mac_vfs.c revision 191731
11553Srgrimes/*- 21553Srgrimes * Copyright (c) 1999-2002, 2009 Robert N. M. Watson 31553Srgrimes * Copyright (c) 2001 Ilmar S. Habibulin 41553Srgrimes * Copyright (c) 2001-2005 McAfee, Inc. 51553Srgrimes * Copyright (c) 2005-2006 SPARTA, Inc. 61553Srgrimes * Copyright (c) 2008 Apple Inc. 71553Srgrimes * All rights reserved. 81553Srgrimes * 91553Srgrimes * This software was developed by Robert Watson and Ilmar Habibulin for the 101553Srgrimes * TrustedBSD Project. 111553Srgrimes * 121553Srgrimes * This software was developed for the FreeBSD Project in part by McAfee 13121300Sphk * Research, the Security Research Division of McAfee, Inc. under 141553Srgrimes * DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA 151553Srgrimes * CHATS research program. 161553Srgrimes * 171553Srgrimes * This software was enhanced by SPARTA ISSO under SPAWAR contract 181553Srgrimes * N66001-04-C-6019 ("SEFOS"). 191553Srgrimes * 201553Srgrimes * This software was developed at the University of Cambridge Computer 211553Srgrimes * Laboratory with support from a grant from Google, Inc. 221553Srgrimes * 231553Srgrimes * Redistribution and use in source and binary forms, with or without 241553Srgrimes * modification, are permitted provided that the following conditions 251553Srgrimes * are met: 261553Srgrimes * 1. Redistributions of source code must retain the above copyright 271553Srgrimes * notice, this list of conditions and the following disclaimer. 281553Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 291553Srgrimes * notice, this list of conditions and the following disclaimer in the 30114601Sobrien * documentation and/or other materials provided with the distribution. 311553Srgrimes * 321553Srgrimes * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 33114601Sobrien * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 3430027Scharnier * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 35114601Sobrien * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 36114601Sobrien * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 371553Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 381553Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 391553Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 4030027Scharnier * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 4130027Scharnier * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 4230027Scharnier * SUCH DAMAGE. 431553Srgrimes */ 4430027Scharnier 451553Srgrimes#include <sys/cdefs.h> 4630027Scharnier__FBSDID("$FreeBSD: head/sys/security/mac/mac_vfs.c 191731 2009-05-01 21:05:40Z rwatson $"); 471553Srgrimes 4842561Sjkoshy#include "opt_kdtrace.h" 491553Srgrimes#include "opt_mac.h" 501553Srgrimes 511553Srgrimes#include <sys/param.h> 521553Srgrimes#include <sys/condvar.h> 531553Srgrimes#include <sys/extattr.h> 5499800Salfred#include <sys/imgact.h> 5599800Salfred#include <sys/kernel.h> 561553Srgrimes#include <sys/lock.h> 571553Srgrimes#include <sys/malloc.h> 58122135Sphk#include <sys/mutex.h> 591553Srgrimes#include <sys/proc.h> 60121299Sphk#include <sys/sbuf.h> 61121299Sphk#include <sys/systm.h> 621553Srgrimes#include <sys/vnode.h> 631553Srgrimes#include <sys/mount.h> 641553Srgrimes#include <sys/file.h> 651553Srgrimes#include <sys/namei.h> 662860Srgrimes#include <sys/sdt.h> 671553Srgrimes#include <sys/sysctl.h> 681553Srgrimes 69122135Sphk#include <vm/vm.h> 701553Srgrimes#include <vm/pmap.h> 711553Srgrimes#include <vm/vm_map.h> 721553Srgrimes#include <vm/vm_object.h> 731553Srgrimes 741553Srgrimes#include <fs/devfs/devfs.h> 751553Srgrimes 76229403Sed#include <security/mac/mac_framework.h> 7730027Scharnier#include <security/mac/mac_internal.h> 781553Srgrimes#include <security/mac/mac_policy.h> 791553Srgrimes 801553Srgrimes/* 811553Srgrimes * Warn about EA transactions only the first time they happen. No locking on 821553Srgrimes * this variable. 