Now all ctrl chunks are counted for asoc stats.octrlchunks and net
SCTP_MIB_OUTCTRLCHUNKS either after queuing up or bundling, other
than the chunk maked and bundled in sctp_packet_bundle_sack, which
caused 'outctrlchunks' not consistent with 'inctrlchunks' in peer.

This issue exists since very beginning, here to fix it by increasing
both net SCTP_MIB_OUTCTRLCHUNKS and asoc stats.octrlchunks when sack
chunk is maked and bundled in sctp_packet_bundle_sack.

Reported-by: Ja Ram Jeon <redacted>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
---
 net/sctp/output.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/sctp/output.c b/net/sctp/output.c
index e0c2747..dbda7e7 100644
--- a/net/sctp/output.c
+++ b/net/sctp/output.c

@@ -282,6 +282,9 @@ static enum sctp_xmit sctp_packet_bundle_sack(struct sctp_packet *pkt,
 					sctp_chunk_free(sack);
 					goto out;
 				}
+				SCTP_INC_STATS(sock_net(asoc->base.sk),
+					       SCTP_MIB_OUTCTRLCHUNKS);
+				asoc->stats.octrlchunks++;
 				asoc->peer.sack_needed = 0;
 				if (del_timer(timer))
 					sctp_association_put(asoc);

-- 
2.1.0