From: Stricted <info@stricted.net>
Date: Fri, 20 Apr 2018 17:32:32 +0000 (+0200)
Subject: security: update selinux
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=949c2c1d6fb4f80f5fbc031f446fc3160ffd77a6;p=GitHub%2Fmt8127%2Fandroid_kernel_alcatel_ttab.git

security: update selinux
---

diff --git a/security/selinux/avc.c b/security/selinux/avc.c
index ae6b6ed2f6de..920ac9a0f176 100644
--- a/security/selinux/avc.c
+++ b/security/selinux/avc.c
@@ -22,6 +22,7 @@
 #include <linux/init.h>
 #include <linux/skbuff.h>
 #include <linux/percpu.h>
+#include <linux/list.h>
 #include <net/sock.h>
 #include <linux/un.h>
 #include <net/af_unix.h>
@@ -48,6 +49,7 @@ struct avc_entry {
 	u32			tsid;
 	u16			tclass;
 	struct av_decision	avd;
+	struct avc_xperms_node	*xp_node;
 };
 
 struct avc_node {
@@ -56,6 +58,16 @@ struct avc_node {
 	struct rcu_head		rhead;
 };
 
+struct avc_xperms_decision_node {
+	struct extended_perms_decision xpd;
+	struct list_head xpd_list; /* list of extended_perms_decision */
+};
+
+struct avc_xperms_node {
+	struct extended_perms xp;
+	struct list_head xpd_head; /* list head of extended_perms_decision */
+};
+
 struct avc_cache {
 	struct hlist_head	slots[AVC_CACHE_SLOTS]; /* head for avc_node->list */
 	spinlock_t		slots_lock[AVC_CACHE_SLOTS]; /* lock for writes */
@@ -80,6 +92,9 @@ DEFINE_PER_CPU(struct avc_cache_stats, avc_cache_stats) = { 0 };
 static struct avc_cache avc_cache;
 static struct avc_callback_node *avc_callbacks;
 static struct kmem_cache *avc_node_cachep;
+static struct kmem_cache *avc_xperms_data_cachep;
+static struct kmem_cache *avc_xperms_decision_cachep;
+static struct kmem_cache *avc_xperms_cachep;
 
 static inline int avc_hash(u32 ssid, u32 tsid, u16 tclass)
 {
@@ -170,7 +185,17 @@ void __init avc_init(void)
 	atomic_set(&avc_cache.lru_hint, 0);
 
 	avc_node_cachep = kmem_cache_create("avc_node", sizeof(struct avc_node),
-					     0, SLAB_PANIC, NULL);
+					0, SLAB_PANIC, NULL);
+	avc_xperms_cachep = kmem_cache_create("avc_xperms_node",
+					sizeof(struct avc_xperms_node),
+					0, SLAB_PANIC, NULL);
+	avc_xperms_decision_cachep = kmem_cache_create(
+					"avc_xperms_decision_node",
+					sizeof(struct avc_xperms_decision_node),
+					0, SLAB_PANIC, NULL);
+	avc_xperms_data_cachep = kmem_cache_create("avc_xperms_data",
+					sizeof(struct extended_perms_data),
+					0, SLAB_PANIC, NULL);
 
 	audit_log(current->audit_context, GFP_KERNEL, AUDIT_KERNEL, "AVC INITIALIZED\n");
 }
@@ -205,9 +230,261 @@ int avc_get_hash_stats(char *page)
 			 slots_used, AVC_CACHE_SLOTS, max_chain_len);
 }
 
+/*
+ * using a linked list for extended_perms_decision lookup because the list is
+ * always small. i.e. less than 5, typically 1
+ */
+static struct extended_perms_decision *avc_xperms_decision_lookup(u8 driver,
+					struct avc_xperms_node *xp_node)
+{
+	struct avc_xperms_decision_node *xpd_node;
+
+	list_for_each_entry(xpd_node, &xp_node->xpd_head, xpd_list) {
+		if (xpd_node->xpd.driver == driver)
+			return &xpd_node->xpd;
+	}
+	return NULL;
+}
+
+static inline unsigned int
+avc_xperms_has_perm(struct extended_perms_decision *xpd,
+					u8 perm, u8 which)
+{
+	unsigned int rc = 0;
+
+	if ((which == XPERMS_ALLOWED) &&
+			(xpd->used & XPERMS_ALLOWED))
+		rc = security_xperm_test(xpd->allowed->p, perm);
+	else if ((which == XPERMS_AUDITALLOW) &&
+			(xpd->used & XPERMS_AUDITALLOW))
+		rc = security_xperm_test(xpd->auditallow->p, perm);
+	else if ((which == XPERMS_DONTAUDIT) &&
+			(xpd->used & XPERMS_DONTAUDIT))
+		rc = security_xperm_test(xpd->dontaudit->p, perm);
+	return rc;
+}
+
+static void avc_xperms_allow_perm(struct avc_xperms_node *xp_node,
+				u8 driver, u8 perm)
+{
+	struct extended_perms_decision *xpd;
+	security_xperm_set(xp_node->xp.drivers.p, driver);
+	xpd = avc_xperms_decision_lookup(driver, xp_node);
+	if (xpd && xpd->allowed)
+		security_xperm_set(xpd->allowed->p, perm);
+}
+
+static void avc_xperms_decision_free(struct avc_xperms_decision_node *xpd_node)
+{
+	struct extended_perms_decision *xpd;
+
+	xpd = &xpd_node->xpd;
+	if (xpd->allowed)
+		kmem_cache_free(avc_xperms_data_cachep, xpd->allowed);
+	if (xpd->auditallow)
+		kmem_cache_free(avc_xperms_data_cachep, xpd->auditallow);
+	if (xpd->dontaudit)
+		kmem_cache_free(avc_xperms_data_cachep, xpd->dontaudit);
+	kmem_cache_free(avc_xperms_decision_cachep, xpd_node);
+}
+
+static void avc_xperms_free(struct avc_xperms_node *xp_node)
+{
+	struct avc_xperms_decision_node *xpd_node, *tmp;
+
+	if (!xp_node)
+		return;
+
+	list_for_each_entry_safe(xpd_node, tmp, &xp_node->xpd_head, xpd_list) {
+		list_del(&xpd_node->xpd_list);
+		avc_xperms_decision_free(xpd_node);
+	}
+	kmem_cache_free(avc_xperms_cachep, xp_node);
+}
+
+static void avc_copy_xperms_decision(struct extended_perms_decision *dest,
+					struct extended_perms_decision *src)
+{
+	dest->driver = src->driver;
+	dest->used = src->used;
+	if (dest->used & XPERMS_ALLOWED)
+		memcpy(dest->allowed->p, src->allowed->p,
+				sizeof(src->allowed->p));
+	if (dest->used & XPERMS_AUDITALLOW)
+		memcpy(dest->auditallow->p, src->auditallow->p,
+				sizeof(src->auditallow->p));
+	if (dest->used & XPERMS_DONTAUDIT)
+		memcpy(dest->dontaudit->p, src->dontaudit->p,
+				sizeof(src->dontaudit->p));
+}
+
+/*
+ * similar to avc_copy_xperms_decision, but only copy decision
+ * information relevant to this perm
+ */
+static inline void avc_quick_copy_xperms_decision(u8 perm,
+			struct extended_perms_decision *dest,
+			struct extended_perms_decision *src)
+{
+	/*
+	 * compute index of the u32 of the 256 bits (8 u32s) that contain this
+	 * command permission
+	 */
+	u8 i = perm >> 5;
+
+	dest->used = src->used;
+	if (dest->used & XPERMS_ALLOWED)
+		dest->allowed->p[i] = src->allowed->p[i];
+	if (dest->used & XPERMS_AUDITALLOW)
+		dest->auditallow->p[i] = src->auditallow->p[i];
+	if (dest->used & XPERMS_DONTAUDIT)
+		dest->dontaudit->p[i] = src->dontaudit->p[i];
+}
+
+static struct avc_xperms_decision_node
+		*avc_xperms_decision_alloc(u8 which)
+{
+	struct avc_xperms_decision_node *xpd_node;
+	struct extended_perms_decision *xpd;
+
+	xpd_node = kmem_cache_zalloc(avc_xperms_decision_cachep,
+				GFP_ATOMIC | __GFP_NOMEMALLOC);
+	if (!xpd_node)
+		return NULL;
+
+	xpd = &xpd_node->xpd;
+	if (which & XPERMS_ALLOWED) {
+		xpd->allowed = kmem_cache_zalloc(avc_xperms_data_cachep,
+						GFP_ATOMIC | __GFP_NOMEMALLOC);
+		if (!xpd->allowed)
+			goto error;
+	}
+	if (which & XPERMS_AUDITALLOW) {
+		xpd->auditallow = kmem_cache_zalloc(avc_xperms_data_cachep,
+						GFP_ATOMIC | __GFP_NOMEMALLOC);
+		if (!xpd->auditallow)
+			goto error;
+	}
+	if (which & XPERMS_DONTAUDIT) {
+		xpd->dontaudit = kmem_cache_zalloc(avc_xperms_data_cachep,
+						GFP_ATOMIC | __GFP_NOMEMALLOC);
+		if (!xpd->dontaudit)
+			goto error;
+	}
+	return xpd_node;
+error:
+	avc_xperms_decision_free(xpd_node);
+	return NULL;
+}
+
+static int avc_add_xperms_decision(struct avc_node *node,
+			struct extended_perms_decision *src)
+{
+	struct avc_xperms_decision_node *dest_xpd;
+
+	node->ae.xp_node->xp.len++;
+	dest_xpd = avc_xperms_decision_alloc(src->used);
+	if (!dest_xpd)
+		return -ENOMEM;
+	avc_copy_xperms_decision(&dest_xpd->xpd, src);
+	list_add(&dest_xpd->xpd_list, &node->ae.xp_node->xpd_head);
+	return 0;
+}
+
+static struct avc_xperms_node *avc_xperms_alloc(void)
+{
+	struct avc_xperms_node *xp_node;
+
+	xp_node = kmem_cache_zalloc(avc_xperms_cachep,
+				GFP_ATOMIC|__GFP_NOMEMALLOC);
+	if (!xp_node)
+		return xp_node;
+	INIT_LIST_HEAD(&xp_node->xpd_head);
+	return xp_node;
+}
+
+static int avc_xperms_populate(struct avc_node *node,
+				struct avc_xperms_node *src)
+{
+	struct avc_xperms_node *dest;
+	struct avc_xperms_decision_node *dest_xpd;
+	struct avc_xperms_decision_node *src_xpd;
+
+	if (src->xp.len == 0)
+		return 0;
+	dest = avc_xperms_alloc();
+	if (!dest)
+		return -ENOMEM;
+
+	memcpy(dest->xp.drivers.p, src->xp.drivers.p, sizeof(dest->xp.drivers.p));
+	dest->xp.len = src->xp.len;
+
+	/* for each source xpd allocate a destination xpd and copy */
+	list_for_each_entry(src_xpd, &src->xpd_head, xpd_list) {
+		dest_xpd = avc_xperms_decision_alloc(src_xpd->xpd.used);
+		if (!dest_xpd)
+			goto error;
+		avc_copy_xperms_decision(&dest_xpd->xpd, &src_xpd->xpd);
+		list_add(&dest_xpd->xpd_list, &dest->xpd_head);
+	}
+	node->ae.xp_node = dest;
+	return 0;
+error:
+	avc_xperms_free(dest);
+	return -ENOMEM;
+
+}
+
+static inline u32 avc_xperms_audit_required(u32 requested,
+					struct av_decision *avd,
+					struct extended_perms_decision *xpd,
+					u8 perm,
+					int result,
+					u32 *deniedp)
+{
+	u32 denied, audited;
+
+	denied = requested & ~avd->allowed;
+	if (unlikely(denied)) {
+		audited = denied & avd->auditdeny;
+		if (audited && xpd) {
+			if (avc_xperms_has_perm(xpd, perm, XPERMS_DONTAUDIT))
+				audited &= ~requested;
+		}
+	} else if (result) {
+		audited = denied = requested;
+	} else {
+		audited = requested & avd->auditallow;
+		if (audited && xpd) {
+			if (!avc_xperms_has_perm(xpd, perm, XPERMS_AUDITALLOW))
+				audited &= ~requested;
+		}
+	}
+
+	*deniedp = denied;
+	return audited;
+}
+
+static inline int avc_xperms_audit(u32 ssid, u32 tsid, u16 tclass,
+				u32 requested, struct av_decision *avd,
+				struct extended_perms_decision *xpd,
+				u8 perm, int result,
+				struct common_audit_data *ad)
+{
+	u32 audited, denied;
+
+	audited = avc_xperms_audit_required(
+			requested, avd, xpd, perm, result, &denied);
+	if (likely(!audited))
+		return 0;
+	return slow_avc_audit(ssid, tsid, tclass, requested,
+			audited, denied, result, ad, 0);
+}
+
 static void avc_node_free(struct rcu_head *rhead)
 {
 	struct avc_node *node = container_of(rhead, struct avc_node, rhead);
+	avc_xperms_free(node->ae.xp_node);
 	kmem_cache_free(avc_node_cachep, node);
 	avc_cache_stats_incr(frees);
 }
@@ -221,6 +498,7 @@ static void avc_node_delete(struct avc_node *node)
 