831553Srgrimes */ 841553Srgrimesstatic int ea_warn_once = 0; 851553Srgrimes 861553Srgrimesstatic int mac_vnode_setlabel_extattr(struct ucred *cred, 871553Srgrimes struct vnode *vp, struct label *intlabel); 881553Srgrimes 891553Srgrimesstatic struct label * 901553Srgrimesmac_devfs_label_alloc(void) 911553Srgrimes{ 921553Srgrimes struct label *label; 931553Srgrimes 941553Srgrimes label = mac_labelzone_alloc(M_WAITOK); 951553Srgrimes MAC_POLICY_PERFORM(devfs_init_label, label); 961553Srgrimes return (label); 971553Srgrimes} 981553Srgrimes 991553Srgrimesvoid 1001553Srgrimesmac_devfs_init(struct devfs_dirent *de) 1011553Srgrimes{ 1028857Srgrimes 1031553Srgrimes if (mac_labeled & MPC_OBJECT_DEVFS) 1041553Srgrimes de->de_label = mac_devfs_label_alloc(); 10530027Scharnier else 1061553Srgrimes de->de_label = NULL; 1071553Srgrimes} 1081553Srgrimes 1091553Srgrimesstatic struct label * 1101553Srgrimesmac_mount_label_alloc(void) 1111553Srgrimes{ 1121553Srgrimes struct label *label; 1131553Srgrimes 1141553Srgrimes label = mac_labelzone_alloc(M_WAITOK); 1151553Srgrimes MAC_POLICY_PERFORM(mount_init_label, label); 1161553Srgrimes return (label); 1171553Srgrimes} 1181553Srgrimes 1191553Srgrimesvoid 1201553Srgrimesmac_mount_init(struct mount *mp) 121229403Sed{ 12230027Scharnier 12330027Scharnier if (mac_labeled & MPC_OBJECT_MOUNT) 1241553Srgrimes mp->mnt_label = mac_mount_label_alloc(); 1251553Srgrimes else 1261553Srgrimes mp->mnt_label = NULL; 1271553Srgrimes} 1281553Srgrimes 1291553Srgrimesstruct label * 1301553Srgrimesmac_vnode_label_alloc(void) 1311553Srgrimes{ 1321553Srgrimes struct label *label; 1331553Srgrimes 1341553Srgrimes label = mac_labelzone_alloc(M_WAITOK); 1351553Srgrimes MAC_POLICY_PERFORM(vnode_init_label, label); 1361553Srgrimes return (label); 13730027Scharnier} 1381553Srgrimes 1391553Srgrimesvoid 1401553Srgrimesmac_vnode_init(struct vnode *vp) 14130027Scharnier{ 1421553Srgrimes 1431553Srgrimes if (mac_labeled & MPC_OBJECT_VNODE) 1441553Srgrimes vp->v_label = mac_vnode_label_alloc(); 1451553Srgrimes else 146121734Sphk vp->v_label = NULL; 147121734Sphk} 1481553Srgrimes 1491553Srgrimesstatic void 1501553Srgrimesmac_devfs_label_free(struct label *label) 1511553Srgrimes{ 1521553Srgrimes 1531553Srgrimes MAC_POLICY_PERFORM_NOSLEEP(devfs_destroy_label, label); 1541553Srgrimes mac_labelzone_free(label); 1551553Srgrimes} 1561553Srgrimes 1571553Srgrimesvoid 1581553Srgrimesmac_devfs_destroy(struct devfs_dirent *de) 1591553Srgrimes{ 1601553Srgrimes 1611553Srgrimes if (de->de_label != NULL) { 1621553Srgrimes mac_devfs_label_free(de->de_label); 1631553Srgrimes de->de_label = NULL; 1641553Srgrimes } 1651553Srgrimes} 166121299Sphk 1671553Srgrimesstatic void 168121299Sphkmac_mount_label_free(struct label *label) 16954375Sjoe{ 1701553Srgrimes 1711553Srgrimes MAC_POLICY_PERFORM_NOSLEEP(mount_destroy_label, label); 1721553Srgrimes mac_labelzone_free(label); 1731553Srgrimes} 1741553Srgrimes 1751553Srgrimesvoid 1762860Srgrimesmac_mount_destroy(struct mount *mp) 1771553Srgrimes{ 1781553Srgrimes 17930027Scharnier if (mp->mnt_label != NULL) { 1801553Srgrimes mac_mount_label_free(mp->mnt_label); 1811553Srgrimes mp->mnt_label = NULL; 1821553Srgrimes } 1831553Srgrimes} 18430027Scharnier 18530027Scharniervoid 1861553Srgrimesmac_vnode_label_free(struct label *label) 1876286Swollman{ 1886286Swollman 189122135Sphk MAC_POLICY_PERFORM_NOSLEEP(vnode_destroy_label, label); 19030027Scharnier mac_labelzone_free(label); 1916286Swollman} 19244303Swollman 19344303Swollmanvoid 194122135Sphkmac_vnode_destroy(struct vnode *vp) 19544303Swollman{ 19644303Swollman 197144295Stobez if (vp->v_label != NULL) { 198144295Stobez mac_vnode_label_free(vp->v_label); 199144295Stobez vp->v_label = NULL; 200144295Stobez } 201144295Stobez} 20244303Swollman 20344303Swollmanvoid 204122135Sphkmac_vnode_copy_label(struct label *src, struct label *dest) 20544303Swollman{ 20644303Swollman 20754375Sjoe MAC_POLICY_PERFORM_NOSLEEP(vnode_copy_label, src, dest); 20854375Sjoe} 20954375Sjoe 21061749Sjoeint 21154375Sjoemac_vnode_externalize_label(struct label *label, char *elements, 21254375Sjoe char *outbuf, size_t outbuflen) 2131553Srgrimes{ 2141553Srgrimes int error; 2151553Srgrimes 21630027Scharnier MAC_POLICY_EXTERNALIZE(vnode, label, elements, outbuf, outbuflen); 2171553Srgrimes 2181553Srgrimes return (error); 2191553Srgrimes} 22030027Scharnier 2211553Srgrimesint 