xref: /freebsd/sys/security/audit/audit_arg.c (revision 325151a3) 
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/capsicum.h>
36 #include <sys/ipc.h>
37 #include <sys/mount.h>
38 #include <sys/proc.h>
39 #include <sys/socket.h>
40 #include <sys/socketvar.h>
41 #include <sys/protosw.h>
42 #include <sys/domain.h>
43 #include <sys/sbuf.h>
44 #include <sys/systm.h>
45 #include <sys/un.h>
46 #include <sys/vnode.h>
47 
48 #include <netinet/in.h>
49 #include <netinet/in_pcb.h>
50 
51 #include <security/audit/audit.h>
52 #include <security/audit/audit_private.h>
53 
54 /*
55  * Calls to manipulate elements of the audit record structure from system
56  * call code.  Macro wrappers will prevent this functions from being entered
57  * if auditing is disabled, avoiding the function call cost.  We check the
58  * thread audit record pointer anyway, as the audit condition could change,
59  * and pre-selection may not have allocated an audit record for this event.
60  *
61  * XXXAUDIT: Should we assert, in each case, that this field of the record
62  * hasn't already been filled in?
63  */
64 void
65 audit_arg_addr(void *addr)
66 {
67 	struct kaudit_record *ar;
68 
69 	ar = currecord();
70 	if (ar == NULL)
71 		return;
72 
73 	ar->k_ar.ar_arg_addr = addr;
74 	ARG_SET_VALID(ar, ARG_ADDR);
75 }
76 
77 void
78 audit_arg_exit(int status, int retval)
79 {
80 	struct kaudit_record *ar;
81 
82 	ar = currecord();
83 	if (ar == NULL)
84 		return;
85 
86 	ar->k_ar.ar_arg_exitstatus = status;
87 	ar->k_ar.ar_arg_exitretval = retval;
88 	ARG_SET_VALID(ar, ARG_EXIT);
89 }
90 
91 void
92 audit_arg_len(int len)
93 {
94 	struct kaudit_record *ar;
95 
96 	ar = currecord();
97 	if (ar == NULL)
98 		return;
99 
100 	ar->k_ar.ar_arg_len = len;
101 	ARG_SET_VALID(ar, ARG_LEN);
102 }
103 
104 void
105 audit_arg_atfd1(int atfd)
106 {
107 	struct kaudit_record *ar;
108 
109 	ar = currecord();
110 	if (ar == NULL)
111 		return;
112 
113 	ar->k_ar.ar_arg_atfd1 = atfd;
114 	ARG_SET_VALID(ar, ARG_ATFD1);
115 }
116 
117 void
118 audit_arg_atfd2(int atfd)
119 {
120 	struct kaudit_record *ar;
121 
122 	ar = currecord();
123 	if (ar == NULL)
124 		return;
125 
126 	ar->k_ar.ar_arg_atfd2 = atfd;
127 	ARG_SET_VALID(ar, ARG_ATFD2);
128 }
129 
130 void
131 audit_arg_fd(int fd)
132 {
133 	struct kaudit_record *ar;
134 
135 	ar = currecord();
136 	if (ar == NULL)
137 		return;
138 
139 	ar->k_ar.ar_arg_fd = fd;
140 	ARG_SET_VALID(ar, ARG_FD);
141 }
142 
143 void
144 audit_arg_fflags(int fflags)
145 {
146 	struct kaudit_record *ar;
147 
148 	ar = currecord();
149 	if (ar == NULL)
150 		return;
151 
152 	ar->k_ar.ar_arg_fflags = fflags;
153 	ARG_SET_VALID(ar, ARG_FFLAGS);
154 }
155 
156 void
157 audit_arg_gid(gid_t gid)
158 {
