mls, OID_AUTO, ptys_equal, CTLFLAG_RW, 111 &ptys_equal, 0, "Label pty devices as mls/equal on create"); 112TUNABLE_INT("security.mac.mls.ptys_equal", &ptys_equal); 113 114static int revocation_enabled = 0; 115SYSCTL_INT(_security_mac_mls, OID_AUTO, revocation_enabled, CTLFLAG_RW, 116 &revocation_enabled, 0, "Revoke access to objects on relabel"); 117TUNABLE_INT("security.mac.mls.revocation_enabled", &revocation_enabled); 118 119static int max_compartments = MAC_MLS_MAX_COMPARTMENTS; 120SYSCTL_INT(_security_mac_mls, OID_AUTO, max_compartments, CTLFLAG_RD, 121 &max_compartments, 0, "Maximum compartments the policy supports"); 122 123static int mls_slot; 124#define SLOT(l) ((struct mac_mls *)mac_label_get((l), mls_slot)) 125#define SLOT_SET(l, val) mac_label_set((l), mls_slot, (uintptr_t)(val)) 126 127static uma_zone_t zone_mls; 128 129static __inline int 130mls_bit_set_empty(u_char *set) { 131 int i; 132 133 for (i = 0; i < MAC_MLS_MAX_COMPARTMENTS >> 3; i++) 134 if (set[i] != 0) 135 return (0); 136 return (1); 137} 138 139static struct mac_mls * 140mls_alloc(int flag) 141{ 142 143 return (uma_zalloc(zone_mls, flag | M_ZERO)); 144} 145 146static void 147mls_free(struct mac_mls *mm) 148{ 149 150 if (mm != NULL) 151 uma_zfree(zone_mls, mm); 152 else 153 atomic_add_int(&destroyed_not_inited, 1); 154} 155 156static int 157mls_atmostflags(struct mac_mls *mm, int flags) 158{ 159 160 if ((mm->mm_flags & flags) != mm->mm_flags) 161 return (EINVAL); 162 return (0); 163} 164 165static int 166mls_dominate_element(struct mac_mls_element *a, struct mac_mls_element *b) 167{ 168 int bit; 169 170 switch (a->mme_type) { 171 case MAC_MLS_TYPE_EQUAL: 172 case MAC_MLS_TYPE_HIGH: 173 return (1); 174 175 case MAC_MLS_TYPE_LOW: 176 switch (b->mme_type) { 177 case MAC_MLS_TYPE_LEVEL: 178 case MAC_MLS_TYPE_HIGH: 179 return (0); 180 181 case MAC_MLS_TYPE_EQUAL: 182 case MAC_MLS_TYPE_LOW: 183 return (1); 184 185 default: 186 panic("mls_dominate_element: b->mme_type invalid"); 187 } 188 189 case MAC_MLS_TYPE_LEVEL: 190 switch (b->mme_type) { 191 case MAC_MLS_TYPE_EQUAL: 192 case MAC_MLS_TYPE_LOW: 193 return (1); 194 195 case MAC_MLS_TYPE_HIGH: 196 return (0); 197 198 case MAC_MLS_TYPE_LEVEL: 199 for (bit = 1; bit <= MAC_MLS_MAX_COMPARTMENTS; bit++) 200 if (!MAC_MLS_BIT_TEST(bit, 201 a->mme_compartments) && 202 MAC_MLS_BIT_TEST(bit, b->mme_compartments)) 203 return (0); 204 return (a->mme_level >= b->mme_level); 205 206 default: 207 panic("mls_dominate_element: b->mme_type invalid"); 208 } 209 210 default: 211 panic("mls_dominate_element: a->mme_type invalid"); 212 } 213 214 return (0); 215} 216 217static int 218mls_range_in_range(struct mac_mls *rangea, struct mac_mls *rangeb) 219{ 220 221 return (mls_dominate_element(&rangeb->mm_rangehigh, 222 &rangea->mm_rangehigh) && 223 mls_dominate_element(&rangea->mm_rangelow, 224 &rangeb->mm_rangelow)); 225} 226 227static int 228mls_effective_in_range(struct mac_mls *effective, struct mac_mls *range) 229{ 230 231 KASSERT((effective->mm_flags & MAC_MLS_FLAG_EFFECTIVE) != 0, 232 ("mls_effective_in_range: a not effective")); 233 KASSERT((range->mm_flags & MAC_MLS_FLAG_RANGE) != 0, 234 ("mls_effective_in_range: b not range")); 235 236 return (mls_dominate_element(&range->mm_rangehigh, 237 &effective->mm_effective) && 238 mls_dominate_element(&effective->mm_effective, 239 &range->mm_rangelow)); 240 241 return (1); 242} 243 244static int 245mls_dominate_effective(struct mac_mls *a, struct mac_mls *b) 246{ 247 KASSERT((a->mm_flags & MAC_MLS_FLAG_EFFECTIVE) != 0, 248 ("mls_dominate_effective: a not effective")); 249 KASSERT((b->mm_flags & MAC_MLS_FLAG_EFFECTIVE) != 0, 250 ("mls_dominate_effective: b not effective")); 251 252 return (mls_dominate_element(&a->mm_effective, &b->mm_effective)); 253} 254 255static int 256mls_equal_element(struct mac_mls_element *a, struct mac_mls_element *b) 257{ 258 259 if (a->mme_type == MAC_MLS_TYPE_EQUAL || 260 b->mme_type == MAC_MLS_TYPE_EQUAL) 261 return (1); 262 263 return (a->mme_type == b->mme_type && a->mme_level == b->mme_level); 264} 265 266static int 267mls_equal_effective(struct mac_mls *a, struct mac_mls *b) 268{ 269 270 KASSERT((a->mm_flags & MAC_MLS_FLAG_EFFECTIVE) != 0, 271 ("mls_equal_effective: a not effective")); 272 KASSERT((b->mm_flags & MAC_MLS_FLAG_EFFECTIVE) != 0, 273 ("mls_equal_effective: b not effective")); 274 275 return (mls_equal_element(&a->mm_effective, &b->mm_effective)); 276} 277 278static int 279mls_contains_equal(struct mac_mls *mm) 280{ 281 282 if (mm->mm_flags & MAC_MLS_FLAG_EFFECTIVE) 283 if (mm->mm_effective.mme_type == MAC_MLS_TYPE_EQUAL) 284 return (1); 285 286 if (mm->mm_flags & MAC_MLS_FLAG_RANGE) { 287 if (mm->mm_rangelow.mme_type == MAC_MLS_TYPE_EQUAL) 288 return (1); 289 if (mm->mm_rangehigh.mme_type == MAC_MLS_TYPE_EQUAL) 290 return (1); 291 } 292 293 return (0); 294} 295 296static int 297mls_subject_privileged(struct mac_mls *mm) 298{ 299 300 KASSERT((mm->mm_flags & MAC_MLS_FLAGS_BOTH) == MAC_MLS_FLAGS_BOTH, 301 ("mls_subject_privileged: subject doesn't have both labels")); 302 303 /* If the effective is EQUAL, it's ok. */ 304 if (mm->mm_effective.mme_type == MAC_MLS_TYPE_EQUAL) 305 return (0); 306 307 /* If either range endpoint is EQUAL, it's ok. */ 308 if (mm->mm_rangelow.mme_type == MAC_MLS_TYPE_EQUAL || 309 mm->mm_rangehigh.mme_type == MAC_MLS_TYPE_EQUAL) 310 return (0); 311 312 /* If the range is low-high, it's ok. */ 313 if (mm->mm_rangelow.mme_type == MAC_MLS_TYPE_LOW && 314 mm->mm_rangehigh.mme_type == MAC_MLS_TYPE_HIGH) 315 return (0); 316 317 /* It's not ok. */ 318 return (EPERM); 319} 320 321static int 322mls_valid(struct mac_mls *mm) 323{ 324 325 if (mm->mm_flags & MAC_MLS_FLAG_EFFECTIVE) { 326 switch (mm->mm_effective.mme_type) { 327 case MAC_MLS_TYPE_LEVEL: 328 break; 329 330 case MAC_MLS_TYPE_EQUAL: 331 case MAC_MLS_TYPE_HIGH: 332 case MAC_MLS_TYPE_LOW: 333 if (mm->mm_effective.mme_level != 0 || 334 !MAC_MLS_BIT_SET_EMPTY( 335 mm->mm_effective.mme_compartments)) 336 return (EINVAL); 337 break; 338 339 default: 340 return (EINVAL); 341 } 342 } else { 343 if (mm->mm_effective.mme_type != MAC_MLS_TYPE_UNDEF) 344 return (EINVAL); 345 } 346 347 if (mm->mm_flags & MAC_MLS_FLAG_RANGE) { 348 switch (mm->mm_rangelow.mme_type) { 349 case MAC_MLS_TYPE_LEVEL: 350 break; 351 352 case MAC_MLS_TYPE_EQUAL: 353 case MAC_MLS_TYPE_HIGH: 354 case MAC_MLS_TYPE_LOW: 355 if (mm->mm_rangelow.mme_level != 0 || 356 !MAC_MLS_BIT_SET_EMPTY( 357 mm->mm_rangelow.mme_compartments)) 358 return (EINVAL); 359 break; 360 361 default: 362 return (EINVAL); 363 } 364 365 switch (mm->mm_rangehigh.mme_type) { 366 case MAC_MLS_TYPE_LEVEL: 367 break; 368 369 case MAC_MLS_TYPE_EQUAL: 370 case MAC_MLS_TYPE_HIGH: 371 case MAC_MLS_TYPE_LOW: 372 if (mm->mm_rangehigh.mme_level != 0 || 373 !MAC_MLS_BIT_SET_EMPTY( 374 mm->mm_rangehigh.mme_compartments)) 375 return (EINVAL); 376 break; 377 378 default: 379 return (EINVAL); 380 } 381 if (!mls_dominate_element(&mm->mm_rangehigh, 382 &mm->mm_rangelow)) 383 return (EINVAL); 384 } else { 385 if (mm->mm_rangelow.mme_type != MAC_MLS_TYPE_UNDEF || 386 mm->mm_rangehigh.mme_type != MAC_MLS_TYPE_UNDEF) 387 return (EINVAL); 388 } 389 390 return (0); 391} 392 393static void 394mls_set_range(struct mac_mls *mm, u_short typelow, u_short levellow, 395 u_char *compartmentslow, u_short typehigh, u_short levelhigh, 396 u_char *compartmentshigh) 397{ 398 399 mm->mm_rangelow.mme_type = typelow; 400 mm->mm_rangelow.mme_level = levellow; 401 if (compartmentslow != NULL) 402 memcpy(mm->mm_rangelow.mme_compartments, compartmentslow, 403 sizeof(mm->mm_rangelow.mme_compartments)); 404 mm->mm_rangehigh.mme_type = typehigh; 405 mm->mm_rangehigh.mme_level = levelhigh; 406 if (compartmentshigh != NULL) 407 memcpy(mm->mm_rangehigh.mme_compartments, compartmentshigh, 408 sizeof(mm->mm_rangehigh.mme_compartments)); 409 mm->mm_flags |= MAC_MLS_FLAG_RANGE; 410} 411 412static void 413mls_set_effective(struct mac_mls *mm, u_short type, u_short level, 414 u_char *compartments) 415{ 416 417 mm->mm_effective.mme_type = type; 418 mm->mm_effective.mme_level = level; 419 if (compartments != NULL) 420 memcpy(mm->mm_effective.mme_compartments, compartments, 421 sizeof(mm->mm_effective.mme_compartments)); 422 mm->mm_flags |= MAC_MLS_FLAG_EFFECTIVE; 423} 424 425static void 426mls_copy_range(struct mac_mls *labelfrom, struct mac_mls *labelto) 427{ 428 429 KASSERT((labelfrom->mm_flags & MAC_MLS_FLAG_RANGE) != 0, 430 ("mls_copy_range: labelfrom not range")); 431 432 labelto->mm_rangelow = labelfrom->mm_rangelow; 433 labelto->mm_rangehigh = labelfrom->mm_rangehigh; 434 labelto->mm_flags |= MAC_MLS_FLAG_RANGE; 435} 436 437static void 438mls_copy_effective(struct mac_mls *labelfrom, struct mac_mls *labelto) 439{ 440 441 KASSERT((labelfrom->mm_flags & MAC_MLS_FLAG_EFFECTIVE) != 0, 442 ("mls_copy_effective: labelfrom not effective")); 443 444 labelto->mm_effective = labelfrom->mm_effective; 445 labelto->mm_flags |= MAC_MLS_FLAG_EFFECTIVE; 446} 447 448static void 449mls_copy(struct mac_mls *source, struct mac_mls *dest) 450{ 451 452 if (source->mm_flags & MAC_MLS_FLAG_EFFECTIVE) 453 mls_copy_effective(source, dest); 454 if (source->mm_flags & MAC_MLS_FLAG_RANGE) 455 mls_copy_range(source, dest); 456} 457 458/* 459 * Policy module operations. 460 */ 461static void 462mls_init(struct mac_policy_conf *conf) 463{ 464 465 zone_mls = uma_zcreate("mac_mls", sizeof(struct mac_mls), NULL, 466 NULL, NULL, NULL, UMA_ALIGN_PTR, 0); 467} 468 469/* 470 * Label operations. 