xref: /freebsd/sys/security/audit/audit_arg.c (revision 7cd2dcf07629713e5a3d60472cfe4701b705a167) 
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 
655 	ar = currecord();
656 	if (ar == NULL)
657 		return;
658 
659 	switch (fp->f_type) {
660 	case DTYPE_VNODE:
661 	case DTYPE_FIFO:
662 		/*
663 		 * XXXAUDIT: Only possibly to record as first vnode?
664 		 */
665 		vp = fp->f_vnode;
666 		vn_lock(vp, LK_SHARED | LK_RETRY);
667 		audit_arg_vnode1(vp);
668 		VOP_UNLOCK(vp, 0);
669 		break;
670 
671 	case DTYPE_SOCKET:
672 		so = (struct socket *)fp->f_data;
673 		if (INP_CHECK_SOCKAF(so, PF_INET)) {
674 			SOCK_LOCK(so);
675 			ar->k_ar.ar_arg_sockinfo.so_type =
676 			    so->so_type;
677 			ar->k_ar.ar_arg_sockinfo.so_domain =
678 			    INP_SOCKAF(so);
679 			ar->k_ar.ar_arg_sockinfo.so_protocol =
680 			    so->so_proto->pr_protocol;
681 			SOCK_UNLOCK(so);
682 			pcb = (struct inpcb *)so->so_pcb;
683 			INP_RLOCK(pcb);
684 			ar->k_ar.ar_arg_sockinfo.so_raddr =
685 			    pcb->inp_faddr.s_addr;
686 			ar->k_ar.ar_arg_sockinfo.so_laddr =
687 			    pcb->inp_laddr.s_addr;
688 			ar->k_ar.ar_arg_sockinfo.so_rport =
689 			    pcb->inp_fport;
690 			ar->k_ar.ar_arg_sockinfo.so_lport =
691 			    pcb->inp_lport;
692 			INP_RUNLOCK(pcb);
693 			ARG_SET_VALID(ar, ARG_SOCKINFO);
694 		}
695 		break;
696 
697 	default:
698 		/* XXXAUDIT: else? */
699 		break;
700 	}
701 }
702 
703 /*
704  * Store a path as given by the user process for auditing into the audit
705  * record stored on the user thread.  This function will allocate the memory
706  * to store the path info if not already available.  This memory will be
707  * freed when the audit record is freed.
708  */
709 static void
710 audit_arg_upath(struct thread *td, char *upath, char **pathp)
711 {
712 
713 	if (*pathp == NULL)
714 		*pathp = malloc(MAXPATHLEN, M_AUDITPATH, M_WAITOK);
715 	audit_canon_path(td, upath, *pathp);
716 }
717 
718 void
719 audit_arg_upath1(struct thread *td, char *upath)
720 {
721 	struct kaudit_record *ar;
722 
723 	ar = currecord();
724 	if (ar == NULL)
725 		return;
726 
727 	audit_arg_upath(td, upath, &ar->k_ar.ar_arg_upath1);
728 	ARG_SET_VALID(ar, ARG_UPATH1);
729 }
730 
731 void
732 audit_arg_upath2(struct thread *td, char *upath)
733 {
734 	struct kaudit_record *ar;
735 
736 	ar = currecord();
737 	if (ar == NULL)
738 		return;
739 
740 	audit_arg_upath(td, upath, &ar->k_ar.ar_arg_upath2);
741 	ARG_SET_VALID(ar, ARG_UPATH2);
742 }
743 
744 /*
745  * Function to save the path and vnode attr information into the audit
746  * record.
747  *
748  * It is assumed that the caller will hold any vnode locks necessary to
749  * perform a VOP_GETATTR() on the passed vnode.
750  *
751  * XXX: The attr code is very similar to vfs_vnops.c:vn_stat(), but always
752  * provides access to the generation number as we need that to construct the
753  * BSM file ID.
754  *
755  * XXX: We should accept the process argument from the caller, since it's
756  * very likely they already have a reference.
757  *
758  * XXX: Error handling in this function is poor.
759  *
760  * XXXAUDIT: Possibly KASSERT the path pointer is NULL?