 static void avc_node_kill(struct avc_node *node)
 {
+	avc_xperms_free(node->ae.xp_node);
 	kmem_cache_free(avc_node_cachep, node);
 	avc_cache_stats_incr(frees);
 	atomic_dec(&avc_cache.active_nodes);
@@ -367,6 +645,7 @@ static int avc_latest_notif_update(int seqno, int is_insert)
  * @tsid: target security identifier
  * @tclass: target security class
  * @avd: resulting av decision
+ * @xp_node: resulting extended permissions
  *
  * Insert an AVC entry for the SID pair
  * (@ssid, @tsid) and class @tclass.
@@ -378,7 +657,9 @@ static int avc_latest_notif_update(int seqno, int is_insert)
  * the access vectors into a cache entry, returns
  * avc_node inserted. Otherwise, this function returns NULL.
  */
-static struct avc_node *avc_insert(u32 ssid, u32 tsid, u16 tclass, struct av_decision *avd)
+static struct avc_node *avc_insert(u32 ssid, u32 tsid, u16 tclass,
+				struct av_decision *avd,
+				struct avc_xperms_node *xp_node)
 {
 	struct avc_node *pos, *node = NULL;
 	int hvalue;
@@ -391,10 +672,15 @@ static struct avc_node *avc_insert(u32 ssid, u32 tsid, u16 tclass, struct av_dec
 	if (node) {
 		struct hlist_head *head;
 		spinlock_t *lock;
+		int rc = 0;
 
 		hvalue = avc_hash(ssid, tsid, tclass);
 		avc_node_populate(node, ssid, tsid, tclass, avd);
-
+		rc = avc_xperms_populate(node, xp_node);
+		if (rc) {
+			kmem_cache_free(avc_node_cachep, node);
+			return NULL;
+		}
 		head = &avc_cache.slots[hvalue];
 		lock = &avc_cache.slots_lock[hvalue];
 
@@ -437,9 +723,6 @@ static void avc_audit_pre_callback(struct audit_buffer *ab, void *a)
  * @ab: the audit buffer
  * @a: audit_data
  */
-#ifdef CONFIG_MTK_AEE_FEATURE
-extern void mtk_audit_hook(char *data); 
-#endif
 static void avc_audit_post_callback(struct audit_buffer *ab, void *a)
 {
 	struct common_audit_data *ad = a;
@@ -450,19 +733,6 @@ static void avc_audit_post_callback(struct audit_buffer *ab, void *a)
 	if (ad->selinux_audit_data->denied) {
 		audit_log_format(ab, " permissive=%u",
 				 ad->selinux_audit_data->result ? 0 : 1);
-		#ifdef CONFIG_MTK_AEE_FEATURE				 
-		{		 
-			int rc;
-			char *scontext;
-			u32 scontext_len;
-			rc = security_sid_to_context(ad->selinux_audit_data->ssid, &scontext, &scontext_len);
-			if (!rc){
-				printk(KERN_WARNING "audit avc scontext:%s\n",scontext);
-				//mtk_audit_hook(scontext);
-			}
-			kfree(scontext);
-		}
-		#endif
 	}
 }
 
@@ -544,14 +814,17 @@ static inline int avc_sidcmp(u32 x, u32 y)
  * @perms : Permission mask bits
  * @ssid,@tsid,@tclass : identifier of an AVC entry
  * @seqno : sequence number when decision was made
+ * @xpd: extended_perms_decision to be added to the node
  *
  * if a valid AVC entry doesn't exist,this function returns -ENOENT.
  * if kmalloc() called internal returns NULL, this function returns -ENOMEM.
  * otherwise, this function updates the AVC entry. The original AVC-entry object
  * will release later by RCU.
  */
-static int avc_update_node(u32 event, u32 perms, u32 ssid, u32 tsid, u16 tclass,
-			   u32 seqno)
+static int avc_update_node(u32 event, u32 perms, u8 driver, u8 xperm, u32 ssid,
+			u32 tsid, u16 tclass, u32 seqno,
+			struct extended_perms_decision *xpd,
+			u32 flags)
 {
 	int hvalue, rc = 0;
 	unsigned long flag;
@@ -595,9 +868,19 @@ static int avc_update_node(u32 event, u32 perms, u32 ssid, u32 tsid, u16 tclass,
 
 	avc_node_populate(node, ssid, tsid, tclass, &orig->ae.avd);
 
+	if (orig->ae.xp_node) {
+		rc = avc_xperms_populate(node, orig->ae.xp_node);
+		if (rc) {
+			kmem_cache_free(avc_node_cachep, node);
+			goto out_unlock;
+		}
+	}
+
 	switch (event) {
 	case AVC_CALLBACK_GRANT:
 		node->ae.avd.allowed |= perms;
+		if (node->ae.xp_node && (flags & AVC_EXTENDED_PERMS))
+			avc_xperms_allow_perm(node->ae.xp_node, driver, xperm);
 		break;
 	case AVC_CALLBACK_TRY_REVOKE:
 	case AVC_CALLBACK_REVOKE:
@@ -615,6 +898,9 @@ static int avc_update_node(u32 event, u32 perms, u32 ssid, u32 tsid, u16 tclass,
 	case AVC_CALLBACK_AUDITDENY_DISABLE:
 		node->ae.avd.auditdeny &= ~perms;
 		break;
+	case AVC_CALLBACK_ADD_XPERMS:
+		avc_add_xperms_decision(node, xpd);
+		break;
 	}
 	avc_node_replace(node, orig);
 out_unlock:
@@ -686,30 +972,107 @@ int avc_ss_reset(u32 seqno)
  * results in a bigger stack frame.
  */
 static noinline struct avc_node *avc_compute_av(u32 ssid, u32 tsid,
-			 u16 tclass, struct av_decision *avd)
+			 u16 tclass, struct av_decision *avd,
+			 struct avc_xperms_node *xp_node)
 {
 	rcu_read_unlock();
-	security_compute_av(ssid, tsid, tclass, avd);
+	INIT_LIST_HEAD(&xp_node->xpd_head);
+	security_compute_av(ssid, tsid, tclass, avd, &xp_node->xp);
 	rcu_read_lock();
-	return avc_insert(ssid, tsid, tclass, avd);
+	return avc_insert(ssid, tsid, tclass, avd, xp_node);
 }
 
 static noinline int avc_denied(u32 ssid, u32 tsid,
-			 u16 tclass, u32 requested,
-			 unsigned flags,
-			 struct av_decision *avd)
+				u16 tclass, u32 requested,
+				u8 driver, u8 xperm, unsigned flags,
+				struct av_decision *avd)
 {
-	if (flags & AVC_STRICT)
-		return -EACCES;
-
-	if (selinux_enforcing && !(avd->flags & AVD_FLAGS_PERMISSIVE))
-		return -EACCES;
 
-	avc_update_node(AVC_CALLBACK_GRANT, requested, ssid,
-				tsid, tclass, avd->seqno);
+	avc_update_node(AVC_CALLBACK_GRANT, requested, driver, xperm, ssid,
+				tsid, tclass, avd->seqno, NULL, flags);
 	return 0;
 }
 
