audit_arg.c revision 184661
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: head/sys/security/audit/audit_arg.c 184661 2008-11-04 22:31:04Z jhb $"); 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 */ 63void 64audit_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 76void 77audit_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 90void 91audit_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 103void 104audit_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 116void 117audit_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 129void 130audit_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 142void 143audit_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 155void 156audit_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 168void 169audit_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 181void 182audit_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 194void 195audit_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 207void 208audit_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 220void 221audit_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 233void 234audit_arg_groupset(gid_t *gidset, u_int gidset_size) 235{ 236 u_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 249void 250audit_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 262void 263audit_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 276void 277audit_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 289void 290audit_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 302void 303audit_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 315void 316audit_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 328void 329audit_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 342void 343audit_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 355void 356audit_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_ucred->cr_audit.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_ucred->cr_audit.ai_asid; 374 ar->k_ar.ar_arg_termid_addr = p->p_ucred->cr_audit.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_ADDR | ARG_PID | ARG_PROCESS); 378} 379 380void 381audit_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 393void 394audit_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 408void 409audit_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, sa->sa_len); 421 switch (sa->sa_family) { 422 case AF_INET: 423 ARG_SET_VALID(ar, ARG_SADDRINET); 424 break; 425 426 case AF_INET6: 427 ARG_SET_VALID(ar, ARG_SADDRINET6); 428 break; 429 430 case AF_UNIX: 431 audit_arg_upath(td, ((struct sockaddr_un *)sa)->sun_path, 432 ARG_UPATH1); 433 ARG_SET_VALID(ar, ARG_SADDRUNIX); 434 break; 435 /* XXXAUDIT: default:? */ 436 } 437} 438 439void 440audit_arg_auid(uid_t auid) 441{ 442 struct kaudit_record *ar; 443 444 ar = currecord(); 445 if (ar == NULL) 446 return; 447 448 ar->k_ar.ar_arg_auid = auid; 449 ARG_SET_VALID(ar, ARG_AUID); 450} 451 452void 453audit_arg_auditinfo(struct auditinfo *au_info) 454{ 455 struct kaudit_record *ar; 456 457 ar = currecord(); 458 if (ar == NULL) 459 return; 460 461 ar->k_ar.ar_arg_auid = au_info->ai_auid; 462 ar->k_ar.ar_arg_asid = au_info->ai_asid; 463 ar->k_ar.ar_arg_amask.am_success = au_info->ai_mask.am_success; 464 ar->k_ar.ar_arg_amask.am_failure = au_info->ai_mask.am_failure; 465 