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Bug#825141: dasd_mod: module verification failed: signature and/or required key missing - tainting kernel



On Wed, 2016-05-25 at 20:56 -0400, Stephen Powell wrote:
> On Mon, May 23, 2016, at 22:16, Ben Hutchings wrote:
> > On Mon, 2016-05-23 at 21:06 -0400, Stephen Powell wrote:
> > > 
> > > The following message is received at boot time when booting the stock Debian kernel
> > > version 4.5.3-2 on the s390x architecture:
> > > 
> > > dasd_mod: module verification failed: signature and/or required key missing - tainting kernel
> > 
> > This is expected until we sort out support for loading signed modules
> > in unstable.
> > 
> 
> I've done a little research on this.  I haven't checked other architectures,
> but the stock s390x kernel for 4.5.3-2 (and today I also tried 4.5.4-1) has
> 
>    CONFIG_MODULE_SIG=y
>    # CONFIG_MODULE_SIG_ALL is not set
> 
> This seems to be the problem.

But is exactly what's needed for official linux and linux-signed
packages.

[...]
> I have been able to build a successful kernel using make-kpkg with both of the
> above options not set, as well as with both of them set to y.  But the
> combination of options currently used in the stock kernel is problematic
> for these tools.

That's why the config files included in linux-source packages are now
slightly different from those used in official packages.

Ben.

-- 
Ben Hutchings
Usenet is essentially a HUGE group of people passing notes in class.
                      - Rachel Kadel, `A Quick Guide to Newsgroup
Etiquette'

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