+/*
+ * The avc extended permissions logic adds an additional 256 bits of
+ * permissions to an avc node when extended permissions for that node are
+ * specified in the avtab. If the additional 256 permissions is not adequate,
+ * as-is the case with ioctls, then multiple may be chained together and the
+ * driver field is used to specify which set contains the permission.
+ */
+int avc_has_extended_perms(u32 ssid, u32 tsid, u16 tclass, u32 requested,
+			u8 driver, u8 xperm, struct common_audit_data *ad)
+{
+	struct avc_node *node;
+	struct av_decision avd;
+	u32 denied;
+	struct extended_perms_decision local_xpd;
+	struct extended_perms_decision *xpd = NULL;
+	struct extended_perms_data allowed;
+	struct extended_perms_data auditallow;
+	struct extended_perms_data dontaudit;
+	struct avc_xperms_node local_xp_node;
+	struct avc_xperms_node *xp_node;
+	int rc = 0, rc2;
+
+	xp_node = &local_xp_node;
+	BUG_ON(!requested);
+
+	rcu_read_lock();
+
+	node = avc_lookup(ssid, tsid, tclass);
+	if (unlikely(!node)) {
+		node = avc_compute_av(ssid, tsid, tclass, &avd, xp_node);
+	} else {
+		memcpy(&avd, &node->ae.avd, sizeof(avd));
+		xp_node = node->ae.xp_node;
+	}
+	/* if extended permissions are not defined, only consider av_decision */
+	if (!xp_node || !xp_node->xp.len)
+		goto decision;
+
+	local_xpd.allowed = &allowed;
+	local_xpd.auditallow = &auditallow;
+	local_xpd.dontaudit = &dontaudit;
+
+	xpd = avc_xperms_decision_lookup(driver, xp_node);
+	if (unlikely(!xpd)) {
+		/*
+		 * Compute the extended_perms_decision only if the driver
+		 * is flagged
+		 */
+		if (!security_xperm_test(xp_node->xp.drivers.p, driver)) {
+			avd.allowed &= ~requested;
+			goto decision;
+		}
+		rcu_read_unlock();
+		security_compute_xperms_decision(ssid, tsid, tclass, driver,
+						&local_xpd);
+		rcu_read_lock();
+		avc_update_node(AVC_CALLBACK_ADD_XPERMS, requested, driver, xperm,
+				ssid, tsid, tclass, avd.seqno, &local_xpd, 0);
+	} else {
+		avc_quick_copy_xperms_decision(xperm, &local_xpd, xpd);
+	}
+	xpd = &local_xpd;
+
+	if (!avc_xperms_has_perm(xpd, xperm, XPERMS_ALLOWED))
+		avd.allowed &= ~requested;
+
+decision:
+	denied = requested & ~(avd.allowed);
+	if (unlikely(denied))
+		rc = avc_denied(ssid, tsid, tclass, requested, driver, xperm,
+				AVC_EXTENDED_PERMS, &avd);
+
+	rcu_read_unlock();
+
+	rc2 = avc_xperms_audit(ssid, tsid, tclass, requested,
+			&avd, xpd, xperm, rc, ad);
+	if (rc2)
+		return rc2;
+	return rc;
+}
 
 /**
  * avc_has_perm_noaudit - Check permissions but perform no auditing.
@@ -737,6 +1100,7 @@ inline int avc_has_perm_noaudit(u32 ssid, u32 tsid,
 			 struct av_decision *avd)
 {
 	struct avc_node *node;
+	struct avc_xperms_node xp_node;
 	int rc = 0;
 	u32 denied;
 
@@ -745,16 +1109,14 @@ inline int avc_has_perm_noaudit(u32 ssid, u32 tsid,
 	rcu_read_lock();
 
 	node = avc_lookup(ssid, tsid, tclass);
-	if (unlikely(!node)) {
-		node = avc_compute_av(ssid, tsid, tclass, avd);
-	} else {
+	if (unlikely(!node))
+		node = avc_compute_av(ssid, tsid, tclass, avd, &xp_node);
+	else
 		memcpy(avd, &node->ae.avd, sizeof(*avd));
-		avd = &node->ae.avd;
-	}
 
 	denied = requested & ~(avd->allowed);
 	if (unlikely(denied))
-		rc = avc_denied(ssid, tsid, tclass, requested, flags, avd);
+		rc = avc_denied(ssid, tsid, tclass, requested, 0, 0, flags, avd);
 
 	rcu_read_unlock();
 	return rc;
diff --git a/security/selinux/exports.c b/security/selinux/exports.c
index e75dd94e2d2b..c2d3f86408c6 100644
--- a/security/selinux/exports.c
+++ b/security/selinux/exports.c
@@ -15,9 +15,16 @@
 #include <linux/selinux.h>
 
 #include "security.h"
+#include "avc.h"
 
 bool selinux_is_enabled(void)
 {
 	return selinux_enabled;
 }
 EXPORT_SYMBOL_GPL(selinux_is_enabled);
+
+bool selinux_is_enforcing(void)
+{
+	return selinux_enforcing;
+}
+EXPORT_SYMBOL_GPL(selinux_is_enforcing);
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index fdead625043c..55bb7c6a1b41 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -85,6 +85,10 @@
 #include <linux/msg.h>
 #include <linux/shm.h>
 
+// [ SEC_SELINUX_PORTING COMMON
+#include <linux/delay.h>
+// ] SEC_SELINUX_PORTING COMMON
+
 #include "avc.h"
 #include "objsec.h"
 #include "netif.h"
@@ -110,6 +114,7 @@ static int __init enforcing_setup(char *str)
 	unsigned long enforcing;
 	if (!strict_strtoul(str, 0, &enforcing))
 		selinux_enforcing = enforcing ? 1 : 0;
+
 	return 1;
 }
 __setup("enforcing=", enforcing_setup);
@@ -123,6 +128,7 @@ static int __init selinux_enabled_setup(char *str)
 	unsigned long enabled;
 	if (!strict_strtoul(str, 0, &enabled))
 		selinux_enabled = enabled ? 1 : 0;
+
 	return 1;
 }
 __setup("selinux=", selinux_enabled_setup);
@@ -419,15 +425,12 @@ static int sb_finish_set_opts(struct super_block *sb)
 	    sbsec->behavior > ARRAY_SIZE(labeling_behaviors))
 		sbsec->flags &= ~SE_SBLABELSUPP;
 
-	/* Special handling for sysfs. Is genfs but also has setxattr handler*/
-	if (strncmp(sb->s_type->name, "sysfs", sizeof("sysfs")) == 0)
-		sbsec->flags |= SE_SBLABELSUPP;
-
-	/*
-	 * Special handling for rootfs. Is genfs but supports
-	 * setting SELinux context on in-core inodes.
-	 */
-	if (strncmp(sb->s_type->name, "rootfs", sizeof("rootfs")) == 0)
+	/* Special handling. Is genfs but also has in-core setxattr handler*/
+	if (!strcmp(sb->s_type->name, "sysfs") ||
+	    !strcmp(sb->s_type->name, "pstore") ||
+	    !strcmp(sb->s_type->name, "debugfs") ||
+	    !strcmp(sb->s_type->name, "tmpfs") ||
+	    !strcmp(sb->s_type->name, "rootfs"))
 		sbsec->flags |= SE_SBLABELSUPP;
 
 	/* Initialize the root inode. */
@@ -870,7 +873,6 @@ static int selinux_parse_opts_str(char *options,
 	char *context = NULL, *defcontext = NULL;
 	char *fscontext = NULL, *rootcontext = NULL;
 	int rc, num_mnt_opts = 0;
-
 	opts->num_mnt_opts = 0;
 
 	/* Standard string-based options. */
@@ -1234,6 +1236,13 @@ static int inode_doinit_with_dentry(struct inode *inode, struct dentry *opt_dent
 		goto out_unlock;
 
 	sbsec = inode->i_sb->s_security;
+	/* To prevent Null pointer exception */
+	if (!sbsec) {
+		printk(KERN_ERR "[SELinux] sbsec is NULL, inode->i_sb->s_security is already freed. \n");
+		rc = -EINVAL;
+		goto out_unlock;
+	}
+
 	if (!(sbsec->flags & SE_SBINITIALIZED)) {
 		/* Defer initialization until selinux_complete_init,
 		   after the initial policy is loaded and the security
@@ -1463,8 +1472,10 @@ static int task_has_perm(const struct task_struct *tsk1,
 	u32 sid1, sid2;
 
 	rcu_read_lock();
+
 	__tsec1 = __task_cred(tsk1)->security;	sid1 = __tsec1->sid;
 	__tsec2 = __task_cred(tsk2)->security;	sid2 = __tsec2->sid;
+
 	rcu_read_unlock();
 	return avc_has_perm(sid1, sid2, SECCLASS_PROCESS, perms, NULL);
 }
@@ -1556,6 +1567,11 @@ static int inode_has_perm(const struct cred *cred,
 	sid = cred_sid(cred);
 	isec = inode->i_security;
 
+	if (unlikely(!isec)){
+		printk(KERN_CRIT "[SELinux] isec is NULL, inode->i_security is already freed. \n");
+		return -EINVAL;
+	}
+
 	return avc_has_perm_flags(sid, isec->sid, isec->sclass, perms, adp, flags);
 }
 
@@ -1891,6 +1907,7 @@ static int selinux_binder_transfer_binder(struct task_struct *from, struct task_
 {
 	u32 fromsid = task_sid(from);
 	u32 tosid = task_sid(to);
+
 	return avc_has_perm(fromsid, tosid, SECCLASS_BINDER, BINDER__TRANSFER, NULL);
 }
 
@@ -2590,7 +2607,6 @@ static int selinux_mount(const char *dev_name,
 			 void *data)
 {
 	const struct cred *cred = current_cred();
-
 	if (flags & MS_REMOUNT)
 		return superblock_has_perm(cred, path->dentry->d_sb,
 					   FILESYSTEM__REMOUNT, NULL);
@@ -2786,6 +2802,25 @@ static int selinux_inode_permission(struct inode *inode, int mask)
 	sid = cred_sid(cred);
 	isec = inode->i_security;
 
+// [ SEC_SELINUX_PORTING COMMON
+	/* skip sid == 1(kernel), it means first boot time */
+	if(isec->initialized != 1 && sid != 1) {
+		int count = 5;
+
+		while(count-- > 0) {
+			printk(KERN_ERR "SELinux : inode->i_security is not initialized. waiting...(%d/5)\n", 5-count); 
+			udelay(500);
+			if(isec->initialized == 1) {
+				printk(KERN_ERR "SELinux : inode->i_security is INITIALIZED.\n"); 
+				break;
+			}
+		}
+		if(isec->initialized != 1) {
+			printk(KERN_ERR "SELinux : inode->i_security is not initialized. not fixed.\n"); 
+		}
+	}
+// ] SEC_SELINUX_PORTING COMMON
+
 	rc = avc_has_perm_noaudit(sid, isec->sid, isec->sclass, perms, 0, &avd);
 	audited = avc_audit_required(perms, &avd, rc,
 				     from_access ? FILE__AUDIT_ACCESS : 0,
@@ -2817,7 +2852,8 @@ static int selinux_inode_setattr(struct dentry *dentry, struct iattr *iattr)
 			ATTR_ATIME_SET | ATTR_MTIME_SET | ATTR_TIMES_SET))
 		return dentry_has_perm(cred, dentry, FILE__SETATTR);
 
-	if (selinux_policycap_openperm && (ia_valid & ATTR_SIZE))
+	if (selinux_policycap_openperm && (ia_valid & ATTR_SIZE)
+			&& !(ia_valid & ATTR_FILE))
 		av |= FILE__OPEN;
 
 	return dentry_has_perm(cred, dentry, av);
@@ -3049,6 +3085,7 @@ static int selinux_inode_setsecurity(struct inode *inode, const char *name,
 static int selinux_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size)
 {
 	const int len = sizeof(XATTR_NAME_SELINUX);
+
 	if (buffer && len <= buffer_size)
 		memcpy(buffer, XATTR_NAME_SELINUX, len);
 	return len;
@@ -3104,6 +3141,46 @@ static void selinux_file_free_security(struct file *file)
 	file_free_security(file);
 }
 
