kernel oops when trying to create filesystems in a dm-crypt plus lvm setup

[Steve Girard]

I'm trying to install kubuntu 9.10 with its alternate install cd for amd64 (2.6.31-14-generic). During the partitioning I go to the console to create my encrypted LVM with dm-crypt:

hdd layout:
/dev/sda1 windows
/dev/sda2 windows
/dev/sda3 /boot
/dev/sda4 extended partition
/dev/sda5 device for encrypted lvm

$ cryptsetup luksFormat -c aes-cbc-essiv:sha256 -s 256 /dev/sda5
$ cryptsetup luksOpen /dev/sda5 sda5_crypt
$ pvcreate vg0 /dev/mapper/sda5_crypt
$ lvcreate -n root -L 10G vg0
$ lvcreate -n swap -L 10G vg0
$ lvcreate -n usr -L 20G vg0
$ lvcreate -n var -L 40G vg0
$ lvcreate -n home -L 80G vg0

After that I create file systems on those created devices.

$ mkfs.ext4 /dev/mapper/vg0-root
$ mkfs.ext4 /dev/mapper/vg0-usr
$ mkfs.ext4 /dev/mapper/vg0-var
$ mkfs.ext4 /dev/mapper/vg0-home

During the creation of filesystem it comes to a kernel oops (it's reproducable, mostly happens at var or home). I don't have any way to copy paste the oops, so I'll attach a photo of it. I typed out the most important messages:

BUG: unable to handle kernel paging request at ....
IP: [...] crypt_dec_pending+0x14/0x90 [dm_crypt]
PGD 21f1a8067 PUD 0
Oops: 0000 [#2] SMP
last sysfs file: /sys/devices/virtual/block/dm-3/uevent

That box is also running windows xp rock stable. So I would not guess on a hardware fault.

[Steve Girard (ich-kjeld)]

Just set the bug invalid. I also get a kernel oops when not using encryption. I will further investigate and open a new bug if needed.