hostapd: Fix couple of deinit path cases to clear pointers

This fixes some issues where dynamic interface enable/disable cycles
could end up trying to free resources twice and crash the process while
doing so.

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

src/ap/vlan_init.c

@@ -1021,6 +1021,7 @@ void vlan_deinit(struct hostapd_data *hapd)
 
 #ifdef CONFIG_FULL_DYNAMIC_VLAN
 	full_dynamic_vlan_deinit(hapd->full_dynamic_vlan);
+	hapd->full_dynamic_vlan = NULL;
 #endif /* CONFIG_FULL_DYNAMIC_VLAN */
 }
 

src/ap/wpa_auth_glue.c

@@ -618,5 +618,6 @@ void hostapd_deinit_wpa(struct hostapd_data *hapd)
 
 #ifdef CONFIG_IEEE80211R
 	l2_packet_deinit(hapd->l2);
+	hapd->l2 = NULL;
 #endif /* CONFIG_IEEE80211R */
 }