1 files changed, 2 insertions, 1 deletions

diff --git a/net/dccp/dccp.h b/net/dccp/dccp.h
index 45087052d894..5fdb07229017 100644
--- a/net/dccp/dccp.h
+++ b/net/dccp/dccp.h
@@ -426,7 +426,8 @@ static inline void dccp_update_gsr(struct sock *sk, u64 seq)
 {
         struct dccp_sock *dp = dccp_sk(sk);
 
-        dp->dccps_gsr = seq;
+        if (after48(seq, dp->dccps_gsr))
+                dp->dccps_gsr = seq;
         /* Sequence validity window depends on remote Sequence Window (7.5.1) */
         dp->dccps_swl = SUB48(ADD48(dp->dccps_gsr, 1), dp->dccps_r_seq_win / 4);
         /*