In cloud computing, short TCP flows seize bandwidth resources by padding \"Junk packets\" among \"Real packets\", which is called the padding misbehavior. Such misbehaviors could quickly put the cloud network into congestion state. To alleviate this problem, the authors present a new non-cooperative game model based on throughput utility and delay utility. The model describes the competition for bandwidth resources among different flows. The Nash equilibrium of the game is the solution to the problem. On the basis of their game model, an active queue management algorithm is proposed for short TCP flows running on a router system.