linux-kernel - Re: 2.6.25-rc[1,2]: failed to setup dm-crypt key mapping

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Date:	Wed, 20 Feb 2008 12:23:21 +0100
From:	Milan Broz <mbroz@...hat.com>
To:	Herbert Xu <herbert@...dor.apana.org.au>
CC:	"Michael S. Tsirkin" <m.s.tsirkin@...il.com>,
	Alasdair G Kergon <agk@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>, dm-crypt@...ut.de
Subject: Re: 2.6.25-rc[1,2]: failed to setup dm-crypt key mapping

Michael S. Tsirkin wrote:
> I am booting a thinkpad T60p off of an encrypted disk (with crypto
> modules in initramfs).
> This works fine in 2.6.24, but in both 2.6.25-rc1 and 2.6.25-rc2
> won't boot with the following messages on the console
> (copied by hand, sorry about typos):
>         device-mapper: table: 254:0:crypt
>         Error allocating crypto tfm
>         Failed to setup dm_crypt key mapping.
>         check kernel for support for the aes-cbc-essiv:sha256
>         cipher spec and verify that /dev/sda6 contains at least 133 sectors.
>         Failed to read from storage.
> 
> git bisec points to the following commit:
> 
>         commit 3a7f6c990ad04e6f576a159876c602d14d6f7fef
>         dm crypt: use async crypto
> 
> Reverting commit 3a7f6c990ad04e6f576a159876c602d14d6f7fef
> on top of 2.6.25-rc2 results in a bootable configuration for me.
> 
> .config attached.

It seems that some module dependency was lost, 
dm-crypt with async crypto depends now on crypto_blkcipher module
for this configuration.

Herbert, any following change required for dm-crypt or it is only
crypto subsystem issue?
(With old kernel/dm-crypt it loads "blkcipher" not "crypto_blkcipher",
maybe some initramdisk change required too...)

Milan
--
mbroz@...hat.com

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