1 /*- 2 * Copyright (c) 1999-2005 Apple Inc. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of Apple Inc. ("Apple") nor the names of 14 * its contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR 21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 25 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 26 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 27 * POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include <sys/param.h> 34 #include <sys/filedesc.h> 35 #include <sys/ipc.h> 36 #include <sys/mount.h> 37 #include <sys/proc.h> 38 #include <sys/socket.h> 39 #include <sys/socketvar.h> 40 #include <sys/protosw.h> 41 #include <sys/domain.h> 42 #include <sys/sbuf.h> 43 #include <sys/systm.h> 44 #include <sys/un.h> 45 #include <sys/vnode.h> 46 47 #include <netinet/in.h> 48 #include <netinet/in_pcb.h> 49 50 #include <security/audit/audit.h> 51 #include <security/audit/audit_private.h> 52 53 /* 54 * Calls to manipulate elements of the audit record structure from system 55 * call code. Macro wrappers will prevent this functions from being entered 56 * if auditing is disabled, avoiding the function call cost. We check the 57 * thread audit record pointer anyway, as the audit condition could change, 58 * and pre-selection may not have allocated an audit record for this event. 59 * 60 * XXXAUDIT: Should we assert, in each case, that this field of the record 61 * hasn't already been filled in? 62 */ 63 void 64 audit_arg_addr(void *addr) 65 { 66 struct kaudit_record *ar; 67 68 ar = currecord(); 69 if (ar == NULL) 70 return; 71 72 ar->k_ar.ar_arg_addr = addr; 73 ARG_SET_VALID(ar, ARG_ADDR); 74 } 75 76 void 77 audit_arg_exit(int status, int retval) 78 { 79 struct kaudit_record *ar; 80 81 ar = currecord(); 82 if (ar == NULL) 83 return; 84 85 ar->k_ar.ar_arg_exitstatus = status; 86 ar->k_ar.ar_arg_exitretval = retval; 87 ARG_SET_VALID(ar, ARG_EXIT); 88 } 89 90 void 91 audit_arg_len(int len) 92 { 93 struct kaudit_record *ar; 94 95 ar = currecord(); 96 if (ar == NULL) 97 return; 98 99 ar->k_ar.ar_arg_len = len; 100 ARG_SET_VALID(ar, ARG_LEN); 101 } 102 103 void 104 audit_arg_atfd1(int atfd) 105 { 106 struct kaudit_record *ar; 107 108 ar = currecord(); 109 if (ar == NULL) 110 return; 111 112 ar->k_ar.ar_arg_atfd1 = atfd; 113 ARG_SET_VALID(ar, ARG_ATFD1); 114 } 115 116 void 117 audit_arg_atfd2(int atfd) 118 { 119 struct kaudit_record *ar; 120 121 ar = currecord(); 122 if (ar == NULL) 123 return; 124 125 ar->k_ar.ar_arg_atfd2 = atfd; 126 ARG_SET_VALID(ar, ARG_ATFD2); 127 } 128 129 void 130 audit_arg_fd(int fd) 131 { 132 struct kaudit_record *ar; 133 134 ar = currecord(); 135 if (ar == NULL) 136 return; 137 138 ar->k_ar.ar_arg_fd = fd; 139 ARG_SET_VALID(ar, ARG_FD); 140 } 141 142 void 143 audit_arg_fflags(int fflags) 144 { 145 struct kaudit_record *ar; 146 147 ar = currecord(); 148 if (ar == NULL) 149 return; 150 151 ar->k_ar.ar_arg_fflags = fflags; 152 ARG_SET_VALID(ar, ARG_FFLAGS); 153 } 154 155 void 156 audit_arg_gid(gid_t gid) 157 { 158 struct kaudit_record *ar; 159 160 ar = currecord(); 161 if (ar == NULL) 162 return; 163 164 ar->k_ar.ar_arg_gid = gid; 165 ARG_SET_VALID(ar, ARG_GID); 166 } 167 168 void 169 audit_arg_uid(uid_t uid) 170 { 171 struct kaudit_record *ar; 172 173 ar = currecord(); 174 if (ar == NULL) 175 return; 176 177 ar->k_ar.ar_arg_uid = uid; 178 ARG_SET_VALID(ar, ARG_UID); 179 } 180 181 void 182 audit_arg_egid(gid_t egid) 183 { 184 struct kaudit_record *ar; 185 186 ar = currecord(); 187 if (ar == NULL) 188 return; 189 190 ar->k_ar.ar_arg_egid = egid; 191 ARG_SET_VALID(ar, ARG_EGID); 192 } 193 194 void 195 audit_arg_euid(uid_t euid) 196 { 197 struct kaudit_record *ar; 198 199 ar = currecord(); 200 if (ar == NULL) 201 return; 202 203 ar->k_ar.ar_arg_euid = euid; 204 ARG_SET_VALID(ar, ARG_EUID); 205 } 206 207 void 208 audit_arg_rgid(gid_t rgid) 209 { 210 struct kaudit_record *ar; 211 212 ar = currecord(); 213 if (ar == NULL) 214 return; 215 216 ar->k_ar.ar_arg_rgid = rgid; 217 ARG_SET_VALID(ar, ARG_RGID); 218 } 219 220 void 221 audit_arg_ruid(uid_t ruid) 222 { 223 struct kaudit_record *ar; 224 225 ar = currecord(); 226 if (ar == NULL) 227 return; 228 229 ar->k_ar.ar_arg_ruid = ruid; 230 ARG_SET_VALID(ar, ARG_RUID); 231 } 232 233 void 234 audit_arg_sgid(gid_t sgid) 235 { 236 struct kaudit_record *ar; 237 238 ar = currecord(); 239 if (ar == NULL) 240 return; 241 242 ar->k_ar.ar_arg_sgid = sgid; 243 ARG_SET_VALID(ar, ARG_SGID); 244 } 245 246 void 247 audit_arg_suid(uid_t suid) 248 { 249 struct kaudit_record *ar; 250 251 ar = currecord(); 252 if (ar == NULL) 253 return; 254 255 ar->k_ar.ar_arg_suid = suid; 256 ARG_SET_VALID(ar, ARG_SUID); 257 } 258 259 void 260 audit_arg_groupset(gid_t *gidset, u_int gidset_size) 261 { 262 u_int i; 263 struct kaudit_record *ar; 264 265 KASSERT(gidset_size <= ngroups_max + 1, 266 ("audit_arg_groupset: gidset_size > (kern.ngroups + 1)")); 267 268 ar = currecord(); 269 if (ar == NULL) 270 return; 271 272 if (ar->k_ar.ar_arg_groups.gidset == NULL) 273 ar->k_ar.ar_arg_groups.gidset = malloc( 274 sizeof(gid_t) * gidset_size, M_AUDITGIDSET, M_WAITOK); 275 276 for (i = 0; i < gidset_size; i++) 277 ar->k_ar.ar_arg_groups.gidset[i] = gidset[i]; 278 ar->k_ar.ar_arg_groups.gidset_size = gidset_size; 279 ARG_SET_VALID(ar, ARG_GROUPSET); 280 } 281 282 void 283 audit_arg_login(char *login) 284 { 285 struct kaudit_record *ar; 286 287 ar = currecord(); 288 if (ar == NULL) 289 return; 290 291 strlcpy(ar->k_ar.ar_arg_login, login, MAXLOGNAME); 292 ARG_SET_VALID(ar, ARG_LOGIN); 293 } 294 295 void 296 audit_arg_ctlname(int *name, int namelen) 297 { 298 struct kaudit_record *ar; 299 300 ar = currecord(); 301 if (ar == NULL) 302 return; 303 304 bcopy(name, &ar->k_ar.ar_arg_ctlname, namelen * sizeof(int)); 305 ar->k_ar.ar_arg_len = namelen; 306 ARG_SET_VALID(ar, ARG_CTLNAME | ARG_LEN); 307 } 308 309 void 310 audit_arg_mask(int mask) 311 { 312 struct kaudit_record *ar; 313 314 ar = currecord(); 315 if (ar == NULL) 316 return; 317 318 ar->k_ar.ar_arg_mask = mask; 319 ARG_SET_VALID(ar, ARG_MASK); 320 } 321 322 void 323 audit_arg_mode(mode_t mode) 324 { 325 struct kaudit_record *ar; 326 327 ar = currecord(); 328 if (ar == NULL) 329 return; 330 331 ar->k_ar.ar_arg_mode = mode; 332 ARG_SET_VALID(ar, ARG_MODE); 333 } 334 335 void 336 audit_arg_dev(int dev) 337 { 338 struct kaudit_record *ar; 339 340 ar = currecord(); 341 if (ar == NULL) 342 return; 343 344 ar->k_ar.ar_arg_dev = dev; 345 ARG_SET_VALID(ar, ARG_DEV); 346 } 347 348 void 349 audit_arg_value(long value) 350 { 351 struct kaudit_record *ar; 352 353 ar = currecord(); 354 if (ar == NULL) 355 return; 356 357 ar->k_ar.ar_arg_value = value; 358 ARG_SET_VALID(ar, ARG_VALUE); 359 } 360 361 void 362 audit_arg_owner(uid_t uid, gid_t gid) 363 { 364 struct kaudit_record *ar; 365 366 ar = currecord(); 367 if (ar == NULL) 368 return; 369 370 ar->k_ar.ar_arg_uid = uid; 371 ar->k_ar.ar_arg_gid = gid; 372 ARG_SET_VALID(ar, ARG_UID | ARG_GID); 373 } 374 375 void 376 audit_arg_pid(pid_t pid) 377 { 378 struct kaudit_record *ar; 379 380 ar = currecord(); 381 if (ar == NULL) 382 return; 383 384 ar->k_ar.ar_arg_pid = pid; 385 ARG_SET_VALID(ar, ARG_PID); 386 } 387 388 void 389 audit_arg_process(struct proc *p) 390 { 391 struct kaudit_record *ar; 392 struct ucred *cred; 393 394 KASSERT(p != NULL, ("audit_arg_process: p == NULL")); 395 396 PROC_LOCK_ASSERT(p, MA_OWNED); 397 398 ar = currecord(); 399 if (ar == NULL) 400 return; 401 402 cred = p->p_ucred; 403 ar->k_ar.ar_arg_auid = cred->cr_audit.ai_auid; 404 ar->k_ar.ar_arg_euid = cred->cr_uid; 405 ar->k_ar.ar_arg_egid = cred->cr_groups[0]; 406 ar->k_ar.ar_arg_ruid = cred->cr_ruid; 407 ar->k_ar.ar_arg_rgid = cred->cr_rgid; 408 ar->k_ar.ar_arg_asid = cred->cr_audit.ai_asid; 409 ar->k_ar.ar_arg_termid_addr = cred->cr_audit.ai_termid; 410 ar->k_ar.ar_arg_pid = p->p_pid; 411 ARG_SET_VALID(ar, ARG_AUID | ARG_EUID | ARG_EGID | ARG_RUID | 412 ARG_RGID | ARG_ASID | ARG_TERMID_ADDR | ARG_PID | ARG_PROCESS); 413 } 414 415 void 416 audit_arg_signum(u_int signum) 417 { 418 struct kaudit_record *ar; 419 420 ar = currecord(); 421 if (ar == NULL) 422 return; 423 424 ar->k_ar.ar_arg_signum = signum; 425 ARG_SET_VALID(ar, ARG_SIGNUM); 426 } 427 428 void 429 audit_arg_socket(int sodomain, int sotype, int soprotocol) 430 { 431 struct kaudit_record *ar; 432 433 ar = currecord(); 434 if (ar == NULL) 435 return; 436 437 ar->k_ar.ar_arg_sockinfo.so_domain = sodomain; 