Bug#1122106: linux-image-amd64: UBSAN create a systematic trace in DRM driver

[Eric <eric.4.debian@grabatoulnz.fr>]

Hi,

Le 11/12/2025 à 15:00, Eric a écrit :
> Hi
>
> Le 11/12/2025 à 12:02, Salvatore Bonaccorso a écrit :
> > Hi,
> >
> > On Thu, Dec 11, 2025 at 10:24:42AM +0100, Eric Valette wrote:
> > > On 12/10/25 20:45, Salvatore Bonaccorso wrote:
> > > > Control: tags -1 + moreinfo
> > > >
> > > > Hi,
> > >
> > > > Alex Deucher proposed there two changes, can you test those please and
> > > > report back if they work? If so can you please directly confirm in the
> > > > upstream issue which fixes it and report back here as well?
> > >
> > > Well. Compiling a debian kernel on this machine will requires 
> > > several hours.
> > > Will eventually do. I will report if I do.
> > FWIW, if you come to it, the following should help to just make a
> > build with a patch on top:
> >
> > https://kernel-team.pages.debian.net/kernel-handbook/ch-common-tasks.html#id-1.6.6.4 
> Thanks for this. I'll give it a try and report here.
So, I tried both patches. The first failed to compile with this message :


In file included from drivers/gpu/drm/radeon/atombios.h:7979,

                 from drivers/gpu/drm/radeon/atom.h:165,
                 from drivers/gpu/drm/radeon/radeon_device.c:48:
drivers/gpu/drm/radeon/pptable.h:453:11: error: ‘counted_by’ argument is 
not an identifier
  453 |     UCHAR clockInfo[] __counted_by(ucNumEntries * ucEntrySize);
      |           ^~~~~~~~~
make[9]: *** [scripts/Makefile.build:292: 
drivers/gpu/drm/radeon/radeon_device.o] Error 1
make[8]: *** [scripts/Makefile.build:561: drivers/gpu/drm/radeon] Error 2
make[8]: *** Attente des tâches non terminées....
make[7]: *** [scripts/Makefile.build:561: drivers/gpu/drm] Error 2
make[6]: *** [scripts/Makefile.build:561: drivers/gpu] Error 2
make[6]: *** Attente des tâches non terminées....
make[5]: *** [scripts/Makefile.build:561: drivers] Error 2
make[4]: *** [Makefile:2035: .] Error 2
make[3]: *** [debian/rules:80: build-arch] Error 2
dpkg-buildpackage: erreur: le sous-processus make -f debian/rules binary 
a retourné l’état de sortie 2
make[2]: *** [scripts/Makefile.package:126: bindeb-pkg] Error 2
make[1]: *** [/home/eric/linux-6.17.9/Makefile:1667: bindeb-pkg] Error 2

make: *** [Makefile:260: __sub-make] Error 2


The second patch suppressed the message.


> > Regards,
> > Salvatore
Regards


Eric Dégenètais