[Bluetooth] Ignore L2CAP config requests on disconnect

Any L2CAP connection in disconnecting state shall not response
to any further config requests from the remote side. So in case
such a request is received, ignore it.

Signed-off-by: Ville Tervo <ville.tervo@nokia.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c
index c09d4a20d696..bbf78e6a7bc3 100644
--- a/net/bluetooth/l2cap.c
+++ b/net/bluetooth/l2cap.c
@@ -1533,6 +1533,9 @@ static inline int l2cap_config_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr
         if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid)))
                 return -ENOENT;
 
+        if (sk->sk_state == BT_DISCONN)
+                goto unlock;
+
         l2cap_parse_conf_req(sk, req->data, cmd->len - sizeof(*req));
 
         if (flags & 0x0001) {