438 ar->k_ar.ar_arg_sockinfo.so_type = sotype; 439 ar->k_ar.ar_arg_sockinfo.so_protocol = soprotocol; 440 ARG_SET_VALID(ar, ARG_SOCKINFO); 441 } 442 443 void 444 audit_arg_sockaddr(struct thread *td, struct sockaddr *sa) 445 { 446 struct kaudit_record *ar; 447 448 KASSERT(td != NULL, ("audit_arg_sockaddr: td == NULL")); 449 KASSERT(sa != NULL, ("audit_arg_sockaddr: sa == NULL")); 450 451 ar = currecord(); 452 if (ar == NULL) 453 return; 454 455 bcopy(sa, &ar->k_ar.ar_arg_sockaddr, sa->sa_len); 456 switch (sa->sa_family) { 457 case AF_INET: 458 ARG_SET_VALID(ar, ARG_SADDRINET); 459 break; 460 461 case AF_INET6: 462 ARG_SET_VALID(ar, ARG_SADDRINET6); 463 break; 464 465 case AF_UNIX: 466 audit_arg_upath1(td, ((struct sockaddr_un *)sa)->sun_path); 467 ARG_SET_VALID(ar, ARG_SADDRUNIX); 468 break; 469 /* XXXAUDIT: default:? */ 470 } 471 } 472 473 void 474 audit_arg_auid(uid_t auid) 475 { 476 struct kaudit_record *ar; 477 478 ar = currecord(); 479 if (ar == NULL) 480 return; 481 482 ar->k_ar.ar_arg_auid = auid; 483 ARG_SET_VALID(ar, ARG_AUID); 484 } 485 486 void 487 audit_arg_auditinfo(struct auditinfo *au_info) 488 { 489 struct kaudit_record *ar; 490 491 ar = currecord(); 492 if (ar == NULL) 493 return; 494 495 ar->k_ar.ar_arg_auid = au_info->ai_auid; 496 ar->k_ar.ar_arg_asid = au_info->ai_asid; 497 ar->k_ar.ar_arg_amask.am_success = au_info->ai_mask.am_success; 498 ar->k_ar.ar_arg_amask.am_failure = au_info->ai_mask.am_failure; 499 ar->k_ar.ar_arg_termid.port = au_info->ai_termid.port; 500 ar->k_ar.ar_arg_termid.machine = au_info->ai_termid.machine; 501 ARG_SET_VALID(ar, ARG_AUID | ARG_ASID | ARG_AMASK | ARG_TERMID); 502 } 503 504 void 505 audit_arg_auditinfo_addr(struct auditinfo_addr *au_info) 506 { 507 struct kaudit_record *ar; 508 509 ar = currecord(); 510 if (ar == NULL) 511 return; 512 513 ar->k_ar.ar_arg_auid = au_info->ai_auid; 514 ar->k_ar.ar_arg_asid = au_info->ai_asid; 515 ar->k_ar.ar_arg_amask.am_success = au_info->ai_mask.am_success; 516 ar->k_ar.ar_arg_amask.am_failure = au_info->ai_mask.am_failure; 517 ar->k_ar.ar_arg_termid_addr.at_type = au_info->ai_termid.at_type; 518 ar->k_ar.ar_arg_termid_addr.at_port = au_info->ai_termid.at_port; 519 ar->k_ar.ar_arg_termid_addr.at_addr[0] = au_info->ai_termid.at_addr[0]; 520 ar->k_ar.ar_arg_termid_addr.at_addr[1] = au_info->ai_termid.at_addr[1]; 521 ar->k_ar.ar_arg_termid_addr.at_addr[2] = au_info->ai_termid.at_addr[2]; 522 ar->k_ar.ar_arg_termid_addr.at_addr[3] = au_info->ai_termid.at_addr[3]; 523 ARG_SET_VALID(ar, ARG_AUID | ARG_ASID | ARG_AMASK | ARG_TERMID_ADDR); 524 } 525 526 void 527 audit_arg_text(char *text) 528 { 529 struct kaudit_record *ar; 530 531 KASSERT(text != NULL, ("audit_arg_text: text == NULL")); 532 533 ar = currecord(); 534 if (ar == NULL) 535 return; 536 537 /* Invalidate the