On 03/08, Andrew Morton wrote:
>
> On Fri, 9 Mar 2012 08:46:11 +1100
> Stephen Rothwell <[email protected]> wrote:
>
> > Hi Greg,
> >
> > On Thu, 8 Mar 2012 10:36:15 -0800 Greg KH <[email protected]> 
> > wrote:
> > >
> > > On Mon, Mar 05, 2012 at 09:21:18PM +0900, Tetsuo Handa wrote:
> > > > A patchset from Oleg Nesterov which is in linux-next.git
> > > >
> > > >   kmod: make __request_module() killable
> > > >   kmod: introduce call_modprobe() helper
> > > >   usermodehelper: ____call_usermodehelper() doesn't need do_exit()
> > > >   usermodehelper: implement UMH_KILLABLE
> > > >   usermodehelper: introduce umh_complete(sub_info)
> > > >
> > > > contains killable request_module() code.
> > > > These patches do not have "Cc: <[email protected]> [2.6.11+]" 
> > > > line, but
> > > > distributors might want them because this patchset is needed for 
> > > > preventing
> > > > local memory allocation DoS attacks.
> > >
> > > Thanks for letting me know, I'll watch out for when they hit Linus's
> > > tree in the 3.4-rc1 merge window.
> > >
> > > You wouldn't happen to know the git commit ids for these patches, do
> > > you?  That would help me me tracking them.
> >
> > Unfortunately, these patches are in Andrew's tree and so their commit
> > id's change every day (as his tree is rebased on the rest of linux-next
> > each day).
> >
> > Andrew, should they be marked with Cc: stable?
>
> I'd decided "no", because nobody has hit the bug in the real world and
> the patches are fairly extensive.
>
> Test cases to demonstrate the problem were developed, but they
> involved driving the MM system into oom-killing, and if you have
> hostile unprivileged users who can do that to your machine, you already
> have problems.

I agree, I don't think this is -stable material.

Oleg.

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