ar->k_ar.ar_arg_termid.port = au_info->ai_termid.port; 466 ar->k_ar.ar_arg_termid.machine = au_info->ai_termid.machine; 467 ARG_SET_VALID(ar, ARG_AUID | ARG_ASID | ARG_AMASK | ARG_TERMID); 468} 469 470void 471audit_arg_auditinfo_addr(struct auditinfo_addr *au_info) 472{ 473 struct kaudit_record *ar; 474 475 ar = currecord(); 476 if (ar == NULL) 477 return; 478 479 ar->k_ar.ar_arg_auid = au_info->ai_auid; 480 ar->k_ar.ar_arg_asid = au_info->ai_asid; 481 ar->k_ar.ar_arg_amask.am_success = au_info->ai_mask.am_success; 482 ar->k_ar.ar_arg_amask.am_failure = au_info->ai_mask.am_failure; 483 ar->k_ar.ar_arg_termid_addr.at_type = au_info->ai_termid.at_type; 484 ar->k_ar.ar_arg_termid_addr.at_port = au_info->ai_termid.at_port; 485 ar->k_ar.ar_arg_termid_addr.at_addr[0] = au_info->ai_termid.at_addr[0]; 486 ar->k_ar.ar_arg_termid_addr.at_addr[1] = au_info->ai_termid.at_addr[1]; 487 ar->k_ar.ar_arg_termid_addr.at_addr[2] = au_info->ai_termid.at_addr[2]; 488 ar->k_ar.ar_arg_termid_addr.at_addr[3] = au_info->ai_termid.at_addr[3]; 489 ARG_SET_VALID(ar, ARG_AUID | ARG_ASID | ARG_AMASK | ARG_TERMID_ADDR); 490} 491 492void 493audit_arg_text(char *text) 494{ 495 struct kaudit_record *ar; 496 497 KASSERT(text != NULL, ("audit_arg_text: text == NULL")); 498 499 ar = currecord(); 500 if (ar == NULL) 501 return; 502 503 /* Invalidate the text string */ 504 ar->k_ar.ar_valid_arg &= (ARG_ALL ^ ARG_TEXT); 505 506 if (ar->k_ar.ar_arg_text == NULL) 507 ar->k_ar.ar_arg_text = malloc(MAXPATHLEN, M_AUDITTEXT, 508 M_WAITOK); 509 510 strncpy(ar->k_ar.ar_arg_text, text, MAXPATHLEN); 511 ARG_SET_VALID(ar, ARG_TEXT); 512} 513 514void 515audit_arg_cmd(int cmd) 516{ 517 struct kaudit_record *ar; 518 519 ar = currecord(); 520 if (ar == NULL) 521 return; 522 523 ar->k_ar.ar_arg_cmd = cmd; 524 ARG_SET_VALID(ar, ARG_CMD); 525} 526 527void 528audit_arg_svipc_cmd(int cmd) 529{ 530 struct kaudit_record *ar; 531 532 ar = currecord(); 533 if (ar == NULL) 534 return; 535 536 ar->k_ar.ar_arg_svipc_cmd = cmd; 537 ARG_SET_VALID(ar, ARG_SVIPC_CMD); 538} 539 540void 541audit_arg_svipc_perm(struct ipc_perm *perm) 542{ 543 struct kaudit_record *ar; 544 545 ar = currecord(); 546 if (ar == NULL) 547 return; 548 549 bcopy(perm, &ar->k_ar.ar_arg_svipc_perm, 550 sizeof(ar->k_ar.ar_arg_svipc_perm)); 551 ARG_SET_VALID(ar, ARG_SVIPC_PERM); 552} 553 554void 555audit_arg_svipc_id(int id) 556{ 557 struct kaudit_record *ar; 558 559 ar = currecord(); 560 if (ar == NULL) 561 return; 562 563 ar->k_ar.ar_arg_svipc_id = id; 564 ARG_SET_VALID(ar, ARG_SVIPC_ID); 565} 566 567void 568audit_arg_svipc_addr(void * addr) 569{ 570 struct kaudit_record *ar; 571 572 ar = currecord(); 573 if (ar == NULL) 574 return; 575 576 ar->k_ar.ar_arg_svipc_addr = addr; 577 ARG_SET_VALID(ar, ARG_SVIPC_ADDR); 578} 579 580void 581audit_arg_posix_ipc_perm(uid_t uid, gid_t gid, mode_t mode) 582{ 583 struct kaudit_record *ar; 584 585 ar = currecord(); 586 if (ar == NULL) 587 return; 588 589 ar->k_ar.ar_arg_pipc_perm.pipc_uid = uid; 590 ar->k_ar.ar_arg_pipc_perm.pipc_gid = gid; 591 ar->k_ar.ar_arg_pipc_perm.pipc_mode = mode; 592 ARG_SET_VALID(ar, ARG_POSIX_IPC_PERM); 593} 594 595void 596audit_arg_auditon(union auditon_udata *udata) 597{ 598 struct kaudit_record *ar; 599 600 ar = currecord(); 601 if (ar == NULL) 602 return; 603 604 bcopy((void *)udata, &ar->k_ar.ar_arg_auditon, 