2221553Srgrimesmac_vnode_internalize_label(struct label *label, char *string) 2231553Srgrimes{ 2241553Srgrimes int error; 2251553Srgrimes 2261553Srgrimes MAC_POLICY_INTERNALIZE(vnode, label, string); 2271553Srgrimes 22830027Scharnier return (error); 22930027Scharnier} 2301553Srgrimes 23141848Simpvoid 2321553Srgrimesmac_devfs_update(struct mount *mp, struct devfs_dirent *de, struct vnode *vp) 2331553Srgrimes{ 2341553Srgrimes 2351553Srgrimes MAC_POLICY_PERFORM_NOSLEEP(devfs_update, mp, de, de->de_label, vp, 23630027Scharnier vp->v_label); 23730027Scharnier} 2381553Srgrimes 239160083Smaximvoid 240160083Smaximmac_devfs_vnode_associate(struct mount *mp, struct devfs_dirent *de, 241160083Smaxim struct vnode *vp) 2421553Srgrimes{ 24311282Storstenb 2441553Srgrimes MAC_POLICY_PERFORM_NOSLEEP(devfs_vnode_associate, mp, mp->mnt_label, 24530027Scharnier de, de->de_label, vp, vp->v_label); 24630027Scharnier} 2471553Srgrimes 2481553Srgrimesint 249122896Sphkmac_vnode_associate_extattr(struct mount *mp, struct vnode *vp) 250121734Sphk{ 251121734Sphk int error; 252121734Sphk 253121734Sphk ASSERT_VOP_LOCKED(vp, "mac_vnode_associate_extattr"); 2541553Srgrimes 2551553Srgrimes MAC_POLICY_CHECK(vnode_associate_extattr, mp, mp->mnt_label, vp, 25618404Snate vp->v_label); 257187910Skientzle 258187940Skientzle return (error); 259187940Skientzle} 260187910Skientzle 261187910Skientzlevoid 262187910Skientzlemac_vnode_associate_singlelabel(struct mount *mp, struct vnode *vp) 263187910Skientzle{ 264187910Skientzle 2651553Srgrimes MAC_POLICY_PERFORM_NOSLEEP(vnode_associate_singlelabel, mp, 26630027Scharnier mp->mnt_label, vp, vp->v_label); 267187910Skientzle} 2681553Srgrimes 2691553Srgrimes/* 2701553Srgrimes * Functions implementing extended-attribute backed labels for file systems 2711553Srgrimes * that support it. 2721553Srgrimes * 2731553Srgrimes * Where possible, we use EA transactions to make writes to multiple 2741553Srgrimes * attributes across difference policies mutually atomic. We allow work to 2751553Srgrimes * continue on file systems not supporting EA transactions, but generate a 2761553Srgrimes * printf warning. 2771553Srgrimes */ 2781553Srgrimesint 2791553Srgrimesmac_vnode_create_extattr(struct ucred *cred, struct mount *mp, 2801553Srgrimes struct vnode *dvp, struct vnode *vp, struct componentname *cnp) 2811553Srgrimes{ 2821553Srgrimes int error; 2831553Srgrimes 2841553Srgrimes ASSERT_VOP_LOCKED(dvp, "mac_vnode_create_extattr"); 2851553Srgrimes ASSERT_VOP_LOCKED(vp, "mac_vnode_create_extattr"); 2861553Srgrimes 2871553Srgrimes error = VOP_OPENEXTATTR(vp, cred, curthread); 2881553Srgrimes if (error == EOPNOTSUPP) { 2891553Srgrimes if (ea_warn_once == 0) { 2901553Srgrimes printf("Warning: transactions not supported " 2911553Srgrimes "in EA write.\n"); 2921553Srgrimes ea_warn_once = 1; 2931553Srgrimes } 2941553Srgrimes } else if (error) 2951553Srgrimes return (error); 2961553Srgrimes 2971553Srgrimes MAC_POLICY_CHECK(vnode_create_extattr, cred, mp, mp->mnt_label, dvp, 29830027Scharnier dvp->v_label, vp, vp->v_label, cnp); 29930027Scharnier 3001553Srgrimes if (error) { 3011553Srgrimes VOP_CLOSEEXTATTR(vp, 0, NOCRED, curthread); 3021553Srgrimes return (error); 3031553Srgrimes } 3041553Srgrimes 30530027Scharnier error = VOP_CLOSEEXTATTR(vp, 1, NOCRED, curthread); 3061553Srgrimes if (error == EOPNOTSUPP) 3071553Srgrimes error = 0; 3081553Srgrimes 30930027Scharnier return (error); 3101553Srgrimes} 3111553Srgrimes 3121553Srgrimesstatic int 3131553Srgrimesmac_vnode_setlabel_extattr(struct ucred *cred, struct vnode *vp, 3141553Srgrimes struct label *intlabel) 3151553Srgrimes{ 3161553Srgrimes int error; 317121299Sphk 3181553Srgrimes ASSERT_VOP_LOCKED(vp, "mac_vnode_setlabel_extattr"); 319121299Sphk 3201553Srgrimes error = VOP_OPENEXTATTR(vp, cred, curthread); 3212860Srgrimes if (error == EOPNOTSUPP) { 3221553Srgrimes if (ea_warn_once == 0) { 3231553Srgrimes printf("Warning: transactions not supported " 324 "in EA write.