text string */ 538 ar->k_ar.ar_valid_arg &= (ARG_ALL ^ ARG_TEXT); 539 540 if (ar->k_ar.ar_arg_text == NULL) 541 ar->k_ar.ar_arg_text = malloc(MAXPATHLEN, M_AUDITTEXT, 542 M_WAITOK); 543 544 strncpy(ar->k_ar.ar_arg_text, text, MAXPATHLEN); 545 ARG_SET_VALID(ar, ARG_TEXT); 546 } 547 548 void 549 audit_arg_cmd(int cmd) 550 { 551 struct kaudit_record *ar; 552 553 ar = currecord(); 554 if (ar == NULL) 555 return; 556 557 ar->k_ar.ar_arg_cmd = cmd; 558 ARG_SET_VALID(ar, ARG_CMD); 559 } 560 561 void 562 audit_arg_svipc_cmd(int cmd) 563 { 564 struct kaudit_record *ar; 565 566 ar = currecord(); 567 if (ar == NULL) 568 return; 569 570 ar->k_ar.ar_arg_svipc_cmd = cmd; 571 ARG_SET_VALID(ar, ARG_SVIPC_CMD); 572 } 573 574 void 575 audit_arg_svipc_perm(struct ipc_perm *perm) 576 { 577 struct kaudit_record *ar; 578 579 ar = currecord(); 580 if (ar == NULL) 581 return; 582 583 bcopy(perm, &ar->k_ar.ar_arg_svipc_perm, 584 sizeof(ar->k_ar.ar_arg_svipc_perm)); 585 ARG_SET_VALID(ar, ARG_SVIPC_PERM); 586 } 587 588 void 589 audit_arg_svipc_id(int id) 590 { 591 struct kaudit_record *ar; 592 593 ar = currecord(); 594 if (ar == NULL) 595 return; 596 597 ar->k_ar.ar_arg_svipc_id = id; 598 ARG_SET_VALID(ar, ARG_SVIPC_ID); 599 } 600 601 void 602 audit_arg_svipc_addr(void * addr) 603 { 604 struct kaudit_record *ar; 605 606 ar = currecord(); 607 if (ar == NULL) 608 return; 609 610 ar->k_ar.ar_arg_svipc_addr = addr; 611 ARG_SET_VALID(ar, ARG_SVIPC_ADDR); 612 } 613 614 void 615 audit_arg_posix_ipc_perm(uid_t uid, gid_t gid, mode_t mode) 616 { 617 struct kaudit_record *ar; 618 619 ar = currecord(); 620 if (ar == NULL) 621 return; 622 623 ar->k_ar.ar_arg_pipc_perm.pipc_uid = uid; 624 ar->k_ar.ar_arg_pipc_perm.pipc_gid = gid; 625 ar->k_ar.ar_arg_pipc_perm.pipc_mode = mode; 626 ARG_SET_VALID(ar, ARG_POSIX_IPC_PERM); 627 } 628 629 void 630 audit_arg_auditon(union auditon_udata *udata) 631 { 632 struct kaudit_record *ar; 633 634 ar = currecord(); 635 if (ar == NULL) 636 return; 637 638 bcopy((void *)udata, &ar->k_ar.ar_arg_auditon, 639 sizeof(ar->k_ar.ar_arg_auditon)); 640 ARG_SET_VALID(ar, ARG_AUDITON); 641 } 642 643 /* 644 * Audit information about a file, either the file's vnode info, or its 645 * socket address info. 646 */ 647 void 648 audit_arg_file(struct proc *p, struct file *fp) 649 { 650 struct kaudit_record *ar; 651 struct socket *so; 652 struct inpcb *pcb; 653 struct vnode *vp; 654 int vfslocked; 655 656 ar = currecord(); 657 if (ar == NULL) 658 return; 659 660 switch (fp->f_type) { 661 case DTYPE_VNODE: 662 case DTYPE_FIFO: 663 /* 664 * XXXAUDIT: Only possibly to record as first vnode? 