1 files changed, 3 insertions, 19 deletions

diff --git a/net/sctp/input.c b/net/sctp/input.c
index 5436c692116..b7692aab6e9 100644
--- a/net/sctp/input.c
+++ b/net/sctp/input.c
@@ -510,8 +510,7 @@ struct sock *sctp_err_lookup(int family, struct sk_buff *skb,
 	 * discard the packet.
 	 */
 	if (vtag == 0) {
-		chunkhdr = (struct sctp_init_chunk *)((void *)sctphdr
-				+ sizeof(struct sctphdr));
+		chunkhdr = (void *)sctphdr + sizeof(struct sctphdr);
 		if (len < sizeof(struct sctphdr) + sizeof(sctp_chunkhdr_t)
 			  + sizeof(__be32) ||
 		    chunkhdr->chunk_hdr.type != SCTP_CID_INIT ||
@@ -565,7 +564,7 @@ void sctp_err_finish(struct sock *sk, struct sctp_association *asoc)
  */
 void sctp_v4_err(struct sk_buff *skb, __u32 info)
 {
-	struct iphdr *iph = (struct iphdr *)skb->data;
+	const struct iphdr *iph = (const struct iphdr *)skb->data;
 	const int ihlen = iph->ihl * 4;
 	const int type = icmp_hdr(skb)->type;
 	const int code = icmp_hdr(skb)->code;
@@ -661,7 +660,6 @@ static int sctp_rcv_ootb(struct sk_buff *skb)
 {
 	sctp_chunkhdr_t *ch;
 	__u8 *ch_end;
-	sctp_errhdr_t *err;
 
 	ch = (sctp_chunkhdr_t *) skb->data;
 
@@ -697,20 +695,6 @@ static int sctp_rcv_ootb(struct sk_buff *skb)
 		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));
 
@@ -1017,7 +1001,7 @@ static struct sctp_association *__sctp_rcv_asconf_lookup(
 	/* Skip over the ADDIP header and find the Address parameter */
 	param = (union sctp_addr_param *)(asconf + 1);
 
-	af = sctp_get_af_specific(param_type2af(param->v4.param_hdr.type));
+	af = sctp_get_af_specific(param_type2af(param->p.type));
 	if (unlikely(!af))
 		return NULL;