471 */ 472static void 473mls_init_label(struct label *label) 474{ 475 476 SLOT_SET(label, mls_alloc(M_WAITOK)); 477} 478 479static int 480mls_init_label_waitcheck(struct label *label, int flag) 481{ 482 483 SLOT_SET(label, mls_alloc(flag)); 484 if (SLOT(label) == NULL) 485 return (ENOMEM); 486 487 return (0); 488} 489 490static void 491mls_destroy_label(struct label *label) 492{ 493 494 mls_free(SLOT(label)); 495 SLOT_SET(label, NULL); 496} 497 498/* 499 * mls_element_to_string() accepts an sbuf and MLS element. It converts the 500 * MLS element to a string and stores the result in the sbuf; if there isn't 501 * space in the sbuf, -1 is returned. 502 */ 503static int 504mls_element_to_string(struct sbuf *sb, struct mac_mls_element *element) 505{ 506 int i, first; 507 508 switch (element->mme_type) { 509 case MAC_MLS_TYPE_HIGH: 510 return (sbuf_printf(sb, "high")); 511 512 case MAC_MLS_TYPE_LOW: 513 return (sbuf_printf(sb, "low")); 514 515 case MAC_MLS_TYPE_EQUAL: 516 return (sbuf_printf(sb, "equal")); 517 518 case MAC_MLS_TYPE_LEVEL: 519 if (sbuf_printf(sb, "%d", element->mme_level) == -1) 520 return (-1); 521 522 first = 1; 523 for (i = 1; i <= MAC_MLS_MAX_COMPARTMENTS; i++) { 524 if (MAC_MLS_BIT_TEST(i, element->mme_compartments)) { 525 if (first) { 526 if (sbuf_putc(sb, ':') == -1) 527 return (-1); 528 if (sbuf_printf(sb, "%d", i) == -1) 529 return (-1); 530 first = 0; 531 } else { 532 if (sbuf_printf(sb, "+%d", i) == -1) 533 return (-1); 534 } 535 } 536 } 537 return (0); 538 539 default: 540 panic("mls_element_to_string: invalid type (%d)", 541 element->mme_type); 542 } 543} 544 545/* 546 * mls_to_string() converts an MLS label to a string, and places the results 547 * in the passed sbuf. It returns 0 on success, or EINVAL if there isn't 548 * room in the sbuf. Note: the sbuf will be modified even in a failure case, 549 * so the caller may need to revert the sbuf by restoring the offset if 550 * that's undesired. 551 */ 552static int 553mls_to_string(struct sbuf *sb, struct mac_mls *mm) 554{ 555 556 if (mm->mm_flags & MAC_MLS_FLAG_EFFECTIVE) { 557 if (mls_element_to_string(sb, &mm->mm_effective) == -1) 558 return (EINVAL); 559 } 560 561 if (mm->mm_flags & MAC_MLS_FLAG_RANGE) { 562 if (sbuf_putc(sb, '(') == -1) 563 return (EINVAL); 564 565 if (mls_element_to_string(sb, &mm->mm_rangelow) == -1) 566 return (EINVAL); 567 568 if (sbuf_putc(sb, '-') == -1) 569 return (EINVAL); 570 571 if (mls_element_to_string(sb, &mm->mm_rangehigh) == -1) 572 return (EINVAL); 573 574 if (sbuf_putc(sb, ')') == -1) 575 return (EINVAL); 576 } 577 578 return (0); 579} 580 581static int 582mls_externalize_label(struct label *label, char *element_name, 583 struct sbuf *sb, int *claimed) 584{ 585 struct mac_mls *mm; 586 587 if (strcmp(MAC_MLS_LABEL_NAME, element_name) != 0) 588 return (0); 589 590 (*claimed)++; 591 592 mm = SLOT(label); 593 594 return (mls_to_string(sb, mm)); 595} 596 597static int 598mls_parse_element(struct mac_mls_element *element, char *string) 599{ 600 char *compartment, *end, *level; 601 int value; 602 603 if (strcmp(string, "high") == 0 || strcmp(string, "hi") == 0) { 604 element->mme_type = MAC_MLS_TYPE_HIGH; 605 element->mme_level = MAC_MLS_TYPE_UNDEF; 606 } else if (strcmp(string, "low") == 0 || strcmp(string, "lo") == 0) { 607 element->mme_type = MAC_MLS_TYPE_LOW; 608 element->mme_level = MAC_MLS_TYPE_UNDEF; 609 } else if (strcmp(string, "equal") == 0 || 610 strcmp(string, "eq") == 0) { 611 element->mme_type = MAC_MLS_TYPE_EQUAL; 612 element->mme_level = MAC_MLS_TYPE_UNDEF; 613 } else { 614 element->mme_type = MAC_MLS_TYPE_LEVEL; 615 616 /* 617 * Numeric level piece of the element. 618 */ 619 level = strsep(&string, ":"); 620 value = strtol(level, &end, 10); 621 if (end == level || *end != '\0') 622 return (EINVAL); 623 if (value < 0 || value > 65535) 624 return (EINVAL); 625 element->mme_level = value; 626 627 /* 628 * Optional compartment piece of the element. If none are 629 * included, we assume that the label has no compartments. 630 */ 631 if (string == NULL) 632 return (0); 633 if (*string == '\0') 634 return (0); 635 636 while ((compartment = strsep(&string, "+")) != NULL) { 637 value = strtol(compartment, &end, 10); 638 if (compartment == end || *end != '\0') 639 return (EINVAL); 640 if (value < 1 || value > MAC_MLS_MAX_COMPARTMENTS) 641 return (EINVAL); 642 MAC_MLS_BIT_SET(value, element->mme_compartments); 643 } 644 } 645 646 return (0); 647} 648 649/* 650 * Note: destructively consumes the string, make a local copy before calling 651 * if that's a problem. 652 */ 653static int 654mls_parse(struct mac_mls *mm, char *string) 655{ 656 char *rangehigh, *rangelow, *effective; 657 int error; 658 659 effective = strsep(&string, "("); 660 if (*effective == '\0') 661 effective = NULL; 662 663 if (string != NULL) { 664 rangelow = strsep(&string, "-"); 665 if (string == NULL) 666 return (EINVAL); 667 rangehigh = strsep(&string, ")"); 668 if (string == NULL) 669 return (EINVAL); 670 if (*string != '\0') 671 return (EINVAL); 672 } else { 673 rangelow = NULL; 674 rangehigh = NULL; 675 } 676 677 KASSERT((rangelow != NULL && rangehigh != NULL) || 678 (rangelow == NULL && rangehigh == NULL), 679 ("mls_parse: range mismatch")); 680 681 bzero(mm, sizeof(*mm)); 682 if (effective != NULL) { 683 error = mls_parse_element(&mm->mm_effective, effective); 684 if (error) 685 return (error); 686 mm->mm_flags |= MAC_MLS_FLAG_EFFECTIVE; 687 } 688 689 if (rangelow != NULL) { 690 error = mls_parse_element(&mm->mm_rangelow, rangelow); 691 if (error) 692 return (error); 693 error = mls_parse_element(&mm->mm_rangehigh, rangehigh); 694 if (error) 695 return (error); 696 mm->mm_flags |= MAC_MLS_FLAG_RANGE; 697 } 698 699 error = mls_valid(mm); 700 if (error) 701 return (error); 702 703 return (0); 704} 705 706static int 707mls_internalize_label(struct label *label, char *element_name, 708 char *element_data, int *claimed) 709{ 710 struct mac_mls *mm, mm_temp; 711 int error; 712 713 if (strcmp(MAC_MLS_LABEL_NAME, element_name) != 0) 714 return (0); 715 716 (*claimed)++; 717 718 error = mls_parse(&mm_temp, element_data); 719 if (error) 720 return (error); 721 722 mm = SLOT(label); 723 *mm = mm_temp; 724 725 return (0); 726} 727 728static void 729mls_copy_label(struct label *src, struct label *dest) 730{ 731 732 *SLOT(dest) = *SLOT(src); 733} 734 735/* 736 * Object-specific entry point implementations are sorted alphabetically by 737 * object type name and then by operation. 738 */ 739static int 740mls_bpfdesc_check_receive(struct bpf_d *d, struct label *dlabel, 741 struct ifnet *ifp, struct label *ifplabel) 742{ 743 struct mac_mls *a, *b; 744 745 if (!mls_enabled) 746 return (0); 747 748 a = SLOT(dlabel); 749 b = SLOT(ifplabel); 750 751 if (mls_equal_effective(a, b)) 752 return (0); 753 return (EACCES); 754} 755 756static void 757mls_bpfdesc_create(struct ucred *cred, struct bpf_d *d, struct label *dlabel) 758{ 759 struct mac_mls *source, *dest; 760 761 source = SLOT(cred->cr_label); 762 dest = SLOT(dlabel); 763 764 mls_copy_effective(source, dest); 765} 766 767static void 768mls_bpfdesc_create_mbuf(struct bpf_d *d, struct label *dlabel, 769 struct mbuf *m, struct label *mlabel) 770{ 771 struct mac_mls *source, *dest; 772 773 source = SLOT(dlabel); 774 dest = SLOT(mlabel); 775 776 mls_copy_effective(source, dest); 777} 778 779static void 780mls_cred_associate_nfsd(struct ucred *cred) 781{ 782 struct mac_mls *label; 783 784 label = SLOT(cred->cr_label); 785 mls_set_effective(label, MAC_MLS_TYPE_LOW, 0, NULL); 786 mls_set_range(label, MAC_MLS_TYPE_LOW, 0, NULL, MAC_MLS_TYPE_HIGH, 0, 787 NULL); 788} 789 790static int 791mls_cred_check_relabel(struct ucred *cred, struct label *newlabel) 792{ 793 struct mac_mls *subj, *new; 794 int error; 795 796 subj = SLOT(cred->cr_label); 797 new = SLOT(newlabel); 798 799 /* 800 * If there is an MLS label update for the credential, it may be an 801 * update of effective, range, or both. 802 */ 803 error = mls_atmostflags(new, MAC_MLS_FLAGS_BOTH); 804 if (error) 805 return (error); 806 807 /* 808 * If the MLS label is to be changed, authorize as appropriate. 809 */ 810 if (new->mm_flags & MAC_MLS_FLAGS_BOTH) { 811 /* 812 * If the change request modifies both the MLS label 813 * effective and range, check that the new effective will be 814 * in the new range. 815 */ 816 if ((new->mm_flags & MAC_MLS_FLAGS_BOTH) == 817 MAC_MLS_FLAGS_BOTH && !mls_effective_in_range(new, new)) 818 return (EINVAL); 819 820 /* 821 * To change the MLS effective label on a credential, the new 822 * effective label must be in the current range. 823 */ 824 if (new->mm_flags & MAC_MLS_FLAG_EFFECTIVE && 825 !mls_effective_in_range(new, subj)) 826 return (EPERM); 827 828 /* 829 * To change the MLS range label on a credential, the new 830 * range must be in the current range. 831 */ 832 if (new->mm_flags & MAC_MLS_FLAG_RANGE && 833 !mls_range_in_range(new, subj)) 834 return (EPERM); 835 836 /* 837 * To have EQUAL in any component of the new credential MLS 838 * label, the subject must already have EQUAL in their label. 