1 /* 2 * Copyright (c) 1999-2005 Apple Computer, 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 Computer, 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 * $FreeBSD$ 30 */ 31 32 #include <sys/param.h> 33 #include <sys/filedesc.h> 34 #include <sys/ipc.h> 35 #include <sys/mount.h> 36 #include <sys/proc.h> 37 #include <sys/socket.h> 38 #include <sys/socketvar.h> 39 #include <sys/protosw.h> 40 #include <sys/domain.h> 41 #include <sys/sbuf.h> 42 #include <sys/systm.h> 43 #include <sys/un.h> 44 #include <sys/vnode.h> 45 46 #include <netinet/in.h> 47 #include <netinet/in_pcb.h> 48 49 #include <security/audit/audit.h> 50 #include <security/audit/audit_private.h> 51 52 /* 53 * Calls to manipulate elements of the audit record structure from system 54 * call code. Macro wrappers will prevent this functions from being 55 * entered if auditing is disabled, avoiding the function call cost. We 56 * check the thread audit record pointer anyway, as the audit condition 57 * could change, and pre-selection may not have allocated an audit 58 * 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_fd(int fd) 105 { 106 struct kaudit_record *ar; 107 108 ar = currecord(); 109 if (ar == NULL) 110 return; 111 112 ar->k_ar.ar_arg_fd = fd; 113 ARG_SET_VALID(ar, ARG_FD); 114 } 115 116 void 117 audit_arg_fflags(int fflags) 118 { 119 struct kaudit_record *ar; 120 121 ar = currecord(); 122 if (ar == NULL) 123 return; 124 125 ar->k_ar.ar_arg_fflags = fflags; 126 ARG_SET_VALID(ar, ARG_FFLAGS); 127 } 128 129 void 130 audit_arg_gid(gid_t gid) 131 { 132 struct kaudit_record *ar; 133 134 ar = currecord(); 135 if (ar == NULL) 136 return; 137 138 ar->k_ar.ar_arg_gid = gid; 139 ARG_SET_VALID(ar, ARG_GID); 140 } 141 142 void 143 audit_arg_uid(uid_t uid) 144 { 145 struct kaudit_record *ar; 146 147 ar = currecord(); 148 if (ar == NULL) 149 return; 150 151 ar->k_ar.ar_arg_uid = uid; 152 ARG_SET_VALID(ar, ARG_UID); 153 } 154 155 void 156 audit_arg_egid(gid_t egid) 157 { 158 struct kaudit_record *ar; 159 160 ar = currecord(); 161 if (ar == NULL) 162 return; 163 164 ar->k_ar.ar_arg_egid = egid; 165 ARG_SET_VALID(ar, ARG_EGID); 166 } 167 168 void 169 audit_arg_euid(uid_t euid) 170 { 171 struct kaudit_record *ar; 172 173 ar = currecord(); 174 if (ar == NULL) 175 return; 176 177 ar->k_ar.ar_arg_euid = euid; 178 ARG_SET_VALID(ar, ARG_EUID); 179 } 180 181 void 182 audit_arg_rgid(gid_t rgid) 183 { 184 struct kaudit_record *ar; 185 186 ar = currecord(); 187 if (ar == NULL) 188 return; 189 190 ar->k_ar.ar_arg_rgid = rgid; 191 ARG_SET_VALID(ar, ARG_RGID); 192 } 193 194 void 195 audit_arg_ruid(uid_t ruid) 196 { 197 struct kaudit_record *ar; 198 199 ar = currecord(); 200 if (ar == NULL) 201 return; 202 203 ar->k_ar.ar_arg_ruid = ruid; 204 ARG_SET_VALID(ar, ARG_RUID); 205 } 206 207 void 208 audit_arg_sgid(gid_t sgid) 209 { 210 struct kaudit_record *ar; 211 212 ar = currecord(); 213 if (ar == NULL) 