[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>

#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 SECURITY_MAC_CHECK_ENFORCE
    /* 21167099 - only check if we allow write */
    if (!mac_proc_enforce)
        return 0;
#endif
    
	if (!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 SECURITY_MAC_CHECK_ENFORCE
    /* 21167099 - only check if we allow write */
    if (!mac_proc_enforce)
        return 0;
#endif
    if (!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 SECURITY_MAC_CHECK_ENFORCE
    /* 21167099 - only check if we allow write */
    if (!mac_proc_enforce)
        return 0;
#endif
    if (!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 SECURITY_MAC_CHECK_ENFORCE
    /* 21167099 - only check if we allow write */
    if (!mac_proc_enforce)
        return 0;
#endif
    if (!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_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	77	#if CONFIG_AUDIT
2d21ac55 A	78
	79	/* The zone allocator is initialized in mac_base.c. */
	80	zone_t mac_audit_data_zone;
	81
	82	int
	83	mac_system_check_audit(struct ucred cred, void record, int length)
	84	{
	85	int error;
	86
	87	MAC_CHECK(system_check_audit, cred, record, length);
	88
	89	return (error);
	90	}
	91
	92	int
	93	mac_system_check_auditon(struct ucred *cred, int cmd)
	94	{
	95	int error;
	96
	97	MAC_CHECK(system_check_auditon, cred, cmd);
	98
	99	return (error);
	100	}
	101
	102	int
	103	mac_system_check_auditctl(struct ucred cred, struct vnode vp)
	104	{
	105	int error;
	106	struct label *vl = vp ? vp->v_label : NULL;
	107
	108	MAC_CHECK(system_check_auditctl, cred, vp, vl);
	109
	110	return (error);
	111	}
	112
	113	int
	114	mac_proc_check_getauid(struct proc *curp)
	115	{
	116	kauth_cred_t cred;
	117	int error;
	118
3e170ce0 A	119	#if SECURITY_MAC_CHECK_ENFORCE
	120	/* 21167099 - only check if we allow write */
	121	if (!mac_proc_enforce)
	122	return 0;
	123	#endif
	124
	125	if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
2d21ac55 A	126	return 0;
	127
	128	cred = kauth_cred_proc_ref(curp);
	129	MAC_CHECK(proc_check_getauid, cred);
	130	kauth_cred_unref(&cred);
	131
	132	return (error);
	133	}
	134
	135	int
	136	mac_proc_check_setauid(struct proc *curp, uid_t auid)
	137	{
	138	kauth_cred_t cred;
	139	int error;
	140
3e170ce0 A	141	#if SECURITY_MAC_CHECK_ENFORCE
	142	/* 21167099 - only check if we allow write */
	143	if (!mac_proc_enforce)
	144	return 0;
	145	#endif
	146	if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
	147	return 0;
2d21ac55 A	148
	149	cred = kauth_cred_proc_ref(curp);
	150	MAC_CHECK(proc_check_setauid, cred, auid);
	151	kauth_cred_unref(&cred);
	152
	153	return (error);
	154	}
	155
	156	int
	157	mac_proc_check_getaudit(struct proc *curp)
	158	{
	159	kauth_cred_t cred;
	160	int error;
	161
3e170ce0 A	162	#if SECURITY_MAC_CHECK_ENFORCE
	163	/* 21167099 - only check if we allow write */
	164	if (!mac_proc_enforce)
	165	return 0;
	166	#endif
	167	if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
	168	return 0;
2d21ac55 A	169
	170	cred = kauth_cred_proc_ref(curp);
	171	MAC_CHECK(proc_check_getaudit, cred);
	172	kauth_cred_unref(&cred);
	173
	174	return (error);
	175	}
	176
	177	int
b0d623f7	178	mac_proc_check_setaudit(struct proc curp, struct auditinfo_addr ai)
2d21ac55 A	179	{
	180	kauth_cred_t cred;
	181	int error;
	182
3e170ce0 A	183	#if SECURITY_MAC_CHECK_ENFORCE
	184	/* 21167099 - only check if we allow write */
	185	if (!mac_proc_enforce)
	186	return 0;
	187	#endif
	188	if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
	189	return 0;
2d21ac55 A	190
	191	cred = kauth_cred_proc_ref(curp);
	192	MAC_CHECK(proc_check_setaudit, cred, ai);
	193	kauth_cred_unref(&cred);
	194
	195	return (error);
	196	}
	197
	198	#if 0
	199	/*
	200	* This is the framework entry point for MAC policies to use to add
	201	* arbitrary data to the current audit record.
