linux-kernel - Re: [PATCH 11/24] uswsusp: Disable when the kernel is locked down

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Message-ID: <alpine.LSU.2.20.1704062224220.28004@cbobk.fhfr.pm>
Date:   Thu, 6 Apr 2017 22:25:38 +0200 (CEST)
From:   Jiri Kosina <jikos@...nel.org>
To:     "Rafael J. Wysocki" <rafael@...nel.org>
cc:     David Howells <dhowells@...hat.com>,
        Oliver Neukum <oneukum@...e.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Matthew Garrett <mjg59@...f.ucam.org>,
        linux-efi@...r.kernel.org, gnomes@...rguk.ukuu.org.uk,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Linux PM <linux-pm@...r.kernel.org>,
        linux-security-module@...r.kernel.org, keyrings@...r.kernel.org,
        Joey Lee <JLee@...e.com>, matthew.garrett@...ula.com
Subject: Re: [PATCH 11/24] uswsusp: Disable when the kernel is locked down

On Thu, 6 Apr 2017, Rafael J. Wysocki wrote:

> >>> Your swap partition may be located on an NVDIMM or be encrypted.
> >>
> >> An NVDIMM should be considered the same as any other persistent storage.
> >>
> >> It may be encrypted, but where's the key stored, how easy is it to retrieve
> >> and does the swapout code know this?
> >>
> >>> Isn't this a bit overly drastic?
> >>
> >> Perhaps, but if it's on disk and it's not encrypted, then maybe not.
> >
> > Right.
> >
> > Swap encryption is not mandatory and I'm not sure how the hibernate
> > code can verify whether or not it is in use.
> 
> BTW, SUSE has patches adding secure boot support to the hibernate code
> and Jiri promised me to post them last year even. :-)

Oh, thanks for a friendly ping :) Adding Joey Lee to CC.

-- 
Jiri Kosina
SUSE Labs