1 files changed, 12 insertions, 0 deletions

diff --git a/net/sctp/outqueue.c b/net/sctp/outqueue.c
index 16d451a62b3f..e333d5833616 100644
--- a/net/sctp/outqueue.c
+++ b/net/sctp/outqueue.c
@@ -598,11 +598,23 @@ static int sctp_outq_flush_rtx(struct sctp_outq *q, struct sctp_packet *pkt,
                 if (fast_rtx && !chunk->fast_retransmit)
                         continue;
 
+redo:
                 /* Attempt to append this chunk to the packet. */
                 status = sctp_packet_append_chunk(pkt, chunk);
 
                 switch (status) {
                 case SCTP_XMIT_PMTU_FULL:
+                        if (!pkt->has_data && !pkt->has_cookie_echo) {
+                                /* If this packet did not contain DATA then
+                                 * retransmission did not happen, so do it
+                                 * again.  We'll ignore the error here since
+                                 * control chunks are already freed so there
+                                 * is nothing we can do.
+                                 */
+                                sctp_packet_transmit(pkt);
+                                goto redo;
+                        }
+
                         /* Send this packet.  */
                         error = sctp_packet_transmit(pkt);