\n"); 325 ea_warn_once = 1; 326 } 327 } else if (error) 328 return (error); 329 330 MAC_POLICY_CHECK(vnode_setlabel_extattr, cred, vp, vp->v_label, 331 intlabel); 332 333 if (error) { 334 VOP_CLOSEEXTATTR(vp, 0, NOCRED, curthread); 335 return (error); 336 } 337 338 error = VOP_CLOSEEXTATTR(vp, 1, NOCRED, curthread); 339 if (error == EOPNOTSUPP) 340 error = 0; 341 342 return (error); 343} 344 345void 346mac_vnode_execve_transition(struct ucred *old, struct ucred *new, 347 struct vnode *vp, struct label *interpvplabel, struct image_params *imgp) 348{ 349 350 ASSERT_VOP_LOCKED(vp, "mac_vnode_execve_transition"); 351 352 MAC_POLICY_PERFORM(vnode_execve_transition, old, new, vp, 353 vp->v_label, interpvplabel, imgp, imgp->execlabel); 354} 355 356int 357mac_vnode_execve_will_transition(struct ucred *old, struct vnode *vp, 358 struct label *interpvplabel, struct image_params *imgp) 359{ 360 int result; 361 362 ASSERT_VOP_LOCKED(vp, "mac_vnode_execve_will_transition"); 363 364 result = 0; 365 /* No sleeping since the process lock will be held by the caller. */ 366 MAC_POLICY_BOOLEAN_NOSLEEP(vnode_execve_will_transition, ||, old, vp, 367 vp->v_label, interpvplabel, imgp, imgp->execlabel); 368 369 return (result); 370} 371 372MAC_CHECK_PROBE_DEFINE3(vnode_check_access, "struct ucred *", 373 "struct vnode *", "accmode_t"); 374 375int 376mac_vnode_check_access(struct ucred *cred, struct vnode *vp, accmode_t accmode) 377{ 378 int error; 379 380 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_access"); 381 382 MAC_POLICY_CHECK(vnode_check_access, cred, vp, vp->v_label, accmode); 383 MAC_CHECK_PROBE3(vnode_check_access, error, cred, vp, accmode); 384 385 return (error); 386} 387 388MAC_CHECK_PROBE_DEFINE2(vnode_check_chdir, "struct ucred *", 389 "struct vnode *"); 390 391int 392mac_vnode_check_chdir(struct ucred *cred, struct vnode *dvp) 393{ 394 int error; 395 396 ASSERT_VOP_LOCKED(dvp, "mac_vnode_check_chdir"); 397 398 MAC_POLICY_CHECK(vnode_check_chdir, cred, dvp, dvp->v_label); 399 MAC_CHECK_PROBE2(vnode_check_chdir, error, cred, dvp); 400 401 return (error); 402} 403 404MAC_CHECK_PROBE_DEFINE2(vnode_check_chroot, "struct ucred *", 405 "struct vnode *"); 406 407int 408mac_vnode_check_chroot(struct ucred *cred, struct vnode *dvp) 409{ 410 int error; 411 412 ASSERT_VOP_LOCKED(dvp, "mac_vnode_check_chroot"); 413 414 MAC_POLICY_CHECK(vnode_check_chroot, cred, dvp, dvp->v_label); 415 MAC_CHECK_PROBE2(vnode_check_chroot, error, cred, dvp); 416 417 return (error); 418} 419 420MAC_CHECK_PROBE_DEFINE4(vnode_check_create, "struct ucred *", 421 "struct vnode *", "struct componentname *", "struct vattr *"); 422 423int 424mac_vnode_check_create(struct ucred *cred, struct vnode *dvp, 425 struct componentname *cnp, struct vattr *vap) 426{ 427 int error; 428 429 ASSERT_VOP_LOCKED(dvp, "mac_vnode_check_create"); 430 431 MAC_POLICY_CHECK(vnode_check_create, cred, dvp, dvp->v_label, cnp, 432 vap); 433 MAC_CHECK_PROBE4(vnode_check_create, error, cred, dvp, cnp, vap); 434 435 return (error); 436} 437 438MAC_CHECK_PROBE_DEFINE3(vnode_check_deleteacl, "struct ucred *", 439 "struct vnode *", "acl_type_t"); 440 441int 442mac_vnode_check_deleteacl(struct ucred *cred, struct vnode *vp, 443 acl_type_t type) 444{ 445 int error; 446 447 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_deleteacl"); 448 449 MAC_POLICY_CHECK(vnode_check_deleteacl, cred, vp, vp->v_label, type); 450 MAC_CHECK_PROBE3(vnode_check_deleteacl, error, cred, vp, type); 451 452 return (error); 453} 454 455MAC_CHECK_PROBE_DEFINE4(vnode_check_deleteextattr, "struct ucred *", 456 "struct vnode *", "int", "const char *"); 457 458int 459mac_vnode_check_deleteextattr(struct ucred *cred, struct vnode *vp, 460 int attrnamespace, const char *name) 461{ 462 int error; 463 464 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_deleteextattr"); 465 466 MAC_POLICY_CHECK(vnode_check_deleteextattr, cred, vp, vp->v_label, 467 attrnamespace, name); 468 MAC_CHECK_PROBE4(vnode_check_deleteextattr, error, cred, vp, 469 attrnamespace, name); 470 471 return (error); 472} 473 474MAC_CHECK_PROBE_DEFINE3(vnode_check_exec, "struct ucred *", "struct vnode *", 475 "struct image_params *"); 476 477int 478mac_vnode_check_exec(struct ucred *cred, struct vnode *vp, 479 struct image_params *imgp) 480{ 481 int error; 482 483 