--- linux-4.9.37/net/ipv4/cipso_ipv4.c	2017-07-12 16:42:41.000000000 +0300
+++ linux-4.9.y/net/ipv4/cipso_ipv4.c	2021-06-07 13:01:34.000000000 +0300
@@ -1271,7 +1271,8 @@
 			return ret_val;
 		}
 
-		secattr->flags |= NETLBL_SECATTR_MLS_CAT;
+		if (secattr->attr.mls.cat)
+			secattr->flags |= NETLBL_SECATTR_MLS_CAT;
 	}
 
 	return 0;
@@ -1452,7 +1453,8 @@
 			return ret_val;
 		}
 
-		secattr->flags |= NETLBL_SECATTR_MLS_CAT;
+		if (secattr->attr.mls.cat)
+			secattr->flags |= NETLBL_SECATTR_MLS_CAT;
 	}
 
 	return 0;