Messages in this thread | | | Date | Tue, 14 Apr 2015 08:50:16 +0200 | From | Pavel Machek <> | Subject | Re: [PATCH 0/3] dm-crypt: Adds support for wiping key when doing suspend/hibernation |
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Hi!
> > > > > So proper way is to wipe luks crypto keys *after* userspace processes > > > > > are freezed. > > > > > > > > I know you believe that I'm just not accepting that at face value. > > > > > > If disks are synced before any DM suspend operation then we have higher > > > chance of preventing data corruption. > > > > disks are already synced as part of the DM suspend operation! > > > > Yes, but part of hibernate operation is also sync call.
Yes. Maybe that was a mistake.
> > > I still think that correct order is only: > > > > > > * freeze processes (which doing continous I/O) > > > * fs & disk sync > > > * DM suspend > > > * wipe crypto keys > > > * enter hibernate > > > > I just don't think that extreme is _required_ to have a hibernate/resume > > that incorporates dm-crypt key wiping. > > Ok, and what other developers think?
If someone can fix freezer to work with LUKS stopped, that would be a good thing. Can you do it, Mike? Then we can look if it works well enough for Pali.
But that might be too hard / impossible. And at that point, I think Pali's patch is right thing to do. Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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