qcacmn: Trim operation classes to max supported in tdls_extract_params

Operation classes supported can be controlled by user, which can
be sent greater than the max supported operations. This results
in stack overflow in change station command for TDLS sta.

Add check to validate operations supported param given by user
and if it exceeds max supported value, set it to max supported
value.

Change-Id: Idd3a35e38b091546a17d7ec6329f19429e5c289c
CRs-Fixed: 2361464

os_if/linux/tdls/src/wlan_cfg80211_tdls.c

@@ -334,6 +334,13 @@ wlan_cfg80211_tdls_extract_params(struct tdls_update_peer_params *req_info,
 	if (params->supported_channels_len)
 		tdls_calc_channels_from_staparams(req_info, params);
 
+	if (params->supported_oper_classes_len > WLAN_MAX_SUPP_OPER_CLASSES) {
+		cfg80211_debug("received oper classes:%d, resetting it to max supported: %d",
+			       params->supported_oper_classes_len,
+			       WLAN_MAX_SUPP_OPER_CLASSES);
+		params->supported_oper_classes_len = WLAN_MAX_SUPP_OPER_CLASSES;
+	}
+
 	qdf_mem_copy(req_info->supported_oper_classes,
 		     params->supported_oper_classes,
 		     params->supported_oper_classes_len);