node, 108 bytes

Result

WA

Duration

1575ms

Code [DL]

[a,b]=(0+require(`fs`).readFileSync(i=0)).split`
`for(;i<a;)console.log(`*${'* '[i++&&i<a&1].repeat(b-2)}*`)

stdin

46
43

stdout

stderr

/volume/CODE:2
`for(;i<a;)console.log(`*${'* '[i++&&i<a&1].repeat(b-2)}*`)
 ^^^

SyntaxError: Unexpected token for
    at new Script (vm.js:79:7)
    at createScript (vm.js:251:10)
    at Object.runInThisContext (vm.js:303:10)
    at Module._compile (internal/modules/cjs/loader.js:657:28)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:700:10)
    at Module.load (internal/modules/cjs/loader.js:599:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:538:12)
    at Function.Module._load (internal/modules/cjs/loader.js:530:3)
    at Function.Module.runMain (internal/modules/cjs/loader.js:742:12)
    at startup (internal/bootstrap/node.js:282:19)