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-rw-r--r--net/sctp/outqueue.c12
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);