From aad3d0e343900a4c2c5dbc73f76550aa64a0ac1b Mon Sep 17 00:00:00 2001 From: Andrei Emeltchenko Date: Thu, 6 Sep 2012 15:05:42 +0300 Subject: [PATCH] Bluetooth: Fix freeing uninitialized delayed works When releasing L2CAP socket which is in BT_CONFIG state l2cap_chan_close invokes l2cap_send_disconn_req which cancel delayed works which are only set in BT_CONNECTED state with l2cap_ertm_init. Add state check before cancelling those works. ... [ 9668.574372] [21085] l2cap_sock_release: sock cd065200, sk f073e800 [ 9668.574399] [21085] l2cap_sock_shutdown: sock cd065200, sk f073e800 [ 9668.574411] [21085] l2cap_chan_close: chan f073ec00 state BT_CONFIG sk f073e800 [ 9668.574421] [21085] l2cap_send_disconn_req: chan f073ec00 conn ecc16600 [ 9668.574441] INFO: trying to register non-static key. [ 9668.574443] the code is fine but needs lockdep annotation. [ 9668.574446] turning off the locking correctness validator. [ 9668.574450] Pid: 21085, comm: obex-client Tainted: G O 3.5.0+ #57 [ 9668.574452] Call Trace: [ 9668.574463] [] __lock_acquire+0x12e3/0x1700 [ 9668.574468] [] ? trace_hardirqs_on+0xb/0x10 [ 9668.574476] [] ? printk+0x4d/0x4f [ 9668.574479] [] lock_acquire+0x88/0x130 [ 9668.574487] [] ? try_to_del_timer_sync+0x60/0x60 [ 9668.574491] [] del_timer_sync+0x50/0xc0 [ 9668.574495] [] ? try_to_del_timer_sync+0x60/0x60 [ 9668.574515] [] l2cap_send_disconn_req+0xe3/0x160 [bluetooth] ... Signed-off-by: Andrei Emeltchenko Signed-off-by: Gustavo Padovan --- net/bluetooth/l2cap_core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c index 4ea1710a4783..38c00f142203 100644 --- a/net/bluetooth/l2cap_core.c +++ b/net/bluetooth/l2cap_core.c @@ -1008,7 +1008,7 @@ static void l2cap_send_disconn_req(struct l2cap_conn *conn, struct l2cap_chan *c if (!conn) return; - if (chan->mode == L2CAP_MODE_ERTM) { + if (chan->mode == L2CAP_MODE_ERTM && chan->state == BT_CONNECTED) { __clear_retrans_timer(chan); __clear_monitor_timer(chan); __clear_ack_timer(chan); -- 2.34.1