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-rw-r--r--net/dccp/dccp.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/dccp/dccp.h b/net/dccp/dccp.h
index 45087052d89..5fdb0722901 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);
/*