+/*
+ * Check whether a task has the ioctl permission and cmd
+ * operation to an inode.
+ */
+int ioctl_has_perm(const struct cred *cred, struct file *file,
+		u32 requested, u16 cmd)
+{
+	struct common_audit_data ad;
+	struct file_security_struct *fsec = file->f_security;
+	struct inode *inode = file_inode(file);
+	struct inode_security_struct *isec = inode->i_security;
+	struct lsm_ioctlop_audit ioctl;
+	u32 ssid = cred_sid(cred);
+	int rc;
+	u8 driver = cmd >> 8;
+	u8 xperm = cmd & 0xff;
+
+	ad.type = LSM_AUDIT_DATA_IOCTL_OP;
+	ad.u.op = &ioctl;
+	ad.u.op->cmd = cmd;
+	ad.u.op->path = file->f_path;
+
+	if (ssid != fsec->sid) {
+		rc = avc_has_perm(ssid, fsec->sid,
+				SECCLASS_FD,
+				FD__USE,
+				&ad);
+		if (rc)
+			goto out;
+	}
+
+	if (unlikely(IS_PRIVATE(inode)))
+		return 0;
+
+	rc = avc_has_extended_perms(ssid, isec->sid, isec->sclass,
+			requested, driver, xperm, &ad);
+out:
+	return rc;
+}
+
 static int selinux_file_ioctl(struct file *file, unsigned int cmd,
 			      unsigned long arg)
 {
@@ -3146,7 +3223,7 @@ static int selinux_file_ioctl(struct file *file, unsigned int cmd,
 	 * to the file's ioctl() function.
 	 */
 	default:
-		error = file_has_perm(cred, file, FILE__IOCTL);
+		error = ioctl_has_perm(cred, file, FILE__IOCTL, (u16) cmd);
 	}
 	return error;
 }
@@ -3526,7 +3603,6 @@ static int selinux_task_setnice(struct task_struct *p, int nice)
 static int selinux_task_setioprio(struct task_struct *p, int ioprio)
 {
 	int rc;
-
 	rc = cap_task_setioprio(p, ioprio);
 	if (rc)
 		return rc;
@@ -3885,6 +3961,11 @@ static int sock_has_perm(struct task_struct *task, struct sock *sk, u32 perms)
 	struct lsm_network_audit net = {0,};
 	u32 tsid = task_sid(task);
 
+	if (unlikely(!sksec)){
+		printk(KERN_CRIT "[SELinux] sksec is NULL, socket is already freed. \n");
+		return -EINVAL;
+	}
+
 	if (sksec->sid == SECINITSID_KERNEL)
 		return 0;
 
@@ -5647,6 +5728,7 @@ static int selinux_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen)
 static int selinux_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen)
 {
 	int len = 0;
+
 	len = selinux_inode_getsecurity(inode, XATTR_SELINUX_SUFFIX,
 						ctx, true);
 	if (len < 0)
@@ -6032,7 +6114,6 @@ static struct nf_hook_ops selinux_ipv6_ops[] = {
 static int __init selinux_nf_ip_init(void)
 {
 	int err = 0;
-
 	if (!selinux_enabled)
 		goto out;
 
diff --git a/security/selinux/include/avc.h b/security/selinux/include/avc.h
index 28a08a891704..768423c696b2 100644
--- a/security/selinux/include/avc.h
+++ b/security/selinux/include/avc.h
@@ -141,7 +141,8 @@ static inline int avc_audit(u32 ssid, u32 tsid,
 			      a, flags);
 }
 
-#define AVC_STRICT 1 /* Ignore permissive mode. */
+#define AVC_STRICT 0
+#define AVC_EXTENDED_PERMS 2	/* update extended permissions */
 int avc_has_perm_noaudit(u32 ssid, u32 tsid,
 			 u16 tclass, u32 requested,
 			 unsigned flags,
@@ -159,6 +160,9 @@ static inline int avc_has_perm(u32 ssid, u32 tsid,
 	return avc_has_perm_flags(ssid, tsid, tclass, requested, auditdata, 0);
 }
 
+int avc_has_extended_perms(u32 ssid, u32 tsid, u16 tclass, u32 requested,
+		u8 driver, u8 perm, struct common_audit_data *ad);
+
 u32 avc_policy_seqno(void);
 
 #define AVC_CALLBACK_GRANT		1
@@ -169,6 +173,7 @@ u32 avc_policy_seqno(void);
 #define AVC_CALLBACK_AUDITALLOW_DISABLE	32
 #define AVC_CALLBACK_AUDITDENY_ENABLE	64
 #define AVC_CALLBACK_AUDITDENY_DISABLE	128
+#define AVC_CALLBACK_ADD_XPERMS		256
 
 int avc_add_callback(int (*callback)(u32 event), u32 events);
 
@@ -184,4 +189,3 @@ DECLARE_PER_CPU(struct avc_cache_stats, avc_cache_stats);
 #endif
 
 #endif /* _SELINUX_AVC_H_ */
-
diff --git a/security/selinux/include/security.h b/security/selinux/include/security.h
index 6d3885165d14..eb25aa9fb313 100644
--- a/security/selinux/include/security.h
+++ b/security/selinux/include/security.h
@@ -33,13 +33,15 @@
 #define POLICYDB_VERSION_ROLETRANS	26
 #define POLICYDB_VERSION_NEW_OBJECT_DEFAULTS	27
 #define POLICYDB_VERSION_DEFAULT_TYPE	28
+#define POLICYDB_VERSION_CONSTRAINT_NAMES	29
+#define POLICYDB_VERSION_XPERMS_IOCTL	30
 
 /* Range of policy versions we understand*/
 #define POLICYDB_VERSION_MIN   POLICYDB_VERSION_BASE
 #ifdef CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX
 #define POLICYDB_VERSION_MAX	CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX_VALUE
 #else
-#define POLICYDB_VERSION_MAX	POLICYDB_VERSION_DEFAULT_TYPE
+#define POLICYDB_VERSION_MAX	POLICYDB_VERSION_XPERMS_IOCTL
 #endif
 
 /* Mask for just the mount related flags */
@@ -102,11 +104,38 @@ struct av_decision {
 	u32 flags;
 };
 
+#define XPERMS_ALLOWED 1
+#define XPERMS_AUDITALLOW 2
+#define XPERMS_DONTAUDIT 4
+
+#define security_xperm_set(perms, x) (perms[x >> 5] |= 1 << (x & 0x1f))
+#define security_xperm_test(perms, x) (1 & (perms[x >> 5] >> (x & 0x1f)))
+struct extended_perms_data {
+	u32 p[8];
+};
+
+struct extended_perms_decision {
+	u8 used;
+	u8 driver;
+	struct extended_perms_data *allowed;
+	struct extended_perms_data *auditallow;
+	struct extended_perms_data *dontaudit;
+};
+
+struct extended_perms {
+	u16 len;	/* length associated decision chain */
+	struct extended_perms_data drivers; /* flag drivers that are used */
+};
+
 /* definitions of av_decision.flags */
 #define AVD_FLAGS_PERMISSIVE	0x0001
 
 void security_compute_av(u32 ssid, u32 tsid,
-			 u16 tclass, struct av_decision *avd);
+			 u16 tclass, struct av_decision *avd,
+			 struct extended_perms *xperms);
+
+void security_compute_xperms_decision(u32 ssid, u32 tsid, u16 tclass,
+			 u8 driver, struct extended_perms_decision *xpermd);
 
 void security_compute_av_user(u32 ssid, u32 tsid,
 			     u16 tclass, struct av_decision *avd);
diff --git a/security/selinux/nlmsgtab.c b/security/selinux/nlmsgtab.c
index 855e464e92ef..7ccc48599b79 100644
--- a/security/selinux/nlmsgtab.c
+++ b/security/selinux/nlmsgtab.c
@@ -17,6 +17,7 @@
 #include <linux/inet_diag.h>
 #include <linux/xfrm.h>
 #include <linux/audit.h>
+#include <linux/sock_diag.h>
 
 #include "flask.h"
 #include "av_permissions.h"
@@ -76,8 +77,9 @@ static struct nlmsg_perm nlmsg_route_perms[] =
 
 static struct nlmsg_perm nlmsg_tcpdiag_perms[] =
 {
-	{ TCPDIAG_GETSOCK,	NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
-	{ DCCPDIAG_GETSOCK,	NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
+	{ TCPDIAG_GETSOCK,		NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
+	{ DCCPDIAG_GETSOCK,		NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
+	{ SOCK_DIAG_BY_FAMILY,		NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
 };
 
 static struct nlmsg_perm nlmsg_xfrm_perms[] =
diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c
index a96bed4db3e8..e94a8d8313bc 100644
--- a/security/selinux/selinuxfs.c
+++ b/security/selinux/selinuxfs.c
@@ -41,6 +41,10 @@
 #include "objsec.h"
 #include "conditional.h"
 
+#if defined(CONFIG_TZ_ICCC)
+#include <linux/security/Iccc_Interface.h>
+#endif
+
 /* Policy capability filenames */
 static char *policycap_names[] = {
 	"network_peer_controls",
@@ -183,6 +187,20 @@ static ssize_t sel_write_enforce(struct file *file, const char __user *buf,
 		selinux_status_update_setenforce(selinux_enforcing);
 	}
 	length = count;
+	
+#if defined(CONFIG_TZ_ICCC)
+	if (selinux_enabled && selinux_enforcing) {
+		if (0 != Iccc_SaveData_Kernel(SELINUX_STATUS,0x0)) {
+			printk(KERN_ERR "%s: Iccc_SaveData_Kernel failed, type = %x, value =%x\n", __func__,SELINUX_STATUS,0x0);
+		}
+	}
+	else {
+		if (0 != Iccc_SaveData_Kernel(SELINUX_STATUS,0x1)) {
+			printk(KERN_ERR "%s: Iccc_SaveData_Kernel failed, type = %x, value =%x\n", __func__,SELINUX_STATUS,0x1);
+		}
+	}
+#endif
+
 out:
 	free_page((unsigned long) page);
 	return length;
diff --git a/security/selinux/ss/avtab.c b/security/selinux/ss/avtab.c
index a3dd9faa19c0..640c16b9d3fb 100644
--- a/security/selinux/ss/avtab.c
+++ b/security/selinux/ss/avtab.c
@@ -24,6 +24,7 @@
 #include "policydb.h"
 
 static struct kmem_cache *avtab_node_cachep;
+static struct kmem_cache *avtab_xperms_cachep;
 
