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Commit e67f85ec authored by Lee A. Roberts's avatar Lee A. Roberts Committed by David S. Miller
Browse files

sctp: fix association hangs due to reneging packets below the cumulative TSN ACK point 



In sctp_ulpq_renege_list(), do not renege packets below the
cumulative TSN ACK point.

Signed-off-by: default avatarLee A. Roberts <lee.roberts@hp.com>
Acked-by: default avatarVlad Yasevich <vyasevich@gmail.com>
Acked-by: default avatarNeil Horman <nhorman@tuxdriver.com>
parent 70fc69bc

net/sctp/ulpqueue.c

+7 −2
Original line number Diff line number Diff line
@@ -969,11 +969,16 @@ static __u16 sctp_ulpq_renege_list(struct sctp_ulpq *ulpq, 


	tsnmap = &ulpq->asoc->peer.tsn_map;



	while ((skb = __skb_dequeue_tail(list)) != NULL) {

		freed += skb_headlen(skb);

	while ((skb = skb_peek_tail(list)) != NULL) {

		event = sctp_skb2event(skb);

		tsn = event->tsn;



		/* Don't renege below the Cumulative TSN ACK Point. */

		if (TSN_lte(tsn, sctp_tsnmap_get_ctsn(tsnmap)))

			break;



		__skb_unlink(skb, list);

		freed += skb_headlen(skb);

		sctp_ulpevent_free(event);

		sctp_tsnmap_renege(tsnmap, tsn);

		if (freed >= needed)