check for overflows in SV_SetConfigstring and print a warning message when the gs buffer overflows

code/server/sv_client.cpp

@@ -630,6 +630,10 @@ static void SV_SendClientGameState( client_t* client )
 
 	MSG_WriteLong( &msg, sv.checksumFeed );
 
+	if ( msg.overflowed ) {
+		Com_Printf( "ERROR: gamestate message buffer overflow\n" );
+	}
+
 	SV_SendMessageToClient( &msg, client );
 }
 

code/server/sv_init.cpp

@@ -42,6 +42,10 @@ void SV_SetConfigstring (int index, const char *val) {
 		val = "";
 	}
 
+	if ( strlen(val) >= BIG_INFO_STRING ) {
+		Com_Error( ERR_DROP, "SV_SetConfigstring: CS %d is too long\n", index );
+	}
+
 	// don't bother broadcasting an update if no change
 	if ( !strcmp( val, sv.configstrings[ index ] ) ) {
 		return;