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-rw-r--r--net/sctp/ulpqueue.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/net/sctp/ulpqueue.c b/net/sctp/ulpqueue.c
index bfb197e37da3..b29e3e4b72c9 100644
--- a/net/sctp/ulpqueue.c
+++ b/net/sctp/ulpqueue.c
@@ -190,7 +190,14 @@ int sctp_ulpq_tail_event(struct sctp_ulpq *ulpq, struct sctp_ulpevent *event)
if (!sctp_sk(sk)->pd_mode) {
queue = &sk->sk_receive_queue;
} else if (ulpq->pd_mode) {
- if (event->msg_flags & MSG_NOTIFICATION)
+ /* If the association is in partial delivery, we
+ * need to finish delivering the partially processed
+ * packet before passing any other data. This is
+ * because we don't truly support stream interleaving.
+ */
+ if ((event->msg_flags & MSG_NOTIFICATION) ||
+ (SCTP_DATA_NOT_FRAG ==
+ (event->msg_flags & SCTP_DATA_FRAG_MASK)))
queue = &sctp_sk(sk)->pd_lobby;
else {
clear_pd = event->msg_flags & MSG_EOR;
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