Re: upstream boot error: KASAN: slab-out-of-bounds Write in virtio_gpu_object_create

[Dmitry Vyukov]

On Mon, Apr 6, 2020 at 3:16 PM Gerd Hoffmann <kraxel@xxxxxxxxxx> wrote:
>
>   Hi,
>
> > > > +drivers/gpu/drm/virtio/virtgpu_object.c maintainers
> > > > Now we have both mainline and linux-next boot broken (linux-next is
> > > > broken for the past 40 days).
> > > > No testing of new code happens.
> > > >
> > > > >  virtio_gpu_object_shmem_init drivers/gpu/drm/virtio/virtgpu_object.c:151 [inline]
> > > > >  virtio_gpu_object_create+0x9f3/0xaa0 drivers/gpu/drm/virtio/virtgpu_object.c:230
> > >
> > > Ah, that one.
> > >
> > > broken patch: f651c8b05542 ("drm/virtio: factor out the sg_table from virtio_gpu_object")
> > > fixed by: 0666a8d7f6a4 ("drm/virtio: fix OOB in virtio_gpu_object_create")
> > >
> > > Both are in drm-misc-next.  I suspect the fix was added after
> > > drm-misc-next was closed for the 5.7 merge window and thus should
> > > have been submitted to drm-misc-next-fixes instead.
> > >
> > > So, what to do now?  Should I cherry-pick 0666a8d7f6a4 into
> > > drm-misc-next-fixes?  Or should it go into drm-misc-fixes instead?
> >
> > Yup cherry-pick it over, with -x, to drm-misc-next-fixes.
> > -Daniel
>
> Done.  So the next linux-next build should be green again.

Linux-next is boot broken with 2 or 3 other bugs for a month. This
won't fix linux-next.