[apple/xnu.git] / security / mac_audit.c

/*
 * Copyright (c) 2006-2007 Apple Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 * 
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */
/*
 * Copyright (c) 1999, 2000, 2001, 2002 Robert N. M. Watson
 * Copyright (c) 2001 Ilmar S. Habibulin
 * Copyright (c) 2001, 2002, 2003, 2004 Networks Associates Technology, Inc.
 *
 * This software was developed by Robert Watson and Ilmar Habibulin for the
 * TrustedBSD Project.
 *
 * This software was developed for the FreeBSD Project in part by Network
 * Associates Laboratories, the Security Research Division of Network
 * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"),
 * as part of the DARPA CHATS research program.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 */
#include <sys/param.h>
#include <sys/types.h>  
#include <sys/vnode.h>  
#include <sys/vnode_internal.h>
#include <sys/kauth.h>
#include <sys/queue.h>  
#include <security/mac_internal.h>
#include <bsd/bsm/audit.h>
#include <bsd/security/audit/audit.h>
#include <bsd/sys/malloc.h>
#include <vm/vm_kern.h>
#include <kern/kalloc.h>
#include <kern/zalloc.h>


int mac_audit(__unused int len, __unused u_char *data);


#if CONFIG_AUDIT

/* The zone allocator is initialized in mac_base.c. */
zone_t mac_audit_data_zone;

int
mac_system_check_audit(struct ucred *cred, void *record, int length)
{
	int error;

	MAC_CHECK(system_check_audit, cred, record, length);

	return (error);
}

int
mac_system_check_auditon(struct ucred *cred, int cmd)
{
	int error;

	MAC_CHECK(system_check_auditon, cred, cmd);

	return (error);
}

int
mac_system_check_auditctl(struct ucred *cred, struct vnode *vp)
{
	int error;
	struct label *vl = vp ? vp->v_label : NULL;

	MAC_CHECK(system_check_auditctl, cred, vp, vl);

	return (error);
}

int
mac_proc_check_getauid(struct proc *curp)
{
	kauth_cred_t cred;
	int error;

	if (!mac_proc_enforce ||
	    !mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
		return 0;

	cred = kauth_cred_proc_ref(curp);
	MAC_CHECK(proc_check_getauid, cred);
	kauth_cred_unref(&cred);

	return (error);
}

int
mac_proc_check_setauid(struct proc *curp, uid_t auid)
{
	kauth_cred_t cred;
	int error;

	if (!mac_proc_enforce ||
	    !mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
		return 0;

	cred = kauth_cred_proc_ref(curp);
	MAC_CHECK(proc_check_setauid, cred, auid);
	kauth_cred_unref(&cred);

	return (error);
}

int 
mac_proc_check_getaudit(struct proc *curp) 
{
	kauth_cred_t cred;
	int error;

	if (!mac_proc_enforce ||
	    !mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
		return 0;

	cred = kauth_cred_proc_ref(curp);
	MAC_CHECK(proc_check_getaudit, cred);
	kauth_cred_unref(&cred);

	return (error);
}

int
mac_proc_check_setaudit(struct proc *curp, struct auditinfo_addr *ai)
{
	kauth_cred_t cred;
	int error;

	if (!mac_proc_enforce ||
	    !mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
		return 0;

	cred = kauth_cred_proc_ref(curp);
	MAC_CHECK(proc_check_setaudit, cred, ai);
	kauth_cred_unref(&cred);

	return (error);
}

#if 0
/*
 * This is the framework entry point for MAC policies to use to add
 * arbitrary data to the current audit record.
 * (Currently not supported, as no existing audit viewers would 
 * display this format)
 * 
 */
int
mac_audit_data(int len, u_char *data, mac_policy_handle_t handle)
{
	char *sanitized;

	if ((len <= 0) || (len > MAC_AUDIT_DATA_LIMIT))
		return (EINVAL);

	sanitized = (char *)zalloc(mac_audit_data_zone);

	bcopy(data, sanitized, len);
	return (audit_mac_data(MAC_AUDIT_DATA_TYPE, len, sanitized));
}
#endif

/*
 * This is the entry point a MAC policy will call to add NULL-
 * terminated ASCII text to the current audit record.
 */
int
mac_audit_text(char *text, mac_policy_handle_t handle)
{
	char *sanitized;
	const char *name;
	int i, size, plen, len;

	name = mac_get_mpc(handle)->mpc_name;
	len = strlen(text);
	plen = 2 + strlen(name);
	if (plen + len >= MAC_AUDIT_DATA_LIMIT)
		return (EINVAL);

