java, 244 bytes

Result

AC

Duration

1643ms

Code [DL]

import java.util.Scanner;class A{public static void main(String[] args){Scanner s=new Scanner(System.in);int x=s.nextInt();int y=s.nextInt()+1;for(int i=0;i<x*y;i++){System.out.print(i%y==y-1?"\n":i/y==0||i/y==x-1||i%y==0||i%y==y-2?"*":" ");}}}

stdin

11
46

stdout

**********************************************
*                                            *
*                                            *
*                                            *
*                                            *
*                                            *
*                                            *
*                                            *
*                                            *
*                                            *
**********************************************

stderr