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| author | Gustavo F. Padovan <gustavo@las.ic.unicamp.br> | 2009-08-24 00:45:19 -0300 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2009-08-24 01:05:05 -0700 |
| commit | e686219a64fee9be9ce438dc3f040cd71ddd168a (patch) | |
| tree | 1b72117be85dc4dd5c4656e459043d2528069760 | |
| parent | 9e726b17422bade75fba94e625cd35fd1353e682 (diff) | |
| download | blackbird-op-linux-e686219a64fee9be9ce438dc3f040cd71ddd168a.tar.gz blackbird-op-linux-e686219a64fee9be9ce438dc3f040cd71ddd168a.zip | |
Bluetooth: Add locking scheme to L2CAP timeout callbacks
Avoid race conditions when accessing the L2CAP socket from within the
timeout handlers.
Signed-off-by: Gustavo F. Padovan <gustavo@las.ic.unicamp.br>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
| -rw-r--r-- | net/bluetooth/l2cap.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c index c04526f3df2e..efac637525f1 100644 --- a/net/bluetooth/l2cap.c +++ b/net/bluetooth/l2cap.c @@ -1192,6 +1192,7 @@ static void l2cap_monitor_timeout(unsigned long arg) struct sock *sk = (void *) arg; u16 control; + bh_lock_sock(sk); if (l2cap_pi(sk)->retry_count >= l2cap_pi(sk)->remote_max_tx) { l2cap_send_disconn_req(l2cap_pi(sk)->conn, sk); return; @@ -1203,6 +1204,7 @@ static void l2cap_monitor_timeout(unsigned long arg) control = L2CAP_CTRL_POLL; control |= L2CAP_SUPER_RCV_READY; l2cap_send_sframe(l2cap_pi(sk), control); + bh_unlock_sock(sk); } static void l2cap_retrans_timeout(unsigned long arg) @@ -1210,6 +1212,7 @@ static void l2cap_retrans_timeout(unsigned long arg) struct sock *sk = (void *) arg; u16 control; + bh_lock_sock(sk); l2cap_pi(sk)->retry_count = 1; __mod_monitor_timer(); @@ -1218,6 +1221,7 @@ static void l2cap_retrans_timeout(unsigned long arg) control = L2CAP_CTRL_POLL; control |= L2CAP_SUPER_RCV_READY; l2cap_send_sframe(l2cap_pi(sk), control); + bh_unlock_sock(sk); } static void l2cap_drop_acked_frames(struct sock *sk) |
