mac80211_hwsim: fix possible memory leak in hwsim_new_radio_nl()

'hwname' is malloced in hwsim_new_radio_nl() and should be freed
before leaving from the error handling cases, otherwise it will cause
memory leak.

Fixes: ff4dd73dd2b4 ("mac80211_hwsim: check HWSIM_ATTR_RADIO_NAME length")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Reviewed-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
static bool hwsim_ps_rx_ok(struct mac80211_hwsim_data *data,
			   struct sk_buff *skb)
{
	switch (data->ps) {
	case PS_DISABLED:
		return true;
	case PS_ENABLED:
		return false;
	case PS_AUTO_POLL:
		/* TODO: accept (some) Beacons by default and other frames only
		 * if pending PS-Poll has been sent */
		return true;
	case PS_MANUAL_POLL:
		/* Allow unicast frames to own address if there is a pending
		 * PS-Poll */
		if (data->ps_poll_pending &&
		    mac80211_hwsim_addr_match(data, skb->data + 4)) {
			data->ps_poll_pending = false;
			return true;
		}
		return false;
	}

	return true;
}

static bool hwsim_ps_rx_ok(struct mac80211_hwsim_data *data,
			   struct sk_buff *skb)
{
	switch (data->ps) {
	case PS_DISABLED:
		return true;
	case PS_ENABLED:
		return false;
	case PS_AUTO_POLL:
		/* TODO: accept (some) Beacons by default and other frames only
		 * if pending PS-Poll has been sent */
		return true;
	case PS_MANUAL_POLL:
		/* Allow unicast frames to own address if there is a pending
		 * PS-Poll */
		if (data->ps_poll_pending &&
		    mac80211_hwsim_addr_match(data, skb->data + 4)) {
			data->ps_poll_pending = false;
			return true;
		}
		return false;
	}

	return true;
}