839 */ 840 if (mls_contains_equal(new)) { 841 error = mls_subject_privileged(subj); 842 if (error) 843 return (error); 844 } 845 } 846 847 return (0); 848} 849 850static int 851mls_cred_check_visible(struct ucred *cr1, struct ucred *cr2) 852{ 853 struct mac_mls *subj, *obj; 854 855 if (!mls_enabled) 856 return (0); 857 858 subj = SLOT(cr1->cr_label); 859 obj = SLOT(cr2->cr_label); 860 861 /* XXX: range */ 862 if (!mls_dominate_effective(subj, obj)) 863 return (ESRCH); 864 865 return (0); 866} 867 868static void 869mls_cred_create_init(struct ucred *cred) 870{ 871 struct mac_mls *dest; 872 873 dest = SLOT(cred->cr_label); 874 875 mls_set_effective(dest, MAC_MLS_TYPE_LOW, 0, NULL); 876 mls_set_range(dest, MAC_MLS_TYPE_LOW, 0, NULL, MAC_MLS_TYPE_HIGH, 0, 877 NULL); 878} 879 880static void 881mls_cred_create_swapper(struct ucred *cred) 882{ 883 struct mac_mls *dest; 884 885 dest = SLOT(cred->cr_label); 886 887 mls_set_effective(dest, MAC_MLS_TYPE_EQUAL, 0, NULL); 888 mls_set_range(dest, MAC_MLS_TYPE_LOW, 0, NULL, MAC_MLS_TYPE_HIGH, 0, 889 NULL); 890} 891 892static void 893mls_cred_relabel(struct ucred *cred, struct label *newlabel) 894{ 895 struct mac_mls *source, *dest; 896 897 source = SLOT(newlabel); 898 dest = SLOT(cred->cr_label); 899 900 mls_copy(source, dest); 901} 902 903static void 904mls_devfs_create_device(struct ucred *cred, struct mount *mp, 905 struct cdev *dev, struct devfs_dirent *de, struct label *delabel) 906{ 907 struct mac_mls *mm; 908 int mls_type; 909 910 mm = SLOT(delabel); 911 if (strcmp(dev->si_name, "null") == 0 || 912 strcmp(dev->si_name, "zero") == 0 || 913 strcmp(dev->si_name, "random") == 0 || 914 strncmp(dev->si_name, "fd/", strlen("fd/")) == 0) 915 mls_type = MAC_MLS_TYPE_EQUAL; 916 else if (strcmp(dev->si_name, "kmem") == 0 || 917 strcmp(dev->si_name, "mem") == 0) 918 mls_type = MAC_MLS_TYPE_HIGH; 919 else if (ptys_equal && 920 (strncmp(dev->si_name, "ttyp", strlen("ttyp")) == 0 || 921 strncmp(dev->si_name, "ptyp", strlen("ptyp")) == 0)) 922 mls_type = MAC_MLS_TYPE_EQUAL; 923 else 924 mls_type = MAC_MLS_TYPE_LOW; 925 mls_set_effective(mm, mls_type, 0, NULL); 926} 927 928static void 929mls_devfs_create_directory(struct mount *mp, char *dirname, int dirnamelen, 930 struct devfs_dirent *de, struct label *delabel) 931{ 932 struct mac_mls *mm; 933 934 mm = SLOT(delabel); 935 mls_set_effective(mm, MAC_MLS_TYPE_LOW, 0, NULL); 936} 937 938static void 939mls_devfs_create_symlink(struct ucred *cred, struct mount *mp, 940 struct devfs_dirent *dd, struct label *ddlabel, struct devfs_dirent *de, 941 struct label *delabel) 942{ 943 struct mac_mls *source, *dest; 944 945 source = SLOT(cred->cr_label); 946 dest = SLOT(delabel); 947 948 mls_copy_effective(source, dest); 949} 950 951static void 952mls_devfs_update(struct mount *mp, struct devfs_dirent *de, 953 struct label *delabel, struct vnode *vp, struct label *vplabel) 954{ 955 struct mac_mls *source, *dest; 956 957 source = SLOT(vplabel); 958 dest = SLOT(delabel); 959 960 mls_copy_effective(source, dest); 961} 962 963static void 964mls_devfs_vnode_associate(struct mount *mp, struct label *mplabel, 965 struct devfs_dirent *de, struct label *delabel, struct vnode *vp, 966 struct label *vplabel) 967{ 968 struct mac_mls *source, *dest; 969 970 source = SLOT(delabel); 971 dest = SLOT(vplabel); 972 973 mls_copy_effective(source, dest); 974} 975 976static int 977mls_ifnet_check_relabel(struct ucred *cred, struct ifnet *ifp, 978 struct label *ifplabel, struct label *newlabel) 979{ 980 struct mac_mls *subj, *new; 981 int error; 982 983 subj = SLOT(cred->cr_label); 984 new = SLOT(newlabel); 985 986 /* 987 * If there is an MLS label update for the interface, it may be an 988 * update of effective, range, or both. 989 */ 990 error = mls_atmostflags(new, MAC_MLS_FLAGS_BOTH); 991 if (error) 992 return (error); 993 994 /* 995 * Relabeling network interfaces requires MLS privilege. 996 */ 997 return (mls_subject_privileged(subj)); 998} 999 1000static int 1001mls_ifnet_check_transmit(struct ifnet *ifp, struct label *ifplabel, 1002 struct mbuf *m, struct label *mlabel) 1003{ 1004 struct mac_mls *p, *i; 1005 1006 if (!mls_enabled) 1007 return (0); 1008 1009 p = SLOT(mlabel); 1010 i = SLOT(ifplabel); 1011 1012 return (mls_effective_in_range(p, i) ? 0 : EACCES); 1013} 1014 1015static void 1016mls_ifnet_create(struct ifnet *ifp, struct label *ifplabel) 1017{ 1018 struct mac_mls *dest; 1019 int type; 1020 1021 dest = SLOT(ifplabel); 1022 1023 if (ifp->if_type == IFT_LOOP) 1024 type = MAC_MLS_TYPE_EQUAL; 1025 else 1026 type = MAC_MLS_TYPE_LOW; 1027 1028 mls_set_effective(dest, type, 0, NULL); 1029 mls_set_range(dest, type, 0, NULL, type, 0, NULL); 1030} 1031 1032static void 1033mls_ifnet_create_mbuf(struct ifnet *ifp, struct label *ifplabel, 1034 struct mbuf *m, struct label *mlabel) 1035{ 1036 struct mac_mls *source, *dest; 1037 1038 source = SLOT(ifplabel); 1039 dest = SLOT(mlabel); 1040 1041 mls_copy_effective(source, dest); 1042} 1043 1044static void 1045mls_ifnet_relabel(struct ucred *cred, struct ifnet *ifp, 1046 struct label *ifplabel, struct label *newlabel) 1047{ 1048 struct mac_mls *source, *dest; 1049 1050 source = SLOT(newlabel); 1051 dest = SLOT(ifplabel); 1052 1053 mls_copy(source, dest); 1054} 1055 1056static int 1057mls_inpcb_check_deliver(struct inpcb *inp, struct label *inplabel, 1058 struct mbuf *m, struct label *mlabel) 1059{ 1060 struct mac_mls *p, *i; 1061 1062 if (!mls_enabled) 1063 return (0); 1064 1065 p = SLOT(mlabel); 1066 i = SLOT(inplabel); 1067 1068 return (mls_equal_effective(p, i) ? 0 : EACCES); 1069} 1070 1071static int 1072mls_inpcb_check_visible(struct ucred *cred, struct inpcb *inp, 1073 struct label *inplabel) 1074{ 1075 struct mac_mls *subj, *obj; 1076 1077 if (!mls_enabled) 1078 return (0); 1079 1080 subj = SLOT(cred->cr_label); 1081 obj = SLOT(inplabel); 1082 1083 if (!mls_dominate_effective(subj, obj)) 1084 return (ENOENT); 1085 1086 return (0); 1087} 1088 1089static void 1090mls_inpcb_create(struct socket *so, struct label *solabel, struct inpcb *inp, 1091 struct label *inplabel) 1092{ 1093 struct mac_mls *source, *dest; 1094 1095 source = SLOT(solabel); 1096 dest = SLOT(inplabel); 1097 1098 mls_copy_effective(source, dest); 1099} 1100 1101static void 1102mls_inpcb_create_mbuf(struct inpcb *inp, struct label *inplabel, 1103 struct mbuf *m, struct label *mlabel) 1104{ 1105 struct mac_mls *source, *dest; 1106 1107 source = SLOT(inplabel); 1108 dest = SLOT(mlabel); 1109 1110 mls_copy_effective(source, dest); 1111} 1112 1113static void 1114mls_inpcb_sosetlabel(struct socket *so, struct label *solabel, 1115 struct inpcb *inp, struct label *inplabel) 1116{ 1117 struct mac_mls *source, *dest; 1118 1119 SOCK_LOCK_ASSERT(so); 1120 1121 source = SLOT(solabel); 1122 dest = SLOT(inplabel); 1123 1124 mls_copy(source, dest); 1125} 1126 1127static void 1128mls_ip6q_create(struct mbuf *m, struct label *mlabel, struct ip6q *q6, 1129 struct label *q6label) 1130{ 1131 struct mac_mls *source, *dest; 1132 1133 source = SLOT(mlabel); 1134 dest = SLOT(q6label); 1135 1136 mls_copy_effective(source, dest); 1137} 1138 1139static int 1140mls_ip6q_match(struct mbuf *m, struct label *mlabel, struct ip6q *q6, 1141 struct label *q6label) 1142{ 1143 struct mac_mls *a, *b; 1144 1145 a = SLOT(q6label); 1146 b = SLOT(mlabel); 1147 1148 return (mls_equal_effective(a, b)); 1149} 1150 1151static void 1152mls_ip6q_reassemble(struct ip6q *q6, struct label *q6label, struct mbuf *m, 1153 struct label *mlabel) 1154{ 1155 struct mac_mls *source, *dest; 1156 1157 source = SLOT(q6label); 1158 dest = SLOT(mlabel); 1159 1160 /* Just use the head, since we require them all to match. */ 1161 mls_copy_effective(source, dest); 1162} 1163 1164static void 1165mls_ip6q_update(struct mbuf *m, struct label *mlabel, struct ip6q *q6, 1166 struct label *q6label) 1167{ 1168 1169 /* NOOP: we only accept matching labels, so no need to update */ 1170} 1171 1172static void 1173mls_ipq_create(struct mbuf *m, struct label *mlabel, struct ipq *q, 1174 struct label *qlabel) 1175{ 1176 struct mac_mls *source, *dest; 1177 1178 source = SLOT(mlabel); 1179 dest = SLOT(qlabel); 1180 1181 mls_copy_effective(source, dest); 1182} 1183 1184static int 1185mls_ipq_match(struct mbuf *m, struct label *mlabel, struct ipq *q, 1186 struct label *qlabel) 1187{ 1188 struct mac_mls *a, *b; 1189 1190 a = SLOT(qlabel); 1191 b = SLOT(mlabel); 1192 1193 return (mls_equal_effective(a, b)); 1194} 1195 1196static void 1197mls_ipq_reassemble(struct ipq *q, struct label *qlabel, struct mbuf *m, 1198 struct label *mlabel) 1199{ 1200 struct mac_mls *source, *dest; 1201 1202 source = SLOT(qlabel); 1203 dest = SLOT(mlabel); 1204 1205 /* Just use the head, since we require them all to match. */ 1206 mls_copy_effective(source, dest); 1207} 1208 1209static void 1210mls_ipq_update(struct mbuf *m, struct label *mlabel, struct ipq *q, 1211 struct label *qlabel) 1212{ 1213 1214 /* NOOP: we only accept matching labels, so no need to update */ 1215} 1216 1217static int 1218mls_mount_check_stat(struct ucred *cred, struct mount *mp, 1219 struct label *mntlabel) 1220{ 1221 struct mac_mls *subj, *obj; 1222 1223 if (!mls_enabled) 1224 return (0); 1225 1226 subj = SLOT(cred->cr_label); 1227 obj = SLOT(mntlabel); 1228 1229 if (!mls_dominate_effective(subj, obj)) 1230 return (EACCES); 1231 1232 return (0); 1233} 1234 1235static void 1236mls_mount_create(struct ucred *cred, struct mount *mp, struct label *mplabel) 1237{ 1238 struct mac_mls *source, *dest; 1239 1240 source = SLOT(cred->cr_label); 1241 dest = SLOT(mplabel); 1242 1243 mls_copy_effective(source, dest); 1244} 1245 1246static void 1247mls_netatalk_aarp_send(struct ifnet *ifp, struct label *ifplabel, 1248 struct mbuf *m, struct label *mlabel) 1249{ 1250 struct mac_mls *dest; 1251 1252 dest = SLOT(mlabel); 1253 1254 mls_set_effective(dest, MAC_MLS_TYPE_EQUAL, 0, NULL); 1255} 1256 1257static void 1258mls_netinet_arp_send(struct ifnet *ifp, struct label *ifplabel, 1259 struct mbuf *m, struct label *mlabel) 1260{ 1261 struct mac_mls *dest; 1262 1263 dest = SLOT(mlabel); 1264 1265 mls_set_effective(dest, MAC_MLS_TYPE_EQUAL, 0, NULL); 1266} 1267 1268static void 1269mls_netinet_firewall_reply(struct mbuf *mrecv, struct label *mrecvlabel, 1270 struct mbuf *msend, struct label *msendlabel) 1271{ 1272 struct mac_mls *source, *dest; 1273 1274 source = SLOT(mrecvlabel); 1275 dest = SLOT(msendlabel); 1276 1277 mls_copy_effective(source, dest); 1278} 1279 1280static void 1281mls_netinet_firewall_send(struct mbuf *m, struct label *mlabel) 1282{ 1283 struct mac_mls *dest; 1284 1285 dest = SLOT(mlabel); 