Re: [RFC] Second attempt at kernel secure boot support

From: Alan Cox
Date: Wed Oct 31 2012 - 13:34:10 EST


On Wed, 31 Oct 2012 17:17:43 +0000
Matthew Garrett <mjg59@xxxxxxxxxxxxx> wrote:

> On Wed, Oct 31, 2012 at 05:21:21PM +0000, Alan Cox wrote:
> > On Wed, 31 Oct 2012 17:10:48 +0000
> > Matthew Garrett <mjg59@xxxxxxxxxxxxx> wrote:
> > > The kernel is signed. The kernel doesn't check the signature on the
> > > suspend image.
> >
> > Which doesn't matter. How are you going to create the tampered image in
> > the first place ?
>
> By booting a signed kernel, not turning on swap and writing directly to
> the swap partition.

Ok so the actual problem is that you are signing kernels that allow the
user to skip the S4 resume check ?
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