audit_arg.c revision 195926
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 195926 2009-07-28 21:52:24Z rwatson $"); 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_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 116void 117audit_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 129void 130audit_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 142void 143audit_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 155void 156audit_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 168void 169audit_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 181void 182audit_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 194void 195audit_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 207void 208audit_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 220void 221audit_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 233void 234audit_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 246void 247audit_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 259void 260audit_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, 266 ("audit_arg_groupset: gidset_size > NGROUPS")); 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 282void 283audit_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 295void 296audit_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 309void 310audit_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 322void 323audit_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 335void 336audit_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 348void 349audit_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 361void 362audit_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 375void 376audit_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 388void 389audit_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 415void 416audit_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 428void 429audit_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 443void 444audit_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_upath(td, ((struct sockaddr_un *)sa)->sun_path, 467 ARG_UPATH1); 468 ARG_SET_VALID(ar, ARG_SADDRUNIX); 469 break; 470 /* XXXAUDIT: default:? */ 471 } 472} 473 474void 475audit_arg_auid(uid_t auid) 476{ 477 struct kaudit_record *ar; 478 479 ar = currecord(); 480 if (ar == NULL) 481 return; 482 483 ar->k_ar.ar_arg_auid = auid; 484 ARG_SET_VALID(ar, ARG_AUID); 485} 486 487void 488audit_arg_auditinfo(struct auditinfo *au_info) 489{ 490 struct kaudit_record *ar; 491 492 ar = currecord(); 493 if (ar == NULL) 494 return; 495 496 ar->k_ar.ar_arg_auid = au_info->ai_auid; 497 ar->k_ar.ar_arg_asid = au_info->ai_asid; 498 ar->k_ar.ar_arg_amask.am_success = au_info->ai_mask.am_success; 499 ar->k_ar.ar_arg_amask.am_failure = au_info->ai_mask.am_failure; 500 ar->k_ar.ar_arg_termid.port = au_info->ai_termid.port; 501 ar->k_ar.ar_arg_termid.machine = au_info->ai_termid.machine; 502 ARG_SET_VALID(ar, ARG_AUID | ARG_ASID | ARG_AMASK | ARG_TERMID); 503} 504 505void 506audit_arg_auditinfo_addr(struct auditinfo_addr *au_info) 507{ 508 struct kaudit_record *ar; 509 510 ar = currecord(); 511 if (ar == NULL) 512 return; 513 514 