Return-Path: From: Harish Jenny K N To: CC: , , , , , Subject: [PATCH] Bluetooth: Fix use after free in l2cap_chan_timeout Date: Wed, 18 Mar 2015 17:29:00 +0530 Message-ID: <1426679940-20710-1-git-send-email-harish_kandiga@mentor.com> MIME-Version: 1.0 Content-Type: text/plain List-ID: 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 --- net/bluetooth/l2cap_core.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c index 6ba33f9..3c3421e 100644 --- a/net/bluetooth/l2cap_core.c +++ b/net/bluetooth/l2cap_core.c @@ -415,6 +415,11 @@ 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