php, 101 bytes

Result

AC

Duration

1007ms

Code [DL]

<?php $h=+fgets(STDIN);$w=fgets(STDIN)-2;for($y=$h;$y;)echo"*".str_repeat("* "[$y--<$h&&$y],$w)."*
";

stdin

24
58

stdout

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

stderr

PHP Notice:  A non well formed numeric value encountered in /volume/CODE on line 1
PHP Notice:  A non well formed numeric value encountered in /volume/CODE on line 1
PHP Notice:  String offset cast occurred in /volume/CODE on line 1
PHP Notice:  String offset cast occurred in /volume/CODE on line 1
PHP Notice:  String offset cast occurred in /volume/CODE on line 1
PHP Notice:  String offset cast occurred in /volume/CODE on line 1
PHP Notice:  String offset cast occurred in /volume/CODE on line 1
PHP Notice:  String offset cast occurred in /volume/CODE on line 1
PHP Notice:  String offset cast occurred in /volume/CODE on line 1
PHP Notice:  String offset cast occurred in /volume/CODE on line 1
PHP Notice:  String offset cast occurred in /volume/CODE on line 1
PHP Notice:  String offset cast occurred in /volume/CODE on line 1
PHP Notice:  String offset cast occurred in /volume/CODE on line 1
PHP Notice:  String offset cast occurred in /volume/CODE on line 1
PHP Notice:  String offset cast occurred in /volume/CODE on line 1
PHP Notice:  String offset cast occurred in /volume/CODE on line 1
PHP Notice:  String offset cast occurred in /volume/CODE on line 1
PHP Notice:  String offset cast occurred in /volume/CODE on line 1
PHP Notice:  String offset cast occurred in /volume/CODE on line 1
PHP Notice:  String offset cast occurred in /volume/CODE on line 1
PHP Notice:  String offset cast occurred in /volume/CODE on line 1
PHP Notice:  String offset cast occurred in /volume/CODE on line 1
PHP Notice:  String offset cast occurred in /volume/CODE on line 1
PHP Notice:  String offset cast occurred in /volume/CODE on line 1
PHP Notice:  String offset cast occurred in /volume/CODE on line 1
PHP Notice:  String offset cast occurred in /volume/CODE on line 1