665 */ 666 vp = fp->f_vnode; 667 vfslocked = VFS_LOCK_GIANT(vp->v_mount); 668 vn_lock(vp, LK_SHARED | LK_RETRY); 669 audit_arg_vnode1(vp); 670 VOP_UNLOCK(vp, 0); 671 VFS_UNLOCK_GIANT(vfslocked); 672 break; 673 674 case DTYPE_SOCKET: 675 so = (struct socket *)fp->f_data; 676 if (INP_CHECK_SOCKAF(so, PF_INET)) { 677 SOCK_LOCK(so); 678 ar->k_ar.ar_arg_sockinfo.so_type = 679 so->so_type; 680 ar->k_ar.ar_arg_sockinfo.so_domain = 681 INP_SOCKAF(so); 682 ar->k_ar.ar_arg_sockinfo.so_protocol = 683 so->so_proto->pr_protocol; 684 SOCK_UNLOCK(so); 685 pcb = (struct inpcb *)so->so_pcb; 686 INP_RLOCK(pcb); 687 ar->k_ar.ar_arg_sockinfo.so_raddr = 688 pcb->inp_faddr.s_addr; 689 ar->k_ar.ar_arg_sockinfo.so_laddr = 690 pcb->inp_laddr.s_addr; 691 ar->k_ar.ar_arg_sockinfo.so_rport = 692 pcb->inp_fport; 693 ar->k_ar.ar_arg_sockinfo.so_lport = 694 pcb->inp_lport; 695 INP_RUNLOCK(pcb); 696 ARG_SET_VALID(ar, ARG_SOCKINFO); 697 } 698 break; 699 700 default: 701 /* XXXAUDIT: else? */ 702 break; 703 } 704 } 705 706 /* 707 * Store a path as given by the user process for auditing into the audit 708 * record stored on the user thread. This function will allocate the memory 709 * to store the path info if not already available. This memory will be 710 * freed when the audit record is freed. 711 */ 712 static void 713 audit_arg_upath(struct thread *td, char *upath, char **pathp) 714 { 715 716 if (*pathp == NULL) 717 *pathp = malloc(MAXPATHLEN, M_AUDITPATH, M_WAITOK); 718 audit_canon_path(td, upath, *pathp); 719 } 720 721 void 722 audit_arg_upath1(struct thread *td, char *upath) 723 { 724 struct kaudit_record *ar; 725 726 ar = currecord(); 727 if (ar == NULL) 728 return; 729 730 audit_arg_upath(td, upath, &ar->k_ar.ar_arg_upath1); 731 ARG_SET_VALID(ar, ARG_UPATH1); 732 } 733 734 void 735 audit_arg_upath2(struct thread *td, char *upath) 736 { 737 struct kaudit_record *ar; 738 739 ar = currecord(); 740 if (ar == NULL) 741 return; 742 743 audit_arg_upath(td, upath, &ar->k_ar.ar_arg_upath2); 744 ARG_SET_VALID(ar, ARG_UPATH2); 745 } 746 747 /* 748 * Function to save the path and vnode attr information into the audit 749 * record. 750 * 751 * It is assumed that the caller will hold any vnode locks necessary to 752 * perform a VOP_GETATTR() on the passed vnode. 753 * 754 * XXX: The attr code is very similar to vfs_vnops.c:vn_stat(), but always 755 * provides access to the generation number as we need that to construct the 756 * BSM file ID. 757 * 758 * XXX: We should accept the process argument from the caller, since it's 759 * very likely they already have a reference. 760 * 761 * XXX: Error handling in this function is poor. 762 * 763 * XXXAUDIT: Possibly KASSERT the path pointer is NULL? 764 */ 765 static int 766 audit_arg_vnode(struct vnode *vp, struct vnode_au_info *vnp) 767 { 768 struct vattr vattr; 769 int error; 770 771 /* 772 * Assume that if the caller is calling audit_arg_vnode() on a 773 * non-MPSAFE vnode, then it will have acquired Giant. 