SELinux: Compute role in newcontext for all classes

Apply role_transition rules for all kinds of classes.
Signed-off-by: NHarry Ciao <qingtao.cao@windriver.com>
Acked-by: NStephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: NEric Paris <eparis@redhat.com>

security/selinux/ss/services.c

@@ -1484,20 +1484,18 @@ static int security_compute_sid(u32 ssid,
 				      tcontext->type, tclass, qstr);
 
 	/* Check for class-specific changes. */
-	if  (tclass == policydb.process_class) {
 	if (specified & AVTAB_TRANSITION) {
 		/* Look for a role transition rule. */
-			for (roletr = policydb.role_tr; roletr;
-			     roletr = roletr->next) {
-				if (roletr->role == scontext->role &&
-				    roletr->type == tcontext->type) {
+		for (roletr = policydb.role_tr; roletr; roletr = roletr->next) {
+			if ((roletr->role == scontext->role) &&
+			    (roletr->type == tcontext->type) &&
+			    (roletr->tclass == tclass)) {
 				/* Use the role transition rule. */
 				newcontext.role = roletr->new_role;
 				break;
 			}
 		}
 	}
-	}
 
 	/* Set the MLS attributes.
 	   This is done last because it may allocate memory. */