Bluetooth: Fix memory leak with L2CAP channels

A new l2cap_chan_free() is added to free the channels.

Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>

3 files changed, 9 insertions, 4 deletions

diff --git a/include/net/bluetooth/l2cap.h b/include/net/bluetooth/l2cap.h
index 3de90a91a4e4..0a0134161b1b 100644
--- a/include/net/bluetooth/l2cap.h
+++ b/include/net/bluetooth/l2cap.h
@@ -469,6 +469,7 @@ struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock,
 void l2cap_send_disconn_req(struct l2cap_conn *conn, struct l2cap_chan *chan, int err);
 struct l2cap_chan *l2cap_chan_alloc(struct sock *sk);
 void l2cap_chan_del(struct l2cap_chan *chan, int err);
+void l2cap_chan_free(struct l2cap_chan *chan);
 int l2cap_chan_connect(struct l2cap_chan *chan);
 
 #endif /* __L2CAP_H */
diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index 8562ac1ba947..338d8c3eedab 100644
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -160,6 +160,11 @@ struct l2cap_chan *l2cap_chan_alloc(struct sock *sk)
         return chan;
 }
 
+void l2cap_chan_free(struct l2cap_chan *chan)
+{
+        kfree(chan);
+}
+
 static void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan)
 {
         struct sock *sk = chan->sk;
@@ -236,7 +241,7 @@ void l2cap_chan_del(struct l2cap_chan *chan, int err)
 
         if (!(chan->conf_state & L2CAP_CONF_OUTPUT_DONE &&
                         chan->conf_state & L2CAP_CONF_INPUT_DONE))
-                goto free;
+                return;
 
         skb_queue_purge(&chan->tx_q);
 
@@ -255,9 +260,6 @@ void l2cap_chan_del(struct l2cap_chan *chan, int err)
                         kfree(l);
                 }
         }
-
-free:
-        kfree(chan);
 }
 
 static inline u8 l2cap_get_auth_type(struct l2cap_chan *chan)
diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c
index 61d93f6c36c8..0e23ebdf7c8f 100644
--- a/net/bluetooth/l2cap_sock.c
+++ b/net/bluetooth/l2cap_sock.c
@@ -849,6 +849,8 @@ void l2cap_sock_kill(struct sock *sk)
         BT_DBG("sk %p state %d", sk, sk->sk_state);
 
         /* Kill poor orphan */
+
+        l2cap_chan_free(l2cap_pi(sk)->chan);
         bt_sock_unlink(&l2cap_sk_list, sk);
         sock_set_flag(sk, SOCK_DEAD);
         sock_put(sk);