ar->k_ar.ar_arg_auid = au_info->ai_auid; 515 ar->k_ar.ar_arg_asid = au_info->ai_asid; 516 ar->k_ar.ar_arg_amask.am_success = au_info->ai_mask.am_success; 517 ar->k_ar.ar_arg_amask.am_failure = au_info->ai_mask.am_failure; 518 ar->k_ar.ar_arg_termid_addr.at_type = au_info->ai_termid.at_type; 519 ar->k_ar.ar_arg_termid_addr.at_port = au_info->ai_termid.at_port; 520 ar->k_ar.ar_arg_termid_addr.at_addr[0] = au_info->ai_termid.at_addr[0]; 521 ar->k_ar.ar_arg_termid_addr.at_addr[1] = au_info->ai_termid.at_addr[1]; 522 ar->k_ar.ar_arg_termid_addr.at_addr[2] = au_info->ai_termid.at_addr[2]; 523 ar->k_ar.ar_arg_termid_addr.at_addr[3] = au_info->ai_termid.at_addr[3]; 524 ARG_SET_VALID(ar, ARG_AUID | ARG_ASID | ARG_AMASK | ARG_TERMID_ADDR); 525} 526 527void 528audit_arg_text(char *text) 529{ 530 struct kaudit_record *ar; 531 532 KASSERT(text != NULL, ("audit_arg_text: text == NULL")); 533 534 ar = currecord(); 535 if (ar == NULL) 536 return; 537 538 /* Invalidate the text string */ 539 ar->k_ar.ar_valid_arg &= (ARG_ALL ^ ARG_TEXT); 540 541 if (ar->k_ar.ar_arg_text == NULL) 542 ar->k_ar.ar_arg_text = malloc(MAXPATHLEN, M_AUDITTEXT, 543 M_WAITOK); 544 545 strncpy(ar->k_ar.ar_arg_text, text, MAXPATHLEN); 546 ARG_SET_VALID(ar, ARG_TEXT); 547} 548 549void 550audit_arg_cmd(int cmd) 551{ 552 struct kaudit_record *ar; 553 554 ar = currecord(); 555 if (ar == NULL) 556 return; 557 558 ar->k_ar.ar_arg_cmd = cmd; 559 ARG_SET_VALID(ar, ARG_CMD); 560} 561 562void 563audit_arg_svipc_cmd(int cmd) 564{ 565 struct kaudit_record *ar; 566 567 ar = currecord(); 568 if (ar == NULL) 569 return; 570 571 ar->k_ar.ar_arg_svipc_cmd = cmd; 572 ARG_SET_VALID(ar, ARG_SVIPC_CMD); 573} 574 575void 576audit_arg_svipc_perm(struct ipc_perm *perm) 577{ 578 struct kaudit_record *ar; 579 580 ar = currecord(); 581 if (ar == NULL) 582 return; 583 584 bcopy(perm, &ar->k_ar.ar_arg_svipc_perm, 585 sizeof(ar->k_ar.ar_arg_svipc_perm)); 586 ARG_SET_VALID(ar, ARG_SVIPC_PERM); 587} 588 589void 590audit_arg_svipc_id(int id) 591{ 592 struct kaudit_record *ar; 593 594 ar = currecord(); 595 if (ar == NULL) 596 return; 597 598 ar->k_ar.ar_arg_svipc_id = id; 599 ARG_SET_VALID(ar, ARG_SVIPC_ID); 600} 601 602void 603audit_arg_svipc_addr(void * addr) 604{ 605 struct kaudit_record *ar; 606 607 ar = currecord(); 608 if (ar == NULL) 609 return; 610 611 ar->k_ar.ar_arg_svipc_addr = addr; 612 ARG_SET_VALID(ar, ARG_SVIPC_ADDR); 613} 614 615void 616audit_arg_posix_ipc_perm(uid_t uid, gid_t gid, mode_t mode) 617{ 618 struct kaudit_record *ar; 619 620 ar = currecord(); 621 if (ar == NULL) 622 return; 623 624 ar->k_ar.ar_arg_pipc_perm.pipc_uid = uid; 625 ar->k_ar.ar_arg_pipc_perm.pipc_gid = gid; 626 ar->k_ar.ar_arg_pipc_perm.pipc_mode = mode; 627 ARG_SET_VALID(ar, ARG_POSIX_IPC_PERM); 628} 629 630void 631audit_arg_auditon(union auditon_udata *udata) 632{ 633 struct kaudit_record *ar; 634 635 ar = currecord(); 636 if (ar == NULL) 637 return; 638 639 bcopy((void *)udata, &ar->k_ar.ar_arg_auditon, 640 sizeof(ar->k_ar.ar_arg_auditon)); 641 ARG_SET_VALID(ar, ARG_AUDITON); 642} 643 644/* 645 * Audit information about a file, either the file's vnode info, or its 646 * socket address info. 647 */ 648void 649audit_arg_file(struct proc *p, struct file *fp) 650{ 651 struct kaudit_record *ar; 652 struct socket *so; 653 struct inpcb *pcb; 654 struct vnode *vp; 655 int vfslocked; 656 657 ar = currecord(); 658 if (ar == NULL) 659 return; 660 661 switch (fp->f_type) { 662 case DTYPE_VNODE: 663 case DTYPE_FIFO: 664 /* 665 * XXXAUDIT: Only possibly to record as first vnode? 