On Fri, Feb 08, 2019 at 11:39:00AM +0000, 23pieces wrote:

Hello everyone!

It seems since kernelversion 4.20.6 many people have problems mounting their encrypted rootfs while booting.

Trying to investigate i found this commit in 4.20.6: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/driv...

To clarify this issue also persists in 4.20.7 and isn't occuring in 4.20.5.

People having the problem often have something like the following config on their rootfs (including myself): cryptsetup -v --type luks --cipher aes-xts-plain64 --key-size 512 --hash sha512 --iter-time 5000 --use-random --verify-passphrase luksFormat device

I was trying to investigate the code in the commit and playing around with the dmsetup commands mentioned.

Now on a running system with kernel 4.20.6 i get:

dmsetup create test --table "0 8 crypt aes-cbc-essiv:sha3-256 9c1185a5c5e9fc54612808977ee8f5b9e 0 /dev/sdc 0" Works

dmsetup create test --table "0 8 crypt aes-cbc-essiv:sha512 9c1185a5c5e9fc54612808977ee8f5b9e 0 /dev/sdc 0" device-mapper: reload ioctl on test failed: Invalid argument Command failed.

dmsetup create test --table "0 8 crypt aes-xts-plain-64:sha3-256 9c1185a5c5e9fc54612808977ee8f5b9e 0 /dev/sdc 0" device-mapper: reload ioctl on test failed: Invalid argument Command failed.

dmsetup create test --table "0 8 crypt aes-xts-plain-64:sha512 9c1185a5c5e9fc54612808977ee8f5b9e 0 /dev/sdc 0" device-mapper: reload ioctl on test failed: Invalid argument Command failed.

At boot people have the following error: device-mapper: reload ioctl on failed: Invalid argument Failed to setup dm-crypt key mapping for device /dev/disk/by-uuid/UUID Check that kernel supports aes-xts-plain-64 cipher (check syslog for more info)

I don't have a patch for this yet, just wanted to inform you.

Are people also having problems with 5.0-rc5?

thanks,

greg k-h