1 files changed, 2 insertions, 1 deletions

diff --git a/net/dccp/input.c b/net/dccp/input.c
index 7d230d14ce22..15af247ea007 100644
--- a/net/dccp/input.c
+++ b/net/dccp/input.c
@@ -241,7 +241,8 @@ static int dccp_check_seqno(struct sock *sk, struct sk_buff *skb)
                 dccp_update_gsr(sk, seqno);
 
                 if (dh->dccph_type != DCCP_PKT_SYNC &&
-                    (ackno != DCCP_PKT_WITHOUT_ACK_SEQ))
+                    ackno != DCCP_PKT_WITHOUT_ACK_SEQ &&
+                    after48(ackno, dp->dccps_gar))
                         dp->dccps_gar = ackno;
         } else {
                 unsigned long now = jiffies;