From: "Lee A. Roberts" <lee.roberts@xxxxxx>
In sctp_ulpq_renege_list(), do not renege packets below the
cumulative TSN ACK point.
Signed-off-by: Lee A. Roberts <lee.roberts@xxxxxx>
---
net/sctp/ulpqueue.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/net/sctp/ulpqueue.c b/net/sctp/ulpqueue.c
index ada1746..63afddc 100644
--- a/net/sctp/ulpqueue.c
+++ b/net/sctp/ulpqueue.c
@@ -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)
--
1.7.9.5
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