214 return; 215 216 ar->k_ar.ar_arg_sgid = sgid; 217 ARG_SET_VALID(ar, ARG_SGID); 218 } 219 220 void 221 audit_arg_suid(uid_t suid) 222 { 223 struct kaudit_record *ar; 224 225 ar = currecord(); 226 if (ar == NULL) 227 return; 228 229 ar->k_ar.ar_arg_suid = suid; 230 ARG_SET_VALID(ar, ARG_SUID); 231 } 232 233 void 234 audit_arg_groupset(gid_t *gidset, u_int gidset_size) 235 { 236 int i; 237 struct kaudit_record *ar; 238 239 ar = currecord(); 240 if (ar == NULL) 241 return; 242 243 for (i = 0; i < gidset_size; i++) 244 ar->k_ar.ar_arg_groups.gidset[i] = gidset[i]; 245 ar->k_ar.ar_arg_groups.gidset_size = gidset_size; 246 ARG_SET_VALID(ar, ARG_GROUPSET); 247 } 248 249 void 250 audit_arg_login(char *login) 251 { 252 struct kaudit_record *ar; 253 254 ar = currecord(); 255 if (ar == NULL) 256 return; 257 258 strlcpy(ar->k_ar.ar_arg_login, login, MAXLOGNAME); 259 ARG_SET_VALID(ar, ARG_LOGIN); 260 } 261 262 void 263 audit_arg_ctlname(int *name, int namelen) 264 { 265 struct kaudit_record *ar; 266 267 ar = currecord(); 268 if (ar == NULL) 269 return; 270 271 bcopy(name, &ar->k_ar.ar_arg_ctlname, namelen * sizeof(int)); 272 ar->k_ar.ar_arg_len = namelen; 273 ARG_SET_VALID(ar, ARG_CTLNAME | ARG_LEN); 274 } 275 276 void 277 audit_arg_mask(int mask) 278 { 279 struct kaudit_record *ar; 280 281 ar = currecord(); 282 if (ar == NULL) 283 return; 284 285 ar->k_ar.ar_arg_mask = mask; 286 ARG_SET_VALID(ar, ARG_MASK); 287 } 288 289 void 290 audit_arg_mode(mode_t mode) 291 { 292 struct kaudit_record *ar; 293 294 ar = currecord(); 295 if (ar == NULL) 296 return; 297 298 ar->k_ar.ar_arg_mode = mode; 299 ARG_SET_VALID(ar, ARG_MODE); 300 } 301 302 void 303 audit_arg_dev(int dev) 304 { 305 struct kaudit_record *ar; 306 307 ar = currecord(); 308 if (ar == NULL) 309 return; 310 311 ar->k_ar.ar_arg_dev = dev; 312 ARG_SET_VALID(ar, ARG_DEV); 313 } 314 315 void 316 audit_arg_value(long value) 317 { 318 struct kaudit_record *ar; 319 320 ar = currecord(); 321 if (ar == NULL) 322 return; 323 324 ar->k_ar.ar_arg_value = value; 325 ARG_SET_VALID(ar, ARG_VALUE); 326 } 327 328 void 329 audit_arg_owner(uid_t uid, gid_t gid) 330 { 331 struct kaudit_record *ar; 332 333 ar = currecord(); 334 if (ar == NULL) 335 return; 336 337 ar->k_ar.ar_arg_uid = uid; 338 ar->k_ar.ar_arg_gid = gid; 339 ARG_SET_VALID(ar, ARG_UID | ARG_GID); 340 } 341 342 void 343 audit_arg_pid(pid_t pid) 344 { 345 struct kaudit_record *ar; 346 347 ar = currecord(); 348 if (ar == NULL) 349 return; 350 351 ar->k_ar.ar_arg_pid = pid; 352 ARG_SET_VALID(ar, ARG_PID); 353 } 354 355 void 356 audit_arg_process(struct proc *p) 357 { 358 struct kaudit_record *ar; 359 360 KASSERT(p != NULL, ("audit_arg_process: p == NULL")); 361 362 PROC_LOCK_ASSERT(p, MA_OWNED); 363 364 ar = currecord(); 365 if (ar == NULL) 366 return; 367 368 ar->k_ar.ar_arg_auid = p->p_au->ai_auid; 369 ar->k_ar.ar_arg_euid = p->p_ucred->cr_uid; 370 ar->k_ar.ar_arg_egid = p->p_ucred->cr_groups[0]; 371 ar->k_ar.ar_arg_ruid = p->p_ucred->cr_ruid; 372 ar->k_ar.ar_arg_rgid = p->p_ucred->cr_rgid; 373 ar->k_ar.ar_arg_asid = p->p_au->ai_asid; 374 ar->k_ar.ar_arg_termid = p->p_au->ai_termid; 375 ar->k_ar.ar_arg_pid = p->p_pid; 376 ARG_SET_VALID(ar, ARG_AUID | ARG_EUID | ARG_EGID | ARG_RUID | 377 ARG_RGID | ARG_ASID | ARG_TERMID | ARG_PID | ARG_PROCESS); 378 } 379 380 void 381 audit_arg_signum(u_int signum) 382 { 383 struct kaudit_record *ar; 384 385 ar = currecord(); 386 if (ar == NULL) 387 return; 388 389 ar->k_ar.ar_arg_signum = signum; 390 ARG_SET_VALID(ar, ARG_SIGNUM); 391 } 392 393 void 394 audit_arg_socket(int sodomain, int sotype, int soprotocol) 395 { 396 struct kaudit_record *ar; 397 398 ar = currecord(); 399 if (ar == NULL) 400 return; 401 402 ar->k_ar.ar_arg_sockinfo.so_domain = sodomain; 403 ar->k_ar.ar_arg_sockinfo.so_type = sotype; 404 ar->k_ar.ar_arg_sockinfo.so_protocol = soprotocol; 405 ARG_SET_VALID(ar, ARG_SOCKINFO); 406 } 407 408 void 409 audit_arg_sockaddr(struct thread *td, struct sockaddr *sa) 410 { 411 struct kaudit_record *ar; 412 413 KASSERT(td != NULL, ("audit_arg_sockaddr: td == NULL")); 414 KASSERT(sa != NULL, ("audit_arg_sockaddr: sa == NULL")); 415 416 ar = currecord(); 417 if (ar == NULL) 418 return; 419 420 bcopy(sa, &ar->k_ar.ar_arg_sockaddr, 421 sizeof(ar->k_ar.ar_arg_sockaddr)); 422 switch (sa->sa_family) { 423 case AF_INET: 424 ARG_SET_VALID(ar, ARG_SADDRINET); 425 break; 426 427 case AF_INET6: 428 ARG_SET_VALID(ar, ARG_SADDRINET6); 429 break; 430 431 case AF_UNIX: 432 audit_arg_upath(td, ((struct sockaddr_un *)sa)->sun_path, 433 ARG_UPATH1); 434 ARG_SET_VALID(ar, ARG_SADDRUNIX); 435 break; 436 /* XXXAUDIT: default:? */ 437 } 438 } 439 440 void 441 audit_arg_auid(uid_t auid) 442 { 443 struct kaudit_record *ar; 444 445 ar = currecord(); 446 if (ar == NULL) 447 return; 448 449 ar->k_ar.ar_arg_auid = auid; 450 ARG_SET_VALID(ar, ARG_AUID); 451 } 452 453 void 454 audit_arg_auditinfo(struct auditinfo *au_info) 455 { 456 struct kaudit_record *ar; 457 458 ar = currecord(); 459 if (ar == NULL) 460 return; 461 462 ar->k_ar.ar_arg_auid = au_info->ai_auid; 463 ar->k_ar.ar_arg_asid = au_info->ai_asid; 464 ar->k_ar.ar_arg_amask.am_success = au_info->ai_mask.am_success; 465 ar->k_ar.ar_arg_amask.am_failure = au_info->ai_mask.am_failure; 466 ar->k_ar.ar_arg_termid.port = au_info->ai_termid.port; 467 ar->k_ar.ar_arg_termid.machine = au_info->ai_termid.machine; 468 ARG_SET_VALID(ar, ARG_AUID | ARG_ASID | ARG_AMASK | ARG_TERMID); 469 } 470 471 void 472 audit_arg_text(char *text) 473 { 474 struct kaudit_record *ar; 475 476 KASSERT(text != NULL, ("audit_arg_text: text == NULL")); 477 478 ar = currecord(); 479 if (ar == NULL) 480 return; 481 482 /* Invalidate the text string */ 483 ar->k_ar.ar_valid_arg &= (ARG_ALL ^ ARG_TEXT); 484 485 if (ar->k_ar.ar_arg_text == NULL) 486 ar->k_ar.ar_arg_text = malloc(MAXPATHLEN, M_AUDITTEXT, 487 M_WAITOK); 488 489 strncpy(ar->k_ar.ar_arg_text, text, MAXPATHLEN); 490 ARG_SET_VALID(ar, ARG_TEXT); 491 } 492 493 void 494 audit_arg_cmd(int cmd) 495 { 496 struct kaudit_record *ar; 497 498 ar = currecord(); 499 if (ar == NULL) 500 return; 501 502 ar->k_ar.ar_arg_cmd = cmd; 503 ARG_SET_VALID(ar, ARG_CMD); 504 } 505 506 void 507 audit_arg_svipc_cmd(int cmd) 508 { 509 struct kaudit_record *ar; 510 511 ar = currecord(); 512 if (ar == NULL) 513 return; 514 515 ar->k_ar.ar_arg_svipc_cmd = cmd; 516 ARG_SET_VALID(ar, ARG_SVIPC_CMD); 517 } 518 519 void 520 audit_arg_svipc_perm(struct ipc_perm *perm) 521 { 522 struct kaudit_record *ar; 523 524 ar = currecord(); 525 if (ar == NULL) 526 return; 527 528 bcopy(perm, &ar->k_ar.ar_arg_svipc_perm, 529 sizeof(ar->k_ar.ar_arg_svipc_perm)); 530 ARG_SET_VALID(ar, ARG_SVIPC_PERM); 531 } 532 533 void 534 audit_arg_svipc_id(int id) 535 { 536 struct kaudit_record *ar; 537 538 ar = currecord(); 539 if (ar == NULL) 540 return; 541 542 ar->k_ar.ar_arg_svipc_id = id; 543 ARG_SET_VALID(ar, ARG_SVIPC_ID); 544 } 545 546 void 547 audit_arg_svipc_addr(void * addr) 548 { 549 struct kaudit_record *ar; 550 551 ar = currecord(); 552 if (ar == NULL) 553 return; 554 555 ar->k_ar.ar_arg_svipc_addr = addr; 556 ARG_SET_VALID(ar, ARG_SVIPC_ADDR); 557 } 558 559 void 560 audit_arg_posix_ipc_perm(uid_t uid, gid_t gid, mode_t mode) 561 { 562 struct kaudit_record *ar; 563 564 ar = currecord(); 565 if (ar == NULL) 566 return; 567 568 ar->k_ar.ar_arg_pipc_perm.pipc_uid = uid; 569 ar->k_ar.ar_arg_pipc_perm.pipc_gid = gid; 570 ar->k_ar.ar_arg_pipc_perm.pipc_mode = mode; 571 ARG_SET_VALID(ar, ARG_POSIX_IPC_PERM); 572 } 573 574 void 575 audit_arg_auditon(union auditon_udata *udata) 576 { 577 struct kaudit_record *ar; 578 579 ar = currecord(); 580 if (ar == NULL) 581 return; 582 583 bcopy((void *)udata, &ar->k_ar.ar_arg_auditon, 584 sizeof(ar->k_ar.ar_arg_auditon)); 585 ARG_SET_VALID(ar, ARG_AUDITON); 586 } 587 588 /* 589 * Audit information about a file, either the file's vnode info, or its 590 * socket address info. 591 */ 592 void 593 audit_arg_file(struct proc *p, struct file *fp) 594 { 595 struct kaudit_record *ar; 596 struct socket *so; 597 struct inpcb *pcb; 598 struct vnode *vp; 599 int vfslocked; 600 601 ar = currecord(); 602 if (ar == NULL) 603 return; 604 605 switch (fp->f_type) { 606 case DTYPE_VNODE: 607 case DTYPE_FIFO: 608 /* 609 * XXXAUDIT: Only possibly to record as first vnode? 610 */ 611 vp = fp->f_vnode; 612 vfslocked = VFS_LOCK_GIANT(vp->v_mount); 613 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, curthread); 614 audit_arg_vnode(vp, ARG_VNODE1); 615 VOP_UNLOCK(vp, 0, curthread); 616 VFS_UNLOCK_GIANT(vfslocked); 617 break; 618 619 case DTYPE_SOCKET: 620 so = (struct socket *)fp->f_data; 621 SOCK_LOCK(so); 622 if (INP_CHECK_SOCKAF(so, PF_INET)) { 623 if (so->so_pcb == NULL) 624 return; 625 ar->k_ar.ar_arg_sockinfo.so_type = 626 so->so_type; 627 ar->k_ar.ar_arg_sockinfo.so_domain = 628 INP_SOCKAF(so); 629 ar->k_ar.ar_arg_sockinfo.so_protocol = 630 so->so_proto->pr_protocol; 631 pcb = (struct inpcb *)so->so_pcb; 632 ar->k_ar.ar_arg_sockinfo.so_raddr = 633 pcb->inp_faddr.s_addr; 634 ar->k_ar.ar_arg_sockinfo.so_laddr = 635 pcb->inp_laddr.s_addr; 636 ar->k_ar.ar_arg_sockinfo.so_rport = 637 pcb->inp_fport; 638 ar->k_ar.ar_arg_sockinfo.so_lport = 639 pcb->inp_lport; 640 ARG_SET_VALID(ar, ARG_SOCKINFO); 641 } 642 SOCK_UNLOCK(so); 643 break; 644 645 default: 646 /* XXXAUDIT: else? */ 647 break; 648 } 649 650 } 651 652 /* 653 * Store a path as given by the user process for auditing into the audit 654 * record stored on the user thread. This function will allocate the memory 655 * to store the path info if not already available. This memory will be freed 656 * when the audit record is freed. 657 * 658 * XXXAUDIT: Possibly assert that the memory isn't already allocated? 659 */ 660 void 661 audit_arg_upath(struct thread *td, char *upath, u_int64_t flag) 662 { 663 struct kaudit_record *ar; 664 char **pathp; 665 666 KASSERT(td != NULL, ("audit_arg_upath: td == NULL")); 667 KASSERT(upath != NULL, ("audit_arg_upath: upath == NULL")); 668 669 ar = currecord(); 670 if (ar == NULL) 671 return; 672 673 /* 674 * XXXAUDIT: Witness warning for possible sleep here? 675 */ 676 KASSERT((flag == ARG_UPATH1) || (flag == ARG_UPATH2), 677 ("audit_arg_upath: flag %llu", (unsigned long long)flag)); 678 KASSERT((flag != ARG_UPATH1) || (flag != ARG_UPATH2), 679 ("audit_arg_upath: flag %llu", (unsigned long long)flag)); 680 681 if (flag == ARG_UPATH1) 682 pathp = &ar->k_ar.ar_arg_upath1; 683 else 684 pathp = &ar->k_ar.ar_arg_upath2; 685 686 if (*pathp == NULL) 687 *pathp = malloc(MAXPATHLEN, M_AUDITPATH, M_WAITOK); 688 689 canon_path(td, upath, *pathp); 690 691 ARG_SET_VALID(ar, flag); 692 } 693 694 /* 695 * Function to save the path and vnode attr information into the audit 696 * record. 697 * 698 * It is assumed that the caller will hold any vnode locks necessary to 699 * perform a VOP_GETATTR() on the passed vnode. 700 * 701 * XXX: The attr code is very similar to vfs_vnops.c:vn_stat(), but 702 * always provides access to the generation number as we need that 703 * to construct the BSM file ID. 704 * XXX: We should accept the process argument from the caller, since 705 * it's very likely they already have a reference. 706 * XXX: Error handling in this function is poor. 707 * 708 * XXXAUDIT: Possibly KASSERT the path pointer is NULL? 709 */ 710 void 711 audit_arg_vnode(struct vnode *vp, u_int64_t flags) 712 { 713 struct kaudit_record *ar; 714 struct vattr vattr; 715 int error; 716 struct vnode_au_info *vnp; 717 718 KASSERT(vp != NULL, ("audit_arg_vnode: vp == NULL")); 719 KASSERT((flags == ARG_VNODE1) || (flags == ARG_VNODE2), 720 ("audit_arg_vnode: flags %jd", (intmax_t)flags)); 721 722 /* 723 * Assume that if the caller is calling audit_arg_vnode() on a 724 * non-MPSAFE vnode, then it will have acquired Giant. 