1286 1287 /* XXX: where is the label for the firewall really comming from? */ 1288 mls_set_effective(dest, MAC_MLS_TYPE_EQUAL, 0, NULL); 1289} 1290 1291static void 1292mls_netinet_fragment(struct mbuf *m, struct label *mlabel, struct mbuf *frag, 1293 struct label *fraglabel) 1294{ 1295 struct mac_mls *source, *dest; 1296 1297 source = SLOT(mlabel); 1298 dest = SLOT(fraglabel); 1299 1300 mls_copy_effective(source, dest); 1301} 1302 1303static void 1304mls_netinet_icmp_reply(struct mbuf *mrecv, struct label *mrecvlabel, 1305 struct mbuf *msend, struct label *msendlabel) 1306{ 1307 struct mac_mls *source, *dest; 1308 1309 source = SLOT(mrecvlabel); 1310 dest = SLOT(msendlabel); 1311 1312 mls_copy_effective(source, dest); 1313} 1314 1315static void 1316mls_netinet_igmp_send(struct ifnet *ifp, struct label *ifplabel, 1317 struct mbuf *m, struct label *mlabel) 1318{ 1319 struct mac_mls *dest; 1320 1321 dest = SLOT(mlabel); 1322 1323 mls_set_effective(dest, MAC_MLS_TYPE_EQUAL, 0, NULL); 1324} 1325 1326static void 1327mls_netinet6_nd6_send(struct ifnet *ifp, struct label *ifplabel, 1328 struct mbuf *m, struct label *mlabel) 1329{ 1330 struct mac_mls *dest; 1331 1332 dest = SLOT(mlabel); 1333 1334 mls_set_effective(dest, MAC_MLS_TYPE_EQUAL, 0, NULL); 1335} 1336 1337static int 1338mls_pipe_check_ioctl(struct ucred *cred, struct pipepair *pp, 1339 struct label *pplabel, unsigned long cmd, void /* caddr_t */ *data) 1340{ 1341 1342 if (!mls_enabled) 1343 return (0); 1344 1345 /* XXX: This will be implemented soon... */ 1346 1347 return (0); 1348} 1349 1350static int 1351mls_pipe_check_poll(struct ucred *cred, struct pipepair *pp, 1352 struct label *pplabel) 1353{ 1354 struct mac_mls *subj, *obj; 1355 1356 if (!mls_enabled) 1357 return (0); 1358 1359 subj = SLOT(cred->cr_label); 1360 obj = SLOT(pplabel); 1361 1362 if (!mls_dominate_effective(subj, obj)) 1363 return (EACCES); 1364 1365 return (0); 1366} 1367 1368static int 1369mls_pipe_check_read(struct ucred *cred, struct pipepair *pp, 1370 struct label *pplabel) 1371{ 1372 struct mac_mls *subj, *obj; 1373 1374 if (!mls_enabled) 1375 return (0); 1376 1377 subj = SLOT(cred->cr_label); 1378 obj = SLOT(pplabel); 1379 1380 if (!mls_dominate_effective(subj, obj)) 1381 return (EACCES); 1382 1383 return (0); 1384} 1385 1386static int 1387mls_pipe_check_relabel(struct ucred *cred, struct pipepair *pp, 1388 struct label *pplabel, struct label *newlabel) 1389{ 1390 struct mac_mls *subj, *obj, *new; 1391 int error; 1392 1393 new = SLOT(newlabel); 1394 subj = SLOT(cred->cr_label); 1395 obj = SLOT(pplabel); 1396 1397 /* 1398 * If there is an MLS label update for a pipe, it must be a effective 1399 * update. 1400 */ 1401 error = mls_atmostflags(new, MAC_MLS_FLAG_EFFECTIVE); 1402 if (error) 1403 return (error); 1404 1405 /* 1406 * To perform a relabel of a pipe (MLS label or not), MLS must 1407 * authorize the relabel. 1408 */ 1409 if (!mls_effective_in_range(obj, subj)) 1410 return (EPERM); 1411 1412 /* 1413 * If the MLS label is to be changed, authorize as appropriate. 1414 */ 1415 if (new->mm_flags & MAC_MLS_FLAG_EFFECTIVE) { 1416 /* 1417 * To change the MLS label on a pipe, the new pipe label must 1418 * be in the subject range. 1419 */ 1420 if (!mls_effective_in_range(new, subj)) 1421 return (EPERM); 1422 1423 /* 1424 * To change the MLS label on a pipe to be EQUAL, the subject 1425 * must have appropriate privilege. 1426 */ 1427 if (mls_contains_equal(new)) { 1428 error = mls_subject_privileged(subj); 1429 if (error) 1430 return (error); 1431 } 1432 } 1433 1434 return (0); 1435} 1436 1437static int 1438mls_pipe_check_stat(struct ucred *cred, struct pipepair *pp, 1439 struct label *pplabel) 1440{ 1441 struct mac_mls *subj, *obj; 1442 1443 if (!mls_enabled) 1444 return (0); 1445 1446 subj = SLOT(cred->cr_label); 1447 obj = SLOT(pplabel); 1448 1449 if (!mls_dominate_effective(subj, obj)) 1450 return (EACCES); 1451 1452 return (0); 1453} 1454 1455static int 1456mls_pipe_check_write(struct ucred *cred, struct pipepair *pp, 1457 struct label *pplabel) 1458{ 1459 struct mac_mls *subj, *obj; 1460 1461 if (!mls_enabled) 1462 return (0); 1463 1464 subj = SLOT(cred->cr_label); 1465 obj = SLOT(pplabel); 1466 1467 if (!mls_dominate_effective(obj, subj)) 1468 return (EACCES); 1469 1470 return (0); 1471} 1472 1473static void 1474mls_pipe_create(struct ucred *cred, struct pipepair *pp, 1475 struct label *pplabel) 1476{ 1477 struct mac_mls *source, *dest; 1478 1479 source = SLOT(cred->cr_label); 1480 dest = SLOT(pplabel); 1481 1482 mls_copy_effective(source, dest); 1483} 1484 1485static void 1486mls_pipe_relabel(struct ucred *cred, struct pipepair *pp, 1487 struct label *pplabel, struct label *newlabel) 1488{ 1489 struct mac_mls *source, *dest; 1490 1491 source = SLOT(newlabel); 1492 dest = SLOT(pplabel); 1493 1494 mls_copy(source, dest); 1495} 1496 1497static int 1498mls_posixsem_check_openunlink(struct ucred *cred, struct ksem *ks, 1499 struct label *kslabel) 1500{ 1501 struct mac_mls *subj, *obj; 1502 1503 if (!mls_enabled) 1504 return (0); 1505 1506 subj = SLOT(cred->cr_label); 1507 obj = SLOT(kslabel); 1508 1509 if (!mls_dominate_effective(obj, subj)) 1510 return (EACCES); 1511 1512 return (0); 1513} 1514 1515static int 1516mls_posixsem_check_rdonly(struct ucred *active_cred, struct ucred *file_cred, 1517 struct ksem *ks, struct label *kslabel) 1518{ 1519 struct mac_mls *subj, *obj; 1520 1521 if (!mls_enabled) 1522 return (0); 1523 1524 subj = SLOT(active_cred->cr_label); 1525 obj = SLOT(kslabel); 1526 1527 if (!mls_dominate_effective(subj, obj)) 1528 return (EACCES); 1529 1530 return (0); 1531} 1532 1533static int 1534mls_posixsem_check_write(struct ucred *active_cred, struct ucred *file_cred, 1535 struct ksem *ks, struct label *kslabel) 1536{ 1537 struct mac_mls *subj, *obj; 1538 1539 if (!mls_enabled) 1540 return (0); 1541 1542 subj = SLOT(active_cred->cr_label); 1543 obj = SLOT(kslabel); 1544 1545 if (!mls_dominate_effective(obj, subj)) 1546 return (EACCES); 1547 1548 return (0); 1549} 1550 1551static void 1552mls_posixsem_create(struct ucred *cred, struct ksem *ks, 1553 struct label *kslabel) 1554{ 1555 struct mac_mls *source, *dest; 1556 1557 source = SLOT(cred->cr_label); 1558 dest = SLOT(kslabel); 1559 1560 mls_copy_effective(source, dest); 1561} 1562 1563static int 1564mls_proc_check_debug(struct ucred *cred, struct proc *p) 1565{ 1566 struct mac_mls *subj, *obj; 1567 1568 if (!mls_enabled) 1569 return (0); 1570 1571 subj = SLOT(cred->cr_label); 1572 obj = SLOT(p->p_ucred->cr_label); 1573 1574 /* XXX: range checks */ 1575 if (!mls_dominate_effective(subj, obj)) 1576 return (ESRCH); 1577 if (!mls_dominate_effective(obj, subj)) 1578 return (EACCES); 1579 1580 return (0); 1581} 1582 1583static int 1584mls_proc_check_sched(struct ucred *cred, struct proc *p) 1585{ 1586 struct mac_mls *subj, *obj; 1587 1588 if (!mls_enabled) 1589 return (0); 1590 1591 subj = SLOT(cred->cr_label); 1592 obj = SLOT(p->p_ucred->cr_label); 1593 1594 /* XXX: range checks */ 1595 if (!mls_dominate_effective(subj, obj)) 1596 return (ESRCH); 1597 if (!mls_dominate_effective(obj, subj)) 1598 return (EACCES); 1599 1600 return (0); 1601} 1602 1603static int 1604mls_proc_check_signal(struct ucred *cred, struct proc *p, int signum) 1605{ 1606 struct mac_mls *subj, *obj; 1607 1608 if (!mls_enabled) 1609 return (0); 1610 1611 subj = SLOT(cred->cr_label); 1612 obj = SLOT(p->p_ucred->cr_label); 1613 1614 /* XXX: range checks */ 1615 if (!mls_dominate_effective(subj, obj)) 1616 return (ESRCH); 1617 if (!mls_dominate_effective(obj, subj)) 1618 return (EACCES); 1619 1620 return (0); 1621} 1622 1623static int 1624mls_socket_check_deliver(struct socket *so, struct label *solabel, 1625 struct mbuf *m, struct label *mlabel) 1626{ 1627 struct mac_mls *p, *s; 1628 int error; 1629 1630 if (!mls_enabled) 1631 return (0); 1632 1633 p = SLOT(mlabel); 1634 s = SLOT(solabel); 1635 1636 SOCK_LOCK(so); 1637 error = mls_equal_effective(p, s) ? 0 : EACCES; 1638 SOCK_UNLOCK(so); 1639 1640 return (error); 1641} 1642 1643static int 1644mls_socket_check_relabel(struct ucred *cred, struct socket *so, 1645 struct label *solabel, struct label *newlabel) 1646{ 1647 struct mac_mls *subj, *obj, *new; 1648 int error; 1649 1650 SOCK_LOCK_ASSERT(so); 1651 1652 new = SLOT(newlabel); 1653 subj = SLOT(cred->cr_label); 1654 obj = SLOT(solabel); 1655 1656 /* 1657 * If there is an MLS label update for the socket, it may be an 1658 * update of effective. 1659 */ 1660 error = mls_atmostflags(new, MAC_MLS_FLAG_EFFECTIVE); 1661 if (error) 1662 return (error); 1663 1664 /* 1665 * To relabel a socket, the old socket effective must be in the 1666 * subject range. 1667 */ 1668 if (!mls_effective_in_range(obj, subj)) 1669 return (EPERM); 1670 1671 /* 1672 * If the MLS label is to be changed, authorize as appropriate. 1673 */ 1674 if (new->mm_flags & MAC_MLS_FLAG_EFFECTIVE) { 1675 /* 1676 * To relabel a socket, the new socket effective must be in 1677 * the subject range. 1678 */ 1679 if (!mls_effective_in_range(new, subj)) 1680 return (EPERM); 1681 1682 /* 1683 * To change the MLS label on the socket to contain EQUAL, 1684 * the subject must have appropriate privilege. 