1 files changed, 8 insertions, 0 deletions

diff --git a/net/dccp/output.c b/net/dccp/output.c
index 1b3168307586..bfda071559f4 100644
--- a/net/dccp/output.c
+++ b/net/dccp/output.c
@@ -305,6 +305,8 @@ void dccp_write_xmit(struct sock *sk, int block)
                         if (err)
                                 DCCP_BUG("err=%d after ccid_hc_tx_packet_sent",
                                          err);
+                        if (dp->dccps_sync_scheduled)
+                                dccp_send_sync(sk, dp->dccps_gsr, DCCP_PKT_SYNC);
                 } else {
                         dccp_pr_debug("packet discarded due to err=%d\n", err);
                         kfree_skb(skb);
@@ -591,6 +593,12 @@ void dccp_send_sync(struct sock *sk, const u64 ackno,
         DCCP_SKB_CB(skb)->dccpd_type = pkt_type;
         DCCP_SKB_CB(skb)->dccpd_ack_seq = ackno;
 
+        /*
+         * Clear the flag in case the Sync was scheduled for out-of-band data,
+         * such as carrying a long Ack Vector.
+         */
+        dccp_sk(sk)->dccps_sync_scheduled = 0;
+
         dccp_transmit_skb(sk, skb);
 }