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Bug#905574: linux-image-4.17.0-0.bpo.1-amd64: cryptsetup missing in intitramfs for kernel 4.17



Control: tag -1 moreinfo unreproducible

On Mon, 2018-08-06 at 12:38 +0200, H.-Dirk Schmitt wrote:
> Package: src:linux
> Version: 4.17.8-1~bpo9+1
> Severity: critical
> 
> Dear Maintainer,
> 
> after switching 4.16 to 4.17 (strech-backport) my system rendered
> unusable, because the encrypted disk is not unlocked any more.
> The dialog is missing.
> 
> Inspecting the initramfs shows that the cryptsetup related parts are
> missing for 4.17, but still in the 4.16 kernel.
> 
> I was able to mitigate the issue by use the cryptsetup packages from
> buster.

This is strange.  Kernel packages do not determine what goes into the
initramfs.  Sometimes driver modules have been reorganised and this has
resulted in missing modules.  But this wouldn't explain other files
being missing.

I tried to reproduce this by installing a stretch VM with full disk
encryption and then installing this kernel version from backports. 
That produced a working initramfs for me.

- Which version of cryptsetup did you have installed previously?

- If you put "CRYPTSETUP=y" in /etc/cryptsetup-initramfs/conf-hook,
does the older version then build a working initramfs?

Ben.

-- 
Ben Hutchings
Larkinson's Law: All laws are basically false.

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