[PATCH] SELinux: convert to kzalloc

This patch converts SELinux code from kmalloc/memset to the new kazalloc
unction.  On i386, this results in a text saving of over 1K.

Before:
text    data     bss     dec     hex filename
86319    4642   15236  106197   19ed5 security/selinux/built-in.o

After:
text    data     bss     dec     hex filename
85278    4642   15236  105156   19ac4 security/selinux/built-in.o

Signed-off-by: James Morris <jmorris@namei.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

5 files changed, 30 insertions, 59 deletions

diff --git a/security/selinux/ss/conditional.c b/security/selinux/ss/conditional.c
index daf28800746..d2737edba54 100644
--- a/security/selinux/ss/conditional.c
+++ b/security/selinux/ss/conditional.c
@@ -220,10 +220,9 @@ int cond_read_bool(struct policydb *p, struct hashtab *h, void *fp)
 	u32 len;
 	int rc;
 
-	booldatum = kmalloc(sizeof(struct cond_bool_datum), GFP_KERNEL);
+	booldatum = kzalloc(sizeof(struct cond_bool_datum), GFP_KERNEL);
 	if (!booldatum)
 		return -1;
-	memset(booldatum, 0, sizeof(struct cond_bool_datum));
 
 	rc = next_entry(buf, fp, sizeof buf);
 	if (rc < 0)
@@ -321,10 +320,9 @@ static int cond_insertf(struct avtab *a, struct avtab_key *k, struct avtab_datum
 		goto err;
 	}
 
-	list = kmalloc(sizeof(struct cond_av_list), GFP_KERNEL);
+	list = kzalloc(sizeof(struct cond_av_list), GFP_KERNEL);
 	if (!list)
 		goto err;
-	memset(list, 0, sizeof(*list));
 
 	list->node = node_ptr;
 	if (!data->head)
@@ -414,11 +412,10 @@ static int cond_read_node(struct policydb *p, struct cond_node *node, void *fp)
 		if (rc < 0)
 			goto err;
 
-		expr = kmalloc(sizeof(struct cond_expr), GFP_KERNEL);
+		expr = kzalloc(sizeof(struct cond_expr), GFP_KERNEL);
 		if (!expr) {
 			goto err;
 		}
-		memset(expr, 0, sizeof(struct cond_expr));
 
 		expr->expr_type = le32_to_cpu(buf[0]);
 		expr->bool = le32_to_cpu(buf[1]);
@@ -460,10 +457,9 @@ int cond_read_list(struct policydb *p, void *fp)
 	len = le32_to_cpu(buf[0]);
 
 	for (i = 0; i < len; i++) {
-		node = kmalloc(sizeof(struct cond_node), GFP_KERNEL);
+		node = kzalloc(sizeof(struct cond_node), GFP_KERNEL);
 		if (!node)
 			goto err;
-		memset(node, 0, sizeof(struct cond_node));
 
 		if (cond_read_node(p, node, fp) != 0)
 			goto err;
diff --git a/security/selinux/ss/ebitmap.c b/security/selinux/ss/ebitmap.c
index d515154128c..47024a6e184 100644
--- a/security/selinux/ss/ebitmap.c
+++ b/security/selinux/ss/ebitmap.c
@@ -39,12 +39,11 @@ int ebitmap_cpy(struct ebitmap *dst, struct ebitmap *src)
 	n = src->node;
 	prev = NULL;
 	while (n) {
-		new = kmalloc(sizeof(*new), GFP_ATOMIC);
+		new = kzalloc(sizeof(*new), GFP_ATOMIC);
 		if (!new) {
 			ebitmap_destroy(dst);
 			return -ENOMEM;
 		}
-		memset(new, 0, sizeof(*new));
 		new->startbit = n->startbit;
 		new->map = n->map;
 		new->next = NULL;
@@ -150,10 +149,9 @@ int ebitmap_set_bit(struct ebitmap *e, unsigned long bit, int value)
 	if (!value)
 		return 0;
 
-	new = kmalloc(sizeof(*new), GFP_ATOMIC);
+	new = kzalloc(sizeof(*new), GFP_ATOMIC);
 	if (!new)
 		return -ENOMEM;
-	memset(new, 0, sizeof(*new));
 
 	new->startbit = bit & ~(MAPSIZE - 1);
 	new->map = (MAPBIT << (bit - new->startbit));
@@ -232,13 +230,12 @@ int ebitmap_read(struct ebitmap *e, void *fp)
 			printk(KERN_ERR "security: ebitmap: truncated map\n");
 			goto bad;
 		}
-		n = kmalloc(sizeof(*n), GFP_KERNEL);
+		n = kzalloc(sizeof(*n), GFP_KERNEL);
 		if (!n) {
 			printk(KERN_ERR "security: ebitmap: out of memory\n");
 			rc = -ENOMEM;
 			goto bad;
 		}
-		memset(n, 0, sizeof(*n));
 
