Since we have read acces to randomize_va_space, we can use the Linux cat command to display a file (and a pseudo file):

        $ cat /proc/sys/kernel/randomize_va_space
     

The output goes to standard output. Its value is probably not 0. That means that the stack position will be randomized on each execution.

We could try to change its value by

        $ cat >/proc/sys/kernel/randomize_va_space
          0
          ctrl-d
     

But to do so you would need to "be" (i.e. login as ) the root user. Bummer!