 static inline int avtab_hash(struct avtab_key *keyp, u16 mask)
 {
@@ -37,11 +38,24 @@ avtab_insert_node(struct avtab *h, int hvalue,
 		  struct avtab_key *key, struct avtab_datum *datum)
 {
 	struct avtab_node *newnode;
+	struct avtab_extended_perms *xperms;
 	newnode = kmem_cache_zalloc(avtab_node_cachep, GFP_KERNEL);
 	if (newnode == NULL)
 		return NULL;
 	newnode->key = *key;
-	newnode->datum = *datum;
+
+	if (key->specified & AVTAB_XPERMS) {
+		xperms = kmem_cache_zalloc(avtab_xperms_cachep, GFP_KERNEL);
+		if (xperms == NULL) {
+			kmem_cache_free(avtab_node_cachep, newnode);
+			return NULL;
+		}
+		*xperms = *(datum->u.xperms);
+		newnode->datum.u.xperms = xperms;
+	} else {
+		newnode->datum.u.data = datum->u.data;
+	}
+
 	if (prev) {
 		newnode->next = prev->next;
 		prev->next = newnode;
@@ -70,8 +84,12 @@ static int avtab_insert(struct avtab *h, struct avtab_key *key, struct avtab_dat
 		if (key->source_type == cur->key.source_type &&
 		    key->target_type == cur->key.target_type &&
 		    key->target_class == cur->key.target_class &&
-		    (specified & cur->key.specified))
+		    (specified & cur->key.specified)) {
+			/* extended perms may not be unique */
+			if (specified & AVTAB_XPERMS)
+				break;
 			return -EEXIST;
+		}
 		if (key->source_type < cur->key.source_type)
 			break;
 		if (key->source_type == cur->key.source_type &&
@@ -232,6 +250,9 @@ void avtab_destroy(struct avtab *h)
 		while (cur) {
 			temp = cur;
 			cur = cur->next;
+			if (temp->key.specified & AVTAB_XPERMS)
+				kmem_cache_free(avtab_xperms_cachep,
+						temp->datum.u.xperms);
 			kmem_cache_free(avtab_node_cachep, temp);
 		}
 		h->htable[i] = NULL;
@@ -314,13 +335,42 @@ void avtab_hash_eval(struct avtab *h, char *tag)
 	       chain2_len_sum);
 }
 
+/*
+ * extended permissions compatibility. Make ToT Android kernels compatible
+ * with Android M releases
+ */
+#define AVTAB_OPTYPE_ALLOWED	0x1000
+#define AVTAB_OPTYPE_AUDITALLOW	0x2000
+#define AVTAB_OPTYPE_DONTAUDIT	0x4000
+#define AVTAB_OPTYPE		(AVTAB_OPTYPE_ALLOWED | \
+				AVTAB_OPTYPE_AUDITALLOW | \
+				AVTAB_OPTYPE_DONTAUDIT)
+#define AVTAB_XPERMS_OPTYPE	4
+
+#define avtab_xperms_to_optype(x) (x << AVTAB_XPERMS_OPTYPE)
+#define avtab_optype_to_xperms(x) (x >> AVTAB_XPERMS_OPTYPE)
+
+static unsigned int avtab_android_m_compat;
+
+static void avtab_android_m_compat_set(void)
+{
+	if (!avtab_android_m_compat) {
+		pr_info("SELinux:  Android master kernel running Android"
+				" M policy in compatibility mode.\n");
+		avtab_android_m_compat = 1;
+	}
+}
+
 static uint16_t spec_order[] = {
 	AVTAB_ALLOWED,
 	AVTAB_AUDITDENY,
 	AVTAB_AUDITALLOW,
 	AVTAB_TRANSITION,
 	AVTAB_CHANGE,
-	AVTAB_MEMBER
+	AVTAB_MEMBER,
+	AVTAB_XPERMS_ALLOWED,
+	AVTAB_XPERMS_AUDITALLOW,
+	AVTAB_XPERMS_DONTAUDIT
 };
 
 int avtab_read_item(struct avtab *a, void *fp, struct policydb *pol,
@@ -330,10 +380,12 @@ int avtab_read_item(struct avtab *a, void *fp, struct policydb *pol,
 {
 	__le16 buf16[4];
 	u16 enabled;
-	__le32 buf32[7];
 	u32 items, items2, val, vers = pol->policyvers;
 	struct avtab_key key;
 	struct avtab_datum datum;
+	struct avtab_extended_perms xperms;
+	__le32 buf32[ARRAY_SIZE(xperms.perms.p)];
+	unsigned int android_m_compat_optype = 0;
 	int i, rc;
 	unsigned set;
 
@@ -390,11 +442,15 @@ int avtab_read_item(struct avtab *a, void *fp, struct policydb *pol,
 			printk(KERN_ERR "SELinux: avtab: entry has both access vectors and types\n");
 			return -EINVAL;
 		}
+		if (val & AVTAB_XPERMS) {
+			printk(KERN_ERR "SELinux: avtab: entry has extended permissions\n");
+			return -EINVAL;
+		}
 
 		for (i = 0; i < ARRAY_SIZE(spec_order); i++) {
 			if (val & spec_order[i]) {
 				key.specified = spec_order[i] | enabled;
-				datum.data = le32_to_cpu(buf32[items++]);
+				datum.u.data = le32_to_cpu(buf32[items++]);
 				rc = insertf(a, &key, &datum, p);
 				if (rc)
 					return rc;
@@ -420,6 +476,13 @@ int avtab_read_item(struct avtab *a, void *fp, struct policydb *pol,
 	key.target_class = le16_to_cpu(buf16[items++]);
 	key.specified = le16_to_cpu(buf16[items++]);
 
+	if ((key.specified & AVTAB_OPTYPE) &&
+			(vers == POLICYDB_VERSION_XPERMS_IOCTL)) {
+		key.specified = avtab_optype_to_xperms(key.specified);
+		android_m_compat_optype = 1;
+		avtab_android_m_compat_set();
+	}
+
 	if (!policydb_type_isvalid(pol, key.source_type) ||
 	    !policydb_type_isvalid(pol, key.target_type) ||
 	    !policydb_class_isvalid(pol, key.target_class)) {
@@ -437,14 +500,54 @@ int avtab_read_item(struct avtab *a, void *fp, struct policydb *pol,
 		return -EINVAL;
 	}
 
-	rc = next_entry(buf32, fp, sizeof(u32));
-	if (rc) {
-		printk(KERN_ERR "SELinux: avtab: truncated entry\n");
-		return rc;
+	if ((vers < POLICYDB_VERSION_XPERMS_IOCTL) &&
+			(key.specified & AVTAB_XPERMS)) {
+		printk(KERN_ERR "SELinux:  avtab:  policy version %u does not "
+				"support extended permissions rules and one "
+				"was specified\n", vers);
+		return -EINVAL;
+	} else if (key.specified & AVTAB_XPERMS) {
+		memset(&xperms, 0, sizeof(struct avtab_extended_perms));
+		rc = next_entry(&xperms.specified, fp, sizeof(u8));
+		if (rc) {
+			printk(KERN_ERR "SELinux: avtab: truncated entry\n");
+			return rc;
+		}
+		if (avtab_android_m_compat ||
+			    ((xperms.specified != AVTAB_XPERMS_IOCTLFUNCTION) &&
+			    (xperms.specified != AVTAB_XPERMS_IOCTLDRIVER) &&
+			    (vers == POLICYDB_VERSION_XPERMS_IOCTL))) {
+			xperms.driver = xperms.specified;
+			if (android_m_compat_optype)
+				xperms.specified = AVTAB_XPERMS_IOCTLDRIVER;
+			else
+				xperms.specified = AVTAB_XPERMS_IOCTLFUNCTION;
+			avtab_android_m_compat_set();
+		} else {
+			rc = next_entry(&xperms.driver, fp, sizeof(u8));
+			if (rc) {
+				printk(KERN_ERR "SELinux: avtab: truncated entry\n");
+				return rc;
+			}
+		}
+		rc = next_entry(buf32, fp, sizeof(u32)*ARRAY_SIZE(xperms.perms.p));
+		if (rc) {
+			printk(KERN_ERR "SELinux: avtab: truncated entry\n");
+			return rc;
+		}
+		for (i = 0; i < ARRAY_SIZE(xperms.perms.p); i++)
+			xperms.perms.p[i] = le32_to_cpu(buf32[i]);
+		datum.u.xperms = &xperms;
+	} else {
+		rc = next_entry(buf32, fp, sizeof(u32));
+		if (rc) {
+			printk(KERN_ERR "SELinux: avtab: truncated entry\n");
+			return rc;
+		}
+		datum.u.data = le32_to_cpu(*buf32);
 	}
-	datum.data = le32_to_cpu(*buf32);
 	if ((key.specified & AVTAB_TYPE) &&
-	    !policydb_type_isvalid(pol, datum.data)) {
+	    !policydb_type_isvalid(pol, datum.u.data)) {
 		printk(KERN_ERR "SELinux: avtab: invalid type\n");
 		return -EINVAL;
 	}
@@ -504,18 +607,40 @@ bad:
 int avtab_write_item(struct policydb *p, struct avtab_node *cur, void *fp)
 {
 	__le16 buf16[4];
-	__le32 buf32[1];
+	__le32 buf32[ARRAY_SIZE(cur->datum.u.xperms->perms.p)];
 	int rc;
+	unsigned int i;
 
 	buf16[0] = cpu_to_le16(cur->key.source_type);
 	buf16[1] = cpu_to_le16(cur->key.target_type);
 	buf16[2] = cpu_to_le16(cur->key.target_class);
-	buf16[3] = cpu_to_le16(cur->key.specified);
+	if (avtab_android_m_compat && (cur->key.specified & AVTAB_XPERMS) &&
+		    (cur->datum.u.xperms->specified == AVTAB_XPERMS_IOCTLDRIVER))
+		buf16[3] = cpu_to_le16(avtab_xperms_to_optype(cur->key.specified));
+	else
+		buf16[3] = cpu_to_le16(cur->key.specified);
 	rc = put_entry(buf16, sizeof(u16), 4, fp);
 	if (rc)
 		return rc;
-	buf32[0] = cpu_to_le32(cur->datum.data);
-	rc = put_entry(buf32, sizeof(u32), 1, fp);
+
+	if (cur->key.specified & AVTAB_XPERMS) {
+		if (avtab_android_m_compat == 0) {
+			rc = put_entry(&cur->datum.u.xperms->specified,
+					sizeof(u8), 1, fp);
+			if (rc)
+				return rc;
+		}
+		rc = put_entry(&cur->datum.u.xperms->driver, sizeof(u8), 1, fp);
+		if (rc)
+			return rc;
+		for (i = 0; i < ARRAY_SIZE(cur->datum.u.xperms->perms.p); i++)
+			buf32[i] = cpu_to_le32(cur->datum.u.xperms->perms.p[i]);
+		rc = put_entry(buf32, sizeof(u32),
+				ARRAY_SIZE(cur->datum.u.xperms->perms.p), fp);
+	} else {
+		buf32[0] = cpu_to_le32(cur->datum.u.data);
+		rc = put_entry(buf32, sizeof(u32), 1, fp);
+	}
 	if (rc)
 		return rc;
 	return 0;
@@ -548,9 +673,13 @@ void avtab_cache_init(void)
 	avtab_node_cachep = kmem_cache_create("avtab_node",
 					      sizeof(struct avtab_node),
 					      0, SLAB_PANIC, NULL);
+	avtab_xperms_cachep = kmem_cache_create("avtab_extended_perms",
+						sizeof(struct avtab_extended_perms),
+						0, SLAB_PANIC, NULL);
 }
 
 void avtab_cache_destroy(void)
 {
 	kmem_cache_destroy(avtab_node_cachep);
+	kmem_cache_destroy(avtab_xperms_cachep);
 }
diff --git a/security/selinux/ss/avtab.h b/security/selinux/ss/avtab.h
index 63ce2f9e441d..8133523ca679 100644
--- a/security/selinux/ss/avtab.h
+++ b/security/selinux/ss/avtab.h
@@ -23,6 +23,8 @@
 #ifndef _SS_AVTAB_H_
 #define _SS_AVTAB_H_
 