 		n->startbit = le32_to_cpu(buf[0]);
 
diff --git a/security/selinux/ss/hashtab.c b/security/selinux/ss/hashtab.c
index 26661fcc00c..24e5ec95763 100644
--- a/security/selinux/ss/hashtab.c
+++ b/security/selinux/ss/hashtab.c
@@ -15,11 +15,10 @@ struct hashtab *hashtab_create(u32 (*hash_value)(struct hashtab *h, void *key),
 	struct hashtab *p;
 	u32 i;
 
-	p = kmalloc(sizeof(*p), GFP_KERNEL);
+	p = kzalloc(sizeof(*p), GFP_KERNEL);
 	if (p == NULL)
 		return p;
 
-	memset(p, 0, sizeof(*p));
 	p->size = size;
 	p->nel = 0;
 	p->hash_value = hash_value;
@@ -55,10 +54,9 @@ int hashtab_insert(struct hashtab *h, void *key, void *datum)
 	if (cur && (h->keycmp(h, key, cur->key) == 0))
 		return -EEXIST;
 
-	newnode = kmalloc(sizeof(*newnode), GFP_KERNEL);
+	newnode = kzalloc(sizeof(*newnode), GFP_KERNEL);
 	if (newnode == NULL)
 		return -ENOMEM;
-	memset(newnode, 0, sizeof(*newnode));
 	newnode->key = key;
 	newnode->datum = datum;
 	if (prev) {
diff --git a/security/selinux/ss/policydb.c b/security/selinux/ss/policydb.c
index 8e6262d12aa..2f5f539875f 100644
--- a/security/selinux/ss/policydb.c
+++ b/security/selinux/ss/policydb.c
@@ -121,12 +121,11 @@ static int roles_init(struct policydb *p)
 	int rc;
 	struct role_datum *role;
 
-	role = kmalloc(sizeof(*role), GFP_KERNEL);
+	role = kzalloc(sizeof(*role), GFP_KERNEL);
 	if (!role) {
 		rc = -ENOMEM;
 		goto out;
 	}
-	memset(role, 0, sizeof(*role));
 	role->value = ++p->p_roles.nprim;
 	if (role->value != OBJECT_R_VAL) {
 		rc = -EINVAL;
@@ -851,12 +850,11 @@ static int perm_read(struct policydb *p, struct hashtab *h, void *fp)
 	__le32 buf[2];
 	u32 len;
 
-	perdatum = kmalloc(sizeof(*perdatum), GFP_KERNEL);
+	perdatum = kzalloc(sizeof(*perdatum), GFP_KERNEL);
 	if (!perdatum) {
 		rc = -ENOMEM;
 		goto out;
 	}
-	memset(perdatum, 0, sizeof(*perdatum));
 
 	rc = next_entry(buf, fp, sizeof buf);
 	if (rc < 0)
@@ -893,12 +891,11 @@ static int common_read(struct policydb *p, struct hashtab *h, void *fp)
 	u32 len, nel;
 	int i, rc;
 
-	comdatum = kmalloc(sizeof(*comdatum), GFP_KERNEL);
+	comdatum = kzalloc(sizeof(*comdatum), GFP_KERNEL);
 	if (!comdatum) {
 		rc = -ENOMEM;
 		goto out;
 	}
-	memset(comdatum, 0, sizeof(*comdatum));
 
 	rc = next_entry(buf, fp, sizeof buf);
 	if (rc < 0)
@@ -950,10 +947,9 @@ static int read_cons_helper(struct constraint_node **nodep, int ncons,
 
 	lc = NULL;
 	for (i = 0; i < ncons; i++) {
-		c = kmalloc(sizeof(*c), GFP_KERNEL);
+		c = kzalloc(sizeof(*c), GFP_KERNEL);
 		if (!c)
 			return -ENOMEM;
-		memset(c, 0, sizeof(*c));
 
 		if (lc) {
 			lc->next = c;
@@ -969,10 +965,9 @@ static int read_cons_helper(struct constraint_node **nodep, int ncons,
 		le = NULL;
 		depth = -1;
 		for (j = 0; j < nexpr; j++) {
-			e = kmalloc(sizeof(*e), GFP_KERNEL);
+			e = kzalloc(sizeof(*e), GFP_KERNEL);
 			if (!e)
 				return -ENOMEM;
-			memset(e, 0, sizeof(*e));
 
 			if (le) {
 				le->next = e;
@@ -1033,12 +1028,11 @@ static int class_read(struct policydb *p, struct hashtab *h, void *fp)
 	u32 len, len2, ncons, nel;
 	int i, rc;
 
