fix: memory: use rigth index and addr, add page to pt before write it

src/kernel.c

@@ -36,9 +36,6 @@ void kernel_main(void)
 	        "I see no way to confuse an array of 256 seg:off pairs with a "
 	        "complex 8*unknown quantity -byte descriptor table. -- Troy "
 	        "Martin 03:50, 22 March 2009 (UTC)\n");
-	char *str = vmalloc(10);
-	if (str)
-		strcpy(str, "hello");
 	/* int i = 0; */
 	/* while (vmalloc(10)) */
 	/* 	; */