Re: [External] Re: [PATCH] mm: memcontrol: Fix out-of-bounds on the buf returned by memory_stat_format

[Michal Hocko]

On Mon 14-09-20 12:02:33, Muchun Song wrote:
> On Sun, Sep 13, 2020 at 8:42 AM Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> wrote:
> >
> > On Sat, 12 Sep 2020 23:51:00 +0800 Muchun Song <songmuchun@xxxxxxxxxxxxx> wrote:
> >
> > > The memory_stat_format() returns a format string, but the return buf
> > > may not including the trailing '\0'. So the users may read the buf
> > > out of bounds.
> >
> > That sounds serious.  Is a cc:stable appropriate?
> >
> 
> Yeah, I think we should cc:stable.

Is this a real problem? The buffer should contain 36 lines which makes
it more than 100B per line. I strongly suspect we are not able to use
that storage up.
-- 
Michal Hocko
SUSE Labs