Re: [PATCH v3 0/4] mm: clarify nofail memory allocation

[Michal Hocko <mhocko@suse.com>]

On Mon 19-08-24 12:33:17, Linus Torvalds wrote:
> On Mon, 19 Aug 2024 at 12:23, Barry Song <21cnbao@gmail.com> wrote:
> >
> >
> > That could be an exploit taking advantage of those improper callers,
> 
> So?
> 
> FIX THE BUGGY CODE.
> 
> Don't make insane and incorrect changes to the MM code and spread
> Fear, Uncertainty and Doubt.
> 
> > thus it wouldn’t necessarily result in an immediate oops in callers but
> > result in an exploit
> 
> No. Any bug can be an exploit. Don't try to make this something
> special by calling it an exploit.
> 
> NULL pointer dereferences are some of the *least* worrisome bugs,
> because we don't allow people to mmap the NULL area anyway.
> 
> So just stop spreading FUD. We don't improve the kernel by making
> excuses for bugs, we improve it by fixing things.

I really do not think that accusing Barry from spreading FUD is fair!
I believe there is a good intention behind this initiative and he has
used tools that he has available.

So rather than throwing FUD arguments I would really like to stick to a
technical discussion, please.
-- 
Michal Hocko
SUSE Labs