1 files changed, 5 insertions, 0 deletions

diff --git a/net/sctp/output.c b/net/sctp/output.c
index f1b7d4bb591e..6ae47acaaec6 100644
--- a/net/sctp/output.c
+++ b/net/sctp/output.c
@@ -248,6 +248,11 @@ static sctp_xmit_t sctp_packet_bundle_sack(struct sctp_packet *pkt,
                 /* If the SACK timer is running, we have a pending SACK */
                 if (timer_pending(timer)) {
                         struct sctp_chunk *sack;
+
+                        if (pkt->transport->sack_generation !=
+                            pkt->transport->asoc->peer.sack_generation)
+                                return retval;
+
                         asoc->a_rwnd = asoc->rwnd;
                         sack = sctp_make_sack(asoc);
                         if (sack) {