Re: bug in generic strncpy_from_user

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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.

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