	/*
	 * Make sure the text is only composed of only ASCII printable
	 * characters.
	 */
	for (i=0; i < len; i++)
		if (text[i] < (char) 32 || text[i] > (char) 126)
			return (EINVAL);

	size = len + plen + 1;
 	sanitized = (char *)zalloc(mac_audit_data_zone);

	strlcpy(sanitized, name, MAC_AUDIT_DATA_LIMIT);
	strncat(sanitized, ": ", MAC_AUDIT_DATA_LIMIT - plen + 2);
	strncat(sanitized, text, MAC_AUDIT_DATA_LIMIT - plen);

	return (audit_mac_data(MAC_AUDIT_TEXT_TYPE, size, (u_char *)sanitized));
}

int
mac_audit_check_preselect(struct ucred *cred, unsigned short syscode, void *args)
{
	struct mac_policy_conf *mpc;
	int ret, error;
	u_int i;

	ret = MAC_AUDIT_DEFAULT;
	for (i = 0; i < mac_policy_list.staticmax; i++) {
		mpc = mac_policy_list.entries[i].mpc;
		if (mpc == NULL)
			continue;

		if (mpc->mpc_ops->mpo_audit_check_preselect != NULL) {
			error = mpc->mpc_ops->mpo_audit_check_preselect(cred,
			    syscode, args);
			ret = (ret > error ? ret : error);
		}
	}
	if (mac_policy_list_conditional_busy() != 0) {
		for (; i <= mac_policy_list.maxindex; i++) {
			mpc = mac_policy_list.entries[i].mpc;
			if (mpc == NULL)
				continue;

			if (mpc->mpc_ops->mpo_audit_check_preselect != NULL) {
				error = mpc->mpc_ops->mpo_audit_check_preselect(cred,
				    syscode, args);
				ret = (ret > error ? ret : error);
			}
		}
		mac_policy_list_unbusy();
	}

	return (ret);
}

int
mac_audit_check_postselect(struct ucred *cred, unsigned short syscode,
    void *args, int error, int retval, int mac_forced)
{
	struct mac_policy_conf *mpc;
	int ret, mac_error;
	u_int i;

	/*
	 * If the audit was forced by a MAC policy by mac_audit_check_preselect(),
	 * echo that.
	 */
	if (mac_forced)
		return (MAC_AUDIT_YES);

	ret = MAC_AUDIT_DEFAULT;
	for (i = 0; i < mac_policy_list.staticmax; i++) {
		mpc = mac_policy_list.entries[i].mpc;
		if (mpc == NULL)
			continue;

		if (mpc->mpc_ops->mpo_audit_check_postselect != NULL) {
			mac_error = mpc->mpc_ops->mpo_audit_check_postselect(cred,
			    syscode, args, error, retval);
			ret = (ret > mac_error ? ret : mac_error);
		}
	}
	if (mac_policy_list_conditional_busy() != 0) {
		for (; i <= mac_policy_list.maxindex; i++) {
			mpc = mac_policy_list.entries[i].mpc;
			if (mpc == NULL)
				continue;

			if (mpc->mpc_ops->mpo_audit_check_postselect != NULL) {
				mac_error = mpc->mpc_ops->mpo_audit_check_postselect(cred,
				    syscode, args, error, retval);
				ret = (ret > mac_error ? ret : mac_error);
			}
		}
		mac_policy_list_unbusy();
	}

	return (ret);
}

#else	/* !CONFIG_AUDIT */

/*
 * Function stubs for when AUDIT isn't defined.
 */

int
mac_system_check_audit(__unused struct ucred *cred, __unused void *record, __unused int length)
{

	return (0);
}

int
mac_system_check_auditon(__unused struct ucred *cred, __unused int cmd)
{

	return (0);
}

int
mac_system_check_auditctl(__unused struct ucred *cred, __unused struct vnode *vp)
{

	return (0);
}

int
mac_proc_check_getauid(__unused struct proc *curp)
{

	return (0);
}

int
mac_proc_check_setauid(__unused struct proc *curp, __unused uid_t auid)
{

	return (0);
}

int
mac_proc_check_getaudit(__unused struct proc *curp)
{

	return (0);
}

int
mac_proc_check_setaudit(__unused struct proc *curp,
    __unused struct auditinfo_addr *ai)
{

	return (0);
}

int
mac_audit_check_preselect(__unused struct ucred *cred, __unused unsigned short syscode,
    __unused void *args)
{

