diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c
index 477d7f8..71c9a96 100644
--- a/net/sctp/sm_statefuns.c
+++ b/net/sctp/sm_statefuns.c
@@ -3090,6 +3090,8 @@
 			break;
 
 		ch_end = ((__u8 *)ch) + WORD_ROUND(ntohs(ch->length));
+		if (ch_end > skb->tail)
+			break;
 
 		if (SCTP_CID_SHUTDOWN_ACK == ch->type)
 			ootb_shut_ack = 1;