1685 */ 1686 if (mls_contains_equal(new)) { 1687 error = mls_subject_privileged(subj); 1688 if (error) 1689 return (error); 1690 } 1691 } 1692 1693 return (0); 1694} 1695 1696static int 1697mls_socket_check_visible(struct ucred *cred, struct socket *so, 1698 struct label *solabel) 1699{ 1700 struct mac_mls *subj, *obj; 1701 1702 if (!mls_enabled) 1703 return (0); 1704 1705 subj = SLOT(cred->cr_label); 1706 obj = SLOT(solabel); 1707 1708 SOCK_LOCK(so); 1709 if (!mls_dominate_effective(subj, obj)) { 1710 SOCK_UNLOCK(so); 1711 return (ENOENT); 1712 } 1713 SOCK_UNLOCK(so); 1714 1715 return (0); 1716} 1717 1718static void 1719mls_socket_create(struct ucred *cred, struct socket *so, 1720 struct label *solabel) 1721{ 1722 struct mac_mls *source, *dest; 1723 1724 source = SLOT(cred->cr_label); 1725 dest = SLOT(solabel); 1726 1727 mls_copy_effective(source, dest); 1728} 1729 1730static void 1731mls_socket_create_mbuf(struct socket *so, struct label *solabel, 1732 struct mbuf *m, struct label *mlabel) 1733{ 1734 struct mac_mls *source, *dest; 1735 1736 source = SLOT(solabel); 1737 dest = SLOT(mlabel); 1738 1739 SOCK_LOCK(so); 1740 mls_copy_effective(source, dest); 1741 SOCK_UNLOCK(so); 1742} 1743 1744static void 1745mls_socket_newconn(struct socket *oldso, struct label *oldsolabel, 1746 struct socket *newso, struct label *newsolabel) 1747{ 1748 struct mac_mls source, *dest; 1749 1750 SOCK_LOCK(oldso); 1751 source = *SLOT(oldsolabel); 1752 SOCK_UNLOCK(oldso); 1753 1754 dest = SLOT(newsolabel); 1755 1756 SOCK_LOCK(newso); 1757 mls_copy_effective(&source, dest); 1758 SOCK_UNLOCK(newso); 1759} 1760 1761static void 1762mls_socket_relabel(struct ucred *cred, struct socket *so, 1763 struct label *solabel, struct label *newlabel) 1764{ 1765 struct mac_mls *source, *dest; 1766 1767 SOCK_LOCK_ASSERT(so); 1768 1769 source = SLOT(newlabel); 1770 dest = SLOT(solabel); 1771 1772 mls_copy(source, dest); 1773} 1774 1775static void 1776mls_socketpeer_set_from_mbuf(struct mbuf *m, struct label *mlabel, 1777 struct socket *so, struct label *sopeerlabel) 1778{ 1779 struct mac_mls *source, *dest; 1780 1781 source = SLOT(mlabel); 1782 dest = SLOT(sopeerlabel); 1783 1784 SOCK_LOCK(so); 1785 mls_copy_effective(source, dest); 1786 SOCK_UNLOCK(so); 1787} 1788 1789static void 1790mls_socketpeer_set_from_socket(struct socket *oldso, 1791 struct label *oldsolabel, struct socket *newso, 1792 struct label *newsopeerlabel) 1793{ 1794 struct mac_mls source, *dest; 1795 1796 SOCK_LOCK(oldso); 1797 source = *SLOT(oldsolabel); 1798 SOCK_UNLOCK(oldso); 1799 1800 dest = SLOT(newsopeerlabel); 1801 1802 SOCK_LOCK(newso); 1803 mls_copy_effective(&source, dest); 1804 SOCK_UNLOCK(newso); 1805} 1806 1807static void 1808mls_syncache_create(struct label *label, struct inpcb *inp) 1809{ 1810 struct mac_mls *source, *dest; 1811 1812 source = SLOT(inp->inp_label); 1813 dest = SLOT(label); 1814 1815 mls_copy_effective(source, dest); 1816} 1817 1818static void 1819mls_syncache_create_mbuf(struct label *sc_label, struct mbuf *m, 1820 struct label *mlabel) 1821{ 1822 struct mac_mls *source, *dest; 1823 1824 source = SLOT(sc_label); 1825 dest = SLOT(mlabel); 1826 1827 mls_copy_effective(source, dest); 1828} 1829 1830static int 1831mls_system_check_acct(struct ucred *cred, struct vnode *vp, 1832 struct label *vplabel) 1833{ 1834 struct mac_mls *subj, *obj; 1835 1836 if (!mls_enabled) 1837 return (0); 1838 1839 subj = SLOT(cred->cr_label); 1840 obj = SLOT(vplabel); 1841 1842 if (!mls_dominate_effective(obj, subj) || 1843 !mls_dominate_effective(subj, obj)) 1844 return (EACCES); 1845 1846 return (0); 1847} 1848 1849static int 1850mls_system_check_auditctl(struct ucred *cred, struct vnode *vp, 1851 struct label *vplabel) 1852{ 1853 struct mac_mls *subj, *obj; 1854 1855 if (!mls_enabled) 1856 return (0); 1857 1858 subj = SLOT(cred->cr_label); 1859 obj = SLOT(vplabel); 1860 1861 if (!mls_dominate_effective(obj, subj) || 1862 !mls_dominate_effective(subj, obj)) 1863 return (EACCES); 1864 1865 return (0); 1866} 1867 1868static int 1869mls_system_check_swapon(struct ucred *cred, struct vnode *vp, 1870 struct label *vplabel) 1871{ 1872 struct mac_mls *subj, *obj; 1873 1874 if (!mls_enabled) 1875 return (0); 1876 1877 subj = SLOT(cred->cr_label); 1878 obj = SLOT(vplabel); 1879 1880 if (!mls_dominate_effective(obj, subj) || 1881 !mls_dominate_effective(subj, obj)) 1882 return (EACCES); 1883 1884 return (0); 1885} 1886 1887static void 1888mls_sysvmsg_cleanup(struct label *msglabel) 1889{ 1890 1891 bzero(SLOT(msglabel), sizeof(struct mac_mls)); 1892} 1893 1894static void 1895mls_sysvmsg_create(struct ucred *cred, struct msqid_kernel *msqkptr, 1896 struct label *msqlabel, struct msg *msgptr, struct label *msglabel) 1897{ 1898 struct mac_mls *source, *dest; 1899 1900 /* Ignore the msgq label. */ 1901 source = SLOT(cred->cr_label); 1902 dest = SLOT(msglabel); 1903 1904 mls_copy_effective(source, dest); 1905} 1906 1907static int 1908mls_sysvmsq_check_msgrcv(struct ucred *cred, struct msg *msgptr, 1909 struct label *msglabel) 1910{ 1911 struct mac_mls *subj, *obj; 1912 1913 if (!mls_enabled) 1914 return (0); 1915 1916 subj = SLOT(cred->cr_label); 1917 obj = SLOT(msglabel); 1918 1919 if (!mls_dominate_effective(subj, obj)) 1920 return (EACCES); 1921 1922 return (0); 1923} 1924 1925static int 1926mls_sysvmsq_check_msgrmid(struct ucred *cred, struct msg *msgptr, 1927 struct label *msglabel) 1928{ 1929 struct mac_mls *subj, *obj; 1930 1931 if (!mls_enabled) 1932 return (0); 1933 1934 subj = SLOT(cred->cr_label); 1935 obj = SLOT(msglabel); 1936 1937 if (!mls_dominate_effective(obj, subj)) 1938 return (EACCES); 1939 1940 return (0); 1941} 1942 1943static int 1944mls_sysvmsq_check_msqget(struct ucred *cred, struct msqid_kernel *msqkptr, 1945 struct label *msqklabel) 1946{ 1947 struct mac_mls *subj, *obj; 1948 1949 if (!mls_enabled) 1950 return (0); 1951 1952 subj = SLOT(cred->cr_label); 1953 obj = SLOT(msqklabel); 1954 1955 if (!mls_dominate_effective(subj, obj)) 1956 return (EACCES); 1957 1958 return (0); 1959} 1960 1961static int 1962mls_sysvmsq_check_msqsnd(struct ucred *cred, struct msqid_kernel *msqkptr, 1963 struct label *msqklabel) 1964{ 1965 struct mac_mls *subj, *obj; 1966 1967 if (!mls_enabled) 1968 return (0); 1969 1970 subj = SLOT(cred->cr_label); 1971 obj = SLOT(msqklabel); 1972 1973 if (!mls_dominate_effective(obj, subj)) 1974 return (EACCES); 1975 1976 return (0); 1977} 1978 1979static int 1980mls_sysvmsq_check_msqrcv(struct ucred *cred, struct msqid_kernel *msqkptr, 1981 struct label *msqklabel) 1982{ 1983 struct mac_mls *subj, *obj; 1984 1985 if (!mls_enabled) 1986 return (0); 1987 1988 subj = SLOT(cred->cr_label); 1989 obj = SLOT(msqklabel); 1990 1991 if (!mls_dominate_effective(subj, obj)) 1992 return (EACCES); 1993 1994 return (0); 1995} 1996 1997static int 1998mls_sysvmsq_check_msqctl(struct ucred *cred, struct msqid_kernel *msqkptr, 1999 struct label *msqklabel, int cmd) 2000{ 2001 struct mac_mls *subj, *obj; 2002 2003 if (!mls_enabled) 2004 return (0); 2005 2006 subj = SLOT(cred->cr_label); 2007 obj = SLOT(msqklabel); 2008 2009 switch(cmd) { 2010 case IPC_RMID: 2011 case IPC_SET: 2012 if (!mls_dominate_effective(obj, subj)) 2013 return (EACCES); 2014 break; 2015 2016 case IPC_STAT: 2017 if (!mls_dominate_effective(subj, obj)) 2018 return (EACCES); 2019 break; 2020 2021 default: 2022 return (EACCES); 2023 } 2024 2025 return (0); 2026} 2027 2028static void 2029mls_sysvmsq_cleanup(struct label *msqlabel) 2030{ 2031 2032 bzero(SLOT(msqlabel), sizeof(struct mac_mls)); 2033} 2034 2035static void 2036mls_sysvmsq_create(struct ucred *cred, struct msqid_kernel *msqkptr, 2037 struct label *msqlabel) 2038{ 2039 struct mac_mls *source, *dest; 2040 2041 source = SLOT(cred->cr_label); 2042 dest = SLOT(msqlabel); 2043 2044 mls_copy_effective(source, dest); 2045} 2046 2047static int 2048mls_sysvsem_check_semctl(struct ucred *cred, struct semid_kernel *semakptr, 2049 struct label *semaklabel, int cmd) 2050{ 2051 struct mac_mls *subj, *obj; 2052 2053 if (!mls_enabled) 2054 return (0); 2055 2056 subj = SLOT(cred->cr_label); 2057 obj = SLOT(semaklabel); 2058 2059 switch(cmd) { 2060 case IPC_RMID: 2061 case IPC_SET: 2062 case SETVAL: 2063 case SETALL: 2064 if (!mls_dominate_effective(obj, subj)) 2065 return (EACCES); 2066 break; 2067 2068 case IPC_STAT: 2069 case GETVAL: 2070 case GETPID: 2071 case GETNCNT: 2072 case GETZCNT: 2073 case GETALL: 2074 if (!mls_dominate_effective(subj, obj)) 2075 return (EACCES); 2076 break; 2077 2078 default: 2079 return (EACCES); 2080 } 2081 2082 return (0); 2083} 2084 2085static int 2086mls_sysvsem_check_semget(struct ucred *cred, struct semid_kernel *semakptr, 2087 struct label *semaklabel) 2088{ 2089 struct mac_mls *subj, *obj; 2090 2091 if (!mls_enabled) 2092 return (0); 2093 2094 subj = SLOT(cred->cr_label); 2095 obj = SLOT(semaklabel); 2096 2097 if (!mls_dominate_effective(subj, obj)) 2098 return (EACCES); 2099 2100 return (0); 2101} 2102 2103static int 2104mls_sysvsem_check_semop(struct ucred *cred, struct semid_kernel *semakptr, 2105 struct label *semaklabel, size_t accesstype) 2106{ 2107 struct mac_mls *subj, *obj; 2108 2109 if (!mls_enabled) 2110 return (0); 2111 2112 subj = SLOT(cred->cr_label); 2113 obj = SLOT(semaklabel); 2114 2115 if( accesstype & SEM_R ) 2116 if (!mls_dominate_effective(subj, obj)) 2117 return (EACCES); 2118 2119 if( accesstype & SEM_A ) 2120 if (!mls_dominate_effective(obj, subj)) 2121 return (EACCES); 2122 2123 return (0); 2124} 2125 2126static void 2127mls_sysvsem_cleanup(struct label *semalabel) 2128{ 2129 2130 bzero(SLOT(semalabel), sizeof(struct mac_mls)); 2131} 2132 2133static void 2134mls_sysvsem_create(struct ucred *cred, struct semid_kernel *semakptr, 2135 struct label *semalabel) 2136{ 2137 struct mac_mls *source, *dest; 2138 2139 source = SLOT(cred->cr_label); 2140 dest = SLOT(semalabel); 2141 2142 mls_copy_effective(source, dest); 2143} 2144 2145static int 2146mls_sysvshm_check_shmat(struct ucred *cred, struct shmid_kernel *shmsegptr, 2147 struct label *shmseglabel, int shmflg) 2148{ 2149 struct mac_mls *subj, *obj; 2150 2151 if (!mls_enabled) 2152 return (0); 2153 2154 subj = SLOT(cred->cr_label); 2155 obj = SLOT(shmseglabel); 2156 2157 if (!mls_dominate_effective(subj, obj)) 