selinux: Use kmalloc_array() in sidtab_init()

A multiplication for the size determination of a memory allocation
indicated that an array data structure should be processed.
Thus use the corresponding function "kmalloc_array".

This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Paul Moore <paul@paul-moore.com>

security/selinux/ss/sidtab.c

@@ -18,7 +18,7 @@ int sidtab_init(struct sidtab *s)
 {
 	int i;
 
-	s->htable = kmalloc(sizeof(*(s->htable)) * SIDTAB_SIZE, GFP_ATOMIC);
+	s->htable = kmalloc_array(SIDTAB_SIZE, sizeof(*s->htable), GFP_ATOMIC);
 	if (!s->htable)
 		return -ENOMEM;
 	for (i = 0; i < SIDTAB_SIZE; i++)