	202	* (Currently not supported, as no existing audit viewers would
	203	* display this format)
	204	*
	205	*/
	206	int
	207	mac_audit_data(int len, u_char *data, mac_policy_handle_t handle)
	208	{
	209	char *sanitized;
	210
	211	if ((len <= 0) \|\| (len > MAC_AUDIT_DATA_LIMIT))
	212	return (EINVAL);
	213
	214	sanitized = (char *)zalloc(mac_audit_data_zone);
	215
	216	bcopy(data, sanitized, len);
	217	return (audit_mac_data(MAC_AUDIT_DATA_TYPE, len, sanitized));
	218	}
	219	#endif
	220
	221	/*
	222	* This is the entry point a MAC policy will call to add NULL-
	223	* terminated ASCII text to the current audit record.
	224	*/
	225	int
	226	mac_audit_text(char *text, mac_policy_handle_t handle)
	227	{
	228	char *sanitized;
	229	const char *name;
	230	int i, size, plen, len;
	231
	232	name = mac_get_mpc(handle)->mpc_name;
	233	len = strlen(text);
	234	plen = 2 + strlen(name);
	235	if (plen + len >= MAC_AUDIT_DATA_LIMIT)
	236	return (EINVAL);
	237
	238	/*
	239	* Make sure the text is only composed of only ASCII printable
	240	* characters.
	241	*/
	242	for (i=0; i < len; i++)
	243	if (text[i] < (char) 32 \|\| text[i] > (char) 126)
	244	return (EINVAL);
	245
	246	size = len + plen + 1;
	247	sanitized = (char *)zalloc(mac_audit_data_zone);
	248
	249	strlcpy(sanitized, name, MAC_AUDIT_DATA_LIMIT);
	250	strncat(sanitized, ": ", MAC_AUDIT_DATA_LIMIT - plen + 2);
	251	strncat(sanitized, text, MAC_AUDIT_DATA_LIMIT - plen);
	252
	253	return (audit_mac_data(MAC_AUDIT_TEXT_TYPE, size, (u_char *)sanitized));
254	}
255
256	int
257	mac_audit_check_preselect(struct ucred cred, unsigned short syscode, void args)
258	{
259	struct mac_policy_conf *mpc;
260	int ret, error;
261	u_int i;
262
263	ret = MAC_AUDIT_DEFAULT;
264	for (i = 0; i < mac_policy_list.staticmax; i++) {
265	mpc = mac_policy_list.entries[i].mpc;
266	if (mpc == NULL)
267	continue;
268
269	if (mpc->mpc_ops->mpo_audit_check_preselect != NULL) {
270	error = mpc->mpc_ops->mpo_audit_check_preselect(cred,
271	syscode, args);
272	ret = (ret > error ? ret : error);
273	}
274	}
275	if (mac_policy_list_conditional_busy() != 0) {
276	for (; i <= mac_policy_list.maxindex; i++) {
277	mpc = mac_policy_list.entries[i].mpc;
278	if (mpc == NULL)
279	continue;
280
281	if (mpc->mpc_ops->mpo_audit_check_preselect != NULL) {
282	error = mpc->mpc_ops->mpo_audit_check_preselect(cred,
283	syscode, args);
284	ret = (ret > error ? ret : error);
285	}
286	}
287	mac_policy_list_unbusy();
288	}
289
290	return (ret);
291	}
292
293	int
294	mac_audit_check_postselect(struct ucred *cred, unsigned short syscode,
295	void *args, int error, int retval, int mac_forced)
296	{
297	struct mac_policy_conf *mpc;
298	int ret, mac_error;
299	u_int i;
300
301	/*
302	* If the audit was forced by a MAC policy by mac_audit_check_preselect(),
303	* echo that.