159 	struct kaudit_record *ar;
160 
161 	ar = currecord();
162 	if (ar == NULL)
163 		return;
164 
165 	ar->k_ar.ar_arg_gid = gid;
166 	ARG_SET_VALID(ar, ARG_GID);
167 }
168 
169 void
170 audit_arg_uid(uid_t uid)
171 {
172 	struct kaudit_record *ar;
173 
174 	ar = currecord();
175 	if (ar == NULL)
176 		return;
177 
178 	ar->k_ar.ar_arg_uid = uid;
179 	ARG_SET_VALID(ar, ARG_UID);
180 }
181 
182 void
183 audit_arg_egid(gid_t egid)
184 {
185 	struct kaudit_record *ar;
186 
187 	ar = currecord();
188 	if (ar == NULL)
189 		return;
190 
191 	ar->k_ar.ar_arg_egid = egid;
192 	ARG_SET_VALID(ar, ARG_EGID);
193 }
194 
195 void
196 audit_arg_euid(uid_t euid)
197 {
198 	struct kaudit_record *ar;
199 
200 	ar = currecord();
201 	if (ar == NULL)
202 		return;
203 
204 	ar->k_ar.ar_arg_euid = euid;
205 	ARG_SET_VALID(ar, ARG_EUID);
206 }
207 
208 void
209 audit_arg_rgid(gid_t rgid)
210 {
211 	struct kaudit_record *ar;
212 
213 	ar = currecord();
214 	if (ar == NULL)
215 		return;
216 
217 	ar->k_ar.ar_arg_rgid = rgid;
218 	ARG_SET_VALID(ar, ARG_RGID);
219 }
220 
221 void
222 audit_arg_ruid(uid_t ruid)
223 {
224 	struct kaudit_record *ar;
225 
226 	ar = currecord();
227 	if (ar == NULL)
228 		return;
229 
230 	ar->k_ar.ar_arg_ruid = ruid;
231 	ARG_SET_VALID(ar, ARG_RUID);
232 }
233 
234 void
235 audit_arg_sgid(gid_t sgid)
236 {
237 	struct kaudit_record *ar;
238 
239 	ar = currecord();
240 	if (ar == NULL)
241 		return;
242 
243 	ar->k_ar.ar_arg_sgid = sgid;
244 	ARG_SET_VALID(ar, ARG_SGID);
245 }
246 
247 void
248 audit_arg_suid(uid_t suid)
249 {
250 	struct kaudit_record *ar;
251 
252 	ar = currecord();
253 	if (ar == NULL)
254 		return;
255 
256 	ar->k_ar.ar_arg_suid = suid;
257 	ARG_SET_VALID(ar, ARG_SUID);
258 }
259 
260 void
261 audit_arg_groupset(gid_t *gidset, u_int gidset_size)
262 {
263 	u_int i;
264 	struct kaudit_record *ar;
265 
266 	KASSERT(gidset_size <= ngroups_max + 1,
267 	    ("audit_arg_groupset: gidset_size > (kern.ngroups + 1)"));
268 
269 	ar = currecord();
270 	if (ar == NULL)
271 		return;
272 
273 	if (ar->k_ar.ar_arg_groups.gidset == NULL)
274 		ar->k_ar.ar_arg_groups.gidset = malloc(
275 		    sizeof(gid_t) * gidset_size, M_AUDITGIDSET, M_WAITOK);
276 
277 	for (i = 0; i < gidset_size; i++)
278 		ar->k_ar.ar_arg_groups.gidset[i] = gidset[i];
279 	ar->k_ar.ar_arg_groups.gidset_size = gidset_size;
280 	ARG_SET_VALID(ar, ARG_GROUPSET);
281 }
282 
283 void
284 audit_arg_login(char *login)
285 {
286 	struct kaudit_record *ar;
287 
288 	ar = currecord();
289 	if (ar == NULL)
290 		return;
291 
292 	strlcpy(ar->k_ar.ar_arg_login, login, MAXLOGNAME);
293 	ARG_SET_VALID(ar, ARG_LOGIN);
294 }
295 
296 void
297 audit_arg_ctlname(int *name, int namelen)
298 {
299 	struct kaudit_record *ar;
300 
