Re: [Xen-devel] [PATCH] x86: make IDT read-only

[Thomas Gleixner <tglx@xxxxxxxxxxxxx>]

On Mon, 8 Apr 2013, H. Peter Anvin wrote:

> On 04/08/2013 03:43 PM, Kees Cook wrote:
> > This makes the IDT unconditionally read-only. This primarily removes
> > the IDT from being a target for arbitrary memory write attacks. It has
> > an added benefit of also not leaking (via the "sidt" instruction) the
> > kernel base offset, if it has been relocated.
> > 
> > Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx>
> > Cc: Eric Northup <digitaleric@xxxxxxxxxx>
> 
> Also, tglx: does this interfere with your per-cpu IDT efforts?

I don't think so. And it's on the backburner at the moment.

Thanks,

        tglx

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel