aes crypto not loaded by default, modprobe aes fails

[Per Ångström]

I set up an ecryptfs volume some time ago, using aes crypto. Now, nearly six months later, after a few minor kernel upgrades, I'm unable to access the same volume from the same machine; the mount seemingly succeeds but the data remains encrypted. The only apparent anomaly in the mount process is the following:

Select cipher:
 1) aes: blocksize = 16; min keysize = 16; max keysize = 32 (not loaded)

Seeing that aes is not loaded (which I find strange), I try to load aes manually:

# modprobe -v aes
insmod /lib/modules/2.6.35-28-generic/kernel/arch/x86/crypto/aesni-intel.ko
WARNING: Error inserting aesni_intel (/lib/modules/2.6.35-28-generic/kernel/arch/x86/crypto/aesni-intel.ko): No such device
insmod /lib/modules/2.6.35-28-generic/kernel/drivers/crypto/padlock-aes.ko
WARNING: Error inserting padlock_aes (/lib/modules/2.6.35-28-generic/kernel/drivers/crypto/padlock-aes.ko): No such device

But I still get aes "(not loaded)".

# lsmod | grep aes
aes_x86_64 7936 3
aes_generic 27631 1 aes_x86_64

# find /lib/modules/2.6.35-28-generic/ -name 'aes*'
/lib/modules/2.6.35-28-generic/kernel/crypto/aes_generic.ko
/lib/modules/2.6.35-28-generic/kernel/arch/x86/crypto/aes-x86_64.ko
/lib/modules/2.6.35-28-generic/kernel/arch/x86/crypto/aesni-intel.ko

I will go back to an older kernel and see if that works better.

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: linux-image-2.6.35-28-generic 2.6.35-28.50
Regression: Yes
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.35-28.50-generic 2.6.35.11
Uname: Linux 2.6.35-28-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC262 Analog [ALC262 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: pang 1924 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xc0000000 irq 47'
   Mixer name : 'Realtek ALC262'
   Components : 'HDA:10ec0262,18540120,00100002'
   Controls : 19
   Simple ctrls : 12
Date: Sun Jun 19 10:02:07 2011
HibernationDevice: RESUME=UUID=2a4d2eac-9fba-4760-849b-e366ea52a359
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
MachineType: LG Electronics P300-T.APE4V
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-28-generic root=UUID=f3749e3b-5821-4d21-ae59-c77182c19675 ro quiet splash
RelatedPackageVersions: linux-firmware 1.38.6
SourcePackage: linux
dmi.bios.date: 06/30/2008
dmi.bios.vendor: Phoenix Technologies LTD
dmi.bios.version: ELGNSF18
dmi.board.name: ELGON
dmi.board.vendor: LG Electronics
dmi.board.version: Not Applicable
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LG Electronics
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrELGNSF18:bd06/30/2008:svnLGElectronics:pnP300-T.APE4V:pvrNotApplicable:rvnLGElectronics:rnELGON:rvrNotApplicable:cvnLGElectronics:ct10:cvrN/A:
dmi.product.name: P300-T.APE4V
dmi.product.version: Not Applicable
dmi.sys.vendor: LG Electronics

[Per Ångström (autark)]

Kernel 2.6.35-22-generic gives the same problem. Strange!

[Per Ångström (autark)]

I think the problem lies with module aesni_intel.ko not being loadable:

# modprobe -v aesni_intel
insmod /lib/modules/2.6.35-28-generic/kernel/arch/x86/crypto/aesni-intel.ko
FATAL: Error inserting aesni_intel (/lib/modules/2.6.35-28-generic/kernel/arch/x86/crypto/aesni-intel.ko): No such device

From /var/log/messages:
Jun 19 11:31:15 barbaren kernel: [ 2772.272853] Intel AES-NI instructions are not detected.

[Per Ångström (autark)]

Any workaround? I'm sitting here with an unaccessible backup.

[Per Ångström (autark)]

Sorry, my bad! A bad password made me bark up the wrong tree. I am now able to access the encrypted backup.