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_exec"); 484 485 MAC_POLICY_CHECK(vnode_check_exec, cred, vp, vp->v_label, imgp, 486 imgp->execlabel); 487 MAC_CHECK_PROBE3(vnode_check_exec, error, cred, vp, imgp); 488 489 return (error); 490} 491 492MAC_CHECK_PROBE_DEFINE3(vnode_check_getacl, "struct ucred *", 493 "struct vnode *", "acl_type_t"); 494 495int 496mac_vnode_check_getacl(struct ucred *cred, struct vnode *vp, acl_type_t type) 497{ 498 int error; 499 500 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_getacl"); 501 502 MAC_POLICY_CHECK(vnode_check_getacl, cred, vp, vp->v_label, type); 503 MAC_CHECK_PROBE3(vnode_check_getacl, error, cred, vp, type); 504 505 return (error); 506} 507 508MAC_CHECK_PROBE_DEFINE4(vnode_check_getextattr, "struct ucred *", 509 "struct vnode *", "int", "const char *"); 510 511int 512mac_vnode_check_getextattr(struct ucred *cred, struct vnode *vp, 513 int attrnamespace, const char *name) 514{ 515 int error; 516 517 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_getextattr"); 518 519 MAC_POLICY_CHECK(vnode_check_getextattr, cred, vp, vp->v_label, 520 attrnamespace, name); 521 MAC_CHECK_PROBE4(vnode_check_getextattr, error, cred, vp, 522 attrnamespace, name); 523 524 return (error); 525} 526 527MAC_CHECK_PROBE_DEFINE4(vnode_check_link, "struct ucred *", "struct vnode *", 528 "struct vnode *", "struct componentname *"); 529 530int 531mac_vnode_check_link(struct ucred *cred, struct vnode *dvp, 532 struct vnode *vp, struct componentname *cnp) 533{ 534 int error; 535 536 ASSERT_VOP_LOCKED(dvp, "mac_vnode_check_link"); 537 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_link"); 538 539 MAC_POLICY_CHECK(vnode_check_link, cred, dvp, dvp->v_label, vp, 540 vp->v_label, cnp); 541 MAC_CHECK_PROBE4(vnode_check_link, error, cred, dvp, vp, cnp); 542 543 return (error); 544} 545 546MAC_CHECK_PROBE_DEFINE3(vnode_check_listextattr, "struct ucred *", 547 "struct vnode *", "int"); 548 549int 550mac_vnode_check_listextattr(struct ucred *cred, struct vnode *vp, 551 int attrnamespace) 552{ 553 int error; 554 555 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_listextattr"); 556 557 MAC_POLICY_CHECK(vnode_check_listextattr, cred, vp, vp->v_label, 558 attrnamespace); 559 MAC_CHECK_PROBE3(vnode_check_listextattr, error, cred, vp, 560 attrnamespace); 561 562 return (error); 563} 564 565MAC_CHECK_PROBE_DEFINE3(vnode_check_lookup, "struct ucred *", 566 "struct vnode *", "struct componentname *"); 567 568int 569mac_vnode_check_lookup(struct ucred *cred, struct vnode *dvp, 570 struct componentname *cnp) 571{ 572 int error; 573 574 ASSERT_VOP_LOCKED(dvp, "mac_vnode_check_lookup"); 575 576 MAC_POLICY_CHECK(vnode_check_lookup, cred, dvp, dvp->v_label, cnp); 577 MAC_CHECK_PROBE3(vnode_check_lookup, error, cred, dvp, cnp); 578 579 return (error); 580} 581 582MAC_CHECK_PROBE_DEFINE4(vnode_check_mmap, "struct ucred *", "struct vnode *", 583 "int", "int"); 584 585int 586mac_vnode_check_mmap(struct ucred *cred, struct vnode *vp, int prot, 587 int flags) 588{ 589 int error; 590 591 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_mmap"); 592 593 MAC_POLICY_CHECK(vnode_check_mmap, cred, vp, vp->v_label, prot, flags); 594 MAC_CHECK_PROBE4(vnode_check_mmap, error, cred, vp, prot, flags); 595 596 return (error); 597} 598 599void 600mac_vnode_check_mmap_downgrade(struct ucred *cred, struct vnode *vp, 601 int *prot) 602{ 603 int result = *prot; 604 605 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_mmap_downgrade"); 606 607 MAC_POLICY_PERFORM(vnode_check_mmap_downgrade, cred, vp, vp->v_label, 608 &result); 609 610 *prot = result; 611} 612 613MAC_CHECK_PROBE_DEFINE3(vnode_check_mprotect, "struct ucred *", 614 "struct vnode *", "int"); 615 616int 617mac_vnode_check_mprotect(struct ucred *cred, struct vnode *vp, int prot) 618{ 619 int error; 620 621 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_mprotect"); 622 623 MAC_POLICY_CHECK(vnode_check_mprotect, cred, vp, vp->v_label, prot); 624 MAC_CHECK_PROBE3(vnode_check_mprotect, error, cred, vp, prot); 625 626 return (error); 627} 628 629MAC_CHECK_PROBE_DEFINE3(vnode_check_open, "struct ucred *", "struct