	return (MAC_AUDIT_DEFAULT);
}

int
mac_audit_check_postselect(__unused struct ucred *cred, __unused unsigned short syscode,
    __unused void *args, __unused int error, __unused int retval, __unused int mac_forced)
{

	return (MAC_AUDIT_DEFAULT);
}

int
mac_audit(__unused int len, __unused u_char *data)
{

	return (0);
}

int
mac_audit_text(__unused char *text, __unused mac_policy_handle_t handle)
{
	return (0);
}
#endif	/* !CONFIG_AUDIT */
Commit	Line	Data
2d21ac55 A	1	/*
	2	* Copyright (c) 2006-2007 Apple Inc. All rights reserved.
	3	*
	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
	5	*
	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. The rights granted to you under the License
	10	* may not be used to create, or enable the creation or redistribution of,
	11	* unlawful or unlicensed copies of an Apple operating system, or to
	12	* circumvent, violate, or enable the circumvention or violation of, any
	13	* terms of an Apple operating system software license agreement.
	14	*
	15	* Please obtain a copy of the License at
	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
	17	*
	18	* The Original Code and all software distributed under the License are
	19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
	24	* limitations under the License.
	25	*
	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
	27	*/
	28	/*
	29	* Copyright (c) 1999, 2000, 2001, 2002 Robert N. M. Watson
	30	* Copyright (c) 2001 Ilmar S. Habibulin
	31	* Copyright (c) 2001, 2002, 2003, 2004 Networks Associates Technology, Inc.
	32	*
	33	* This software was developed by Robert Watson and Ilmar Habibulin for the
	34	* TrustedBSD Project.
	35	*
	36	* This software was developed for the FreeBSD Project in part by Network
	37	* Associates Laboratories, the Security Research Division of Network
	38	* Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"),
	39	* as part of the DARPA CHATS research program.
	40	*
	41	* Redistribution and use in source and binary forms, with or without
	42	* modification, are permitted provided that the following conditions
	43	* are met:
	44	* 1. Redistributions of source code must retain the above copyright
	45	* notice, this list of conditions and the following disclaimer.
	46	* 2. Redistributions in binary form must reproduce the above copyright
	47	* notice, this list of conditions and the following disclaimer in the
	48	* documentation and/or other materials provided with the distribution.
	49	*
	50	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
	51	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	52	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	53	* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
	54	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	55	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	56	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	57	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	58	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	59	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	60	* SUCH DAMAGE.
	61	*
	62	*/
	63	#include <sys/param.h>
	64	#include <sys/types.h>
65	#include <sys/vnode.h>
66	#include <sys/vnode_internal.h>
67	#include <sys/kauth.h>
68	#include <sys/queue.h>
69	#include <security/mac_internal.h>
70	#include <bsd/bsm/audit.h>
b0d623f7	71	#include <bsd/security/audit/audit.h>
2d21ac55 A	72	#include <bsd/sys/malloc.h>
	73	#include <vm/vm_kern.h>
	74	#include <kern/kalloc.h>
	75	#include <kern/zalloc.h>
	76
b0d623f7 A	77
	78	int mac_audit(__unused int len, __unused u_char *data);
	79
	80
	81	#if CONFIG_AUDIT
2d21ac55 A	82
	83	/* The zone allocator is initialized in mac_base.c. */
	84	zone_t mac_audit_data_zone;
	85
	86	int
	87	mac_system_check_audit(struct ucred cred, void record, int length)
	88	{
	89	int error;
	90
	91	MAC_CHECK(system_check_audit, cred, record, length);
