[GIT,PULL] fbdev fixes for v6.2-rc3

  Hi Linus,

please pull the fbdev driver updates for 6.2-rc3, to receive
fixes for matroxfb, offb, omapfb and fbmem.

Thanks,
Helge

----

The following changes since commit 1b929c02afd37871d5afb9d498426f83432e71c2:

  Linux 6.2-rc1 (2022-12-25 13:41:39 -0800)

are available in the Git repository at:

  http://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev.git tags/fbdev-for-6.2-rc3

for you to fetch changes up to 764043cccd7232a783753a612d628fc0cb7854be:

  fbdev: omapfb: avoid stack overflow warning (2023-01-04 19:09:40 +0100)

----------------------------------------------------------------
fbdev updates for kernel 6.2-rc3:

- Fix Matrox G200eW initialization failure
- Fix build failure of offb driver when built as module
- Optimize stack usage in omapfb
- Prevent use-after-free in fbmem

----------------------------------------------------------------
Arnd Bergmann (1):
      fbdev: omapfb: avoid stack overflow warning

Hang Zhang (1):
      fbdev: fbmem: prevent potential use-after-free issues with console_lock()

Paul Menzel (1):
      fbdev: matroxfb: G200eW: Increase max memory from 1 MB to 16 MB

Randy Dunlap (1):
      fbdev: make offb driver tristate

Xu Panda (2):
      fbdev: omapfb: use strscpy() to instead of strncpy()
      fbdev: atyfb: use strscpy() to instead of strncpy()

 drivers/video/fbdev/Kconfig                |  4 ++--
 drivers/video/fbdev/aty/atyfb_base.c       |  3 +--
 drivers/video/fbdev/core/fbmem.c           |  2 ++
 drivers/video/fbdev/matrox/matroxfb_base.c |  4 ++--
 drivers/video/fbdev/omap/omapfb_main.c     |  5 ++---
 drivers/video/fbdev/omap2/omapfb/dss/dsi.c | 28 ++++++++++++++++++----------
 6 files changed, 27 insertions(+), 19 deletions(-)
  

On Thu, 5 Jan 2023 at 09:14, Helge Deller <deller@gmx.de> wrote:
>
> Hi Linus,
>
> please pull the fbdev driver updates for 6.2-rc3, to receive
> fixes for matroxfb, offb, omapfb and fbmem.
>
> Thanks,
> Helge
>
> ----
>
> The following changes since commit 1b929c02afd37871d5afb9d498426f83432e71c2:
>
>   Linux 6.2-rc1 (2022-12-25 13:41:39 -0800)
>
> are available in the Git repository at:
>
>   http://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev.git tags/fbdev-for-6.2-rc3
>
> for you to fetch changes up to 764043cccd7232a783753a612d628fc0cb7854be:
>
>   fbdev: omapfb: avoid stack overflow warning (2023-01-04 19:09:40 +0100)
>
> ----------------------------------------------------------------
> fbdev updates for kernel 6.2-rc3:
>
> - Fix Matrox G200eW initialization failure
> - Fix build failure of offb driver when built as module
> - Optimize stack usage in omapfb
> - Prevent use-after-free in fbmem
>
> ----------------------------------------------------------------
> Arnd Bergmann (1):
>       fbdev: omapfb: avoid stack overflow warning
>
> Hang Zhang (1):
>       fbdev: fbmem: prevent potential use-after-free issues with console_lock()

I looked at this, and even by fbdev locking standards this makes
absolutely no sense to me. I think this should be dropped before we've
reached some sort of conclusion on what is going on, or whether this
is just pure static checker conjecture without fully understanding how
this is supposed to work really.
-Daniel