605 sizeof(ar->k_ar.ar_arg_auditon)); 606 ARG_SET_VALID(ar, ARG_AUDITON); 607} 608 609/* 610 * Audit information about a file, either the file's vnode info, or its 611 * socket address info. 612 */ 613void 614audit_arg_file(struct proc *p, struct file *fp) 615{ 616 struct kaudit_record *ar; 617 struct socket *so; 618 struct inpcb *pcb; 619 struct vnode *vp; 620 int vfslocked; 621 622 ar = currecord(); 623 if (ar == NULL) 624 return; 625 626 switch (fp->f_type) { 627 case DTYPE_VNODE: 628 case DTYPE_FIFO: 629 /* 630 * XXXAUDIT: Only possibly to record as first vnode? 631 */ 632 vp = fp->f_vnode; 633 vfslocked = VFS_LOCK_GIANT(vp->v_mount); 634 vn_lock(vp, LK_SHARED | LK_RETRY); 635 audit_arg_vnode(vp, ARG_VNODE1); 636 VOP_UNLOCK(vp, 0); 637 VFS_UNLOCK_GIANT(vfslocked); 638 break; 639 640 case DTYPE_SOCKET: 641 so = (struct socket *)fp->f_data; 642 if (INP_CHECK_SOCKAF(so, PF_INET)) { 643 SOCK_LOCK(so); 644 ar->k_ar.ar_arg_sockinfo.so_type = 645 so->so_type; 646 ar->k_ar.ar_arg_sockinfo.so_domain = 647 INP_SOCKAF(so); 648 ar->k_ar.ar_arg_sockinfo.so_protocol = 649 so->so_proto->pr_protocol; 650 SOCK_UNLOCK(so); 651 pcb = (struct inpcb *)so->so_pcb; 652 INP_RLOCK(pcb); 653 ar->k_ar.ar_arg_sockinfo.so_raddr = 654 pcb->inp_faddr.s_addr; 655 ar->k_ar.ar_arg_sockinfo.so_laddr = 656 pcb->inp_laddr.s_addr; 657 ar->k_ar.ar_arg_sockinfo.so_rport = 658 pcb->inp_fport; 659 ar->k_ar.ar_arg_sockinfo.so_lport = 660 pcb->inp_lport; 661 INP_RUNLOCK(pcb); 662 ARG_SET_VALID(ar, ARG_SOCKINFO); 663 } 664 break; 665 666 default: 667 /* XXXAUDIT: else? */ 668 break; 669 } 670} 671 672/* 673 * Store a path as given by the user process for auditing into the audit 674 * record stored on the user thread. This function will allocate the memory 675 * to store the path info if not already available. This memory will be 676 * freed when the audit record is freed. 677 * 678 * XXXAUDIT: Possibly assert that the memory isn't already allocated? 679 */ 680void 681audit_arg_upath(struct thread *td, char *upath, u_int64_t flag) 682{ 683 struct kaudit_record *ar; 684 char **pathp; 685 686 KASSERT(td != NULL, ("audit_arg_upath: td == NULL")); 687 KASSERT(upath != NULL, ("audit_arg_upath: upath == NULL")); 688 689 ar = currecord(); 690 if (ar == NULL) 691 return; 692 693 KASSERT((flag == ARG_UPATH1) || (flag == ARG_UPATH2), 694 ("audit_arg_upath: flag %llu", (unsigned long long)flag)); 695 KASSERT((flag != ARG_UPATH1) || (flag != ARG_UPATH2), 696 ("audit_arg_upath: flag %llu", (unsigned long long)flag)); 697 698 if (flag == ARG_UPATH1) 699 pathp = &ar->k_ar.ar_arg_upath1; 700 else 701 pathp = &ar->k_ar.ar_arg_upath2; 702 703 if (*pathp == NULL) 704 *pathp = malloc(MAXPATHLEN, M_AUDITPATH, M_WAITOK); 705 706 audit_canon_path(td, upath, *pathp); 707 708 ARG_SET_VALID(ar, flag); 709} 710 711/* 712 * Function to save the path and vnode attr information into the audit 713 * record. 714 * 715 * It is assumed that the caller will hold any vnode locks necessary to 716 * perform a VOP_GETATTR() on the passed vnode. 717 * 718 * XXX: The attr code is very similar to vfs_vnops.c:vn_stat(), but always 719 * provides access to the generation number as we need that to construct the 720 * BSM file ID. 721 * 722 * XXX: We should accept the process argument from the caller, since it's 723 * very likely they already have a reference. 