Interworking: Do not share ANQP info if none was received

Verify that the other BSS has actually received some valid ANQP
information before sharing the results from it. This fixes potential
issues with cases where some of the APs with the same HESSID has invalid
ANQP configuration.

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

wpa_supplicant/interworking.c

@@ -1680,6 +1680,11 @@ interworking_match_anqp_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
 			continue;
 		if (other->anqp == NULL)
 			continue;
+		if (other->anqp->roaming_consortium == NULL &&
+		    other->anqp->nai_realm == NULL &&
+		    other->anqp->anqp_3gpp == NULL &&
+		    other->anqp->domain_name == NULL)
+			continue;
 		if (!(other->flags & WPA_BSS_ANQP_FETCH_TRIED))
 			continue;
 		if (os_memcmp(bss->hessid, other->hessid, ETH_ALEN) != 0)