> Paul Menzel (1):
>       fbdev: matroxfb: G200eW: Increase max memory from 1 MB to 16 MB
>
> Randy Dunlap (1):
>       fbdev: make offb driver tristate
>
> Xu Panda (2):
>       fbdev: omapfb: use strscpy() to instead of strncpy()
>       fbdev: atyfb: use strscpy() to instead of strncpy()
>
>  drivers/video/fbdev/Kconfig                |  4 ++--
>  drivers/video/fbdev/aty/atyfb_base.c       |  3 +--
>  drivers/video/fbdev/core/fbmem.c           |  2 ++
>  drivers/video/fbdev/matrox/matroxfb_base.c |  4 ++--
>  drivers/video/fbdev/omap/omapfb_main.c     |  5 ++---
>  drivers/video/fbdev/omap2/omapfb/dss/dsi.c | 28 ++++++++++++++++++----------
>  6 files changed, 27 insertions(+), 19 deletions(-)
  

On 1/5/23 11:22, Daniel Vetter wrote:
> On Thu, 5 Jan 2023 at 09:14, Helge Deller <deller@gmx.de> wrote:
>>
>> Hi Linus,
>>
>> please pull the fbdev driver updates for 6.2-rc3, to receive
>> fixes for matroxfb, offb, omapfb and fbmem.
>>
>> Thanks,
>> Helge
>>
>> ----
>>
>> The following changes since commit 1b929c02afd37871d5afb9d498426f83432e71c2:
>>
>>    Linux 6.2-rc1 (2022-12-25 13:41:39 -0800)
>>
>> are available in the Git repository at:
>>
>>    http://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev.git tags/fbdev-for-6.2-rc3
>>
>> for you to fetch changes up to 764043cccd7232a783753a612d628fc0cb7854be:
>>
>>    fbdev: omapfb: avoid stack overflow warning (2023-01-04 19:09:40 +0100)
>>
>> ----------------------------------------------------------------
>> fbdev updates for kernel 6.2-rc3:
>>
>> - Fix Matrox G200eW initialization failure
>> - Fix build failure of offb driver when built as module
>> - Optimize stack usage in omapfb
>> - Prevent use-after-free in fbmem
>>
>> ----------------------------------------------------------------
>> Arnd Bergmann (1):
>>        fbdev: omapfb: avoid stack overflow warning
>>
>> Hang Zhang (1):
>>        fbdev: fbmem: prevent potential use-after-free issues with console_lock()
>
> I looked at this, and even by fbdev locking standards this makes
> absolutely no sense to me. I think this should be dropped before we've
> reached some sort of conclusion on what is going on, or whether this
> is just pure static checker conjecture without fully understanding how
> this is supposed to work really.
> -Daniel

Sure.

I'll send a new pull request where this patch is dropped.

Thanks!
Helge


>
>> Paul Menzel (1):
>>        fbdev: matroxfb: G200eW: Increase max memory from 1 MB to 16 MB
>>
>> Randy Dunlap (1):
>>        fbdev: make offb driver tristate
>>
>> Xu Panda (2):
>>        fbdev: omapfb: use strscpy() to instead of strncpy()
>>        fbdev: atyfb: use strscpy() to instead of strncpy()
>>
>>   drivers/video/fbdev/Kconfig                |  4 ++--
>>   drivers/video/fbdev/aty/atyfb_base.c       |  3 +--
>>   drivers/video/fbdev/core/fbmem.c           |  2 ++
>>   drivers/video/fbdev/matrox/matroxfb_base.c |  4 ++--
>>   drivers/video/fbdev/omap/omapfb_main.c     |  5 ++---
>>   drivers/video/fbdev/omap2/omapfb/dss/dsi.c | 28 ++++++++++++++++++----------
>>   6 files changed, 27 insertions(+), 19 deletions(-)
>
>
>
  