2158 return (EACCES); 2159 if ((shmflg & SHM_RDONLY) == 0) { 2160 if (!mls_dominate_effective(obj, subj)) 2161 return (EACCES); 2162 } 2163 2164 return (0); 2165} 2166 2167static int 2168mls_sysvshm_check_shmctl(struct ucred *cred, struct shmid_kernel *shmsegptr, 2169 struct label *shmseglabel, int cmd) 2170{ 2171 struct mac_mls *subj, *obj; 2172 2173 if (!mls_enabled) 2174 return (0); 2175 2176 subj = SLOT(cred->cr_label); 2177 obj = SLOT(shmseglabel); 2178 2179 switch(cmd) { 2180 case IPC_RMID: 2181 case IPC_SET: 2182 if (!mls_dominate_effective(obj, subj)) 2183 return (EACCES); 2184 break; 2185 2186 case IPC_STAT: 2187 case SHM_STAT: 2188 if (!mls_dominate_effective(subj, obj)) 2189 return (EACCES); 2190 break; 2191 2192 default: 2193 return (EACCES); 2194 } 2195 2196 return (0); 2197} 2198 2199static int 2200mls_sysvshm_check_shmget(struct ucred *cred, struct shmid_kernel *shmsegptr, 2201 struct label *shmseglabel, int shmflg) 2202{ 2203 struct mac_mls *subj, *obj; 2204 2205 if (!mls_enabled) 2206 return (0); 2207 2208 subj = SLOT(cred->cr_label); 2209 obj = SLOT(shmseglabel); 2210 2211 if (!mls_dominate_effective(obj, subj)) 2212 return (EACCES); 2213 2214 return (0); 2215} 2216 2217static void 2218mls_sysvshm_cleanup(struct label *shmlabel) 2219{ 2220 2221 bzero(SLOT(shmlabel), sizeof(struct mac_mls)); 2222} 2223 2224static void 2225mls_sysvshm_create(struct ucred *cred, struct shmid_kernel *shmsegptr, 2226 struct label *shmlabel) 2227{ 2228 struct mac_mls *source, *dest; 2229 2230 source = SLOT(cred->cr_label); 2231 dest = SLOT(shmlabel); 2232 2233 mls_copy_effective(source, dest); 2234} 2235 2236static int 2237mls_vnode_associate_extattr(struct mount *mp, struct label *mplabel, 2238 struct vnode *vp, struct label *vplabel) 2239{ 2240 struct mac_mls mm_temp, *source, *dest; 2241 int buflen, error; 2242 2243 source = SLOT(mplabel); 2244 dest = SLOT(vplabel); 2245 2246 buflen = sizeof(mm_temp); 2247 bzero(&mm_temp, buflen); 2248 2249 error = vn_extattr_get(vp, IO_NODELOCKED, MAC_MLS_EXTATTR_NAMESPACE, 2250 MAC_MLS_EXTATTR_NAME, &buflen, (char *) &mm_temp, curthread); 2251 if (error == ENOATTR || error == EOPNOTSUPP) { 2252 /* Fall back to the mntlabel. */ 2253 mls_copy_effective(source, dest); 2254 return (0); 2255 } else if (error) 2256 return (error); 2257 2258 if (buflen != sizeof(mm_temp)) { 2259 printf("mls_vnode_associate_extattr: bad size %d\n", buflen); 2260 return (EPERM); 2261 } 2262 if (mls_valid(&mm_temp) != 0) { 2263 printf("mls_vnode_associate_extattr: invalid\n"); 2264 return (EPERM); 2265 } 2266 if ((mm_temp.mm_flags & MAC_MLS_FLAGS_BOTH) != 2267 MAC_MLS_FLAG_EFFECTIVE) { 2268 printf("mls_associated_vnode_extattr: not effective\n"); 2269 return (EPERM); 2270 } 2271 2272 mls_copy_effective(&mm_temp, dest); 2273 return (0); 2274} 2275 2276static void 2277mls_vnode_associate_singlelabel(struct mount *mp, struct label *mplabel, 2278 struct vnode *vp, struct label *vplabel) 2279{ 2280 struct mac_mls *source, *dest; 2281 2282 source = SLOT(mplabel); 2283 dest = SLOT(vplabel); 2284 2285 mls_copy_effective(source, dest); 2286} 2287 2288static int 2289mls_vnode_check_chdir(struct ucred *cred, struct vnode *dvp, 2290 struct label *dvplabel) 2291{ 2292 struct mac_mls *subj, *obj; 2293 2294 if (!mls_enabled) 2295 return (0); 2296 2297 subj = SLOT(cred->cr_label); 2298 obj = SLOT(dvplabel); 2299 2300 if (!mls_dominate_effective(subj, obj)) 2301 return (EACCES); 2302 2303 return (0); 2304} 2305 2306static int 2307mls_vnode_check_chroot(struct ucred *cred, struct vnode *dvp, 2308 struct label *dvplabel) 2309{ 2310 struct mac_mls *subj, *obj; 2311 2312 if (!mls_enabled) 2313 return (0); 2314 2315 subj = SLOT(cred->cr_label); 2316 obj = SLOT(dvplabel); 2317 2318 if (!mls_dominate_effective(subj, obj)) 2319 return (EACCES); 2320 2321 return (0); 2322} 2323 2324static int 2325mls_vnode_check_create(struct ucred *cred, struct vnode *dvp, 2326 struct label *dvplabel, struct componentname *cnp, struct vattr *vap) 2327{ 2328 struct mac_mls *subj, *obj; 2329 2330 if (!mls_enabled) 2331 return (0); 2332 2333 subj = SLOT(cred->cr_label); 2334 obj = SLOT(dvplabel); 2335 2336 if (!mls_dominate_effective(obj, subj)) 2337 return (EACCES); 2338 2339 return (0); 2340} 2341 2342static int 2343mls_vnode_check_deleteacl(struct ucred *cred, struct vnode *vp, 2344 struct label *vplabel, acl_type_t type) 2345{ 2346 struct mac_mls *subj, *obj; 2347 2348 if (!mls_enabled) 2349 return (0); 2350 2351 subj = SLOT(cred->cr_label); 2352 obj = SLOT(vplabel); 2353 2354 if (!mls_dominate_effective(obj, subj)) 2355 return (EACCES); 2356 2357 return (0); 2358} 2359 2360static int 2361mls_vnode_check_deleteextattr(struct ucred *cred, struct vnode *vp, 2362 struct label *vplabel, int attrnamespace, const char *name) 2363{ 2364 struct mac_mls *subj, *obj; 2365 2366 if (!mls_enabled) 2367 return (0); 2368 2369 subj = SLOT(cred->cr_label); 2370 obj = SLOT(vplabel); 2371 2372 if (!mls_dominate_effective(obj, subj)) 2373 return (EACCES); 2374 2375 return (0); 2376} 2377 2378static int 2379mls_vnode_check_exec(struct ucred *cred, struct vnode *vp, 2380 struct label *vplabel, struct image_params *imgp, 2381 struct label *execlabel) 2382{ 2383 struct mac_mls *subj, *obj, *exec; 2384 int error; 2385 2386 if (execlabel != NULL) { 2387 /* 2388 * We currently don't permit labels to be changed at 2389 * exec-time as part of MLS, so disallow non-NULL MLS label 2390 * elements in the execlabel. 2391 */ 2392 exec = SLOT(execlabel); 2393 error = mls_atmostflags(exec, 0); 2394 if (error) 2395 return (error); 2396 } 2397 2398 if (!mls_enabled) 2399 return (0); 2400 2401 subj = SLOT(cred->cr_label); 2402 obj = SLOT(vplabel); 2403 2404 if (!mls_dominate_effective(subj, obj)) 2405 return (EACCES); 2406 2407 return (0); 2408} 2409 2410static int 2411mls_vnode_check_getacl(struct ucred *cred, struct vnode *vp, 2412 struct label *vplabel, acl_type_t type) 2413{ 2414 struct mac_mls *subj, *obj; 2415 2416 if (!mls_enabled) 2417 return (0); 2418 2419 subj = SLOT(cred->cr_label); 2420 obj = SLOT(vplabel); 2421 2422 if (!mls_dominate_effective(subj, obj)) 2423 return (EACCES); 2424 2425 return (0); 2426} 2427 2428static int 2429mls_vnode_check_getextattr(struct ucred *cred, struct vnode *vp, 2430 struct label *vplabel, int attrnamespace, const char *name) 2431{ 2432 struct mac_mls *subj, *obj; 2433 2434 if (!mls_enabled) 2435 return (0); 2436 2437 subj = SLOT(cred->cr_label); 2438 obj = SLOT(vplabel); 2439 2440 if (!mls_dominate_effective(subj, obj)) 2441 return (EACCES); 2442 2443 return (0); 2444} 2445 2446static int 2447mls_vnode_check_link(struct ucred *cred, struct vnode *dvp, 2448 struct label *dvplabel, struct vnode *vp, struct label *vplabel, 2449 struct componentname *cnp) 2450{ 2451 struct mac_mls *subj, *obj; 2452 2453 if (!mls_enabled) 2454 return (0); 2455 2456 subj = SLOT(cred->cr_label); 2457 obj = SLOT(dvplabel); 2458 2459 if (!mls_dominate_effective(obj, subj)) 2460 return (EACCES); 2461 2462 obj = SLOT(vplabel); 2463 if (!mls_dominate_effective(obj, subj)) 2464 return (EACCES); 2465 2466 return (0); 2467} 2468 2469static int 2470mls_vnode_check_listextattr(struct ucred *cred, struct vnode *vp, 2471 struct label *vplabel, int attrnamespace) 2472{ 2473 2474 struct mac_mls *subj, *obj; 2475 2476 if (!mls_enabled) 2477 return (0); 2478 2479 subj = SLOT(cred->cr_label); 2480 obj = SLOT(vplabel); 2481 2482 if (!mls_dominate_effective(subj, obj)) 2483 return (EACCES); 2484 2485 return (0); 2486} 2487 2488static int 2489mls_vnode_check_lookup(struct ucred *cred, struct vnode *dvp, 2490 struct label *dvplabel, struct componentname *cnp) 2491{ 2492 struct mac_mls *subj, *obj; 2493 2494 if (!mls_enabled) 2495 return (0); 2496 2497 subj = SLOT(cred->cr_label); 2498 obj = SLOT(dvplabel); 2499 2500 if (!mls_dominate_effective(subj, obj)) 2501 return (EACCES); 2502 2503 return (0); 2504} 2505 2506static int 2507mls_vnode_check_mmap(struct ucred *cred, struct vnode *vp, 2508 struct label *vplabel, int prot, int flags) 2509{ 2510 struct mac_mls *subj, *obj; 2511 2512 /* 2513 * Rely on the use of open()-time protections to handle 2514 * non-revocation cases. 2515 */ 2516 if (!mls_enabled || !revocation_enabled) 2517 return (0); 2518 2519 subj = SLOT(cred->cr_label); 2520 obj = SLOT(vplabel); 2521 2522 if (prot & (VM_PROT_READ | VM_PROT_EXECUTE)) { 2523 if (!mls_dominate_effective(subj, obj)) 2524 return (EACCES); 2525 } 2526 if (((prot & VM_PROT_WRITE) != 0) && ((flags & MAP_SHARED) != 0)) { 2527 if (!mls_dominate_effective(obj, subj)) 2528 return (EACCES); 2529 } 2530 2531 return (0); 2532} 2533 2534static int 2535mls_vnode_check_open(struct ucred *cred, struct vnode *vp, 2536 struct label *vplabel, accmode_t accmode) 2537{ 2538 struct mac_mls *subj, *obj; 2539 2540 if (!mls_enabled) 2541 return (0); 2542 2543 subj = SLOT(cred->cr_label); 2544 obj = SLOT(vplabel); 2545 2546 /* XXX privilege override for admin? */ 2547 if (accmode & (VREAD | VEXEC | VSTAT_PERMS)) { 2548 if (!mls_dominate_effective(subj, obj)) 2549 return (EACCES); 2550 } 2551 if (accmode & VMODIFY_PERMS) { 2552 if (!mls_dominate_effective(obj, subj)) 2553 return (EACCES); 2554 } 2555 2556 return (0); 2557} 2558 2559static int 2560mls_vnode_check_poll(struct ucred *active_cred, struct ucred *file_cred, 2561 struct vnode *vp, struct label *vplabel) 2562{ 2563 struct mac_mls *subj, *obj; 2564 2565 if (!mls_enabled || !revocation_enabled) 2566 return (0); 2567 2568 subj = SLOT(active_cred->cr_label); 2569 obj = SLOT(vplabel); 2570 2571 if (!mls_dominate_effective(subj, obj)) 2572 return (EACCES); 2573 2574 return (0); 2575} 2576 2577static int 2578mls_vnode_check_read(struct ucred *active_cred, struct ucred *file_cred, 2579 struct vnode *vp, struct label *vplabel) 2580{ 2581 struct mac_mls *subj, *obj; 2582 2583 if (!mls_enabled || !revocation_enabled) 2584 return (0); 2585 2586 subj = SLOT(active_cred->cr_label); 2587 obj = SLOT(vplabel); 2588 2589 if (!mls_dominate_effective(subj, obj)) 2590 return (EACCES); 2591 2592 return (0); 2593} 2594 2595static int 2596mls_vnode_check_readdir(struct ucred *cred, struct vnode *dvp, 2597 struct label *dvplabel) 2598{ 2599 struct mac_mls *subj, *obj; 2600 2601 if (!mls_enabled) 2602 return (0); 2603 2604 subj = SLOT(cred->cr_label); 2605 obj = SLOT(dvplabel); 2606 2607 if (!mls_dominate_effective(subj, obj)) 2608 return (EACCES); 2609 2610 return (0); 2611} 2612 2613static int 2614mls_vnode_check_readlink(struct ucred *cred, struct vnode *vp, 2615 struct label *vplabel) 2616{ 2617 struct mac_mls *subj, *obj; 2618 2619 if (!mls_enabled) 2620 return (0); 2621 2622 subj = SLOT(cred->cr_label); 2623 obj = SLOT(vplabel); 2624 2625 if (!mls_dominate_effective(subj, obj)) 2626 return (EACCES); 2627 2628 return (0); 2629} 2630 2631static int 2632mls_vnode_check_relabel(struct ucred *cred, struct vnode *vp, 2633 struct label *vplabel, struct label *newlabel) 2634{ 2635 struct mac_mls *old, *new, *subj; 2636 int error; 2637 2638 old = SLOT(vplabel); 2639 new = SLOT(newlabel); 2640 subj = SLOT(cred->cr_label); 2641 2642 /* 2643 * If there is an MLS label update for the vnode, it must be a 2644 * effective label. 