1 files changed, 4 insertions, 2 deletions

diff --git a/net/dccp/input.c b/net/dccp/input.c
index 78b043c458bf..a1900157e2d7 100644
--- a/net/dccp/input.c
+++ b/net/dccp/input.c
@@ -86,7 +86,8 @@ static int dccp_check_seqno(struct sock *sk, struct sk_buff *skb)
             dh->dccph_type == DCCP_PKT_SYNCACK) {
                 if (between48(DCCP_SKB_CB(skb)->dccpd_ack_seq,
                               dp->dccps_awl, dp->dccps_awh) &&
-                    !before48(DCCP_SKB_CB(skb)->dccpd_seq, dp->dccps_swl))
+                    dccp_delta_seqno(dp->dccps_swl,
+                                     DCCP_SKB_CB(skb)->dccpd_seq) >= 0)
                         dccp_update_gsr(sk, DCCP_SKB_CB(skb)->dccpd_seq);
                 else
                         return -1;
@@ -203,7 +204,8 @@ static int __dccp_rcv_established(struct sock *sk, struct sk_buff *skb,
                 if (dp->dccps_role != DCCP_ROLE_CLIENT)
                         goto send_sync;
 check_seq:
-                if (!before48(DCCP_SKB_CB(skb)->dccpd_seq, dp->dccps_osr)) {
+                if (dccp_delta_seqno(dp->dccps_osr,
+                                     DCCP_SKB_CB(skb)->dccpd_seq) >= 0) {
 send_sync:
                         dccp_send_sync(sk, DCCP_SKB_CB(skb)->dccpd_seq,
                                        DCCP_PKT_SYNC);