Bluetooth: check for l2cap header in start fragment
BLUETOOTH SPECIFICATION Version 4.0 [Vol 3] page 36 mentioned
"Note: Start Fragments always begin with the Basic L2CAP header
of a PDU."
Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@nokia.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c
index 5441083..7da6432 100644
--- a/net/bluetooth/l2cap.c
+++ b/net/bluetooth/l2cap.c
@@ -4675,7 +4675,8 @@
l2cap_conn_unreliable(conn, ECOMM);
}
- if (skb->len < 2) {
+ /* Start fragment always begin with Basic L2CAP header */
+ if (skb->len < L2CAP_HDR_SIZE) {
BT_ERR("Frame is too short (len %d)", skb->len);
l2cap_conn_unreliable(conn, ECOMM);
goto drop;