Re: crypto: xts: regression in 4.10

[Marcelo Cerri <marcelo.cerri@canonical.com>]

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What XTS implementations do you have available on /proc/crypto after the
error?

Some drivers that allocate fallback implementations using the older API
started to fail after the generic templates were converted to skcipher.


On Wed, Feb 22, 2017 at 12:17:17AM +0100, Nicolas Porcel wrote:
> Hello,
> 
> I am using aes-xts-plain64 with LUKS headers to crypt the root. In 4.10,
> the partition cannot be opened and I have the following errors when
> booting:
> 
>     device-mapper: table: 253:0: crypt: Error allocating crypto tfm
>     device-mapper: ioctl: error adding target to table
>     device-mapper: reload ioctl on  failed: No such file or directory
>     Failed to setup dm-crypt key mapping for device /dev/mmcblk0p2
>     Check that the kernel supports aes-xts-plain64 cipher (check syslog for more info)
> 
> I found that this commit is responsible for the regression (reverting it
> solves the problem):
> 
> > commit f1c131b45410a202eb45cc55980a7a9e4e4b4f40
> > Author: Herbert Xu <herbert@gondor.apana.org.au>
> > Date:   Tue Nov 22 20:08:19 2016 +0800
> > 
> >     crypto: xts - Convert to skcipher
> 
> Some precision: I am using the vanilla kernel source for 4.10. The aes,
> xts and dm-crypt modules are directly compiled in the kernel and not as
> modules. I also had the same problem with kernel 4.10-rc*.
> 
> Is it a known issue? I found 1 related email with no answer on the
> dm-crypt mailing. If this is a regression, I can start digging, although
> any guidance would be greatly appreciated.
> 
> Thank you in advance,
> 
> Best regards,
> 
> -- 
> Nicolas Porcel

-- 
Regards,
Marcelo


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