This is a note to let you know that I've just added the patch titled
Bluetooth: l2cap: always unlock channel in l2cap_conless_channel()
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
bluetooth-l2cap-always-unlock-channel-in-l2cap_conle.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit f24f5e0500f606fae43f15d63a17e8d58f381b18
Author: Dmitry Antipov <dmantipov@xxxxxxxxx>
Date: Wed Jul 31 12:19:36 2024 +0300
Bluetooth: l2cap: always unlock channel in l2cap_conless_channel()
[ 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@xxxxxxxxxxxxxxxxxxxxxxxxx
Closes: https://syzkaller.appspot.com/bug?extid=45ac74737e866894acb0
Signed-off-by: Dmitry Antipov <dmantipov@xxxxxxxxx>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
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;
}