	92
	93	return (error);
	94	}
	95
	96	int
	97	mac_system_check_auditon(struct ucred *cred, int cmd)
	98	{
	99	int error;
	100
	101	MAC_CHECK(system_check_auditon, cred, cmd);
	102
	103	return (error);
	104	}
	105
	106	int
	107	mac_system_check_auditctl(struct ucred cred, struct vnode vp)
	108	{
	109	int error;
	110	struct label *vl = vp ? vp->v_label : NULL;
	111
	112	MAC_CHECK(system_check_auditctl, cred, vp, vl);
	113
	114	return (error);
	115	}
	116
	117	int
	118	mac_proc_check_getauid(struct proc *curp)
	119	{
	120	kauth_cred_t cred;
	121	int error;
	122
	123	if (!mac_proc_enforce \|\|
	124	!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
	125	return 0;
	126
	127	cred = kauth_cred_proc_ref(curp);
	128	MAC_CHECK(proc_check_getauid, cred);
	129	kauth_cred_unref(&cred);
	130
	131	return (error);
	132	}
	133
	134	int
	135	mac_proc_check_setauid(struct proc *curp, uid_t auid)
	136	{
	137	kauth_cred_t cred;
	138	int error;
	139
	140	if (!mac_proc_enforce \|\|
	141	!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
	142	return 0;
	143
	144	cred = kauth_cred_proc_ref(curp);
	145	MAC_CHECK(proc_check_setauid, cred, auid);
146	kauth_cred_unref(&cred);
147
148	return (error);
149	}
150
151	int
152	mac_proc_check_getaudit(struct proc *curp)
153	{
154	kauth_cred_t cred;
155	int error;
156
157	if (!mac_proc_enforce \|\|
158	!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
159	return 0;
160
161	cred = kauth_cred_proc_ref(curp);
162	MAC_CHECK(proc_check_getaudit, cred);
163	kauth_cred_unref(&cred);
164
165	return (error);
166	}
167
168	int
b0d623f7	169	mac_proc_check_setaudit(struct proc curp, struct auditinfo_addr ai)
2d21ac55 A	170	{
	171	kauth_cred_t cred;
	172	int error;
	173
	174	if (!mac_proc_enforce \|\|
	175	!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
	176	return 0;
	177
	178	cred = kauth_cred_proc_ref(curp);
	179	MAC_CHECK(proc_check_setaudit, cred, ai);
	180	kauth_cred_unref(&cred);
	181
	182	return (error);
	183	}
	184
	185	#if 0
	186	/*
	187	* This is the framework entry point for MAC policies to use to add
	188	* arbitrary data to the current audit record.
	189	* (Currently not supported, as no existing audit viewers would
	190	* display this format)
	191	*
	192	*/
	193	int
	194	mac_audit_data(int len, u_char *data, mac_policy_handle_t handle)
	195	{
	196	char *sanitized;
	197
	198	if ((len <= 0) \|\| (len > MAC_AUDIT_DATA_LIMIT))
	199	return (EINVAL);
	200
	201	sanitized = (char *)zalloc(mac_audit_data_zone);
	202
	203	bcopy(data, sanitized, len);
	204	return (audit_mac_data(MAC_AUDIT_DATA_TYPE, len, sanitized));
	205	}
	206	#endif
	207
	208	/*
	209	* This is the entry point a MAC policy will call to add NULL-
	210	* terminated ASCII text to the current audit record.
	211	*/
	212	int
	213	mac_audit_text(char *text, mac_policy_handle_t handle)
	214	{
	215	char *sanitized;
	216	const char *name;
	217	int i, size, plen, len;
	218
	219	name = mac_get_mpc(handle)->mpc_name;
	220	len = strlen(text);
	221	plen = 2 + strlen(name);
	222	if (plen + len >= MAC_AUDIT_DATA_LIMIT)
	223	return (EINVAL);
	224
	225	/*
	226	* Make sure the text is only composed of only ASCII printable
	227	* characters.
	228	*/
	229	for (i=0; i < len; i++)
	230	if (text[i] < (char) 32 \|\| text[i] > (char) 126)
	231	return (EINVAL);
	232
	233	size = len + plen + 1;
234	sanitized = (char *)zalloc(mac_audit_data_zone);
235
236	strlcpy(sanitized, name, MAC_AUDIT_DATA_LIMIT);
237	strncat(sanitized, ": ", MAC_AUDIT_DATA_LIMIT - plen + 2);
238	strncat(sanitized, text, MAC_AUDIT_DATA_LIMIT - plen);
239
240	return (audit_mac_data(MAC_AUDIT_TEXT_TYPE, size, (u_char *)sanitized));
241	}
242
243	int
244	mac_audit_check_preselect(struct ucred cred, unsigned short syscode, void args)
245	{
246	struct mac_policy_conf *mpc;
247	int ret, error;
248	u_int i;
249