301 	ar = currecord();
302 	if (ar == NULL)
303 		return;
304 
305 	bcopy(name, &ar->k_ar.ar_arg_ctlname, namelen * sizeof(int));
306 	ar->k_ar.ar_arg_len = namelen;
307 	ARG_SET_VALID(ar, ARG_CTLNAME | ARG_LEN);
308 }
309 
310 void
311 audit_arg_mask(int mask)
312 {
313 	struct kaudit_record *ar;
314 
315 	ar = currecord();
316 	if (ar == NULL)
317 		return;
318 
319 	ar->k_ar.ar_arg_mask = mask;
320 	ARG_SET_VALID(ar, ARG_MASK);
321 }
322 
323 void
324 audit_arg_mode(mode_t mode)
325 {
326 	struct kaudit_record *ar;
327 
328 	ar = currecord();
329 	if (ar == NULL)
330 		return;
331 
332 	ar->k_ar.ar_arg_mode = mode;
333 	ARG_SET_VALID(ar, ARG_MODE);
334 }
335 
336 void
337 audit_arg_dev(int dev)
338 {
339 	struct kaudit_record *ar;
340 
341 	ar = currecord();
342 	if (ar == NULL)
343 		return;
344 
345 	ar->k_ar.ar_arg_dev = dev;
346 	ARG_SET_VALID(ar, ARG_DEV);
347 }
348 
349 void
350 audit_arg_value(long value)
351 {
352 	struct kaudit_record *ar;
353 
354 	ar = currecord();
355 	if (ar == NULL)
356 		return;
357 
358 	ar->k_ar.ar_arg_value = value;
359 	ARG_SET_VALID(ar, ARG_VALUE);
360 }
361 
362 void
363 audit_arg_owner(uid_t uid, gid_t gid)
364 {
365 	struct kaudit_record *ar;
366 
367 	ar = currecord();
368 	if (ar == NULL)
369 		return;
370 
371 	ar->k_ar.ar_arg_uid = uid;
372 	ar->k_ar.ar_arg_gid = gid;
373 	ARG_SET_VALID(ar, ARG_UID | ARG_GID);
374 }
375 
376 void
377 audit_arg_pid(pid_t pid)
378 {
379 	struct kaudit_record *ar;
380 
381 	ar = currecord();
382 	if (ar == NULL)
383 		return;
384 
385 	ar->k_ar.ar_arg_pid = pid;
386 	ARG_SET_VALID(ar, ARG_PID);
387 }
388 
389 void
390 audit_arg_process(struct proc *p)
391 {
392 	struct kaudit_record *ar;
393 	struct ucred *cred;
394 
395 	KASSERT(p != NULL, ("audit_arg_process: p == NULL"));
396 
397 	PROC_LOCK_ASSERT(p, MA_OWNED);
398 
399 	ar = currecord();
400 	if (ar == NULL)
401 		return;
402 
403 	cred = p->p_ucred;
404 	ar->k_ar.ar_arg_auid = cred->cr_audit.ai_auid;
405 	ar->k_ar.ar_arg_euid = cred->cr_uid;
406 	ar->k_ar.ar_arg_egid = cred->cr_groups[0];
407 	ar->k_ar.ar_arg_ruid = cred->cr_ruid;
408 	ar->k_ar.ar_arg_rgid = cred->cr_rgid;
409 	ar->k_ar.ar_arg_asid = cred->cr_audit.ai_asid;
410 	ar->k_ar.ar_arg_termid_addr = cred->cr_audit.ai_termid;
411 	ar->k_ar.ar_arg_pid = p->p_pid;
412 	ARG_SET_VALID(ar, ARG_AUID | ARG_EUID | ARG_EGID | ARG_RUID |
413 	    ARG_RGID | ARG_ASID | ARG_TERMID_ADDR | ARG_PID | ARG_PROCESS);
414 }
415 
416 void
417 audit_arg_signum(u_int signum)
418 {
419 	struct kaudit_record *ar;
420 
421 	ar = currecord();
422 	if (ar == NULL)
423 		return;
424 
425 	ar->k_ar.ar_arg_signum = signum;
426 	ARG_SET_VALID(ar, ARG_SIGNUM);
427 }
428 
429 void
430 audit_arg_socket(int sodomain, int sotype, int soprotocol)