vnode *", 630 "accmode_t"); 631 632int 633mac_vnode_check_open(struct ucred *cred, struct vnode *vp, accmode_t accmode) 634{ 635 int error; 636 637 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_open"); 638 639 MAC_POLICY_CHECK(vnode_check_open, cred, vp, vp->v_label, accmode); 640 return (error); 641} 642 643MAC_CHECK_PROBE_DEFINE3(vnode_check_poll, "struct ucred *", "struct ucred *", 644 "struct vnode *"); 645 646int 647mac_vnode_check_poll(struct ucred *active_cred, struct ucred *file_cred, 648 struct vnode *vp) 649{ 650 int error; 651 652 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_poll"); 653 654 MAC_POLICY_CHECK(vnode_check_poll, active_cred, file_cred, vp, 655 vp->v_label); 656 MAC_CHECK_PROBE3(vnode_check_poll, error, active_cred, file_cred, 657 vp); 658 659 return (error); 660} 661 662MAC_CHECK_PROBE_DEFINE3(vnode_check_read, "struct ucred *", "struct ucred *", 663 "struct vnode *"); 664 665int 666mac_vnode_check_read(struct ucred *active_cred, struct ucred *file_cred, 667 struct vnode *vp) 668{ 669 int error; 670 671 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_read"); 672 673 MAC_POLICY_CHECK(vnode_check_read, active_cred, file_cred, vp, 674 vp->v_label); 675 MAC_CHECK_PROBE3(vnode_check_read, error, active_cred, file_cred, 676 vp); 677 678 return (error); 679} 680 681MAC_CHECK_PROBE_DEFINE2(vnode_check_readdir, "struct ucred *", 682 "struct vnode *"); 683 684int 685mac_vnode_check_readdir(struct ucred *cred, struct vnode *dvp) 686{ 687 int error; 688 689 ASSERT_VOP_LOCKED(dvp, "mac_vnode_check_readdir"); 690 691 MAC_POLICY_CHECK(vnode_check_readdir, cred, dvp, dvp->v_label); 692 MAC_CHECK_PROBE2(vnode_check_readdir, error, cred, dvp); 693 694 return (error); 695} 696 697MAC_CHECK_PROBE_DEFINE2(vnode_check_readlink, "struct ucred *", 698 "struct vnode *"); 699 700int 701mac_vnode_check_readlink(struct ucred *cred, struct vnode *vp) 702{ 703 int error; 704 705 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_readlink"); 706 707 MAC_POLICY_CHECK(vnode_check_readlink, cred, vp, vp->v_label); 708 MAC_CHECK_PROBE2(vnode_check_readlink, error, cred, vp); 709 710 return (error); 711} 712 713MAC_CHECK_PROBE_DEFINE3(vnode_check_relabel, "struct ucred *", 714 "struct vnode *", "struct label *"); 715 716static int 717mac_vnode_check_relabel(struct ucred *cred, struct vnode *vp, 718 struct label *newlabel) 719{ 720 int error; 721 722 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_relabel"); 723 724 MAC_POLICY_CHECK(vnode_check_relabel, cred, vp, vp->v_label, newlabel); 725 MAC_CHECK_PROBE3(vnode_check_relabel, error, cred, vp, newlabel); 726 727 return (error); 728} 729 730MAC_CHECK_PROBE_DEFINE4(vnode_check_rename_from, "struct ucred *", 731 "struct vnode *", "struct vnode *", "struct componentname *"); 732 733int 734mac_vnode_check_rename_from(struct ucred *cred, struct vnode *dvp, 735 struct vnode *vp, struct componentname *cnp) 736{ 737 int error; 738 739 ASSERT_VOP_LOCKED(dvp, "mac_vnode_check_rename_from"); 740 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_rename_from"); 741 742 MAC_POLICY_CHECK(vnode_check_rename_from, cred, dvp, dvp->v_label, vp, 743 vp->v_label, cnp); 744 MAC_CHECK_PROBE4(vnode_check_rename_from, error, cred, dvp, vp, cnp); 745 746 return (error); 747} 748 749MAC_CHECK_PROBE_DEFINE4(vnode_check_rename_to, "struct ucred *", 750 "struct vnode *", "struct vnode *", "struct componentname *"); 751 752int 753mac_vnode_check_rename_to(struct ucred *cred, struct vnode *dvp, 754 struct vnode *vp, int samedir, struct componentname *cnp) 755{ 756 int error; 757 758 ASSERT_VOP_LOCKED(dvp, "mac_vnode_check_rename_to"); 759 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_rename_to"); 760 761 MAC_POLICY_CHECK(vnode_check_rename_to, cred, dvp, dvp->v_label, vp, 762 vp != NULL ? vp->v_label : NULL, samedir, cnp); 763 MAC_CHECK_PROBE4(vnode_check_rename_to, error, cred, dvp, vp, cnp); 764 return (error); 765} 766 767MAC_CHECK_PROBE_DEFINE2(vnode_check_revoke, "struct ucred *", 768 "struct vnode *"); 769 770int 771mac_vnode_check_revoke(struct ucred *cred, struct vnode *vp) 772{ 773 int error; 774 775 