250	ret = MAC_AUDIT_DEFAULT;
251	for (i = 0; i < mac_policy_list.staticmax; i++) {
252	mpc = mac_policy_list.entries[i].mpc;
253	if (mpc == NULL)
254	continue;
255
256	if (mpc->mpc_ops->mpo_audit_check_preselect != NULL) {
257	error = mpc->mpc_ops->mpo_audit_check_preselect(cred,
258	syscode, args);
259	ret = (ret > error ? ret : error);
260	}
261	}
262	if (mac_policy_list_conditional_busy() != 0) {
263	for (; i <= mac_policy_list.maxindex; i++) {
264	mpc = mac_policy_list.entries[i].mpc;
265	if (mpc == NULL)
266	continue;
267
268	if (mpc->mpc_ops->mpo_audit_check_preselect != NULL) {
269	error = mpc->mpc_ops->mpo_audit_check_preselect(cred,
270	syscode, args);
271	ret = (ret > error ? ret : error);
272	}
273	}
274	mac_policy_list_unbusy();
275	}
276
277	return (ret);
278	}
279
280	int
281	mac_audit_check_postselect(struct ucred *cred, unsigned short syscode,
282	void *args, int error, int retval, int mac_forced)
283	{
284	struct mac_policy_conf *mpc;
285	int ret, mac_error;
286	u_int i;
287
288	/*
289	* If the audit was forced by a MAC policy by mac_audit_check_preselect(),
290	* echo that.
291	*/
292	if (mac_forced)
293	return (MAC_AUDIT_YES);
294
295	ret = MAC_AUDIT_DEFAULT;
296	for (i = 0; i < mac_policy_list.staticmax; i++) {
297	mpc = mac_policy_list.entries[i].mpc;
298	if (mpc == NULL)
299	continue;
300
301	if (mpc->mpc_ops->mpo_audit_check_postselect != NULL) {
302	mac_error = mpc->mpc_ops->mpo_audit_check_postselect(cred,
303	syscode, args, error, retval);
304	ret = (ret > mac_error ? ret : mac_error);
305	}
306	}
307	if (mac_policy_list_conditional_busy() != 0) {
308	for (; i <= mac_policy_list.maxindex; i++) {
309	mpc = mac_policy_list.entries[i].mpc;
310	if (mpc == NULL)
311	continue;
312
313	if (mpc->mpc_ops->mpo_audit_check_postselect != NULL) {
314	mac_error = mpc->mpc_ops->mpo_audit_check_postselect(cred,
315	syscode, args, error, retval);
316	ret = (ret > mac_error ? ret : mac_error);
317	}
318	}
319	mac_policy_list_unbusy();
320	}
321
322	return (ret);
323	}
324
b0d623f7	325	#else /* !CONFIG_AUDIT */
2d21ac55 A	326
	327	/*
	328	* Function stubs for when AUDIT isn't defined.
	329	*/
	330
	331	int
b0d623f7	332	mac_system_check_audit(__unused struct ucred cred, __unused void record, __unused int length)
2d21ac55 A	333	{
	334
	335	return (0);
	336	}
	337
	338	int
b0d623f7	339	mac_system_check_auditon(__unused struct ucred *cred, __unused int cmd)
2d21ac55 A	340	{
	341
	342	return (0);
	343	}
	344
	345	int
b0d623f7	346	mac_system_check_auditctl(__unused struct ucred cred, __unused struct vnode vp)
2d21ac55 A	347	{
	348
	349	return (0);
	350	}
	351
	352	int
	353	mac_proc_check_getauid(__unused struct proc *curp)
	354	{
	355
	356	return (0);
	357	}
	358
	359	int
	360	mac_proc_check_setauid(__unused struct proc *curp, __unused uid_t auid)
	361	{
	362
	363	return (0);
	364	}
	365
	366	int
	367	mac_proc_check_getaudit(__unused struct proc *curp)
	368	{
	369
	370	return (0);
	371	}
	372
	373	int
b0d623f7 A	374	mac_proc_check_setaudit(__unused struct proc *curp,
b0d623f7 A	375	__unused struct auditinfo_addr *ai)
2d21ac55 A	376	{
	377
	378	return (0);
	379	}
	380
	381	int
	382	mac_audit_check_preselect(__unused struct ucred *cred, __unused unsigned short syscode,
	383	__unused void *args)
	384	{
	385
	386	return (MAC_AUDIT_DEFAULT);
	387	}
	388
	389	int
	390	mac_audit_check_postselect(__unused struct ucred *cred, __unused unsigned short syscode,
	391	__unused void *args, __unused int error, __unused int retval, __unused int mac_forced)
	392	{
	393
	394	return (MAC_AUDIT_DEFAULT);
	395	}
	396
	397	int
b0d623f7	398	mac_audit(__unused int len, __unused u_char *data)
2d21ac55 A	399	{
	400
	401	return (0);
	402	}
4a3eedf9 A	403
	404	int
	405	mac_audit_text(__unused char *text, __unused mac_policy_handle_t handle)
	406	{
	407	return (0);
	408	}
b0d623f7	409	#endif /* !CONFIG_AUDIT */