761  */
762 static int
763 audit_arg_vnode(struct vnode *vp, struct vnode_au_info *vnp)
764 {
765 	struct vattr vattr;
766 	int error;
767 
768 	ASSERT_VOP_LOCKED(vp, "audit_arg_vnode");
769 
770 	error = VOP_GETATTR(vp, &vattr, curthread->td_ucred);
771 	if (error) {
772 		/* XXX: How to handle this case? */
773 		return (error);
774 	}
775 
776 	vnp->vn_mode = vattr.va_mode;
777 	vnp->vn_uid = vattr.va_uid;
778 	vnp->vn_gid = vattr.va_gid;
779 	vnp->vn_dev = vattr.va_rdev;
780 	vnp->vn_fsid = vattr.va_fsid;
781 	vnp->vn_fileid = vattr.va_fileid;
782 	vnp->vn_gen = vattr.va_gen;
783 	return (0);
784 }
785 
786 void
787 audit_arg_vnode1(struct vnode *vp)
788 {
789 	struct kaudit_record *ar;
790 	int error;
791 
792 	ar = currecord();
793 	if (ar == NULL)
794 		return;
795 
796 	ARG_CLEAR_VALID(ar, ARG_VNODE1);
797 	error = audit_arg_vnode(vp, &ar->k_ar.ar_arg_vnode1);
798 	if (error == 0)
799 		ARG_SET_VALID(ar, ARG_VNODE1);
800 }
801 
802 void
803 audit_arg_vnode2(struct vnode *vp)
804 {
805 	struct kaudit_record *ar;
806 	int error;
807 
808 	ar = currecord();
809 	if (ar == NULL)
810 		return;
811 
812 	ARG_CLEAR_VALID(ar, ARG_VNODE2);
813 	error = audit_arg_vnode(vp, &ar->k_ar.ar_arg_vnode2);
814 	if (error == 0)
815 		ARG_SET_VALID(ar, ARG_VNODE2);
816 }
817 
818 /*
819  * Audit the argument strings passed to exec.
820  */
821 void
822 audit_arg_argv(char *argv, int argc, int length)
823 {
824 	struct kaudit_record *ar;
825 
826 	if (audit_argv == 0)
827 		return;
828 
829 	ar = currecord();
830 	if (ar == NULL)
831 		return;
832 
833 	ar->k_ar.ar_arg_argv = malloc(length, M_AUDITTEXT, M_WAITOK);
834 	bcopy(argv, ar->k_ar.ar_arg_argv, length);
835 	ar->k_ar.ar_arg_argc = argc;
836 	ARG_SET_VALID(ar, ARG_ARGV);
837 }
838 
839 /*
840  * Audit the environment strings passed to exec.
841  */
842 void
843 audit_arg_envv(char *envv, int envc, int length)
844 {
845 	struct kaudit_record *ar;
846 
847 	if (audit_arge == 0)
848 		return;
849 
850 	ar = currecord();
851 	if (ar == NULL)
852 		return;
853 
854 	ar->k_ar.ar_arg_envv = malloc(length, M_AUDITTEXT, M_WAITOK);
855 	bcopy(envv, ar->k_ar.ar_arg_envv, length);
856 	ar->k_ar.ar_arg_envc = envc;
857 	ARG_SET_VALID(ar, ARG_ENVV);
858 }
859 
860 void
861 audit_arg_rights(cap_rights_t rights)
862 {
863 	struct kaudit_record *ar;
864 
865 	ar = currecord();
866 	if (ar == NULL)
867 		return;
868 
869 	ar->k_ar.ar_arg_rights = rights;
870 	ARG_SET_VALID(ar, ARG_RIGHTS);
871 }
872 
873 /*
874  * The close() system call uses it's own audit call to capture the path/vnode
875  * information because those pieces are not easily obtained within the system
876  * call itself.
877  */
878 void
879 audit_sysclose(struct thread *td, int fd)
880 {
881 	struct kaudit_record *ar;
882 	struct vnode *vp;
883 	struct file *fp;
884 
885 	KASSERT(td != NULL, ("audit_sysclose: td == NULL"));
886 
887 	ar = currecord();
888 	if (ar == NULL)
889 		return;
890 
891 	audit_arg_fd(fd);
892 
893 	if (getvnode(td->td_proc->p_fd, fd, 0, &fp) != 0)
894 		return;
895 
896 	vp = fp->f_vnode;
897 	vn_lock(vp, LK_SHARED | LK_RETRY);
898 	audit_arg_vnode1(vp);
899 	VOP_UNLOCK(vp, 0);
900 	fdrop(fp, td);
901 }
902