On Thu, 5 Jan 2023 at 11:31, Helge Deller <deller@gmx.de> wrote:
>
> On 1/5/23 11:22, Daniel Vetter wrote:
> > On Thu, 5 Jan 2023 at 09:14, Helge Deller <deller@gmx.de> wrote:
> >>
> >> Hi Linus,
> >>
> >> please pull the fbdev driver updates for 6.2-rc3, to receive
> >> fixes for matroxfb, offb, omapfb and fbmem.
> >>
> >> Thanks,
> >> Helge
> >>
> >> ----
> >>
> >> The following changes since commit 1b929c02afd37871d5afb9d498426f83432e71c2:
> >>
> >>    Linux 6.2-rc1 (2022-12-25 13:41:39 -0800)
> >>
> >> are available in the Git repository at:
> >>
> >>    http://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev.git tags/fbdev-for-6.2-rc3
> >>
> >> for you to fetch changes up to 764043cccd7232a783753a612d628fc0cb7854be:
> >>
> >>    fbdev: omapfb: avoid stack overflow warning (2023-01-04 19:09:40 +0100)
> >>
> >> ----------------------------------------------------------------
> >> fbdev updates for kernel 6.2-rc3:
> >>
> >> - Fix Matrox G200eW initialization failure
> >> - Fix build failure of offb driver when built as module
> >> - Optimize stack usage in omapfb
> >> - Prevent use-after-free in fbmem
> >>
> >> ----------------------------------------------------------------
> >> Arnd Bergmann (1):
> >>        fbdev: omapfb: avoid stack overflow warning
> >>
> >> Hang Zhang (1):
> >>        fbdev: fbmem: prevent potential use-after-free issues with console_lock()
> >
> > I looked at this, and even by fbdev locking standards this makes
> > absolutely no sense to me. I think this should be dropped before we've
> > reached some sort of conclusion on what is going on, or whether this
> > is just pure static checker conjecture without fully understanding how
> > this is supposed to work really.
> > -Daniel
>
> Sure.
>
> I'll send a new pull request where this patch is dropped.

Thanks a lot!
-Daniel

>
> Thanks!
> Helge
>
>
> >
> >> Paul Menzel (1):
> >>        fbdev: matroxfb: G200eW: Increase max memory from 1 MB to 16 MB
> >>
> >> Randy Dunlap (1):
> >>        fbdev: make offb driver tristate
> >>
> >> Xu Panda (2):
> >>        fbdev: omapfb: use strscpy() to instead of strncpy()
> >>        fbdev: atyfb: use strscpy() to instead of strncpy()
> >>
> >>   drivers/video/fbdev/Kconfig                |  4 ++--
> >>   drivers/video/fbdev/aty/atyfb_base.c       |  3 +--
> >>   drivers/video/fbdev/core/fbmem.c           |  2 ++
> >>   drivers/video/fbdev/matrox/matroxfb_base.c |  4 ++--
> >>   drivers/video/fbdev/omap/omapfb_main.c     |  5 ++---
> >>   drivers/video/fbdev/omap2/omapfb/dss/dsi.c | 28 ++++++++++++++++++----------
> >>   6 files changed, 27 insertions(+), 19 deletions(-)
> >
> >
> >
>
  

On Thu, 5 Jan 2023 at 11:22, Daniel Vetter <daniel@ffwll.ch> wrote:
>
> On Thu, 5 Jan 2023 at 09:14, Helge Deller <deller@gmx.de> wrote:
> >
> > Hi Linus,
> >
> > please pull the fbdev driver updates for 6.2-rc3, to receive
> > fixes for matroxfb, offb, omapfb and fbmem.
> >
> > Thanks,
> > Helge
> >
> > ----
> >
> > The following changes since commit 1b929c02afd37871d5afb9d498426f83432e71c2:
> >
> >   Linux 6.2-rc1 (2022-12-25 13:41:39 -0800)
> >
> > are available in the Git repository at:
> >
> >   http://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev.git tags/fbdev-for-6.2-rc3
> >
> > for you to fetch changes up to 764043cccd7232a783753a612d628fc0cb7854be:
> >
> >   fbdev: omapfb: avoid stack overflow warning (2023-01-04 19:09:40 +0100)
> >
> > ----------------------------------------------------------------
> > fbdev updates for kernel 6.2-rc3:
> >
> > - Fix Matrox G200eW initialization failure
> > - Fix build failure of offb driver when built as module
> > - Optimize stack usage in omapfb
> > - Prevent use-after-free in fbmem
> >
> > ----------------------------------------------------------------
> > Arnd Bergmann (1):
> >       fbdev: omapfb: avoid stack overflow warning
> >
> > Hang Zhang (1):
> >       fbdev: fbmem: prevent potential use-after-free issues with console_lock()
>
> I looked at this, and even by fbdev locking standards this makes
> absolutely no sense to me. I think this should be dropped before we've
> reached some sort of conclusion on what is going on, or whether this
> is just pure static checker conjecture without fully understanding how
> this is supposed to work really.