+#include "security.h"
+
 struct avtab_key {
 	u16 source_type;	/* source type */
 	u16 target_type;	/* target type */
@@ -35,13 +37,43 @@ struct avtab_key {
 #define AVTAB_MEMBER		0x0020
 #define AVTAB_CHANGE		0x0040
 #define AVTAB_TYPE		(AVTAB_TRANSITION | AVTAB_MEMBER | AVTAB_CHANGE)
+/* extended permissions */
+#define AVTAB_XPERMS_ALLOWED	0x0100
+#define AVTAB_XPERMS_AUDITALLOW	0x0200
+#define AVTAB_XPERMS_DONTAUDIT	0x0400
+#define AVTAB_XPERMS		(AVTAB_XPERMS_ALLOWED | \
+				AVTAB_XPERMS_AUDITALLOW | \
+				AVTAB_XPERMS_DONTAUDIT)
 #define AVTAB_ENABLED_OLD   0x80000000 /* reserved for used in cond_avtab */
 #define AVTAB_ENABLED		0x8000 /* reserved for used in cond_avtab */
 	u16 specified;	/* what field is specified */
 };
 
+/*
+ * For operations that require more than the 32 permissions provided by the avc
+ * extended permissions may be used to provide 256 bits of permissions.
+ */
+struct avtab_extended_perms {
+/* These are not flags. All 256 values may be used */
+#define AVTAB_XPERMS_IOCTLFUNCTION	0x01
+#define AVTAB_XPERMS_IOCTLDRIVER	0x02
+	/* extension of the avtab_key specified */
+	u8 specified; /* ioctl, netfilter, ... */
+	/*
+	 * if 256 bits is not adequate as is often the case with ioctls, then
+	 * multiple extended perms may be used and the driver field
+	 * specifies which permissions are included.
+	 */
+	u8 driver;
+	/* 256 bits of permissions */
+	struct extended_perms_data perms;
+};
+
 struct avtab_datum {
-	u32 data; /* access vector or type value */
+	union {
+		u32 data; /* access vector or type value */
+		struct avtab_extended_perms *xperms;
+	} u;
 };
 
 struct avtab_node {
diff --git a/security/selinux/ss/conditional.c b/security/selinux/ss/conditional.c
index 377d148e7157..ba7dd9366104 100644
--- a/security/selinux/ss/conditional.c
+++ b/security/selinux/ss/conditional.c
@@ -15,6 +15,7 @@
 
 #include "security.h"
 #include "conditional.h"
+#include "services.h"
 
 /*
  * cond_evaluate_expr evaluates a conditional expr
@@ -617,10 +618,28 @@ int cond_write_list(struct policydb *p, struct cond_node *list, void *fp)
 
 	return 0;
 }
+
+void cond_compute_xperms(struct avtab *ctab, struct avtab_key *key,
+		struct extended_perms_decision *xpermd)
+{
+	struct avtab_node *node;
+
+	if (!ctab || !key || !xpermd)
+		return;
+
+	for (node = avtab_search_node(ctab, key); node;
+			node = avtab_search_node_next(node, key->specified)) {
+		if (node->key.specified & AVTAB_ENABLED)
+			services_compute_xperms_decision(xpermd, node);
+	}
+	return;
+
+}
 /* Determine whether additional permissions are granted by the conditional
  * av table, and if so, add them to the result
  */
-void cond_compute_av(struct avtab *ctab, struct avtab_key *key, struct av_decision *avd)
+void cond_compute_av(struct avtab *ctab, struct avtab_key *key,
+		struct av_decision *avd, struct extended_perms *xperms)
 {
 	struct avtab_node *node;
 
@@ -631,7 +650,7 @@ void cond_compute_av(struct avtab *ctab, struct avtab_key *key, struct av_decisi
 				node = avtab_search_node_next(node, key->specified)) {
 		if ((u16)(AVTAB_ALLOWED|AVTAB_ENABLED) ==
 		    (node->key.specified & (AVTAB_ALLOWED|AVTAB_ENABLED)))
-			avd->allowed |= node->datum.data;
+			avd->allowed |= node->datum.u.data;
 		if ((u16)(AVTAB_AUDITDENY|AVTAB_ENABLED) ==
 		    (node->key.specified & (AVTAB_AUDITDENY|AVTAB_ENABLED)))
 			/* Since a '0' in an auditdeny mask represents a
@@ -639,10 +658,13 @@ void cond_compute_av(struct avtab *ctab, struct avtab_key *key, struct av_decisi
 			 * the '&' operand to ensure that all '0's in the mask
 			 * are retained (much unlike the allow and auditallow cases).
 			 */
-			avd->auditdeny &= node->datum.data;
+			avd->auditdeny &= node->datum.u.data;
 		if ((u16)(AVTAB_AUDITALLOW|AVTAB_ENABLED) ==
 		    (node->key.specified & (AVTAB_AUDITALLOW|AVTAB_ENABLED)))
-			avd->auditallow |= node->datum.data;
+			avd->auditallow |= node->datum.u.data;
+		if (xperms && (node->key.specified & AVTAB_ENABLED) &&
+				(node->key.specified & AVTAB_XPERMS))
+			services_compute_xperms_drivers(xperms, node);
 	}
 	return;
 }
diff --git a/security/selinux/ss/conditional.h b/security/selinux/ss/conditional.h
index 4d1f87466508..ddb43e7e1c75 100644
--- a/security/selinux/ss/conditional.h
+++ b/security/selinux/ss/conditional.h
@@ -73,8 +73,10 @@ int cond_read_list(struct policydb *p, void *fp);
 int cond_write_bool(void *key, void *datum, void *ptr);
 int cond_write_list(struct policydb *p, struct cond_node *list, void *fp);
 
-void cond_compute_av(struct avtab *ctab, struct avtab_key *key, struct av_decision *avd);
-
+void cond_compute_av(struct avtab *ctab, struct avtab_key *key,
+		struct av_decision *avd, struct extended_perms *xperms);
+void cond_compute_xperms(struct avtab *ctab, struct avtab_key *key,
+		struct extended_perms_decision *xpermd);
 int evaluate_cond_node(struct policydb *p, struct cond_node *node);
 
 #endif /* _CONDITIONAL_H_ */
diff --git a/security/selinux/ss/constraint.h b/security/selinux/ss/constraint.h
index 149dda731fd3..96fd947c494b 100644
--- a/security/selinux/ss/constraint.h
+++ b/security/selinux/ss/constraint.h
@@ -48,6 +48,7 @@ struct constraint_expr {
 	u32 op;			/* operator */
 
 	struct ebitmap names;	/* names */
+	struct type_set *type_names;
 
 	struct constraint_expr *next;   /* next expression */
 };
diff --git a/security/selinux/ss/policydb.c b/security/selinux/ss/policydb.c
index bcdca73033f3..8a07ac6416b3 100644
--- a/security/selinux/ss/policydb.c
+++ b/security/selinux/ss/policydb.c
@@ -143,6 +143,16 @@ static struct policydb_compat_info policydb_compat[] = {
 		.sym_num	= SYM_NUM,
 		.ocon_num	= OCON_NUM,
 	},
+	{
+		.version	= POLICYDB_VERSION_CONSTRAINT_NAMES,
+		.sym_num	= SYM_NUM,
+		.ocon_num	= OCON_NUM,
+	},
+	{
+		.version	= POLICYDB_VERSION_XPERMS_IOCTL,
+		.sym_num	= SYM_NUM,
+		.ocon_num	= OCON_NUM,
+	},
 };
 
 static struct policydb_compat_info *policydb_lookup_compat(int version)
@@ -613,6 +623,20 @@ static int common_destroy(void *key, void *datum, void *p)
 	return 0;
 }
 
+
+static void constraint_expr_destroy(struct constraint_expr *expr)
+{
+	if (expr) {
+		ebitmap_destroy(&expr->names);
+		if (expr->type_names) {
+			ebitmap_destroy(&expr->type_names->types);
+			ebitmap_destroy(&expr->type_names->negset);
+			kfree(expr->type_names);
+		}
+		kfree(expr);
+	}
+}
+
 static int cls_destroy(void *key, void *datum, void *p)
 {
 	struct class_datum *cladatum;
@@ -628,10 +652,9 @@ static int cls_destroy(void *key, void *datum, void *p)
 		while (constraint) {
 			e = constraint->expr;
 			while (e) {
-				ebitmap_destroy(&e->names);
 				etmp = e;
 				e = e->next;
-				kfree(etmp);
+				constraint_expr_destroy(etmp);
 			}
 			ctemp = constraint;
 			constraint = constraint->next;
@@ -642,16 +665,14 @@ static int cls_destroy(void *key, void *datum, void *p)
 		while (constraint) {
 			e = constraint->expr;
 			while (e) {
-				ebitmap_destroy(&e->names);
 				etmp = e;
 				e = e->next;
-				kfree(etmp);
+				constraint_expr_destroy(etmp);
 			}
 			ctemp = constraint;
 			constraint = constraint->next;
 			kfree(ctemp);
 		}
-
 		kfree(cladatum->comkey);
 	}
 	kfree(datum);
@@ -1156,8 +1177,34 @@ bad:
 	return rc;
 }
 
-static int read_cons_helper(struct constraint_node **nodep, int ncons,
-			    int allowxtarget, void *fp)
+static void type_set_init(struct type_set *t)
+{
+	ebitmap_init(&t->types);
+	ebitmap_init(&t->negset);
+}
+
+static int type_set_read(struct type_set *t, void *fp)
+{
+	__le32 buf[1];
+	int rc;
+
+	if (ebitmap_read(&t->types, fp))
+		return -EINVAL;
+	if (ebitmap_read(&t->negset, fp))
+		return -EINVAL;
+
+	rc = next_entry(buf, fp, sizeof(u32));
+	if (rc < 0)
+		return -EINVAL;
+	t->flags = le32_to_cpu(buf[0]);
+
+	return 0;
+}
+
+
+static int read_cons_helper(struct policydb *p,
+				struct constraint_node **nodep,
+				int ncons, int allowxtarget, void *fp)
 {
 	struct constraint_node *c, *lc;
 	struct constraint_expr *e, *le;
@@ -1225,6 +1272,18 @@ static int read_cons_helper(struct constraint_node **nodep, int ncons,
 				rc = ebitmap_read(&e->names, fp);
 				if (rc)
 					return rc;
+				if (p->policyvers >=
+					POLICYDB_VERSION_CONSTRAINT_NAMES) {
+						e->type_names = kzalloc(sizeof
+						(*e->type_names),
+						GFP_KERNEL);
+					if (!e->type_names)
+						return -ENOMEM;
+					type_set_init(e->type_names);
+					rc = type_set_read(e->type_names, fp);
+					if (rc)
+						return rc;
+				}
 				break;
 			default:
 				return -EINVAL;
@@ -1301,7 +1360,7 @@ static int class_read(struct policydb *p, struct hashtab *h, void *fp)
 			goto bad;
 	}
 
