Bluetooth: L2CAP: Fix not initializing sk_peer_pid

In order to group sockets being connected using L2CAP_MODE_EXT_FLOWCTL
the pid is used but sk_peer_pid was not being initialized as it is
currently only done for af_unix.

Fixes: b48596d1dc25 ("Bluetooth: L2CAP: Add get_peer_pid callback")
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c
index 160c016..4574c5c 100644 (file)
--- a/net/bluetooth/l2cap_sock.c
+++ b/net/bluetooth/l2cap_sock.c
@@ -172,6 +172,21 @@ done:
        return err;
 }
 
+static void l2cap_sock_init_pid(struct sock *sk)
+{
+       struct l2cap_chan *chan = l2cap_pi(sk)->chan;
+
+       /* Only L2CAP_MODE_EXT_FLOWCTL ever need to access the PID in order to
+        * group the channels being requested.
+        */
+       if (chan->mode != L2CAP_MODE_EXT_FLOWCTL)
+               return;
+
+       spin_lock(&sk->sk_peer_lock);
+       sk->sk_peer_pid = get_pid(task_tgid(current));
+       spin_unlock(&sk->sk_peer_lock);
+}
+
 static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr,
                              int alen, int flags)
 {
@@ -243,6 +258,8 @@ static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr,
        if (chan->psm && bdaddr_type_is_le(chan->src_type) && !chan->mode)
                chan->mode = L2CAP_MODE_LE_FLOWCTL;
 
+       l2cap_sock_init_pid(sk);
+
        err = l2cap_chan_connect(chan, la.l2_psm, __le16_to_cpu(la.l2_cid),
                                 &la.l2_bdaddr, la.l2_bdaddr_type);
        if (err)
@@ -298,6 +315,8 @@ static int l2cap_sock_listen(struct socket *sock, int backlog)
                goto done;
        }
 
+       l2cap_sock_init_pid(sk);
+
        sk->sk_max_ack_backlog = backlog;
        sk->sk_ack_backlog = 0;