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[Bug 1558079] [NEW] cryptsetup tcryptOpen doesn't work anymore


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I'm using cryptsetup to open TrueCrypt encrypted NTFS filesystems:
cryptsetup tcryptOpen /dev/sdf2 tcrypt

At least until linux-image-3.13.0-79-generic this work fine. 
Booting linux-image-3.13.0-83-generic and running cryptsetup results in:

Required kernel crypto interface not available.
Ensure you have algif_skcipher kernel module loaded.

The module algif_skcipher is loaded, so the tenor of the error message
is wrong, but cryptsetup cannot open the container, so at least there
_is_ some error. Probably it's related to some unsupported instruction
set. With  linux-image-3.13.0-83 there are errors in dmesg which are not
present with linux-image-3.13.0-79:

AVX instructions are not detected

System information:

OS: Ubuntu 14.04.4 LTS
CPU: Phenom II X6

TCRYPT header information for /dev/sdf2
Version:       	5
Driver req.:	7
Sector size:	512
MK offset:	131072
PBKDF2 hash:	ripemd160
Cipher chain:	aes
Cipher mode:	xts-plain64
MK bits:       	512

** Affects: linux (Ubuntu)
     Importance: Medium
         Status: Confirmed

** Tags: avx cryptsetup dm-crypt kernel kernel-da-key needs-bisect trusty
cryptsetup tcryptOpen doesn't work anymore
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