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

Conflicts:

	drivers/macintosh/adbhid.c

1 files changed, 27 insertions, 0 deletions

diff --git a/net/sctp/inqueue.c b/net/sctp/inqueue.c
index 88aa2240754..f10fe7fbf24 100644
--- a/net/sctp/inqueue.c
+++ b/net/sctp/inqueue.c
@@ -100,6 +100,25 @@ void sctp_inq_push(struct sctp_inq *q, struct sctp_chunk *chunk)
 	q->immediate.func(&q->immediate);
 }
 
+/* Peek at the next chunk on the inqeue. */
+struct sctp_chunkhdr *sctp_inq_peek(struct sctp_inq *queue)
+{
+	struct sctp_chunk *chunk;
+	sctp_chunkhdr_t *ch = NULL;
+
+	chunk = queue->in_progress;
+	/* If there is no more chunks in this packet, say so */
+	if (chunk->singleton ||
+	    chunk->end_of_packet ||
+	    chunk->pdiscard)
+		    return NULL;
+
+	ch = (sctp_chunkhdr_t *)chunk->chunk_end;
+
+	return ch;
+}
+
+
 /* Extract a chunk from an SCTP inqueue.
  *
  * WARNING:  If you need to put the chunk on another queue, you need to
@@ -130,6 +149,14 @@ struct sctp_chunk *sctp_inq_pop(struct sctp_inq *queue)
 			/* Force chunk->skb->data to chunk->chunk_end.  */
 			skb_pull(chunk->skb,
 				 chunk->chunk_end - chunk->skb->data);
+
+			/* Verify that we have at least chunk headers
+			 * worth of buffer left.
+			 */
+			if (skb_headlen(chunk->skb) < sizeof(sctp_chunkhdr_t)) {
+				sctp_chunk_free(chunk);
+				chunk = queue->in_progress = NULL;
+			}
 		}
 	}