2645 */ 2646 error = mls_atmostflags(new, MAC_MLS_FLAG_EFFECTIVE); 2647 if (error) 2648 return (error); 2649 2650 /* 2651 * To perform a relabel of the vnode (MLS label or not), MLS must 2652 * authorize the relabel. 2653 */ 2654 if (!mls_effective_in_range(old, subj)) 2655 return (EPERM); 2656 2657 /* 2658 * If the MLS label is to be changed, authorize as appropriate. 2659 */ 2660 if (new->mm_flags & MAC_MLS_FLAG_EFFECTIVE) { 2661 /* 2662 * To change the MLS label on a vnode, the new vnode label 2663 * must be in the subject range. 2664 */ 2665 if (!mls_effective_in_range(new, subj)) 2666 return (EPERM); 2667 2668 /* 2669 * To change the MLS label on the vnode to be EQUAL, the 2670 * subject must have appropriate privilege. 2671 */ 2672 if (mls_contains_equal(new)) { 2673 error = mls_subject_privileged(subj); 2674 if (error) 2675 return (error); 2676 } 2677 } 2678 2679 return (0); 2680} 2681 2682static int 2683mls_vnode_check_rename_from(struct ucred *cred, struct vnode *dvp, 2684 struct label *dvplabel, struct vnode *vp, struct label *vplabel, 2685 struct componentname *cnp) 2686{ 2687 struct mac_mls *subj, *obj; 2688 2689 if (!mls_enabled) 2690 return (0); 2691 2692 subj = SLOT(cred->cr_label); 2693 obj = SLOT(dvplabel); 2694 2695 if (!mls_dominate_effective(obj, subj)) 2696 return (EACCES); 2697 2698 obj = SLOT(vplabel); 2699 2700 if (!mls_dominate_effective(obj, subj)) 2701 return (EACCES); 2702 2703 return (0); 2704} 2705 2706static int 2707mls_vnode_check_rename_to(struct ucred *cred, struct vnode *dvp, 2708 struct label *dvplabel, struct vnode *vp, struct label *vplabel, 2709 int samedir, struct componentname *cnp) 2710{ 2711 struct mac_mls *subj, *obj; 2712 2713 if (!mls_enabled) 2714 return (0); 2715 2716 subj = SLOT(cred->cr_label); 2717 obj = SLOT(dvplabel); 2718 2719 if (!mls_dominate_effective(obj, subj)) 2720 return (EACCES); 2721 2722 if (vp != NULL) { 2723 obj = SLOT(vplabel); 2724 2725 if (!mls_dominate_effective(obj, subj)) 2726 return (EACCES); 2727 } 2728 2729 return (0); 2730} 2731 2732static int 2733mls_vnode_check_revoke(struct ucred *cred, struct vnode *vp, 2734 struct label *vplabel) 2735{ 2736 struct mac_mls *subj, *obj; 2737 2738 if (!mls_enabled) 2739 return (0); 2740 2741 subj = SLOT(cred->cr_label); 2742 obj = SLOT(vplabel); 2743 2744 if (!mls_dominate_effective(obj, subj)) 2745 return (EACCES); 2746 2747 return (0); 2748} 2749 2750static int 2751mls_vnode_check_setacl(struct ucred *cred, struct vnode *vp, 2752 struct label *vplabel, acl_type_t type, struct acl *acl) 2753{ 2754 struct mac_mls *subj, *obj; 2755 2756 if (!mls_enabled) 2757 return (0); 2758 2759 subj = SLOT(cred->cr_label); 2760 obj = SLOT(vplabel); 2761 2762 if (!mls_dominate_effective(obj, subj)) 2763 return (EACCES); 2764 2765 return (0); 2766} 2767 2768static int 2769mls_vnode_check_setextattr(struct ucred *cred, struct vnode *vp, 2770 struct label *vplabel, int attrnamespace, const char *name) 2771{ 2772 struct mac_mls *subj, *obj; 2773 2774 if (!mls_enabled) 2775 return (0); 2776 2777 subj = SLOT(cred->cr_label); 2778 obj = SLOT(vplabel); 2779 2780 if (!mls_dominate_effective(obj, subj)) 2781 return (EACCES); 2782 2783 /* XXX: protect the MAC EA in a special way? */ 2784 2785 return (0); 2786} 2787 2788static int 2789mls_vnode_check_setflags(struct ucred *cred, struct vnode *vp, 2790 struct label *vplabel, u_long flags) 2791{ 2792 struct mac_mls *subj, *obj; 2793 2794 if (!mls_enabled) 2795 return (0); 2796 2797 subj = SLOT(cred->cr_label); 2798 obj = SLOT(vplabel); 2799 2800 if (!mls_dominate_effective(obj, subj)) 2801 return (EACCES); 2802 2803 return (0); 2804} 2805 2806static int 2807mls_vnode_check_setmode(struct ucred *cred, struct vnode *vp, 2808 struct label *vplabel, mode_t mode) 2809{ 2810 struct mac_mls *subj, *obj; 2811 2812 if (!mls_enabled) 2813 return (0); 2814 2815 subj = SLOT(cred->cr_label); 2816 obj = SLOT(vplabel); 2817 2818 if (!mls_dominate_effective(obj, subj)) 2819 return (EACCES); 2820 2821 return (0); 2822} 2823 2824static int 2825mls_vnode_check_setowner(struct ucred *cred, struct vnode *vp, 2826 struct label *vplabel, uid_t uid, gid_t gid) 2827{ 2828 struct mac_mls *subj, *obj; 2829 2830 if (!mls_enabled) 2831 return (0); 2832 2833 subj = SLOT(cred->cr_label); 2834 obj = SLOT(vplabel); 2835 2836 if (!mls_dominate_effective(obj, subj)) 2837 return (EACCES); 2838 2839 return (0); 2840} 2841 2842static int 2843mls_vnode_check_setutimes(struct ucred *cred, struct vnode *vp, 2844 struct label *vplabel, struct timespec atime, struct timespec mtime) 2845{ 2846 struct mac_mls *subj, *obj; 2847 2848 if (!mls_enabled) 2849 return (0); 2850 2851 subj = SLOT(cred->cr_label); 2852 obj = SLOT(vplabel); 2853 2854 if (!mls_dominate_effective(obj, subj)) 2855 return (EACCES); 2856 2857 return (0); 2858} 2859 2860static int 2861mls_vnode_check_stat(struct ucred *active_cred, struct ucred *file_cred, 2862 struct vnode *vp, struct label *vplabel) 2863{ 2864 struct mac_mls *subj, *obj; 2865 2866 if (!mls_enabled) 2867 return (0); 2868 2869 subj = SLOT(active_cred->cr_label); 2870 obj = SLOT(vplabel); 2871 2872 if (!mls_dominate_effective(subj, obj)) 2873 return (EACCES); 2874 2875 return (0); 2876} 2877 2878static int 2879mls_vnode_check_unlink(struct ucred *cred, struct vnode *dvp, 2880 struct label *dvplabel, struct vnode *vp, struct label *vplabel, 2881 struct componentname *cnp) 2882{ 2883 struct mac_mls *subj, *obj; 2884 2885 if (!mls_enabled) 2886 return (0); 2887 2888 subj = SLOT(cred->cr_label); 2889 obj = SLOT(dvplabel); 2890 2891 if (!mls_dominate_effective(obj, subj)) 2892 return (EACCES); 2893 2894 obj = SLOT(vplabel); 2895 2896 if (!mls_dominate_effective(obj, subj)) 2897 return (EACCES); 2898 2899 return (0); 2900} 2901 2902static int 2903mls_vnode_check_write(struct ucred *active_cred, struct ucred *file_cred, 2904 struct vnode *vp, struct label *vplabel) 2905{ 2906 struct mac_mls *subj, *obj; 2907 2908 if (!mls_enabled || !revocation_enabled) 2909 return (0); 2910 2911 subj = SLOT(active_cred->cr_label); 2912 obj = SLOT(vplabel); 2913 2914 if (!mls_dominate_effective(obj, subj)) 2915 return (EACCES); 2916 2917 return (0); 2918} 2919 2920static int 2921mls_vnode_create_extattr(struct ucred *cred, struct mount *mp, 2922 struct label *mplabel, struct vnode *dvp, struct label *dvplabel, 2923 struct vnode *vp, struct label *vplabel, struct componentname *cnp) 2924{ 2925 struct mac_mls *source, *dest, mm_temp; 2926 size_t buflen; 2927 int error; 2928 2929 buflen = sizeof(mm_temp); 2930 bzero(&mm_temp, buflen); 2931 2932 source = SLOT(cred->cr_label); 2933 dest = SLOT(vplabel); 2934 mls_copy_effective(source, &mm_temp); 2935 2936 error = vn_extattr_set(vp, IO_NODELOCKED, MAC_MLS_EXTATTR_NAMESPACE, 2937 MAC_MLS_EXTATTR_NAME, buflen, (char *) &mm_temp, curthread); 2938 if (error == 0) 2939 mls_copy_effective(source, dest); 2940 return (error); 2941} 2942 2943static void 2944mls_vnode_relabel(struct ucred *cred, struct vnode *vp, 2945 struct label *vplabel, struct label *label) 2946{ 2947 struct mac_mls *source, *dest; 2948 2949 source = SLOT(label); 2950 dest = SLOT(vplabel); 2951 2952 mls_copy(source, dest); 2953} 2954 2955static int 2956mls_vnode_setlabel_extattr(struct ucred *cred, struct vnode *vp, 2957 struct label *vplabel, struct label *intlabel) 2958{ 2959 struct mac_mls *source, mm_temp; 2960 size_t buflen; 2961 int error; 2962 2963 buflen = sizeof(mm_temp); 2964 bzero(&mm_temp, buflen); 2965 2966 source = SLOT(intlabel); 2967 if ((source->mm_flags & MAC_MLS_FLAG_EFFECTIVE) == 0) 2968 return (0); 2969 2970 mls_copy_effective(source, &mm_temp); 2971 2972 error = vn_extattr_set(vp, IO_NODELOCKED, MAC_MLS_EXTATTR_NAMESPACE, 2973 MAC_MLS_EXTATTR_NAME, buflen, (char *) &mm_temp, curthread); 2974 return (error); 2975} 2976 2977static struct mac_policy_ops mls_ops = 2978{ 2979 .mpo_init = mls_init, 2980 2981 .mpo_bpfdesc_check_receive = mls_bpfdesc_check_receive, 2982 .mpo_bpfdesc_create = mls_bpfdesc_create, 2983 .mpo_bpfdesc_create_mbuf = mls_bpfdesc_create_mbuf, 2984 .mpo_bpfdesc_destroy_label = mls_destroy_label, 2985 .mpo_bpfdesc_init_label = mls_init_label, 2986 2987 .mpo_cred_associate_nfsd = mls_cred_associate_nfsd, 2988 .mpo_cred_check_relabel = mls_cred_check_relabel, 2989 .mpo_cred_check_visible = mls_cred_check_visible, 2990 .mpo_cred_copy_label = mls_copy_label, 2991 .mpo_cred_create_init = mls_cred_create_init, 2992 .mpo_cred_create_swapper = mls_cred_create_swapper, 2993 .mpo_cred_destroy_label = mls_destroy_label, 2994 .mpo_cred_externalize_label = mls_externalize_label, 2995 .mpo_cred_init_label = mls_init_label, 2996 .mpo_cred_internalize_label = mls_internalize_label, 2997 .mpo_cred_relabel = mls_cred_relabel, 2998 2999 .mpo_devfs_create_device = mls_devfs_create_device, 3000 .mpo_devfs_create_directory = mls_devfs_create_directory, 3001 .mpo_devfs_create_symlink = mls_devfs_create_symlink, 3002 .mpo_devfs_destroy_label = mls_destroy_label, 3003 .mpo_devfs_init_label = mls_init_label, 3004 .mpo_devfs_update = mls_devfs_update, 3005 .mpo_devfs_vnode_associate = mls_devfs_vnode_associate, 3006 3007 .mpo_ifnet_check_relabel = mls_ifnet_check_relabel, 3008 .mpo_ifnet_check_transmit = mls_ifnet_check_transmit, 3009 .mpo_ifnet_copy_label = mls_copy_label, 3010 .mpo_ifnet_create = mls_ifnet_create, 3011 .mpo_ifnet_create_mbuf = mls_ifnet_create_mbuf, 3012 .mpo_ifnet_destroy_label = mls_destroy_label, 3013 .mpo_ifnet_externalize_label = mls_externalize_label, 3014 .mpo_ifnet_init_label = mls_init_label, 3015 .mpo_ifnet_internalize_label = mls_internalize_label, 3016 .mpo_ifnet_relabel = mls_ifnet_relabel, 3017 3018 .mpo_inpcb_check_deliver = mls_inpcb_check_deliver, 3019 .mpo_inpcb_check_visible = mls_inpcb_check_visible, 3020 .mpo_inpcb_create = mls_inpcb_create, 3021 .mpo_inpcb_create_mbuf = mls_inpcb_create_mbuf, 3022 .mpo_inpcb_destroy_label = mls_destroy_label, 3023 .mpo_inpcb_init_label = mls_init_label_waitcheck, 3024 .mpo_inpcb_sosetlabel = mls_inpcb_sosetlabel, 3025 3026 .mpo_ip6q_create = mls_ip6q_create, 3027 .mpo_ip6q_destroy_label = mls_destroy_label, 3028 .mpo_ip6q_init_label = mls_init_label_waitcheck, 3029 .mpo_ip6q_match = mls_ip6q_match, 3030 .mpo_ip6q_reassemble = mls_ip6q_reassemble, 3031 .mpo_ip6q_update = mls_ip6q_update, 3032 3033 .mpo_ipq_create = mls_ipq_create, 3034 .mpo_ipq_destroy_label = mls_destroy_label, 3035 .mpo_ipq_init_label = mls_init_label_waitcheck, 3036 .mpo_ipq_match = mls_ipq_match, 3037 .mpo_ipq_reassemble = mls_ipq_reassemble, 3038 .mpo_ipq_update = mls_ipq_update, 3039 3040 .mpo_mbuf_copy_label = mls_copy_label, 3041 .mpo_mbuf_destroy_label = mls_destroy_label, 3042 .mpo_mbuf_init_label = mls_init_label_waitcheck, 3043 3044 .mpo_mount_check_stat = mls_mount_check_stat, 3045 .mpo_mount_create = mls_mount_create, 3046 .mpo_mount_destroy_label = mls_destroy_label, 3047 .mpo_mount_init_label = mls_init_label, 3048 3049 .mpo_netatalk_aarp_send = mls_netatalk_aarp_send, 3050 3051 .mpo_netinet_arp_send = mls_netinet_arp_send, 3052 .mpo_netinet_firewall_reply = mls_netinet_firewall_reply, 3053 .mpo_netinet_firewall_send = mls_netinet_firewall_send, 3054 .mpo_netinet_fragment = mls_netinet_fragment, 3055 .mpo_netinet_icmp_reply = mls_netinet_icmp_reply, 3056 .mpo_netinet_igmp_send = mls_netinet_igmp_send, 3057 3058 .mpo_netinet6_nd6_send = mls_netinet6_nd6_send, 3059 3060 .mpo_pipe_check_ioctl = mls_pipe_check_ioctl, 3061 .mpo_pipe_check_poll = mls_pipe_check_poll, 3062 .mpo_pipe_check_read = mls_pipe_check_read, 3063 .mpo_pipe_check_relabel = mls_pipe_check_relabel, 3064 .mpo_pipe_check_stat = mls_pipe_check_stat, 3065 .mpo_pipe_check_write = mls_pipe_check_write, 3066 .mpo_pipe_copy_label = mls_copy_label, 3067 .mpo_pipe_create = mls_pipe_create, 3068 .mpo_pipe_destroy_label = mls_destroy_label, 3069 .mpo_pipe_externalize_label = mls_externalize_label, 3070 .mpo_pipe_init_label = mls_init_label, 3071 .mpo_pipe_internalize_label = mls_internalize_label, 3072 .mpo_pipe_relabel = mls_pipe_relabel, 3073 3074 .mpo_posixsem_check_getvalue = mls_posixsem_check_rdonly, 3075 .mpo_posixsem_check_open = mls_posixsem_check_openunlink, 3076 .mpo_posixsem_check_post = mls_posixsem_check_write, 3077 .mpo_posixsem_check_stat = mls_posixsem_check_rdonly, 3078 .mpo_posixsem_check_unlink = mls_posixsem_check_openunlink, 3079 .mpo_posixsem_check_wait = mls_posixsem_check_write, 3080 .mpo_posixsem_create = mls_posixsem_create, 3081 .mpo_posixsem_destroy_label = mls_destroy_label, 3082 .mpo_posixsem_init_label = mls_init_label, 3083 3084 .mpo_proc_check_debug = mls_proc_check_debug, 3085 .mpo_proc_check_sched = mls_proc_check_sched, 3086 .mpo_proc_check_signal = mls_proc_check_signal, 3087 3088 .mpo_socket_check_deliver = mls_socket_check_deliver, 3089 .mpo_socket_check_relabel = mls_socket_check_relabel, 3090 .mpo_socket_check_visible = mls_socket_check_visible, 3091 .mpo_socket_copy_label = mls_copy_label, 3092 .mpo_socket_create = mls_socket_create, 3093 .mpo_socket_create_mbuf = mls_socket_create_mbuf, 3094 .mpo_socket_destroy_label = mls_destroy_label, 3095 .mpo_socket_externalize_label = mls_externalize_label, 3096 .mpo_socket_init_label = mls_init_label_waitcheck, 3097 .mpo_socket_internalize_label = mls_internalize_label, 3098 .mpo_socket_newconn = mls_socket_newconn, 3099 .mpo_socket_relabel = mls_socket_relabel, 3100 3101 .mpo_socketpeer_destroy_label = mls_destroy_label, 3102 .mpo_socketpeer_externalize_label = mls_externalize_label, 3103 .mpo_socketpeer_init_label = mls_init_label_waitcheck, 3104 .mpo_socketpeer_set_from_mbuf = mls_socketpeer_set_from_mbuf, 3105 .mpo_socketpeer_set_from_socket = mls_socketpeer_set_from_socket, 3106 3107 .mpo_syncache_create = mls_syncache_create, 3108 .mpo_syncache_create_mbuf = mls_syncache_create_mbuf, 3109 .mpo_syncache_destroy_label = mls_destroy_label, 3110 .mpo_syncache_init_label = mls_init_label_waitcheck, 3111 3112 .mpo_sysvmsg_cleanup = mls_sysvmsg_cleanup, 3113 .mpo_sysvmsg_create = mls_sysvmsg_create, 3114 .mpo_sysvmsg_destroy_label = mls_destroy_label, 3115 .mpo_sysvmsg_init_label = mls_init_label, 3116 3117 .mpo_sysvmsq_check_msgrcv = mls_sysvmsq_check_msgrcv, 3118 .mpo_sysvmsq_check_msgrmid = mls_sysvmsq_check_msgrmid, 3119 .mpo_sysvmsq_check_msqget = mls_sysvmsq_check_msqget, 3120 .mpo_sysvmsq_check_msqsnd = mls_sysvmsq_check_msqsnd, 3121 .mpo_sysvmsq_check_msqrcv = mls_sysvmsq_check_msqrcv, 3122 .mpo_sysvmsq_check_msqctl = mls_sysvmsq_check_msqctl, 3123 .mpo_sysvmsq_cleanup = mls_sysvmsq_cleanup, 3124 .mpo_sysvmsq_destroy_label = mls_destroy_label, 3125 .mpo_sysvmsq_init_label = mls_init_label, 3126 .mpo_sysvmsq_create = mls_sysvmsq_create, 3127 3128 .mpo_sysvsem_check_semctl = mls_sysvsem_check_semctl, 3129 .mpo_sysvsem_check_semget = mls_sysvsem_check_semget, 3130 .mpo_sysvsem_check_semop = mls_sysvsem_check_semop, 3131 .mpo_sysvsem_cleanup = mls_sysvsem_cleanup, 3132 .mpo_sysvsem_create = mls_sysvsem_create, 3133 .mpo_sysvsem_destroy_label = mls_destroy_label, 3134 .mpo_sysvsem_init_label = mls_init_label, 3135 3136 .mpo_sysvshm_check_shmat = mls_sysvshm_check_shmat, 3137 .mpo_sysvshm_check_shmctl = mls_sysvshm_check_shmctl, 3138 .mpo_sysvshm_check_shmget = mls_sysvshm_check_shmget, 3139 .mpo_sysvshm_cleanup = mls_sysvshm_cleanup, 3140 .mpo_sysvshm_create = mls_sysvshm_create, 3141 .mpo_sysvshm_destroy_label = mls_destroy_label, 3142 .mpo_sysvshm_init_label = mls_init_label, 3143 3144 3145 .mpo_system_check_acct = mls_system_check_acct, 3146 .mpo_system_check_auditctl = mls_system_check_auditctl, 3147 .mpo_system_check_swapon = mls_system_check_swapon, 3148 3149 .mpo_vnode_associate_extattr = mls_vnode_associate_extattr, 3150 .mpo_vnode_associate_singlelabel = mls_vnode_associate_singlelabel, 3151 .mpo_vnode_check_access = mls_vnode_check_open, 3152 .mpo_vnode_check_chdir = mls_vnode_check_chdir, 3153 .mpo_vnode_check_chroot = mls_vnode_check_chroot, 3154 .mpo_vnode_check_create = mls_vnode_check_create, 3155 .mpo_vnode_check_deleteacl = mls_vnode_check_deleteacl, 3156 .mpo_vnode_check_deleteextattr = mls_vnode_check_deleteextattr, 3157 .mpo_vnode_check_exec = mls_vnode_check_exec, 3158 .mpo_vnode_check_getacl = mls_vnode_check_getacl, 3159 .mpo_vnode_check_getextattr = mls_vnode_check_getextattr, 3160 .mpo_vnode_check_link = mls_vnode_check_link, 3161 .mpo_vnode_check_listextattr = mls_vnode_check_listextattr, 3162 .mpo_vnode_check_lookup = mls_vnode_check_lookup, 3163 .mpo_vnode_check_mmap = mls_vnode_check_mmap, 3164 .mpo_vnode_check_open = mls_vnode_check_open, 3165 .mpo_vnode_check_poll = mls_vnode_check_poll, 3166 .mpo_vnode_check_read = mls_vnode_check_read, 3167 .mpo_vnode_check_readdir = mls_vnode_check_readdir, 3168 .mpo_vnode_check_readlink = mls_vnode_check_readlink, 3169 .mpo_vnode_check_relabel = mls_vnode_check_relabel, 3170 .mpo_vnode_check_rename_from = mls_vnode_check_rename_from, 3171 .mpo_vnode_check_rename_to = mls_vnode_check_rename_to, 3172 .mpo_vnode_check_revoke = mls_vnode_check_revoke, 3173 .mpo_vnode_check_setacl = mls_vnode_check_setacl, 3174 .mpo_vnode_check_setextattr = mls_vnode_check_setextattr, 3175 .mpo_vnode_check_setflags = mls_vnode_check_setflags, 3176 .mpo_vnode_check_setmode = mls_vnode_check_setmode, 3177 .mpo_vnode_check_setowner = mls_vnode_check_setowner, 3178 .mpo_vnode_check_setutimes = mls_vnode_check_setutimes, 3179 .mpo_vnode_check_stat = mls_vnode_check_stat, 3180 .mpo_vnode_check_unlink = mls_vnode_check_unlink, 3181 .mpo_vnode_check_write = mls_vnode_check_write, 3182 .mpo_vnode_copy_label = mls_copy_label, 3183 .mpo_vnode_create_extattr = mls_vnode_create_extattr, 3184 .mpo_vnode_destroy_label = mls_destroy_label, 3185 .mpo_vnode_externalize_label = mls_externalize_label, 3186 .mpo_vnode_init_label = mls_init_label, 3187 .mpo_vnode_internalize_label = mls_internalize_label, 3188 .mpo_vnode_relabel = mls_vnode_relabel, 3189 .mpo_vnode_setlabel_extattr = mls_vnode_setlabel_extattr, 3190}; 3191 3192MAC_POLICY_SET(&mls_ops, mac_mls, "TrustedBSD MAC/MLS", 3193 MPC_LOADTIME_FLAG_NOTLATE, &mls_slot); 3194