Re: [PATCH] mm: Add additional consistency check

[Michal Hocko]

On Tue 04-04-17 13:30:22, Michal Hocko wrote:
> On Fri 31-03-17 09:40:28, Kees Cook wrote:
> > As found in PaX, this adds a cheap check on heap consistency, just to
> > notice if things have gotten corrupted in the page lookup.
> >
> > Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx>
> 
> NAK without a proper changelog. Seriously, we do not blindly apply
> changes from other projects without a deep understanding of all
> consequences.

This still seems to be in the mmotm tree
http://www.ozlabs.org/~akpm/mmotm/broken-out/mm-add-additional-consistency-check.patch
I hope we have agreed that this is not the right approach to handle
invalid pointers in kfree and rather go soemthing like
http://lkml.kernel.org/r/20170411141956.GP6729@xxxxxxxxxxxxxx
instead.
-- 
Michal Hocko
SUSE Labs