Subject: Re: [PATCH] powerpc: Make alignment exception always check exception table

From: Greg KH <[email-masked]>
Date: Tue, 31 Oct 2006 22:34:01 -0800

On Wed, Nov 01, 2006 at 02:09:30PM +1100, Benjamin Herrenschmidt wrote:
> The alignment exception used to only check the exception table for
> -EFAULT, not for other errors. That opens an oops window if we can
> coerce the kernel into getting an alignment exception for other reasons
> in what would normally be a user-protected accessor, which can be done
> via some of the futex ops. This fixes it by always checking the
> exception tables.
> 
> Signed-off-by: Benjamin Herrenschmidt <[email-masked]>
> ---
> 
> This is 2.6.19 material and should probably go into stable as well.
> (Greg: take it if paulus acks it and it applies :)

Please forward the final patch (which ever version it is :) to the
[email-masked] address when this goes into mainline.

thanks,

greg k-h