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Bug#1105164: linux-image-6.1.0-35-amd64: watchdog kernel module load errors with "Bad message"

Cross-posted to 4 groups.

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Control: severity -1 serious

Hi Robert,

On Mon, May 12, 2025 at 04:38:19PM +0100, Robert Shearman wrote:
> Package: src:linux
> Version: 6.1.137-1
> Severity: important
> X-Debbugs-Cc: rob@graphiant.com
> 
>     rob@graph-dev-bookworm:~$ sudo modprobe watchdog
>     modprobe: ERROR: could not insert 'watchdog': Bad message
> 
> Using extract-module-sig.pl from
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/plain/scripts/extract-module-sig.pl
> shows there is no signature present for the watchdog kernel object
> file:
> 
>     $ ~/Downloads/extract-module-sig.pl -s
> /lib/modules/6.1.0-35-amd64/kernel/drivers/watchdog/watchdog.ko
>     Read 91616 bytes from module file
>     Found magic number at 91616
>     Found PKCS#7/CMS encapsulation
> 
> Compared to 6.1.0-34-amd64 version:
> 
>     $ ~/Downloads/extract-module-sig.pl -s
> /lib/modules/6.1.0-34-amd64/kernel/drivers/watchdog/watchdog.ko
>     Read 92027 bytes from module file
>     Found magic number at 92027
>     Found PKCS#7/CMS encapsulation
>     Found 411 bytes of signature [3082019706092a864886f70d010702a0]
>     ...

So indeed there was likely a temporary problem when doing the signing
of the modules for linux-signed-amd64. There is the watchdog module
and w83977f_wdt one which have zero size signature:

./linux-signed-amd64-6.1.137+1/debian/signatures/linux-image-6.1.0-35-amd64-unsigned/lib/modules/6.1.0-35-amd64/kernel/drivers/watchdog/watchdog.ko.sig
./linux-signed-amd64-6.1.137+1/debian/signatures/linux-image-6.1.0-35-amd64-unsigned/lib/modules/6.1.0-35-amd64/kernel/drivers/watchdog/w83977f_wdt.ko.sig

I checked as well linux-signed-i386 and linux-signed-arm64 but there I
found none with a problem.

Ansgar, assuming at this point we cannot do something anymore for the
point release.

Cyril, Adam, so skip the kernel update for the upcoming point release?

Regards,
Salvatore

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Bug#1105164: linux-image-6.1.0-35-amd64: watchdog kernel module load errors with "Bad message" Salvatore Bonaccorso <carnil@debian.org> - 2025-05-12 22:40 +0200
  Bug#1105164: linux-image-6.1.0-35-amd64: watchdog kernel module load errors with "Bad message" Salvatore Bonaccorso <carnil@debian.org> - 2025-05-12 23:10 +0200
    Bug#1105164: linux-image-6.1.0-35-amd64: watchdog kernel module load errors with "Bad message" Jonathan Wiltshire <jmw@debian.org> - 2025-05-12 23:30 +0200
      Bug#1105164: linux-image-6.1.0-35-amd64: watchdog kernel module load errors with "Bad message" Cyril Brulebois <kibi@debian.org> - 2025-05-13 00:00 +0200
  Bug#1105164: linux-image-6.1.0-35-amd64: watchdog kernel module load errors with "Bad message" Salvatore Bonaccorso <carnil@debian.org> - 2025-05-17 09:00 +0200

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