--- zzzz-none-000/linux-2.6.39.4/net/sctp/input.c	2011-08-03 19:43:28.000000000 +0000
+++ puma6-atom-6490-729/linux-2.6.39.4/net/sctp/input.c	2021-11-10 13:38:18.000000000 +0000
@@ -661,7 +661,6 @@
 {
 	sctp_chunkhdr_t *ch;
 	__u8 *ch_end;
-	sctp_errhdr_t *err;
 
 	ch = (sctp_chunkhdr_t *) skb->data;
 
@@ -697,20 +696,6 @@
 		if (SCTP_CID_INIT == ch->type && (void *)ch != skb->data)
 			goto discard;
 
-		/* RFC 8.4, 7) If the packet contains a "Stale cookie" ERROR
-		 * or a COOKIE ACK the SCTP Packet should be silently
-		 * discarded.
-		 */
-		if (SCTP_CID_COOKIE_ACK == ch->type)
-			goto discard;
-
-		if (SCTP_CID_ERROR == ch->type) {
-			sctp_walk_errors(err, ch) {
-				if (SCTP_ERROR_STALE_COOKIE == err->cause)
-					goto discard;
-			}
-		}
-
 		ch = (sctp_chunkhdr_t *) ch_end;
 	} while (ch_end < skb_tail_pointer(skb));