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: Ulisses Furquim <ulisses@profusion.mobi> Acked-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
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@ -1018,10 +1018,10 @@ static void l2cap_conn_del(struct hci_conn *hcon, int err)
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hci_chan_del(conn->hchan);
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if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT)
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__cancel_delayed_work(&conn->info_timer);
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cancel_delayed_work_sync(&conn->info_timer);
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if (test_and_clear_bit(HCI_CONN_LE_SMP_PEND, &hcon->pend)) {
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__cancel_delayed_work(&conn->security_timer);
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cancel_delayed_work_sync(&conn->security_timer);
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smp_chan_destroy(conn);
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}
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