Bluetooth: Fix crash when monitor timeout expires

The code was crashing due to a invalid access to hci_conn after the
channel disconnect.

Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
Reviewed-by: João Paulo Rechi Vita <jprvita@profusion.mobi>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c
index 4c7b2d22faa5a536bf556ef3ae1ae7e780cf2809..2f9bbad428872700f1f33843c121ab9bab677fe6 100644 (file)
--- a/net/bluetooth/l2cap.c
+++ b/net/bluetooth/l2cap.c
@@ -1568,6 +1568,9 @@ static struct sk_buff *l2cap_create_iframe_pdu(struct sock *sk, struct msghdr *m
 
        BT_DBG("sk %p len %d", sk, (int)len);
 
+       if (!conn)
+               return ERR_PTR(-ENOTCONN);
+
        if (sdulen)
                hlen += 2;