Re: [PATCH 0/5] i387: stable kernel backport

Greg Kroah-Hartman
2012-02-22T21:34:22Z

On Wed, Feb 22, 2012 at 01:29:11PM -0800, Linus Torvalds wrote:
> On Wed, Feb 22, 2012 at 1:19 PM, Greg Kroah-Hartman
> <gregkh@linuxfoundation.org> wrote:
> >
> > Thanks for doing the backport.  Any ideas on how far back this problem
> > goes?
>
> The fundamental bug goes back forever, but happily afaik you can only
> *trigger* it by doing FPU accesses from interrupts, and nobody did
> that until the AES-NI instructions came about.
>
> So practically speaking it goes back to the introduction of
> CRYPTO_AES_NI_INTEL, in commit 54b6a1bd5364 ("crypto: aes-ni - Add
> support to Intel AES-NI instructions for x86_64 platform").
>
> Which was merged into 2.6.30. So it still goes back pretty far.
>
> The good news is that I *think* the whole i387 handling code hasn't
> been touched much. But I didn't really check deeply.

Ok, I'll see how far back I can backport it easily, after Peter verifies
that this series works for him on his box.

thanks,

greg k-h