audit_arg.c revision 160086
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: head/sys/security/audit/audit_arg.c 160086 2006-07-03 14:55:55Z rwatson $ 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 */ 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 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_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 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, 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 440void 441audit_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 453void 454audit_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 471void 472audit_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 493void 494audit_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 506void 507audit_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 519void 520audit_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 533void 534audit_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 546void 547audit_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 559void 560audit_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 574void 575audit_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 */ 592void 593audit_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 */ 660void 661audit_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 */ 710void 711audit_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 * The close() system call uses it's own audit call to capture the path/vnode 767 * information because those pieces are not easily obtained within the system 768 * call itself. 769 */ 770void 771audit_sysclose(struct thread *td, int fd) 772{ 773 struct kaudit_record *ar; 774 struct vnode *vp; 775 struct file *fp; 776 int vfslocked; 777 778 KASSERT(td != NULL, ("audit_sysclose: td == NULL")); 779 780 ar = currecord(); 781 if (ar == NULL) 782 return; 783 784 audit_arg_fd(fd); 785 786 if (getvnode(td->td_proc->p_fd, fd, &fp) != 0) 787 return; 788 789 vp = fp->f_vnode; 790 vfslocked = VFS_LOCK_GIANT(vp->v_mount); 791 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td); 792 audit_arg_vnode(vp, ARG_VNODE1); 793 VOP_UNLOCK(vp, 0, td); 794 VFS_UNLOCK_GIANT(vfslocked); 795 fdrop(fp, td); 796} 797