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_revoke"); 776 777 MAC_POLICY_CHECK(vnode_check_revoke, cred, vp, vp->v_label); 778 MAC_CHECK_PROBE2(vnode_check_revoke, error, cred, vp); 779 780 return (error); 781} 782 783MAC_CHECK_PROBE_DEFINE4(vnode_check_setacl, "struct ucred *", 784 "struct vnode *", "acl_tpe_t", "struct acl *"); 785 786int 787mac_vnode_check_setacl(struct ucred *cred, struct vnode *vp, acl_type_t type, 788 struct acl *acl) 789{ 790 int error; 791 792 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_setacl"); 793 794 MAC_POLICY_CHECK(vnode_check_setacl, cred, vp, vp->v_label, type, acl); 795 MAC_CHECK_PROBE4(vnode_check_setacl, error, cred, vp, type, acl); 796 797 return (error); 798} 799 800MAC_CHECK_PROBE_DEFINE4(vnode_check_setextattr, "struct ucred *", 801 "struct vnode *", "int", "const char *"); 802 803int 804mac_vnode_check_setextattr(struct ucred *cred, struct vnode *vp, 805 int attrnamespace, const char *name) 806{ 807 int error; 808 809 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_setextattr"); 810 811 MAC_POLICY_CHECK(vnode_check_setextattr, cred, vp, vp->v_label, 812 attrnamespace, name); 813 MAC_CHECK_PROBE4(vnode_check_setextattr, error, cred, vp, 814 attrnamespace, name); 815 816 return (error); 817} 818 819MAC_CHECK_PROBE_DEFINE3(vnode_check_setflags, "struct ucred *", 820 "struct vnode *", "u_long"); 821 822int 823mac_vnode_check_setflags(struct ucred *cred, struct vnode *vp, u_long flags) 824{ 825 int error; 826 827 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_setflags"); 828 829 MAC_POLICY_CHECK(vnode_check_setflags, cred, vp, vp->v_label, flags); 830 MAC_CHECK_PROBE3(vnode_check_setflags, error, cred, vp, flags); 831 832 return (error); 833} 834 835MAC_CHECK_PROBE_DEFINE3(vnode_check_setmode, "struct ucred *", 836 "struct vnode *", "mode_t"); 837 838int 839mac_vnode_check_setmode(struct ucred *cred, struct vnode *vp, mode_t mode) 840{ 841 int error; 842 843 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_setmode"); 844 845 MAC_POLICY_CHECK(vnode_check_setmode, cred, vp, vp->v_label, mode); 846 MAC_CHECK_PROBE3(vnode_check_setmode, error, cred, vp, mode); 847 848 return (error); 849} 850 851MAC_CHECK_PROBE_DEFINE4(vnode_check_setowner, "struct ucred *", 852 "struct vnode *", "uid_t", "gid_t"); 853 854int 855mac_vnode_check_setowner(struct ucred *cred, struct vnode *vp, uid_t uid, 856 gid_t gid) 857{ 858 int error; 859 860 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_setowner"); 861 862 MAC_POLICY_CHECK(vnode_check_setowner, cred, vp, vp->v_label, uid, gid); 863 MAC_CHECK_PROBE4(vnode_check_setowner, error, cred, vp, uid, gid); 864 865 return (error); 866} 867 868MAC_CHECK_PROBE_DEFINE4(vnode_check_setutimes, "struct ucred *", 869 "struct vnode *", "struct timespec *", "struct timespec *"); 870 871int 872mac_vnode_check_setutimes(struct ucred *cred, struct vnode *vp, 873 struct timespec atime, struct timespec mtime) 874{ 875 int error; 876 877 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_setutimes"); 878 879 MAC_POLICY_CHECK(vnode_check_setutimes, cred, vp, vp->v_label, atime, 880 mtime); 881 MAC_CHECK_PROBE4(vnode_check_setutimes, error, cred, vp, &atime, 882 &mtime); 883 884 return (error); 885} 886 887MAC_CHECK_PROBE_DEFINE3(vnode_check_stat, "struct ucred *", "struct ucred *", 888 "struct vnode *"); 889 890int 891mac_vnode_check_stat(struct ucred *active_cred, struct ucred *file_cred, 892 struct vnode *vp) 893{ 894 int error; 895 896 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_stat"); 897 898 MAC_POLICY_CHECK(vnode_check_stat, active_cred, file_cred, vp, 899 vp->v_label); 900 MAC_CHECK_PROBE3(vnode_check_stat, error, active_cred, file_cred, 901 vp); 902 903 return (error); 904} 905 906MAC_CHECK_PROBE_DEFINE4(vnode_check_unlink, "struct ucred *", 907 "struct vnode *", "struct vnode *", "struct componentname *"); 908 909int 910mac_vnode_check_unlink(struct ucred *cred, struct vnode *dvp, 911 struct vnode *vp, struct componentname *cnp) 912{ 913 int error; 914 915 ASSERT_VOP_LOCKED(dvp, "mac_vnode_check_unlink"); 916 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_unlink"); 