-	rc = read_cons_helper(&cladatum->constraints, ncons, 0, fp);
+	rc = read_cons_helper(p, &cladatum->constraints, ncons, 0, fp);
 	if (rc)
 		goto bad;
 
@@ -1311,7 +1370,8 @@ static int class_read(struct policydb *p, struct hashtab *h, void *fp)
 		if (rc)
 			goto bad;
 		ncons = le32_to_cpu(buf[0]);
-		rc = read_cons_helper(&cladatum->validatetrans, ncons, 1, fp);
+		rc = read_cons_helper(p, &cladatum->validatetrans,
+				ncons, 1, fp);
 		if (rc)
 			goto bad;
 	}
@@ -1455,6 +1515,8 @@ static int type_read(struct policydb *p, struct hashtab *h, void *fp)
 		goto bad;
 	return 0;
 bad:
+	panic("SELinux:Failed to type read");
+
 	type_destroy(key, typdatum, NULL);
 	return rc;
 }
@@ -2505,6 +2567,8 @@ int policydb_read(struct policydb *p, void *fp)
 out:
 	return rc;
 bad:
+	panic("SELinux:Failed to load policy");
+
 	policydb_destroy(p);
 	goto out;
 }
@@ -2762,6 +2826,24 @@ static int common_write(void *vkey, void *datum, void *ptr)
 	return 0;
 }
 
+static int type_set_write(struct type_set *t, void *fp)
+{
+	int rc;
+	__le32 buf[1];
+
+	if (ebitmap_write(&t->types, fp))
+		return -EINVAL;
+	if (ebitmap_write(&t->negset, fp))
+		return -EINVAL;
+
+	buf[0] = cpu_to_le32(t->flags);
+	rc = put_entry(buf, sizeof(u32), 1, fp);
+	if (rc)
+		return -EINVAL;
+
+	return 0;
+}
+
 static int write_cons_helper(struct policydb *p, struct constraint_node *node,
 			     void *fp)
 {
@@ -2793,6 +2875,12 @@ static int write_cons_helper(struct policydb *p, struct constraint_node *node,
 				rc = ebitmap_write(&e->names, fp);
 				if (rc)
 					return rc;
+				if (p->policyvers >=
+					POLICYDB_VERSION_CONSTRAINT_NAMES) {
+					rc = type_set_write(e->type_names, fp);
+					if (rc)
+						return rc;
+				}
 				break;
 			default:
 				break;
diff --git a/security/selinux/ss/policydb.h b/security/selinux/ss/policydb.h
index da637471d4ce..725d5945a97e 100644
--- a/security/selinux/ss/policydb.h
+++ b/security/selinux/ss/policydb.h
@@ -153,6 +153,17 @@ struct cond_bool_datum {
 
 struct cond_node;
 
+/*
+ * type set preserves data needed to determine constraint info from
+ * policy source. This is not used by the kernel policy but allows
+ * utilities such as audit2allow to determine constraint denials.
+ */
+struct type_set {
+	struct ebitmap types;
+	struct ebitmap negset;
+	u32 flags;
+};
+
 /*
  * The configuration data includes security contexts for
  * initial SIDs, unlabeled file systems, TCP and UDP port numbers,
diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c
index 18caa16de27b..f0ff062b689b 100644
--- a/security/selinux/ss/services.c
+++ b/security/selinux/ss/services.c
@@ -92,9 +92,10 @@ static int context_struct_to_string(struct context *context, char **scontext,
 				    u32 *scontext_len);
 
 static void context_struct_compute_av(struct context *scontext,
-				      struct context *tcontext,
-				      u16 tclass,
-				      struct av_decision *avd);
+					struct context *tcontext,
+					u16 tclass,
+					struct av_decision *avd,
+					struct extended_perms *xperms);
 
 struct selinux_mapping {
 	u16 value; /* policy value */
@@ -564,7 +565,8 @@ static void type_attribute_bounds_av(struct context *scontext,
 		context_struct_compute_av(&lo_scontext,
 					  tcontext,
 					  tclass,
-					  &lo_avd);
+					  &lo_avd,
+					  NULL);
 		if ((lo_avd.allowed & avd->allowed) == avd->allowed)
 			return;		/* no masked permission */
 		masked = ~lo_avd.allowed & avd->allowed;
@@ -579,7 +581,8 @@ static void type_attribute_bounds_av(struct context *scontext,
 		context_struct_compute_av(scontext,
 					  &lo_tcontext,
 					  tclass,
-					  &lo_avd);
+					  &lo_avd,
+					  NULL);
 		if ((lo_avd.allowed & avd->allowed) == avd->allowed)
 			return;		/* no masked permission */
 		masked = ~lo_avd.allowed & avd->allowed;
@@ -595,7 +598,8 @@ static void type_attribute_bounds_av(struct context *scontext,
 		context_struct_compute_av(&lo_scontext,
 					  &lo_tcontext,
 					  tclass,
-					  &lo_avd);
+					  &lo_avd,
+					  NULL);
 		if ((lo_avd.allowed & avd->allowed) == avd->allowed)
 			return;		/* no masked permission */
 		masked = ~lo_avd.allowed & avd->allowed;
@@ -612,13 +616,39 @@ static void type_attribute_bounds_av(struct context *scontext,
 }
 
 /*
- * Compute access vectors based on a context structure pair for
- * the permissions in a particular class.
+ * flag which drivers have permissions
+ * only looking for ioctl based extended permssions
+ */
+void services_compute_xperms_drivers(
+		struct extended_perms *xperms,
+		struct avtab_node *node)
+{
+	unsigned int i;
+
+	if (node->datum.u.xperms->specified == AVTAB_XPERMS_IOCTLDRIVER) {
+		/* if one or more driver has all permissions allowed */
+		for (i = 0; i < ARRAY_SIZE(xperms->drivers.p); i++)
+			xperms->drivers.p[i] |= node->datum.u.xperms->perms.p[i];
+	} else if (node->datum.u.xperms->specified == AVTAB_XPERMS_IOCTLFUNCTION) {
+		/* if allowing permissions within a driver */
+		security_xperm_set(xperms->drivers.p,
+					node->datum.u.xperms->driver);
+	}
+
+	/* If no ioctl commands are allowed, ignore auditallow and auditdeny */
+	if (node->key.specified & AVTAB_XPERMS_ALLOWED)
+		xperms->len = 1;
+}
+
+/*
+ * Compute access vectors and extended permissions based on a context
+ * structure pair for the permissions in a particular class.
  */
 static void context_struct_compute_av(struct context *scontext,
-				      struct context *tcontext,
-				      u16 tclass,
-				      struct av_decision *avd)
+					struct context *tcontext,
+					u16 tclass,
+					struct av_decision *avd,
+					struct extended_perms *xperms)
 {
 	struct constraint_node *constraint;
 	struct role_allow *ra;
@@ -632,6 +662,10 @@ static void context_struct_compute_av(struct context *scontext,
 	avd->allowed = 0;
 	avd->auditallow = 0;
 	avd->auditdeny = 0xffffffff;
+	if (xperms) {
+		memset(&xperms->drivers, 0, sizeof(xperms->drivers));
+		xperms->len = 0;
+	}
 
 	if (unlikely(!tclass || tclass > policydb.p_classes.nprim)) {
 		if (printk_ratelimit())
@@ -646,7 +680,7 @@ static void context_struct_compute_av(struct context *scontext,
 	 * this permission check, then use it.
 	 */
 	avkey.target_class = tclass;
-	avkey.specified = AVTAB_AV;
+	avkey.specified = AVTAB_AV | AVTAB_XPERMS;
 	sattr = flex_array_get(policydb.type_attr_map_array, scontext->type - 1);
 	BUG_ON(!sattr);
 	tattr = flex_array_get(policydb.type_attr_map_array, tcontext->type - 1);
@@ -659,15 +693,18 @@ static void context_struct_compute_av(struct context *scontext,
 			     node;
 			     node = avtab_search_node_next(node, avkey.specified)) {
 				if (node->key.specified == AVTAB_ALLOWED)
-					avd->allowed |= node->datum.data;
+					avd->allowed |= node->datum.u.data;
 				else if (node->key.specified == AVTAB_AUDITALLOW)
-					avd->auditallow |= node->datum.data;
+					avd->auditallow |= node->datum.u.data;
 				else if (node->key.specified == AVTAB_AUDITDENY)
-					avd->auditdeny &= node->datum.data;
+					avd->auditdeny &= node->datum.u.data;
+				else if (xperms && (node->key.specified & AVTAB_XPERMS))
+					services_compute_xperms_drivers(xperms, node);
 			}
 
 			/* Check conditional av table for additional permissions */
-			cond_compute_av(&policydb.te_cond_avtab, &avkey, avd);
+			cond_compute_av(&policydb.te_cond_avtab, &avkey,
+					avd, xperms);
 
 		}
 	}
@@ -898,6 +935,139 @@ static void avd_init(struct av_decision *avd)
 	avd->flags = 0;
 }
 