431 {
432 	struct kaudit_record *ar;
433 
434 	ar = currecord();
435 	if (ar == NULL)
436 		return;
437 
438 	ar->k_ar.ar_arg_sockinfo.so_domain = sodomain;
439 	ar->k_ar.ar_arg_sockinfo.so_type = sotype;
440 	ar->k_ar.ar_arg_sockinfo.so_protocol = soprotocol;
441 	ARG_SET_VALID(ar, ARG_SOCKINFO);
442 }
443 
444 void
445 audit_arg_sockaddr(struct thread *td, int dirfd, struct sockaddr *sa)
446 {
447 	struct kaudit_record *ar;
448 
449 	KASSERT(td != NULL, ("audit_arg_sockaddr: td == NULL"));
450 	KASSERT(sa != NULL, ("audit_arg_sockaddr: sa == NULL"));
451 
452 	ar = currecord();
453 	if (ar == NULL)
454 		return;
455 
456 	bcopy(sa, &ar->k_ar.ar_arg_sockaddr, sa->sa_len);
457 	switch (sa->sa_family) {
458 	case AF_INET:
459 		ARG_SET_VALID(ar, ARG_SADDRINET);
460 		break;
461 
462 	case AF_INET6:
463 		ARG_SET_VALID(ar, ARG_SADDRINET6);
464 		break;
465 
466 	case AF_UNIX:
467 		if (dirfd != AT_FDCWD)
468 			audit_arg_atfd1(dirfd);
469 		audit_arg_upath1(td, dirfd,
470 		    ((struct sockaddr_un *)sa)->sun_path);
471 		ARG_SET_VALID(ar, ARG_SADDRUNIX);
472 		break;
473 	/* XXXAUDIT: default:? */
474 	}
475 }
476 
477 void
478 audit_arg_auid(uid_t auid)
479 {
480 	struct kaudit_record *ar;
481 
482 	ar = currecord();
483 	if (ar == NULL)
484 		return;
485 
486 	ar->k_ar.ar_arg_auid = auid;
487 	ARG_SET_VALID(ar, ARG_AUID);
488 }
489 
490 void
491 audit_arg_auditinfo(struct auditinfo *au_info)
492 {
493 	struct kaudit_record *ar;
494 
495 	ar = currecord();
496 	if (ar == NULL)
497 		return;
498 
499 	ar->k_ar.ar_arg_auid = au_info->ai_auid;
500 	ar->k_ar.ar_arg_asid = au_info->ai_asid;
501 	ar->k_ar.ar_arg_amask.am_success = au_info->ai_mask.am_success;
502 	ar->k_ar.ar_arg_amask.am_failure = au_info->ai_mask.am_failure;
503 	ar->k_ar.ar_arg_termid.port = au_info->ai_termid.port;
504 	ar->k_ar.ar_arg_termid.machine = au_info->ai_termid.machine;
505 	ARG_SET_VALID(ar, ARG_AUID | ARG_ASID | ARG_AMASK | ARG_TERMID);
506 }
507 
508 void
509 audit_arg_auditinfo_addr(struct auditinfo_addr *au_info)
510 {
511 	struct kaudit_record *ar;
512 
513 	ar = currecord();
514 	if (ar == NULL)
515 		return;
516 
517 	ar->k_ar.ar_arg_auid = au_info->ai_auid;
518 	ar->k_ar.ar_arg_asid = au_info->ai_asid;
519 	ar->k_ar.ar_arg_amask.am_success = au_info->ai_mask.am_success;
520 	ar->k_ar.ar_arg_amask.am_failure = au_info->ai_mask.am_failure;
521 	ar->k_ar.ar_arg_termid_addr.at_type = au_info->ai_termid.at_type;
522 	ar->k_ar.ar_arg_termid_addr.at_port = au_info->ai_termid.at_port;
523 	ar->k_ar.ar_arg_termid_addr.at_addr[0] = au_info->ai_termid.at_addr[0];
524 	ar->k_ar.ar_arg_termid_addr.at_addr[1] = au_info->ai_termid.at_addr[1];
525 	ar->k_ar.ar_arg_termid_addr.at_addr[2] = au_info->ai_termid.at_addr[2];