-	cladatum = kmalloc(sizeof(*cladatum), GFP_KERNEL);
+	cladatum = kzalloc(sizeof(*cladatum), GFP_KERNEL);
 	if (!cladatum) {
 		rc = -ENOMEM;
 		goto out;
 	}
-	memset(cladatum, 0, sizeof(*cladatum));
 
 	rc = next_entry(buf, fp, sizeof(u32)*6);
 	if (rc < 0)
@@ -1127,12 +1121,11 @@ static int role_read(struct policydb *p, struct hashtab *h, void *fp)
 	__le32 buf[2];
 	u32 len;
 
-	role = kmalloc(sizeof(*role), GFP_KERNEL);
+	role = kzalloc(sizeof(*role), GFP_KERNEL);
 	if (!role) {
 		rc = -ENOMEM;
 		goto out;
 	}
-	memset(role, 0, sizeof(*role));
 
 	rc = next_entry(buf, fp, sizeof buf);
 	if (rc < 0)
@@ -1188,12 +1181,11 @@ static int type_read(struct policydb *p, struct hashtab *h, void *fp)
 	__le32 buf[3];
 	u32 len;
 
-	typdatum = kmalloc(sizeof(*typdatum),GFP_KERNEL);
+	typdatum = kzalloc(sizeof(*typdatum),GFP_KERNEL);
 	if (!typdatum) {
 		rc = -ENOMEM;
 		return rc;
 	}
-	memset(typdatum, 0, sizeof(*typdatum));
 
 	rc = next_entry(buf, fp, sizeof buf);
 	if (rc < 0)
@@ -1261,12 +1253,11 @@ static int user_read(struct policydb *p, struct hashtab *h, void *fp)
 	__le32 buf[2];
 	u32 len;
 
-	usrdatum = kmalloc(sizeof(*usrdatum), GFP_KERNEL);
+	usrdatum = kzalloc(sizeof(*usrdatum), GFP_KERNEL);
 	if (!usrdatum) {
 		rc = -ENOMEM;
 		goto out;
 	}
-	memset(usrdatum, 0, sizeof(*usrdatum));
 
 	rc = next_entry(buf, fp, sizeof buf);
 	if (rc < 0)
@@ -1316,12 +1307,11 @@ static int sens_read(struct policydb *p, struct hashtab *h, void *fp)
 	__le32 buf[2];
 	u32 len;
 
-	levdatum = kmalloc(sizeof(*levdatum), GFP_ATOMIC);
+	levdatum = kzalloc(sizeof(*levdatum), GFP_ATOMIC);
 	if (!levdatum) {
 		rc = -ENOMEM;
 		goto out;
 	}
-	memset(levdatum, 0, sizeof(*levdatum));
 
 	rc = next_entry(buf, fp, sizeof buf);
 	if (rc < 0)
@@ -1368,12 +1358,11 @@ static int cat_read(struct policydb *p, struct hashtab *h, void *fp)
 	__le32 buf[3];
 	u32 len;
 
-	catdatum = kmalloc(sizeof(*catdatum), GFP_ATOMIC);
+	catdatum = kzalloc(sizeof(*catdatum), GFP_ATOMIC);
 	if (!catdatum) {
 		rc = -ENOMEM;
 		goto out;
 	}
-	memset(catdatum, 0, sizeof(*catdatum));
 
 	rc = next_entry(buf, fp, sizeof buf);
 	if (rc < 0)
@@ -1567,12 +1556,11 @@ int policydb_read(struct policydb *p, void *fp)
 	nel = le32_to_cpu(buf[0]);
 	ltr = NULL;
 	for (i = 0; i < nel; i++) {
-		tr = kmalloc(sizeof(*tr), GFP_KERNEL);
+		tr = kzalloc(sizeof(*tr), GFP_KERNEL);
 		if (!tr) {
 			rc = -ENOMEM;
 			goto bad;
 		}
-		memset(tr, 0, sizeof(*tr));
 		if (ltr) {
 			ltr->next = tr;
 		} else {
@@ -1593,12 +1581,11 @@ int policydb_read(struct policydb *p, void *fp)
 	nel = le32_to_cpu(buf[0]);
 	lra = NULL;
 	for (i = 0; i < nel; i++) {
-		ra = kmalloc(sizeof(*ra), GFP_KERNEL);
+		ra = kzalloc(sizeof(*ra), GFP_KERNEL);
 		if (!ra) {
 			rc = -ENOMEM;
 			goto bad;
 		}
-		memset(ra, 0, sizeof(*ra));
 		if (lra) {
 			lra->next = ra;
 		} else {
@@ -1627,12 +1614,11 @@ int policydb_read(struct policydb *p, void *fp)
 		nel = le32_to_cpu(buf[0]);
 		l = NULL;
 		for (j = 0; j < nel; j++) {
-			c = kmalloc(sizeof(*c), GFP_KERNEL);
+			c = kzalloc(sizeof(*c), GFP_KERNEL);
 			if (!c) {
 				rc = -ENOMEM;
 				goto bad;
 			}
-			memset(c, 0, sizeof(*c));
 			if (l) {
 				l->next = c;
 			} else {
@@ -1743,12 +1729,11 @@ int policydb_read(struct policydb *p, void *fp)
 		if (rc < 0)
 			goto bad;
 		len = le32_to_cpu(buf[0]);
-		newgenfs = kmalloc(sizeof(*newgenfs), GFP_KERNEL);
+		newgenfs = kzalloc(sizeof(*newgenfs), GFP_KERNEL);
 		if (!newgenfs) {
 			rc = -ENOMEM;
 			goto bad;
 		}
-		memset(newgenfs, 0, sizeof(*newgenfs));
 
