Re: bug in generic strncpy_from_user

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On Wed, Feb 27, 2013 at 08:39:20AM -0800, Linus Torvalds wrote:
> On Wed, Feb 27, 2013 at 3:15 AM, Heiko Carstens
> <heiko.carstens@xxxxxxxxxx> wrote:
> >
> > Tested with 64 bit kernel with 64 bit and 31 bit mode user space as well as
> > with 31 bit kernel and 31 bit user space. Each with legacy and flexible
> > mmap layout.
> > The bug is fixed and everything else still seems to work. Thanks!
> >
> > Tested-By: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
> 
> Ok, committed.
> 
> I'm not marking it for stable, because it doesn't seem to matter all
> that much, but if there was some application that actually broke and
> made you notice it that way (as opposed to you just noticing the odd
> memory map), you might want to inform the stable team about commit
> 09884964335e.

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).

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