qcacld-3.0: Check for zero/broadcast BSSID in BLM

Currently the BLM does not check the BSSID of
the entry for 0 or broadcast BSSID, and thus
can lead to addition of many entries with such
property.
This would also result in removal of old valid BSSID
entry data, which is essentially required.

Fix is to check the BSSID of the entry for 0
or broadcast, and reject them if not valid.

Change-Id: I2939673a1c4efb1a22e03ffe82121513c071fa4b
CRs-Fixed: 2595331

components/blacklist_mgr/core/src/wlan_blm_core.c

@@ -719,6 +719,12 @@ blm_add_bssid_to_reject_list(struct wlan_objmgr_pdev *pdev,
 		return QDF_STATUS_E_INVAL;
 	}
 
+	if (qdf_is_macaddr_zero(&ap_info->bssid) ||
+	    qdf_is_macaddr_group(&ap_info->bssid)) {
+		blm_err("Zero/Broadcast BSSID received, entry not added");
+		return QDF_STATUS_E_INVAL;
+	}
+
 	status = qdf_mutex_acquire(&blm_ctx->reject_ap_list_lock);
 	if (QDF_IS_STATUS_ERROR(status)) {
 		blm_err("failed to acquire reject_ap_list_lock");