526 	ar->k_ar.ar_arg_termid_addr.at_addr[3] = au_info->ai_termid.at_addr[3];
527 	ARG_SET_VALID(ar, ARG_AUID | ARG_ASID | ARG_AMASK | ARG_TERMID_ADDR);
528 }
529 
530 void
531 audit_arg_text(char *text)
532 {
533 	struct kaudit_record *ar;
534 
535 	KASSERT(text != NULL, ("audit_arg_text: text == NULL"));
536 
537 	ar = currecord();
538 	if (ar == NULL)
539 		return;
540 
541 	/* Invalidate the text string */
542 	ar->k_ar.ar_valid_arg &= (ARG_ALL ^ ARG_TEXT);
543 
544 	if (ar->k_ar.ar_arg_text == NULL)
545 		ar->k_ar.ar_arg_text = malloc(MAXPATHLEN, M_AUDITTEXT,
546 		    M_WAITOK);
547 
548 	strncpy(ar->k_ar.ar_arg_text, text, MAXPATHLEN);
549 	ARG_SET_VALID(ar, ARG_TEXT);
550 }
551 
552 void
553 audit_arg_cmd(int cmd)
554 {
555 	struct kaudit_record *ar;
556 
557 	ar = currecord();
558 	if (ar == NULL)
559 		return;
560 
561 	ar->k_ar.ar_arg_cmd = cmd;
562 	ARG_SET_VALID(ar, ARG_CMD);
563 }
564 
565 void
566 audit_arg_svipc_cmd(int cmd)
567 {
568 	struct kaudit_record *ar;
569 
570 	ar = currecord();
571 	if (ar == NULL)
572 		return;
573 
574 	ar->k_ar.ar_arg_svipc_cmd = cmd;
575 	ARG_SET_VALID(ar, ARG_SVIPC_CMD);
576 }
577 
578 void
579 audit_arg_svipc_perm(struct ipc_perm *perm)
580 {
581 	struct kaudit_record *ar;
582 
583 	ar = currecord();
584 	if (ar == NULL)
585 		return;
586 
587 	bcopy(perm, &ar->k_ar.ar_arg_svipc_perm,
588 	    sizeof(ar->k_ar.ar_arg_svipc_perm));
589 	ARG_SET_VALID(ar, ARG_SVIPC_PERM);
590 }
591 
592 void
593 audit_arg_svipc_id(int id)
594 {
595 	struct kaudit_record *ar;
596 
597 	ar = currecord();
598 	if (ar == NULL)
599 		return;
600 
601 	ar->k_ar.ar_arg_svipc_id = id;
602 	ARG_SET_VALID(ar, ARG_SVIPC_ID);
603 }
604 
605 void
606 audit_arg_svipc_addr(void * addr)
607 {
608 	struct kaudit_record *ar;
609 
610 	ar = currecord();
611 	if (ar == NULL)
612 		return;
613 
614 	ar->k_ar.ar_arg_svipc_addr = addr;
615 	ARG_SET_VALID(ar, ARG_SVIPC_ADDR);
616 }
617 
618 void
619 audit_arg_posix_ipc_perm(uid_t uid, gid_t gid, mode_t mode)
620 {
621 	struct kaudit_record *ar;
622 
623 	ar = currecord();
624 	if (ar == NULL)
625 		return;
626 
627 	ar->k_ar.ar_arg_pipc_perm.pipc_uid = uid;
628 	ar->k_ar.ar_arg_pipc_perm.pipc_gid = gid;
629 	ar->k_ar.ar_arg_pipc_perm.pipc_mode = mode;
630 	ARG_SET_VALID(ar, ARG_POSIX_IPC_PERM);
631 }
632 
633 void
634 audit_arg_auditon(union auditon_udata *udata)
635 {
636 	struct kaudit_record *ar;
637 
638 	ar = currecord();
639 	if (ar == NULL)
640 		return;
641 
642 	bcopy((void *)udata, &ar->k_ar.ar_arg_auditon,
643 	    sizeof(ar->k_ar.ar_arg_auditon));
644 	ARG_SET_VALID(ar, ARG_AUDITON);
645 }
646 
647 /*
648  * Audit information about a file, either the file's vnode info, or its
649  * socket address info.
