linux-kernel - Re: [PATCH v2 0/3] dm-crypt: Adds support for wiping key when doing suspend/hibernation

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Date:	Tue, 7 Jul 2015 09:59:41 +0200
From:	Pali Rohár <pali.rohar@...il.com>
To:	Alasdair Kergon <agk@...hat.com>,
	Mike Snitzer <snitzer@...hat.com>, Neil Brown <neilb@...e.de>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Len Brown <len.brown@...el.com>, Pavel Machek <pavel@....cz>
Cc:	dm-devel@...hat.com, linux-raid@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org
Subject: Re: [PATCH v2 0/3] dm-crypt: Adds support for wiping key when doing
 suspend/hibernation

On Sunday 21 June 2015 13:20:31 Pali Rohár wrote:
> This patch series increase security of suspend and hibernate actions. It allows
> user to safely wipe crypto keys before suspend and hibernate actions starts
> without race conditions on userspace process with heavy I/O.
> 
> To automatically wipe cryto key for <device> before hibernate action call:
> $ dmsetup message <device> 0 key wipe_on_hibernation
> 
> To automatically wipe cryto key for <device> before suspend action call:
> $ dmsetup message <device> 0 key wipe_on_suspend
> 
> To disable automatic wipe call retain_on_suspend/retain_on_hibernation.
> 
> Pali Rohár (3):
>   PM suspend/hibernate: Call notifier after freezing processes
>   dm: Export function dm_suspend_md()
>   dm-crypt: Adds support for wiping key when doing suspend/hibernation
> 
>  drivers/md/dm-crypt.c    |  126 +++++++++++++++++++++++++++++++++++++++++++---
>  drivers/md/dm.c          |    6 +++
>  drivers/md/dm.h          |    5 ++
>  include/linux/suspend.h  |    2 +
>  kernel/power/hibernate.c |    2 +
>  kernel/power/suspend.c   |    4 +-
>  6 files changed, 136 insertions(+), 9 deletions(-)
> 

Hello, can somebody look and review this (v2) patch series?

-- 
Pali Rohár
pali.rohar@...il.com
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