917 918 MAC_POLICY_CHECK(vnode_check_unlink, cred, dvp, dvp->v_label, vp, 919 vp->v_label, cnp); 920 MAC_CHECK_PROBE4(vnode_check_unlink, error, cred, dvp, vp, cnp); 921 922 return (error); 923} 924 925MAC_CHECK_PROBE_DEFINE3(vnode_check_write, "struct ucred *", 926 "struct ucred *", "struct vnode *"); 927 928int 929mac_vnode_check_write(struct ucred *active_cred, struct ucred *file_cred, 930 struct vnode *vp) 931{ 932 int error; 933 934 ASSERT_VOP_LOCKED(vp, "mac_vnode_check_write"); 935 936 MAC_POLICY_CHECK(vnode_check_write, active_cred, file_cred, vp, 937 vp->v_label); 938 MAC_CHECK_PROBE3(vnode_check_write, error, active_cred, file_cred, 939 vp); 940 941 return (error); 942} 943 944void 945mac_vnode_relabel(struct ucred *cred, struct vnode *vp, 946 struct label *newlabel) 947{ 948 949 MAC_POLICY_PERFORM(vnode_relabel, cred, vp, vp->v_label, newlabel); 950} 951 952void 953mac_mount_create(struct ucred *cred, struct mount *mp) 954{ 955 956 MAC_POLICY_PERFORM(mount_create, cred, mp, mp->mnt_label); 957} 958 959MAC_CHECK_PROBE_DEFINE2(mount_check_stat, "struct ucred *", 960 "struct mount *"); 961 962int 963mac_mount_check_stat(struct ucred *cred, struct mount *mount) 964{ 965 int error; 966 967 MAC_POLICY_CHECK_NOSLEEP(mount_check_stat, cred, mount, mount->mnt_label); 968 MAC_CHECK_PROBE2(mount_check_stat, error, cred, mount); 969 970 return (error); 971} 972 973void 974mac_devfs_create_device(struct ucred *cred, struct mount *mp, 975 struct cdev *dev, struct devfs_dirent *de) 976{ 977 978 MAC_POLICY_PERFORM_NOSLEEP(devfs_create_device, cred, mp, dev, de, 979 de->de_label); 980} 981 982void 983mac_devfs_create_symlink(struct ucred *cred, struct mount *mp, 984 struct devfs_dirent *dd, struct devfs_dirent *de) 985{ 986 987 MAC_POLICY_PERFORM_NOSLEEP(devfs_create_symlink, cred, mp, dd, 988 dd->de_label, de, de->de_label); 989} 990 991void 992mac_devfs_create_directory(struct mount *mp, char *dirname, int dirnamelen, 993 struct devfs_dirent *de) 994{ 995 996 MAC_POLICY_PERFORM_NOSLEEP(devfs_create_directory, mp, dirname, 997 dirnamelen, de, de->de_label); 998} 999 1000/* 1001 * Implementation of VOP_SETLABEL() that relies on extended attributes to 1002 * store label data. Can be referenced by filesystems supporting extended 1003 * attributes. 1004 */ 1005int 1006vop_stdsetlabel_ea(struct vop_setlabel_args *ap) 1007{ 1008 struct vnode *vp = ap->a_vp; 1009 struct label *intlabel = ap->a_label; 1010 int error; 1011 1012 ASSERT_VOP_LOCKED(vp, "vop_stdsetlabel_ea"); 1013 1014 if ((vp->v_mount->mnt_flag & MNT_MULTILABEL) == 0) 1015 return (EOPNOTSUPP); 1016 1017 error = mac_vnode_setlabel_extattr(ap->a_cred, vp, intlabel); 1018 if (error) 1019 return (error); 1020 1021 mac_vnode_relabel(ap->a_cred, vp, intlabel); 1022 1023 return (0); 1024} 1025 1026int 1027vn_setlabel(struct vnode *vp, struct label *intlabel, struct ucred *cred) 1028{ 1029 int error; 1030 1031 if (vp->v_mount == NULL) { 1032 /* printf("vn_setlabel: null v_mount\n"); */ 1033 if (vp->v_type != VNON) 1034 printf("vn_setlabel: null v_mount with non-VNON\n"); 1035 return (EBADF); 1036 } 1037 1038 if ((vp->v_mount->mnt_flag & MNT_MULTILABEL) == 0) 1039 return (EOPNOTSUPP); 1040 1041 /* 1042 * Multi-phase commit. First check the policies to confirm the 1043 * change is OK. Then commit via the filesystem. Finally, update 1044 * the actual vnode label. 1045 * 1046 * Question: maybe the filesystem should update the vnode at the end 1047 * as part of VOP_SETLABEL()? 1048 */ 1049 error = mac_vnode_check_relabel(cred, vp, intlabel); 1050 if (error) 1051 return (error); 1052 1053 /* 1054 * VADMIN provides the opportunity for the filesystem to make 1055 * decisions about who is and is not able to modify labels and 1056 * protections on files. This might not be right. We can't assume 1057 * VOP_SETLABEL() will do it, because we might implement that as part 1058 * of vop_stdsetlabel_ea(). 1059 */ 1060 error = VOP_ACCESS(vp, VADMIN, cred, curthread); 1061 if (error) 1062 return (error); 1063 1064 error = VOP_SETLABEL(vp, intlabel, cred, curthread); 1065 if (error) 1066 return (error); 1067 1068 return (0); 1069} 1070