提交 24d2b8c0 编写于 作者: U Ulisses Furquim 提交者: Johan Hedberg

Bluetooth: Fix possible use after free in delete path

We need to use the _sync() version for cancelling the info and security
timer in the L2CAP connection delete path. Otherwise the delayed work
handler might run after the connection object is freed.
Signed-off-by: NUlisses Furquim <ulisses@profusion.mobi>
Acked-by: NMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: NJohan Hedberg <johan.hedberg@intel.com>
上级 6de32750
......@@ -1018,10 +1018,10 @@ static void l2cap_conn_del(struct hci_conn *hcon, int err)
hci_chan_del(conn->hchan);
if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT)
__cancel_delayed_work(&conn->info_timer);
cancel_delayed_work_sync(&conn->info_timer);
if (test_and_clear_bit(HCI_CONN_LE_SMP_PEND, &hcon->pend)) {
__cancel_delayed_work(&conn->security_timer);
cancel_delayed_work_sync(&conn->security_timer);
smp_chan_destroy(conn);
}
......
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