There is a potential use after free in bt_sock_poll when a socket gets killed without getting unlinked from accept_q. Hence added code to unlink from accpept_q by calling teardown before freeing the socket for channel type L2CAP_CHAN_CONN_ORIENTED. Signed-off-by: Harish Jenny K N <harish_kandiga@xxxxxxxxxx> --- net/bluetooth/l2cap_core.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c index 6ba33f9..3e273e6 100644 --- a/net/bluetooth/l2cap_core.c +++ b/net/bluetooth/l2cap_core.c @@ -415,6 +415,10 @@ static void l2cap_chan_timeout(struct work_struct *work) l2cap_chan_close(chan, reason); + if ((chan->state == BT_CONNECTED || chan->state == BT_CONFIG) && + chan->chan_type == L2CAP_CHAN_CONN_ORIENTED) + chan->ops->teardown(chan, 0); + l2cap_chan_unlock(chan); chan->ops->close(chan); -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
