Fwd: Linux 6.3.1 + AMD RX 570 on ppc64le 4K: Kernel attempted to read user page (1128) - exploit attempt? (uid: 0)

[Alex Deucher]

On Sat, May 13, 2023 at 12:11 PM Greg Kroah-Hartman
<gregkh at linuxfoundation.org> wrote:
>
> On Fri, May 12, 2023 at 03:25:47PM +0000, Christophe Leroy wrote:
> >
> >
> > Le 12/05/2023 à 17:16, Christophe Leroy a écrit :
> > >
> > >
> > > Le 11/05/2023 à 19:25, Niccolò Belli a écrit :
> > >> [Vous ne recevez pas souvent de courriers de
> > >> darkbasic at linuxsystems.it. D?couvrez pourquoi ceci est important ?
> > >> https://aka.ms/LearnAboutSenderIdentification ]
> > >>
> > >> Il 2023-05-12 10:32 Bagas Sanjaya ha scritto:
> > >>> #regzbot introduced: f4f3b7dedbe849
> > >>> #regzbot link: https://gitlab.freedesktop.org/drm/amd/-/issues/2553
> > >>
> > >> It doesn't look like the aforementioned patch made its way into 6.3 yet:
> > >>
> > >> niko at talos2 ~/devel/linux-stable $ git branch
> > >> * linux-6.3.y
> > >>    master
> > >> niko at talos2 ~/devel/linux-stable $ git show f4f3b7dedbe8 | patch -p1
> > >> patching file
> > >> drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
> > >> Hunk #1 succeeded at 227 (offset 15 lines).
> > >> Hunk #2 succeeded at 269 with fuzz 2 (offset 19 lines).
> > >> patching file
> > >> drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.h
> > >> Hunk #1 succeeded at 49 with fuzz 2 (offset 15 lines).
> > >
> > > As far as I can see that patch has no Fixes: tag, so it will unlikely be
> > > automatically merged into stable.
> > >
> > > Has anybody requested greg/sasha to get it into 6.3 ?
> > >
> >
> > In fact, it seems that patch is already part of 6.3:
> >
> > $ git tag --contains f4f3b7dedbe8
> > v6.3
> > v6.3-rc5
> > v6.3-rc6
> > v6.3-rc7
> > v6.3.1
> > v6.3.2
> > v6.4-rc1
>
> And that commit is already in the following releases:
>         5.10.177 5.15.106 6.1.23 6.2.10 6.3
>
> So what needs to be done here?

Nothing needs to be done here.  We still don't know what the problem
is.  We are working on the issue on:
https://gitlab.freedesktop.org/drm/amd/-/issues/2553
Let's just track it there.  This email thread is just causing confusion.

Alex

>
> confused,
>
> greg k-h