Haven't played myself since the mid 80's but Malinga's action was classed as "square arm" then. What has changed ? Or am I way off mark ?
Not sure what you mean by "square arm" but I believe he keeps his arm straight so he's not breaking any rule.
20 -30 yrs ago he would have been "no balled", but with slow mo cameras etc it is deemed legal. Still looks like a throw to me though.