724 * 725 * XXX: Error handling in this function is poor. 726 * 727 * XXXAUDIT: Possibly KASSERT the path pointer is NULL? 728 */ 729void 730audit_arg_vnode(struct vnode *vp, u_int64_t flags) 731{ 732 struct kaudit_record *ar; 733 struct vattr vattr; 734 int error; 735 struct vnode_au_info *vnp; 736 737 KASSERT(vp != NULL, ("audit_arg_vnode: vp == NULL")); 738 KASSERT((flags == ARG_VNODE1) || (flags == ARG_VNODE2), 739 ("audit_arg_vnode: flags %jd", (intmax_t)flags)); 740 741 /* 742 * Assume that if the caller is calling audit_arg_vnode() on a 743 * non-MPSAFE vnode, then it will have acquired Giant. 744 */ 745 VFS_ASSERT_GIANT(vp->v_mount); 746 ASSERT_VOP_LOCKED(vp, "audit_arg_vnode"); 747 748 ar = currecord(); 749 if (ar == NULL) 750 return; 751 752 /* 753 * XXXAUDIT: The below clears, and then resets the flags for valid 754 * arguments. Ideally, either the new vnode is used, or the old one 755 * would be. 756 */ 757 if (flags & ARG_VNODE1) { 758 ar->k_ar.ar_valid_arg &= (ARG_ALL ^ ARG_VNODE1); 759 vnp = &ar->k_ar.ar_arg_vnode1; 760 } else { 761 ar->k_ar.ar_valid_arg &= (ARG_ALL ^ ARG_VNODE2); 762 vnp = &ar->k_ar.ar_arg_vnode2; 763 } 764 765 error = VOP_GETATTR(vp, &vattr, curthread->td_ucred); 766 if (error) { 767 /* XXX: How to handle this case? */ 768 return; 769 } 770 771 vnp->vn_mode = vattr.va_mode; 772 vnp->vn_uid = vattr.va_uid; 773 vnp->vn_gid = vattr.va_gid; 774 vnp->vn_dev = vattr.va_rdev; 775 vnp->vn_fsid = vattr.va_fsid; 776 vnp->vn_fileid = vattr.va_fileid; 777 vnp->vn_gen = vattr.va_gen; 778 if (flags & ARG_VNODE1) 779 ARG_SET_VALID(ar, ARG_VNODE1); 780 else 781 ARG_SET_VALID(ar, ARG_VNODE2); 782} 783 784/* 785 * Audit the argument strings passed to exec. 786 */ 787void 788audit_arg_argv(char *argv, int argc, int length) 789{ 790 struct kaudit_record *ar; 791 792 if (audit_argv == 0) 793 return; 794 795 ar = currecord(); 796 if (ar == NULL) 797 return; 798 799 ar->k_ar.ar_arg_argv = malloc(length, M_AUDITTEXT, M_WAITOK); 800 bcopy(argv, ar->k_ar.ar_arg_argv, length); 801 ar->k_ar.ar_arg_argc = argc; 802 ARG_SET_VALID(ar, ARG_ARGV); 803} 804 805/* 806 * Audit the environment strings passed to exec. 807 */ 808void 809audit_arg_envv(char *envv, int envc, int length) 810{ 811 struct kaudit_record *ar; 812 813 if (audit_arge == 0) 814 return; 815 816 ar = currecord(); 817 if (ar == NULL) 818 return; 819 820 ar->k_ar.ar_arg_envv = malloc(length, M_AUDITTEXT, M_WAITOK); 821 bcopy(envv, ar->k_ar.ar_arg_envv, length); 822 ar->k_ar.ar_arg_envc = envc; 823 ARG_SET_VALID(ar, ARG_ENVV); 824} 825 826/* 827 * The close() system call uses it's own audit call to capture the path/vnode 828 * information because those pieces are not easily obtained within the system 829 * call itself. 830 */ 831void 832audit_sysclose(struct thread *td, int fd) 833{ 834 struct kaudit_record *ar; 835 struct vnode *vp; 836 struct file *fp; 837 int vfslocked; 838 839 KASSERT(td != NULL, ("audit_sysclose: td == NULL")); 840 841 ar = currecord(); 842 if (ar == NULL) 843 return; 844 845 audit_arg_fd(fd); 846 847 if (getvnode(td->td_proc->p_fd, fd, &fp) != 0) 848 return; 849 850 vp = fp->f_vnode; 851 vfslocked = VFS_LOCK_GIANT(vp->v_mount); 852 vn_lock(vp, LK_SHARED | LK_RETRY); 853 audit_arg_vnode(vp, ARG_VNODE1); 854 VOP_UNLOCK(vp, 0); 855 VFS_UNLOCK_GIANT(vfslocked); 856 fdrop(fp, td); 857} 858