4.19-stable review patch. If anyone has any objections, please let me know.
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From: Dmitry Antipov dmantipov@yandex.ru
[ Upstream commit c531e63871c0b50c8c4e62c048535a08886fba3e ]
Add missing call to 'l2cap_chan_unlock()' on receive error handling path in 'l2cap_conless_channel()'.
Fixes: a24cce144b98 ("Bluetooth: Fix reference counting of global L2CAP channels") Reported-by: syzbot+45ac74737e866894acb0@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=45ac74737e866894acb0 Signed-off-by: Dmitry Antipov dmantipov@yandex.ru Signed-off-by: Luiz Augusto von Dentz luiz.von.dentz@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- net/bluetooth/l2cap_core.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c index 3f9b2b4a62ffd..ca225c1325237 100644 --- a/net/bluetooth/l2cap_core.c +++ b/net/bluetooth/l2cap_core.c @@ -7055,6 +7055,7 @@ static void l2cap_conless_channel(struct l2cap_conn *conn, __le16 psm, bt_cb(skb)->l2cap.psm = psm;
if (!chan->ops->recv(chan, skb)) { + l2cap_chan_unlock(chan); l2cap_chan_put(chan); return; }