hostapd: fix a null pointer dereference in wpa_supplicant on teardown

Signed-off-by: Felix Fietkau <[email protected]>

package/network/services/hostapd/patches/052-AP-add-missing-null-pointer-check-in-hostapd_free_ha.patch

@@ -0,0 +1,20 @@
+From: Felix Fietkau <[email protected]>
+Date: Wed, 1 May 2024 18:55:24 +0200
+Subject: [PATCH] AP: add missing null pointer check in hostapd_free_hapd_data
+
+When called from wpa_supplicant, iface->interfaces can be NULL
+
+Signed-off-by: Felix Fietkau <[email protected]>
+---
+
+--- a/src/ap/hostapd.c
++++ b/src/ap/hostapd.c
+@@ -502,7 +502,7 @@ void hostapd_free_hapd_data(struct hosta
+ 		struct hapd_interfaces *ifaces = hapd->iface->interfaces;
+ 		size_t i;
+ 
+-		for (i = 0; i < ifaces->count; i++) {
++		for (i = 0; ifaces && i < ifaces->count; i++) {
+ 			struct hostapd_iface *iface = ifaces->iface[i];
+ 			size_t j;
+