650  */
651 void
652 audit_arg_file(struct proc *p, struct file *fp)
653 {
654 	struct kaudit_record *ar;
655 	struct socket *so;
656 	struct inpcb *pcb;
657 	struct vnode *vp;
658 
659 	ar = currecord();
660 	if (ar == NULL)
661 		return;
662 
663 	switch (fp->f_type) {
664 	case DTYPE_VNODE:
665 	case DTYPE_FIFO:
666 		/*
667 		 * XXXAUDIT: Only possibly to record as first vnode?
668 		 */
669 		vp = fp->f_vnode;
670 		vn_lock(vp, LK_SHARED | LK_RETRY);
671 		audit_arg_vnode1(vp);
672 		VOP_UNLOCK(vp, 0);
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 static void
714 audit_arg_upath(struct thread *td, int dirfd, char *upath, char **pathp)
715 {
716 
717 	if (*pathp == NULL)
718 		*pathp = malloc(MAXPATHLEN, M_AUDITPATH, M_WAITOK);
719 	audit_canon_path(td, dirfd, upath, *pathp);
720 }
721 
722 void
723 audit_arg_upath1(struct thread *td, int dirfd, char *upath)
724 {
725 	struct kaudit_record *ar;
726 
727 	ar = currecord();
728 	if (ar == NULL)
729 		return;
730 
731 	audit_arg_upath(td, dirfd, upath, &ar->k_ar.ar_arg_upath1);
732 	ARG_SET_VALID(ar, ARG_UPATH1);
733 }
734 
735 void
736 audit_arg_upath2(struct thread *td, int dirfd, char *upath)
737 {
738 	struct kaudit_record *ar;
739 
740 	ar = currecord();
741 	if (ar == NULL)
742 		return;
743 
744 	audit_arg_upath(td, dirfd, upath, &ar->k_ar.ar_arg_upath2);
745 	ARG_SET_VALID(ar, ARG_UPATH2);
746 }
747 
748 /*
749  * Function to save the path and vnode attr information into the audit
750  * record.
751  *
752  * It is assumed that the caller will hold any vnode locks necessary to
753  * perform a VOP_GETATTR() on the passed vnode.
754  *
755  * XXX: The attr code is very similar to vfs_vnops.c:vn_stat(), but always
756  * provides access to the generation number as we need that to construct the
757  * BSM file ID.
758  *
759  * XXX: We should accept the process argument from the caller, since it's
760  * very likely they already have a reference.
761  *
762  * XXX: Error handling in this function is poor.
763  *
764  * XXXAUDIT: Possibly KASSERT the path pointer is NULL?
765  */
766 static int
767 audit_arg_vnode(struct vnode *vp, struct vnode_au_info *vnp)
768 {
769 	struct vattr vattr;
770 	int error;
771 
772 	ASSERT_VOP_LOCKED(vp, "audit_arg_vnode");
773 
774 	error = VOP_GETATTR(vp, &vattr, curthread->td_ucred);
775 	if (error) {
776 		/* XXX: How to handle this case? */
777 		return (error);
778 	}
779 
780 	vnp->vn_mode = vattr.va_mode;
781 	vnp->vn_uid = vattr.va_uid;
782 	vnp->vn_gid = vattr.va_gid;
783 	vnp->vn_dev = vattr.va_rdev;
784 	vnp->vn_fsid = vattr.va_fsid;
785 	vnp->vn_fileid = vattr.va_fileid;
786 	vnp->vn_gen = vattr.va_gen;
787 	return (0);
788 }
789 
790 void
791 audit_arg_vnode1(struct vnode *vp)
792 {
793 	struct kaudit_record *ar;
794 	int error;
795 
796 	ar = currecord();
797 	if (ar == NULL)
798 		return;
799 
800 	ARG_CLEAR_VALID(ar, ARG_VNODE1);
801 	error = audit_arg_vnode(vp, &ar->k_ar.ar_arg_vnode1);
802 	if (error == 0)
803 		ARG_SET_VALID(ar, ARG_VNODE1);
804 }
805 
806 void
807 audit_arg_vnode2(struct vnode *vp)
808 {
809 	struct kaudit_record *ar;
810 	int error;
811 
812 	ar = currecord();
813 	if (ar == NULL)
814 		return;
815 
816 	ARG_CLEAR_VALID(ar, ARG_VNODE2);
817 	error = audit_arg_vnode(vp, &ar->k_ar.ar_arg_vnode2);
818 	if (error == 0)
819 		ARG_SET_VALID(ar, ARG_VNODE2);
820 }
821 
822 /*
823  * Audit the argument strings passed to exec.
