1 files changed, 9 insertions, 0 deletions

diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 5dd6dd7d091e..d6e3d269e906 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -509,7 +509,16 @@ int tcp_fragment(struct sock *sk, struct sk_buff *skb, u32 len, unsigned int mss
                         tp->lost_out -= diff;
                         tp->left_out -= diff;
                 }
+
                 if (diff > 0) {
+                        /* Adjust Reno SACK estimate. */
+                        if (!tp->rx_opt.sack_ok) {
+                                tp->sacked_out -= diff;
+                                if ((int)tp->sacked_out < 0)
+                                        tp->sacked_out = 0;
+                                tcp_sync_left_out(tp);
+                        }
+
                         tp->fackets_out -= diff;
                         if ((int)tp->fackets_out < 0)
                                 tp->fackets_out = 0;