Answer by youfu for How can I temporarily disable ASLR (Address space layout randomization)?

The /proc/sys/kernel/randomize_va_space interface controls ASLR system-wide.

If you don't want a system-wide change, use ADDR_NO_RANDOMIZEpersonality flag to temporarily disable ASLR. Controlling of this flag can be done with setarch and its -R option, like

setarch `uname -m` -R /bin/bash

This will open a new Bash shell for you with ASLR disabled, including all child processes run from this shell. Just exit the shell once you're done.

By the way, on i386, ulimit -s unlimited can effectively "disable" ASLR.

EDIT (Apr 2016): The ulimit -s unlimited was fixed and assigned CVE-2016-3672.