824  */
825 void
826 audit_arg_argv(char *argv, int argc, int length)
827 {
828 	struct kaudit_record *ar;
829 
830 	if (audit_argv == 0)
831 		return;
832 
833 	ar = currecord();
834 	if (ar == NULL)
835 		return;
836 
837 	ar->k_ar.ar_arg_argv = malloc(length, M_AUDITTEXT, M_WAITOK);
838 	bcopy(argv, ar->k_ar.ar_arg_argv, length);
839 	ar->k_ar.ar_arg_argc = argc;
840 	ARG_SET_VALID(ar, ARG_ARGV);
841 }
842 
843 /*
844  * Audit the environment strings passed to exec.
845  */
846 void
847 audit_arg_envv(char *envv, int envc, int length)
848 {
849 	struct kaudit_record *ar;
850 
851 	if (audit_arge == 0)
852 		return;
853 
854 	ar = currecord();
855 	if (ar == NULL)
856 		return;
857 
858 	ar->k_ar.ar_arg_envv = malloc(length, M_AUDITTEXT, M_WAITOK);
859 	bcopy(envv, ar->k_ar.ar_arg_envv, length);
860 	ar->k_ar.ar_arg_envc = envc;
861 	ARG_SET_VALID(ar, ARG_ENVV);
862 }
863 
864 void
865 audit_arg_rights(cap_rights_t *rightsp)
866 {
867 	struct kaudit_record *ar;
868 
869 	ar = currecord();
870 	if (ar == NULL)
871 		return;
872 
873 	ar->k_ar.ar_arg_rights = *rightsp;
874 	ARG_SET_VALID(ar, ARG_RIGHTS);
875 }
876 
877 void
878 audit_arg_fcntl_rights(uint32_t fcntlrights)
879 {
880 	struct kaudit_record *ar;
881 
882 	ar = currecord();
883 	if (ar == NULL)
884 		return;
885 
886 	ar->k_ar.ar_arg_fcntl_rights = fcntlrights;
887 	ARG_SET_VALID(ar, ARG_FCNTL_RIGHTS);
888 }
889 
890 /*
891  * The close() system call uses it's own audit call to capture the path/vnode
892  * information because those pieces are not easily obtained within the system
893  * call itself.
894  */
895 void
896 audit_sysclose(struct thread *td, int fd)
897 {
898 	cap_rights_t rights;
899 	struct kaudit_record *ar;
900 	struct vnode *vp;
901 	struct file *fp;
902 
903 	KASSERT(td != NULL, ("audit_sysclose: td == NULL"));
904 
905 	ar = currecord();
906 	if (ar == NULL)
907 		return;
908 
909 	audit_arg_fd(fd);
910 
911 	if (getvnode(td, fd, cap_rights_init(&rights), &fp) != 0)
912 		return;
913 
914 	vp = fp->f_vnode;
915 	vn_lock(vp, LK_SHARED | LK_RETRY);
916 	audit_arg_vnode1(vp);
917 	VOP_UNLOCK(vp, 0);
918 	fdrop(fp, td);
919 }
920