 		newgenfs->fstype = kmalloc(len + 1,GFP_KERNEL);
 		if (!newgenfs->fstype) {
@@ -1790,12 +1775,11 @@ int policydb_read(struct policydb *p, void *fp)
 				goto bad;
 			len = le32_to_cpu(buf[0]);
 
-			newc = kmalloc(sizeof(*newc), GFP_KERNEL);
+			newc = kzalloc(sizeof(*newc), GFP_KERNEL);
 			if (!newc) {
 				rc = -ENOMEM;
 				goto bad;
 			}
-			memset(newc, 0, sizeof(*newc));
 
 			newc->u.name = kmalloc(len + 1,GFP_KERNEL);
 			if (!newc->u.name) {
@@ -1843,12 +1827,11 @@ int policydb_read(struct policydb *p, void *fp)
 		nel = le32_to_cpu(buf[0]);
 		lrt = NULL;
 		for (i = 0; i < nel; i++) {
-			rt = kmalloc(sizeof(*rt), GFP_KERNEL);
+			rt = kzalloc(sizeof(*rt), GFP_KERNEL);
 			if (!rt) {
 				rc = -ENOMEM;
 				goto bad;
 			}
-			memset(rt, 0, sizeof(*rt));
 			if (lrt)
 				lrt->next = rt;
 			else
diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c
index aecdded55e7..44eb4d74908 100644
--- a/security/selinux/ss/services.c
+++ b/security/selinux/ss/services.c
@@ -1531,12 +1531,11 @@ int security_get_user_sids(u32 fromsid,
 	}
 	usercon.user = user->value;
 
-	mysids = kmalloc(maxnel*sizeof(*mysids), GFP_ATOMIC);
+	mysids = kcalloc(maxnel, sizeof(*mysids), GFP_ATOMIC);
 	if (!mysids) {
 		rc = -ENOMEM;
 		goto out_unlock;
 	}
-	memset(mysids, 0, maxnel*sizeof(*mysids));
 
 	ebitmap_for_each_bit(&user->roles, rnode, i) {
 		if (!ebitmap_node_get_bit(rnode, i))
@@ -1566,13 +1565,12 @@ int security_get_user_sids(u32 fromsid,
 				mysids[mynel++] = sid;
 			} else {
 				maxnel += SIDS_NEL;
-				mysids2 = kmalloc(maxnel*sizeof(*mysids2), GFP_ATOMIC);
+				mysids2 = kcalloc(maxnel, sizeof(*mysids2), GFP_ATOMIC);
 				if (!mysids2) {
 					rc = -ENOMEM;
 					kfree(mysids);
 					goto out_unlock;
 				}
-				memset(mysids2, 0, maxnel*sizeof(*mysids2));
 				memcpy(mysids2, mysids, mynel * sizeof(*mysids2));
 				kfree(mysids);
 				mysids = mysids2;
@@ -1714,12 +1712,11 @@ int security_get_bools(int *len, char ***names, int **values)
 		goto out;
 	}
 
-	*names = (char**)kmalloc(sizeof(char*) * *len, GFP_ATOMIC);
+	*names = (char**)kcalloc(*len, sizeof(char*), GFP_ATOMIC);
 	if (!*names)
 		goto err;
-	memset(*names, 0, sizeof(char*) * *len);
 
-	*values = (int*)kmalloc(sizeof(int) * *len, GFP_ATOMIC);
+	*values = (int*)kcalloc(*len, sizeof(int), GFP_ATOMIC);
 	if (!*values)
 		goto err;