lkml.org 
[lkml]   [2009]   [Aug]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [pkg-cryptsetup-devel] Bug#541835: crypto configuration / dependencies broken
hey,

On 30/08/2009 Sebastian Andrzej Siewior wrote:
> * Sebastian Andrzej Siewior | 2009-08-28 10:00:56 [+0200]:
>
> >>> the problem is not reproducible with a debian/unstable 2.6.30.6 kernel,
> >>> even though it has cbc compiled as module as well. but if I recompile
> >>> the same kernel sources with Celejars kernel .config, the problem
> >>> occurs. thus it must be related to the kernel config in some way.
> >It must be the kernel confing since I run .30.stable and it works. I try
> >to look at it later.
>
> Your kernel config is fine, the problem is that the initramfs tools do
> not copy all of the required modules into the initramfs. The missing
> modles are:
> - cryptomgr: that one is responsible to load the cbc and aes module and
> bind them to cbc(aes)
> - chainiv: that one creates IVs if the "user" does not specify one.
> dm-crypt probably does not use that one but is required due to the way
> crypto works atm.
> - krng: provides random numbers and is required by chainiv.
>
> If you add those three to /etc/initramfs/modules than it should work.
>
> Could someone please look at initramfs to figure out why those three
> modules are not copied in this reduced setup?

the reason is simply that no other crypto modules define depends on the
listed ones:

# modinfo -F depends dm-crypt
dm-mod,crypto_blkcipher

# modinfo -F aes_generic sha256_generic cbc
crypto_algapi
crypto_hash
crypto_algapi,crypto_blkcipher

# modinfo -F crypto_blkcipher crypto_hash
crypto_algapi
crypto_algapi

and even the new modules don't depend on each other:

# modinfo -F cryptomgr
crypto_hash,crypto_algapi,crypto_blkcipher,aead,pcompress

# modinfo -F chainiv
crypto_algapi,rng,crypto_wq,crypto_blkcipher

# modinfo -F krng
rng,crypto_algapi

so the following depends should be added/changed:

- chainiv should depend o 'krng' instead of 'rng' at least
- maybe cipher modules like aes,serpent,... should depend on 'cryptomgr'
instead of 'crypto_algapi'
- crypto_algapi should depend on chainiv

these changes are pure guesses, i don't know the details. but at least
additional depends need to be defined for crypto modules, don't you
think so?

greetings,
jonas


\
 
 \ /
  Last update: 2009-08-31 17:55    [W:0.061 / U:0.848 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site