Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6

1 files changed, 22 insertions, 0 deletions

diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c
index 505c7de10c50..475bfb4972d9 100644
--- a/net/sctp/sm_statefuns.c
+++ b/net/sctp/sm_statefuns.c
@@ -5160,6 +5160,8 @@ static int sctp_eat_data(const struct sctp_association *asoc,
 	sctp_verb_t deliver;
 	int tmp;
 	__u32 tsn;
+	int account_value;
+	struct sock *sk = asoc->base.sk;
 
 	data_hdr = chunk->subh.data_hdr = (sctp_datahdr_t *)chunk->skb->data;
 	skb_pull(chunk->skb, sizeof(sctp_datahdr_t));
@@ -5169,6 +5171,26 @@ static int sctp_eat_data(const struct sctp_association *asoc,
 
 	/* ASSERT:  Now skb->data is really the user data.  */
 
+	/*
+	 * if we are established, and we have used up our receive
+	 * buffer memory, drop the frame
+	 */
+	if (asoc->state == SCTP_STATE_ESTABLISHED) {
+		/*
+		 * If the receive buffer policy is 1, then each
+		 * association can allocate up to sk_rcvbuf bytes
+		 * otherwise, all the associations in aggregate
+		 * may allocate up to sk_rcvbuf bytes
+		 */
+		if (asoc->ep->rcvbuf_policy)
+			account_value = atomic_read(&asoc->rmem_alloc);
+		else
+			account_value = atomic_read(&sk->sk_rmem_alloc);
+
+		if (account_value > sk->sk_rcvbuf)
+			return SCTP_IERROR_IGNORE_TSN;
+	}
+
 	/* Process ECN based congestion.
 	 *
 	 * Since the chunk structure is reused for all chunks within