[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

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

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.



Xen-devel mailing list



Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.