[PATCH v2 1/2] mm: mmap: Add new /proc tunable for mmap_base ASLR.

Daniel Cashman dcashman at android.com
Wed Nov 4 11:36:07 PST 2015

On 11/4/15 11:21 AM, Eric W. Biederman wrote:
> Michal Hocko <mhocko at kernel.org> writes:
>> On Tue 03-11-15 10:10:03, Daniel Cashman wrote:
>> [...]
>>> +This value can be changed after boot using the
>>> +/proc/sys/kernel/mmap_rnd_bits tunable
>> Why is this not sitting in /proc/sys/vm/ where we already have
>> mmap_min_addr. These two sound like they should sit together, no?
> Ugh.  Yes.  Moving that file before it becomes part of the ABI sounds
> like a good idea.  Daniel when you get around to v3 please move the
> file.

To answer the first question: it was put there because that's where
randomize_va_space is located, which seemed to me to be the
most-related/similar option.  That being said, moving it under vm works
too.  Will change for patch-set 3.

Thank You,

More information about the linux-arm-kernel mailing list