725 */ 726 VFS_ASSERT_GIANT(vp->v_mount); 727 ASSERT_VOP_LOCKED(vp, "audit_arg_vnode"); 728 729 ar = currecord(); 730 if (ar == NULL) 731 return; 732 733 /* 734 * XXXAUDIT: The below clears, and then resets the flags for valid 735 * arguments. Ideally, either the new vnode is used, or the old one 736 * would be. 737 */ 738 if (flags & ARG_VNODE1) { 739 ar->k_ar.ar_valid_arg &= (ARG_ALL ^ ARG_VNODE1); 740 vnp = &ar->k_ar.ar_arg_vnode1; 741 } else { 742 ar->k_ar.ar_valid_arg &= (ARG_ALL ^ ARG_VNODE2); 743 vnp = &ar->k_ar.ar_arg_vnode2; 744 } 745 746 error = VOP_GETATTR(vp, &vattr, curthread->td_ucred, curthread); 747 if (error) { 748 /* XXX: How to handle this case? */ 749 return; 750 } 751 752 vnp->vn_mode = vattr.va_mode; 753 vnp->vn_uid = vattr.va_uid; 754 vnp->vn_gid = vattr.va_gid; 755 vnp->vn_dev = vattr.va_rdev; 756 vnp->vn_fsid = vattr.va_fsid; 757 vnp->vn_fileid = vattr.va_fileid; 758 vnp->vn_gen = vattr.va_gen; 759 if (flags & ARG_VNODE1) 760 ARG_SET_VALID(ar, ARG_VNODE1); 761 else 762 ARG_SET_VALID(ar, ARG_VNODE2); 763 } 764 765 /* 766 * Audit the argument strings passed to exec. 767 */ 768 void 769 audit_arg_argv(char *argv, int argc, int length) 770 { 771 struct kaudit_record *ar; 772 773 if (audit_argv == 0) 774 return; 775 776 ar = currecord(); 777 if (ar == NULL) 778 return; 779 780 ar->k_ar.ar_arg_argv = malloc(length, M_AUDITTEXT, M_WAITOK); 781 bcopy(argv, ar->k_ar.ar_arg_argv, length); 782 ar->k_ar.ar_arg_argc = argc; 783 ARG_SET_VALID(ar, ARG_ARGV); 784 } 785 786 /* 787 * Audit the environment strings passed to exec. 788 */ 789 void 790 audit_arg_envv(char *envv, int envc, int length) 791 { 792 struct kaudit_record *ar; 793 794 if (audit_arge == 0) 795 return; 796 797 ar = currecord(); 798 if (ar == NULL) 799 return; 800 801 ar->k_ar.ar_arg_envv = malloc(length, M_AUDITTEXT, M_WAITOK); 802 bcopy(envv, ar->k_ar.ar_arg_envv, length); 803 ar->k_ar.ar_arg_envc = envc; 804 ARG_SET_VALID(ar, ARG_ENVV); 805 } 806 807 /* 808 * The close() system call uses it's own audit call to capture the path/vnode 809 * information because those pieces are not easily obtained within the system 810 * call itself. 811 */ 812 void 813 audit_sysclose(struct thread *td, int fd) 814 { 815 struct kaudit_record *ar; 816 struct vnode *vp; 817 struct file *fp; 818 int vfslocked; 819 820 KASSERT(td != NULL, ("audit_sysclose: td == NULL")); 821 822 ar = currecord(); 823 if (ar == NULL) 824 return; 825 826 audit_arg_fd(fd); 827 828 if (getvnode(td->td_proc->p_fd, fd, &fp) != 0) 829 return; 830 831 vp = fp->f_vnode; 832 vfslocked = VFS_LOCK_GIANT(vp->v_mount); 833 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td); 834 audit_arg_vnode(vp, ARG_VNODE1); 835 VOP_UNLOCK(vp, 0, td); 836 VFS_UNLOCK_GIANT(vfslocked); 837 fdrop(fp, td); 838 } 839