hostapd: Fix WPA, IEEE 802.1X, and WPS deinit in cases where init fails

With driver wrappers that implement set_privacy(), set_generic_elem(),
set_ieee8021x(), or set_ap_wps_ie(), it was possible to hit a NULL
pointer dereference in error cases where interface setup failed and
the network configuration used WPA/WPA2, IEEE 802.1X, or WPS.

Fix this by skipping the driver operations in case the driver interface
is not initialized.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>

src/ap/ieee802_1x.c

@@ -2190,7 +2190,7 @@ void ieee802_1x_deinit(struct hostapd_data *hapd)
 {
 	eloop_cancel_timeout(ieee802_1x_rekey, hapd, NULL);
 
-	if (hapd->driver != NULL &&
+	if (hapd->driver && hapd->drv_priv &&
 	    (hapd->conf->ieee802_1x || hapd->conf->wpa))
 		hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 0);
 

src/ap/wpa_auth_glue.c

@@ -674,13 +674,14 @@ void hostapd_deinit_wpa(struct hostapd_data *hapd)
 		wpa_deinit(hapd->wpa_auth);
 		hapd->wpa_auth = NULL;
 
-		if (hostapd_set_privacy(hapd, 0)) {
+		if (hapd->drv_priv && hostapd_set_privacy(hapd, 0)) {
 			wpa_printf(MSG_DEBUG, "Could not disable "
 				   "PrivacyInvoked for interface %s",
 				   hapd->conf->iface);
 		}
 
-		if (hostapd_set_generic_elem(hapd, (u8 *) "", 0)) {
+		if (hapd->drv_priv &&
+		    hostapd_set_generic_elem(hapd, (u8 *) "", 0)) {
 			wpa_printf(MSG_DEBUG, "Could not remove generic "
 				   "information element from interface %s",
 				   hapd->conf->iface);

src/ap/wps_hostapd.c

@@ -872,7 +872,8 @@ static void hostapd_wps_clear_ies(struct hostapd_data *hapd, int deinit_only)
 	hapd->wps_probe_resp_ie = NULL;
 
 	if (deinit_only) {
-		hostapd_reset_ap_wps_ie(hapd);
+		if (hapd->drv_priv)
+			hostapd_reset_ap_wps_ie(hapd);
 		return;
 	}