Re: [patch 0/5] Support for sanitization flag in low-level page allocator

Pavel Machek
2009-05-26T19:03:40Z

Hi!

> > I could also imagine the suspend-to-disk code skipping
> > PG_sensitive pages when storing data to disk, and
> > replacing it with some magic signature so programs
> > that use special PG_sensitive buffers can know that
> > their crypto key disappeared after a restore.
>
> Its irrelevant in the simple S2D case. I just patch other bits of the
> suspend image to mail me the new key later. The right answer is crypted
> swap combined with a hard disk password and thus a crypted and locked
> suspend image. Playing the "I must not miss any page which might be

uswsusp does have internal encryption, and can use dm_crypt encrypted
swap... So yes, we can do encrypted swap & s2disk today.
Pavel
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