Re: bug in generic strncpy_from_user

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On Thu, Feb 28, 2013 at 04:49:18PM +0100, Heiko Carstens wrote:
> On Thu, Feb 28, 2013 at 05:00:12AM -0800, Greg KH wrote:
> > > It was indeed a bug that caused applications to break.
> > > So I'd like to see your patch 09884964335e "mm: do not grow the stack
> > > vma just because of an overrun on preceding vma" in stable (stable team
> > > added to To: list).
> > 
> > Ok, how far back does the bug go?  Just to 3.8 or earlier?
> 
> It looks like even 2.6.12 has the same behaviour. We were just unlucky that
> in this particular case the ld.so.cache file had a certain layout that this
> was immediatly triggered when "ulimit -s unlimited" was set.
> 
> However before 3.7 it was very unlikely that we would hit the bug. Only since
> we switched address spaces on s390 with 3d5787c9 it became likely. So I'd
> say only 3.7 and 3.8 are relevant.

Ok, as 3.7 is now end-of-life, I'll just queue it up for the next
3.8-stable release.

thanks,

greg k-h
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