304	*/
305	if (mac_forced)
306	return (MAC_AUDIT_YES);
307
308	ret = MAC_AUDIT_DEFAULT;
309	for (i = 0; i < mac_policy_list.staticmax; i++) {
310	mpc = mac_policy_list.entries[i].mpc;
311	if (mpc == NULL)
312	continue;
313
314	if (mpc->mpc_ops->mpo_audit_check_postselect != NULL) {
315	mac_error = mpc->mpc_ops->mpo_audit_check_postselect(cred,
316	syscode, args, error, retval);
317	ret = (ret > mac_error ? ret : mac_error);
318	}
319	}
320	if (mac_policy_list_conditional_busy() != 0) {
321	for (; i <= mac_policy_list.maxindex; i++) {
322	mpc = mac_policy_list.entries[i].mpc;
323	if (mpc == NULL)
324	continue;
325
326	if (mpc->mpc_ops->mpo_audit_check_postselect != NULL) {
327	mac_error = mpc->mpc_ops->mpo_audit_check_postselect(cred,
328	syscode, args, error, retval);
329	ret = (ret > mac_error ? ret : mac_error);
330	}
331	}
332	mac_policy_list_unbusy();
333	}
334
335	return (ret);
336	}
337
b0d623f7	338	#else /* !CONFIG_AUDIT */
2d21ac55 A	339
	340	/*
	341	* Function stubs for when AUDIT isn't defined.
	342	*/
	343
	344	int
b0d623f7	345	mac_system_check_audit(__unused struct ucred cred, __unused void record, __unused int length)
2d21ac55 A	346	{
	347
	348	return (0);
	349	}
	350
	351	int
b0d623f7	352	mac_system_check_auditon(__unused struct ucred *cred, __unused int cmd)
2d21ac55 A	353	{
	354
	355	return (0);
	356	}
	357
	358	int
b0d623f7	359	mac_system_check_auditctl(__unused struct ucred cred, __unused struct vnode vp)
2d21ac55 A	360	{
	361
	362	return (0);
	363	}
	364
	365	int
	366	mac_proc_check_getauid(__unused struct proc *curp)
	367	{
	368
	369	return (0);
	370	}
	371
	372	int
	373	mac_proc_check_setauid(__unused struct proc *curp, __unused uid_t auid)
	374	{
	375
	376	return (0);
	377	}
	378
	379	int
	380	mac_proc_check_getaudit(__unused struct proc *curp)
	381	{
	382
	383	return (0);
	384	}
	385
	386	int
b0d623f7 A	387	mac_proc_check_setaudit(__unused struct proc *curp,
b0d623f7 A	388	__unused struct auditinfo_addr *ai)
2d21ac55 A	389	{
	390
	391	return (0);
	392	}
	393
	394	int
	395	mac_audit_check_preselect(__unused struct ucred *cred, __unused unsigned short syscode,
	396	__unused void *args)
	397	{
	398
	399	return (MAC_AUDIT_DEFAULT);
	400	}
	401
	402	int
	403	mac_audit_check_postselect(__unused struct ucred *cred, __unused unsigned short syscode,
	404	__unused void *args, __unused int error, __unused int retval, __unused int mac_forced)
	405	{
	406
	407	return (MAC_AUDIT_DEFAULT);
	408	}
	409
4a3eedf9 A	410	int
	411	mac_audit_text(__unused char *text, __unused mac_policy_handle_t handle)
	412	{
	413	return (0);
	414	}
b0d623f7	415	#endif /* !CONFIG_AUDIT */