Re: What's going on with dm-crypt?!
> I have / on a luks volume, mounted with dm-crypt (automatically,
> via /etc/fstab - /etc/crypttab). As recently as kernel 4.18.0-3,
> everything was normal. With 4.19.0-1-amd64, the volume mounts, and the
> system seems basically functional - but /dev/mapper is empty besides for
> ~# ls -al /dev/mapper/
> total 0
> drwxr-xr-x 2 root root 60 Dec 23 23:32 .
> drwxr-xr-x 18 root root 3340 Dec 23 23:32 ..
> crw------- 1 root root 10, 236 Dec 23 23:32 control
> Despite the fact that 'mount' shows that the dm-crypt mount is present:
> ~# mount | grep sda
> /dev/mapper/sda2_crypt on / type ext4 (rw,relatime,errors=remount-ro)
> /dev/sda1 on /boot type ext4 (rw,relatime)
> This situation causes update-initramfs to fail:
> ~# update-initramfs -u
> update-initramfs: Generating /boot/initrd.img-4.19.0-1-amd64
> mkinitramfs: failed to determine device for /
> mkinitramfs: workaround is MODULES=most, check:
> grep -r MODULES /etc/initramfs-tools
> Error please report bug on initramfs-tools
> Include the output of 'mount' and 'cat /proc/mounts'
> update-initramfs: failed for /boot/initrd.img-4.19.0-1-amd64 with 1.
> Which is causing things like updating kernels to fail ...
> What on earth is going on here?
This might be the kernel bug introduced in 4.18:
which will be fixed. Check the thread.
In the meantime, go back to an earlier kernel.