666 */ 667 vp = fp->f_vnode; 668 vfslocked = VFS_LOCK_GIANT(vp->v_mount); 669 vn_lock(vp, LK_SHARED | LK_RETRY); 670 audit_arg_vnode1(vp); 671 VOP_UNLOCK(vp, 0); 672 VFS_UNLOCK_GIANT(vfslocked); 673 break; 674 675 case DTYPE_SOCKET: 676 so = (struct socket *)fp->f_data; 677 if (INP_CHECK_SOCKAF(so, PF_INET)) { 678 SOCK_LOCK(so); 679 ar->k_ar.ar_arg_sockinfo.so_type = 680 so->so_type; 681 ar->k_ar.ar_arg_sockinfo.so_domain = 682 INP_SOCKAF(so); 683 ar->k_ar.ar_arg_sockinfo.so_protocol = 684 so->so_proto->pr_protocol; 685 SOCK_UNLOCK(so); 686 pcb = (struct inpcb *)so->so_pcb; 687 INP_RLOCK(pcb); 688 ar->k_ar.ar_arg_sockinfo.so_raddr = 689 pcb->inp_faddr.s_addr; 690 ar->k_ar.ar_arg_sockinfo.so_laddr = 691 pcb->inp_laddr.s_addr; 692 ar->k_ar.ar_arg_sockinfo.so_rport = 693 pcb->inp_fport; 694 ar->k_ar.ar_arg_sockinfo.so_lport = 695 pcb->inp_lport; 696 INP_RUNLOCK(pcb); 697 ARG_SET_VALID(ar, ARG_SOCKINFO); 698 } 699 break; 700 701 default: 702 /* XXXAUDIT: else? */ 703 break; 704 } 705} 706 707/* 708 * Store a path as given by the user process for auditing into the audit 709 * record stored on the user thread. This function will allocate the memory 710 * to store the path info if not already available. This memory will be 711 * freed when the audit record is freed. 712 * 713 * XXXAUDIT: Possibly assert that the memory isn't already allocated? 714 */ 715void 716audit_arg_upath(struct thread *td, char *upath, u_int64_t flag) 717{ 718 struct kaudit_record *ar; 719 char **pathp; 720 721 KASSERT(td != NULL, ("audit_arg_upath: td == NULL")); 722 KASSERT(upath != NULL, ("audit_arg_upath: upath == NULL")); 723 724 ar = currecord(); 725 if (ar == NULL) 726 return; 727 728 KASSERT((flag == ARG_UPATH1) || (flag == ARG_UPATH2), 729 ("audit_arg_upath: flag %llu", (unsigned long long)flag)); 730 KASSERT((flag != ARG_UPATH1) || (flag != ARG_UPATH2), 731 ("audit_arg_upath: flag %llu", (unsigned long long)flag)); 732 733 if (flag == ARG_UPATH1) 734 pathp = &ar->k_ar.ar_arg_upath1; 735 else 736 pathp = &ar->k_ar.ar_arg_upath2; 737 738 if (*pathp == NULL) 739 *pathp = malloc(MAXPATHLEN, M_AUDITPATH, M_WAITOK); 740 741 audit_canon_path(td, upath, *pathp); 742 743 ARG_SET_VALID(ar, flag); 744} 745 746/* 747 * Function to save the path and vnode attr information into the audit 748 * record. 749 * 750 * It is assumed that the caller will hold any vnode locks necessary to 751 * perform a VOP_GETATTR() on the passed vnode. 752 * 753 * XXX: The attr code is very similar to vfs_vnops.c:vn_stat(), but always 754 * provides access to the generation number as we need that to construct the 755 * BSM file ID. 756 * 757 * XXX: We should accept the process argument from the caller, since it's 758 * very likely they already have a reference. 