774 */ 775 VFS_ASSERT_GIANT(vp->v_mount); 776 ASSERT_VOP_LOCKED(vp, "audit_arg_vnode"); 777 778 error = VOP_GETATTR(vp, &vattr, curthread->td_ucred); 779 if (error) { 780 /* XXX: How to handle this case? */ 781 return (error); 782 } 783 784 vnp->vn_mode = vattr.va_mode; 785 vnp->vn_uid = vattr.va_uid; 786 vnp->vn_gid = vattr.va_gid; 787 vnp->vn_dev = vattr.va_rdev; 788 vnp->vn_fsid = vattr.va_fsid; 789 vnp->vn_fileid = vattr.va_fileid; 790 vnp->vn_gen = vattr.va_gen; 791 return (0); 792 } 793 794 void 795 audit_arg_vnode1(struct vnode *vp) 796 { 797 struct kaudit_record *ar; 798 int error; 799 800 ar = currecord(); 801 if (ar == NULL) 802 return; 803 804 ARG_CLEAR_VALID(ar, ARG_VNODE1); 805 error = audit_arg_vnode(vp, &ar->k_ar.ar_arg_vnode1); 806 if (error == 0) 807 ARG_SET_VALID(ar, ARG_VNODE1); 808 } 809 810 void 811 audit_arg_vnode2(struct vnode *vp) 812 { 813 struct kaudit_record *ar; 814 int error; 815 816 ar = currecord(); 817 if (ar == NULL) 818 return; 819 820 ARG_CLEAR_VALID(ar, ARG_VNODE2); 821 error = audit_arg_vnode(vp, &ar->k_ar.ar_arg_vnode2); 822 if (error == 0) 823 ARG_SET_VALID(ar, ARG_VNODE2); 824 } 825 826 /* 827 * Audit the argument strings passed to exec. 828 */ 829 void 830 audit_arg_argv(char *argv, int argc, int length) 831 { 832 struct kaudit_record *ar; 833 834 if (audit_argv == 0) 835 return; 836 837 ar = currecord(); 838 if (ar == NULL) 839 return; 840 841 ar->k_ar.ar_arg_argv = malloc(length, M_AUDITTEXT, M_WAITOK); 842 bcopy(argv, ar->k_ar.ar_arg_argv, length); 843 ar->k_ar.ar_arg_argc = argc; 844 ARG_SET_VALID(ar, ARG_ARGV); 845 } 846 847 /* 848 * Audit the environment strings passed to exec. 849 */ 850 void 851 audit_arg_envv(char *envv, int envc, int length) 852 { 853 struct kaudit_record *ar; 854 855 if (audit_arge == 0) 856 return; 857 858 ar = currecord(); 859 if (ar == NULL) 860 return; 861 862 ar->k_ar.ar_arg_envv = malloc(length, M_AUDITTEXT, M_WAITOK); 863 bcopy(envv, ar->k_ar.ar_arg_envv, length); 864 ar->k_ar.ar_arg_envc = envc; 865 ARG_SET_VALID(ar, ARG_ENVV); 866 } 867 868 /* 869 * The close() system call uses it's own audit call to capture the path/vnode 870 * information because those pieces are not easily obtained within the system 871 * call itself. 872 */ 873 void 874 audit_sysclose(struct thread *td, int fd) 875 { 876 struct kaudit_record *ar; 877 struct vnode *vp; 878 struct file *fp; 879 int vfslocked; 880 881 KASSERT(td != NULL, ("audit_sysclose: td == NULL")); 882 883 ar = currecord(); 884 if (ar == NULL) 885 return; 886 887 audit_arg_fd(fd); 888 889 if (getvnode(td->td_proc->p_fd, fd, &fp) != 0) 890 return; 891 892 vp = fp->f_vnode; 893 vfslocked = VFS_LOCK_GIANT(vp->v_mount); 894 vn_lock(vp, LK_SHARED | LK_RETRY); 895 audit_arg_vnode1(vp); 896 VOP_UNLOCK(vp, 0); 897 VFS_UNLOCK_GIANT(vfslocked); 898 fdrop(fp, td); 899 } 900