+void services_compute_xperms_decision(struct extended_perms_decision *xpermd,
+					struct avtab_node *node)
+{
+	unsigned int i;
+
+	if (node->datum.u.xperms->specified == AVTAB_XPERMS_IOCTLFUNCTION) {
+		if (xpermd->driver != node->datum.u.xperms->driver)
+			return;
+	} else if (node->datum.u.xperms->specified == AVTAB_XPERMS_IOCTLDRIVER) {
+		if (!security_xperm_test(node->datum.u.xperms->perms.p,
+					xpermd->driver))
+			return;
+	} else {
+		BUG();
+	}
+
+	if (node->key.specified == AVTAB_XPERMS_ALLOWED) {
+		xpermd->used |= XPERMS_ALLOWED;
+		if (node->datum.u.xperms->specified == AVTAB_XPERMS_IOCTLDRIVER) {
+			memset(xpermd->allowed->p, 0xff,
+					sizeof(xpermd->allowed->p));
+		}
+		if (node->datum.u.xperms->specified == AVTAB_XPERMS_IOCTLFUNCTION) {
+			for (i = 0; i < ARRAY_SIZE(xpermd->allowed->p); i++)
+				xpermd->allowed->p[i] |=
+					node->datum.u.xperms->perms.p[i];
+		}
+	} else if (node->key.specified == AVTAB_XPERMS_AUDITALLOW) {
+		xpermd->used |= XPERMS_AUDITALLOW;
+		if (node->datum.u.xperms->specified == AVTAB_XPERMS_IOCTLDRIVER) {
+			memset(xpermd->auditallow->p, 0xff,
+					sizeof(xpermd->auditallow->p));
+		}
+		if (node->datum.u.xperms->specified == AVTAB_XPERMS_IOCTLFUNCTION) {
+			for (i = 0; i < ARRAY_SIZE(xpermd->auditallow->p); i++)
+				xpermd->auditallow->p[i] |=
+					node->datum.u.xperms->perms.p[i];
+		}
+	} else if (node->key.specified == AVTAB_XPERMS_DONTAUDIT) {
+		xpermd->used |= XPERMS_DONTAUDIT;
+		if (node->datum.u.xperms->specified == AVTAB_XPERMS_IOCTLDRIVER) {
+			memset(xpermd->dontaudit->p, 0xff,
+					sizeof(xpermd->dontaudit->p));
+		}
+		if (node->datum.u.xperms->specified == AVTAB_XPERMS_IOCTLFUNCTION) {
+			for (i = 0; i < ARRAY_SIZE(xpermd->dontaudit->p); i++)
+				xpermd->dontaudit->p[i] |=
+					node->datum.u.xperms->perms.p[i];
+		}
+	} else {
+		BUG();
+	}
+}
+
+void security_compute_xperms_decision(u32 ssid,
+				u32 tsid,
+				u16 orig_tclass,
+				u8 driver,
+				struct extended_perms_decision *xpermd)
+{
+	u16 tclass;
+	struct context *scontext, *tcontext;
+	struct avtab_key avkey;
+	struct avtab_node *node;
+	struct ebitmap *sattr, *tattr;
+	struct ebitmap_node *snode, *tnode;
+	unsigned int i, j;
+
+	xpermd->driver = driver;
+	xpermd->used = 0;
+	memset(xpermd->allowed->p, 0, sizeof(xpermd->allowed->p));
+	memset(xpermd->auditallow->p, 0, sizeof(xpermd->auditallow->p));
+	memset(xpermd->dontaudit->p, 0, sizeof(xpermd->dontaudit->p));
+
+	read_lock(&policy_rwlock);
+	if (!ss_initialized)
+		goto allow;
+
+	scontext = sidtab_search(&sidtab, ssid);
+	if (!scontext) {
+		printk(KERN_ERR "SELinux: %s:  unrecognized SID %d\n",
+		       __func__, ssid);
+		goto out;
+	}
+
+	tcontext = sidtab_search(&sidtab, tsid);
+	if (!tcontext) {
+		printk(KERN_ERR "SELinux: %s:  unrecognized SID %d\n",
+		       __func__, tsid);
+		goto out;
+	}
+
+	tclass = unmap_class(orig_tclass);
+	if (unlikely(orig_tclass && !tclass)) {
+		if (policydb.allow_unknown)
+			goto allow;
+		goto out;
+	}
+
+
+	if (unlikely(!tclass || tclass > policydb.p_classes.nprim)) {
+		pr_warn_ratelimited("SELinux:  Invalid class %hu\n", tclass);
+		goto out;
+	}
+
+	avkey.target_class = tclass;
+	avkey.specified = AVTAB_XPERMS;
+	sattr = flex_array_get(policydb.type_attr_map_array,
+				scontext->type - 1);
+	BUG_ON(!sattr);
+	tattr = flex_array_get(policydb.type_attr_map_array,
+				tcontext->type - 1);
+	BUG_ON(!tattr);
+	ebitmap_for_each_positive_bit(sattr, snode, i) {
+		ebitmap_for_each_positive_bit(tattr, tnode, j) {
+			avkey.source_type = i + 1;
+			avkey.target_type = j + 1;
+			for (node = avtab_search_node(&policydb.te_avtab, &avkey);
+			     node;
+			     node = avtab_search_node_next(node, avkey.specified))
+				services_compute_xperms_decision(xpermd, node);
+
+			cond_compute_xperms(&policydb.te_cond_avtab,
+						&avkey, xpermd);
+		}
+	}
+out:
+	read_unlock(&policy_rwlock);
+	return;
+allow:
+	memset(xpermd->allowed->p, 0xff, sizeof(xpermd->allowed->p));
+	goto out;
+}
 
 /**
  * security_compute_av - Compute access vector decisions.
@@ -905,6 +1075,7 @@ static void avd_init(struct av_decision *avd)
  * @tsid: target security identifier
  * @tclass: target security class
  * @avd: access vector decisions
+ * @xperms: extended permissions
  *
  * Compute a set of access vector decisions based on the
  * SID pair (@ssid, @tsid) for the permissions in @tclass.
@@ -912,13 +1083,15 @@ static void avd_init(struct av_decision *avd)
 void security_compute_av(u32 ssid,
 			 u32 tsid,
 			 u16 orig_tclass,
-			 struct av_decision *avd)
+			 struct av_decision *avd,
+			 struct extended_perms *xperms)
 {
 	u16 tclass;
 	struct context *scontext = NULL, *tcontext = NULL;
 
 	read_lock(&policy_rwlock);
 	avd_init(avd);
+	xperms->len = 0;
 	if (!ss_initialized)
 		goto allow;
 
@@ -946,7 +1119,7 @@ void security_compute_av(u32 ssid,
 			goto allow;
 		goto out;
 	}
-	context_struct_compute_av(scontext, tcontext, tclass, avd);
+	context_struct_compute_av(scontext, tcontext, tclass, avd, xperms);
 	map_decision(orig_tclass, avd, policydb.allow_unknown);
 out:
 	read_unlock(&policy_rwlock);
@@ -992,7 +1165,7 @@ void security_compute_av_user(u32 ssid,
 		goto out;
 	}
 
-	context_struct_compute_av(scontext, tcontext, tclass, avd);
+	context_struct_compute_av(scontext, tcontext, tclass, avd, NULL);
  out:
 	read_unlock(&policy_rwlock);
 	return;
@@ -1357,6 +1530,7 @@ out:
 	kfree(s);
 	kfree(t);
 	kfree(n);
+
 	if (!selinux_enforcing)
 		return 0;
 	return -EACCES;
@@ -1512,7 +1686,7 @@ static int security_compute_sid(u32 ssid,
 
 	if (avdatum) {
 		/* Use the type from the type transition/member/change rule. */
-		newcontext.type = avdatum->data;
+		newcontext.type = avdatum->u.data;
 	}
 
 	/* if we have a objname this is a file trans check so check those rules */
@@ -2262,7 +2436,7 @@ out:
 }
 
 /**
- * security_genfs_sid - Obtain a SID for a file in a filesystem
+ * __security_genfs_sid - Helper to obtain a SID for a file in a filesystem
  * @fstype: filesystem type
  * @path: path from root of mount
  * @sclass: file security class
@@ -2271,11 +2445,13 @@ out:
  * Obtain a SID to use for a file in a filesystem that
  * cannot support xattr or use a fixed labeling behavior like
  * transition SIDs or task SIDs.
+ *
+ * The caller must acquire the policy_rwlock before calling this function.
  */
-int security_genfs_sid(const char *fstype,
-		       char *path,
-		       u16 orig_sclass,
-		       u32 *sid)
+static inline int __security_genfs_sid(const char *fstype,
+				       char *path,
+				       u16 orig_sclass,
+				       u32 *sid)
 {
 	int len;
 	u16 sclass;
@@ -2286,8 +2462,6 @@ int security_genfs_sid(const char *fstype,
 	while (path[0] == '/' && path[1] == '/')
 		path++;
 
-	read_lock(&policy_rwlock);
-
 	sclass = unmap_class(orig_sclass);
 	*sid = SECINITSID_UNLABELED;
 
@@ -2321,10 +2495,32 @@ int security_genfs_sid(const char *fstype,
 	*sid = c->sid[0];
 	rc = 0;
 out:
-	read_unlock(&policy_rwlock);
 	return rc;
 }
 
+/**
+ * security_genfs_sid - Obtain a SID for a file in a filesystem
+ * @fstype: filesystem type
+ * @path: path from root of mount
+ * @sclass: file security class
+ * @sid: SID for path
+ *
+ * Acquire policy_rwlock before calling __security_genfs_sid() and release
+ * it afterward.
+ */
+int security_genfs_sid(const char *fstype,
+		       char *path,
+		       u16 orig_sclass,
+		       u32 *sid)
+{
+	int retval;
+
+	read_lock(&policy_rwlock);
+	retval = __security_genfs_sid(fstype, path, orig_sclass, sid);
+	read_unlock(&policy_rwlock);
+	return retval;
+}
+
 /**
  * security_fs_use - Determine how to handle labeling for a filesystem.
  * @fstype: filesystem type
@@ -2338,6 +2534,7 @@ int security_fs_use(
 {
 	int rc = 0;
 	struct ocontext *c;
+	u32 tmpsid;
 
 	read_lock(&policy_rwlock);
 
@@ -2352,13 +2549,15 @@ int security_fs_use(
 		*behavior = c->v.behavior;
 		if (!c->sid[0]) {
 			rc = sidtab_context_to_sid(&sidtab, &c->context[0],
-						   &c->sid[0]);
+						   &tmpsid);
+			c->sid[0] = tmpsid;
 			if (rc)
 				goto out;
 		}
 		*sid = c->sid[0];
 	} else {
-		rc = security_genfs_sid(fstype, "/", SECCLASS_DIR, sid);
+		rc = __security_genfs_sid(fstype, "/", SECCLASS_DIR,
+					sid);
 		if (rc) {
 			*behavior = SECURITY_FS_USE_NONE;
 			rc = 0;
diff --git a/security/selinux/ss/services.h b/security/selinux/ss/services.h
index e8d907e903cd..6abcd8729ec3 100644
--- a/security/selinux/ss/services.h
+++ b/security/selinux/ss/services.h
@@ -11,5 +11,11 @@
 
 extern struct policydb policydb;
 
+void services_compute_xperms_drivers(struct extended_perms *xperms,
+				struct avtab_node *node);
+
+void services_compute_xperms_decision(struct extended_perms_decision *xpermd,
+					struct avtab_node *node);
+
 #endif	/* _SS_SERVICES_H_ */
 
diff --git a/security/selinux/ss/status.c b/security/selinux/ss/status.c
index d982365f9d1a..7fee02c45d60 100644
--- a/security/selinux/ss/status.c
+++ b/security/selinux/ss/status.c
@@ -59,6 +59,7 @@ struct page *selinux_kernel_status_page(void)
 			status->version = SELINUX_KERNEL_STATUS_VERSION;
 			status->sequence = 0;
 			status->enforcing = selinux_enforcing;
+
 			/*
 			 * NOTE: the next policyload event shall set
 			 * a positive value on the status->policyload,