759 * 760 * XXX: Error handling in this function is poor. 761 * 762 * XXXAUDIT: Possibly KASSERT the path pointer is NULL? 763 */ 764static int 765audit_arg_vnode(struct vnode *vp, struct vnode_au_info *vnp) 766{ 767 struct vattr vattr; 768 int error; 769 770 /* 771 * Assume that if the caller is calling audit_arg_vnode() on a 772 * non-MPSAFE vnode, then it will have acquired Giant. 773 */ 774 VFS_ASSERT_GIANT(vp->v_mount); 775 ASSERT_VOP_LOCKED(vp, "audit_arg_vnode"); 776 777 error = VOP_GETATTR(vp, &vattr, curthread->td_ucred); 778 if (error) { 779 /* XXX: How to handle this case? */ 780 return (error); 781 } 782 783 vnp->vn_mode = vattr.va_mode; 784 vnp->vn_uid = vattr.va_uid; 785 vnp->vn_gid = vattr.va_gid; 786 vnp->vn_dev = vattr.va_rdev; 787 vnp->vn_fsid = vattr.va_fsid; 788 vnp->vn_fileid = vattr.va_fileid; 789 vnp->vn_gen = vattr.va_gen; 790 return (0); 791} 792 793void 794audit_arg_vnode1(struct vnode *vp) 795{ 796 struct kaudit_record *ar; 797 int error; 798 799 ar = currecord(); 800 if (ar == NULL) 801 return; 802 803 ARG_CLEAR_VALID(ar, ARG_VNODE1); 804 error = audit_arg_vnode(vp, &ar->k_ar.ar_arg_vnode1); 805 if (error == 0) 806 ARG_SET_VALID(ar, ARG_VNODE1); 807} 808 809void 810audit_arg_vnode2(struct vnode *vp) 811{ 812 struct kaudit_record *ar; 813 int error; 814 815 ar = currecord(); 816 if (ar == NULL) 817 return; 818 819 ARG_CLEAR_VALID(ar, ARG_VNODE2); 820 error = audit_arg_vnode(vp, &ar->k_ar.ar_arg_vnode2); 821 if (error == 0) 822 ARG_SET_VALID(ar, ARG_VNODE2); 823} 824 825/* 826 * Audit the argument strings passed to exec. 827 */ 828void 829audit_arg_argv(char *argv, int argc, int length) 830{ 831 struct kaudit_record *ar; 832 833 if (audit_argv == 0) 834 return; 835 836 ar = currecord(); 837 if (ar == NULL) 838 return; 839 840 ar->k_ar.ar_arg_argv = malloc(length, M_AUDITTEXT, M_WAITOK); 841 bcopy(argv, ar->k_ar.ar_arg_argv, length); 842 ar->k_ar.ar_arg_argc = argc; 843 ARG_SET_VALID(ar, ARG_ARGV); 844} 845 846/* 847 * Audit the environment strings passed to exec. 848 */ 849void 850audit_arg_envv(char *envv, int envc, int length) 851{ 852 struct kaudit_record *ar; 853 854 if (audit_arge == 0) 855 return; 856 857 ar = currecord(); 858 if (ar == NULL) 859 return; 860 861 ar->k_ar.ar_arg_envv = malloc(length, M_AUDITTEXT, M_WAITOK); 862 bcopy(envv, ar->k_ar.ar_arg_envv, length); 863 ar->k_ar.ar_arg_envc = envc; 864 ARG_SET_VALID(ar, ARG_ENVV); 865} 866 867/* 868 * The close() system call uses it's own audit call to capture the path/vnode 869 * information because those pieces are not easily obtained within the system 870 * call itself. 871 */ 872void 873audit_sysclose(struct thread *td, int fd) 874{ 875 struct kaudit_record *ar; 876 struct vnode *vp; 877 struct file *fp; 878 int vfslocked; 879 880 KASSERT(td != NULL, ("audit_sysclose: td == NULL")); 881 882 ar = currecord(); 883 if (ar == NULL) 884 return; 885 886 audit_arg_fd(fd); 887 888 if (getvnode(td->td_proc->p_fd, fd, &fp) != 0) 889 return; 890 891 vp = fp->f_vnode; 892 vfslocked = VFS_LOCK_GIANT(vp->v_mount); 893 vn_lock(vp, LK_SHARED | LK_RETRY); 894 audit_arg_vnode1(vp); 895 VOP_UNLOCK(vp, 0); 896 VFS_UNLOCK_GIANT(vfslocked); 897 fdrop(fp, td); 898} 899