Just to close this: Turned out to be some kind of static checker dud
(and unfortunately the commit message didn't even explain that it was
found through some undisclosed static checker, I asked the submitter
to rectify this going forward since they'll likely submit more stuff
like this).
-Daniel

> > Paul Menzel (1):
> >       fbdev: matroxfb: G200eW: Increase max memory from 1 MB to 16 MB
> >
> > Randy Dunlap (1):
> >       fbdev: make offb driver tristate
> >
> > Xu Panda (2):
> >       fbdev: omapfb: use strscpy() to instead of strncpy()
> >       fbdev: atyfb: use strscpy() to instead of strncpy()
> >
> >  drivers/video/fbdev/Kconfig                |  4 ++--
> >  drivers/video/fbdev/aty/atyfb_base.c       |  3 +--
> >  drivers/video/fbdev/core/fbmem.c           |  2 ++
> >  drivers/video/fbdev/matrox/matroxfb_base.c |  4 ++--
> >  drivers/video/fbdev/omap/omapfb_main.c     |  5 ++---
> >  drivers/video/fbdev/omap2/omapfb/dss/dsi.c | 28 ++++++++++++++++++----------
> >  6 files changed, 27 insertions(+), 19 deletions(-)
>
>
>
> --
> Daniel Vetter
> Software Engineer, Intel Corporation
> http://blog.ffwll.ch
  

On 1/9/23 11:26, Daniel Vetter wrote:
> On Thu, 5 Jan 2023 at 11:22, Daniel Vetter <daniel@ffwll.ch> wrote:
>>
>> On Thu, 5 Jan 2023 at 09:14, Helge Deller <deller@gmx.de> wrote:
>>>
>>> Hi Linus,
>>>
>>> please pull the fbdev driver updates for 6.2-rc3, to receive
>>> fixes for matroxfb, offb, omapfb and fbmem.
>>>
>>> Thanks,
>>> Helge
>>>
>>> ----
>>>
>>> The following changes since commit 1b929c02afd37871d5afb9d498426f83432e71c2:
>>>
>>>    Linux 6.2-rc1 (2022-12-25 13:41:39 -0800)
>>>
>>> are available in the Git repository at:
>>>
>>>    http://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev.git tags/fbdev-for-6.2-rc3
>>>
>>> for you to fetch changes up to 764043cccd7232a783753a612d628fc0cb7854be:
>>>
>>>    fbdev: omapfb: avoid stack overflow warning (2023-01-04 19:09:40 +0100)
>>>
>>> ----------------------------------------------------------------
>>> fbdev updates for kernel 6.2-rc3:
>>>
>>> - Fix Matrox G200eW initialization failure
>>> - Fix build failure of offb driver when built as module
>>> - Optimize stack usage in omapfb
>>> - Prevent use-after-free in fbmem
>>>
>>> ----------------------------------------------------------------
>>> Arnd Bergmann (1):
>>>        fbdev: omapfb: avoid stack overflow warning
>>>
>>> Hang Zhang (1):
>>>        fbdev: fbmem: prevent potential use-after-free issues with console_lock()
>>
>> I looked at this, and even by fbdev locking standards this makes
>> absolutely no sense to me. I think this should be dropped before we've
>> reached some sort of conclusion on what is going on, or whether this
>> is just pure static checker conjecture without fully understanding how
>> this is supposed to work really.
>
> Just to close this: Turned out to be some kind of static checker dud
> (and unfortunately the commit message didn't even explain that it was
> found through some undisclosed static checker, I asked the submitter
> to rectify this going forward since they'll likely submit more stuff
> like this).
> -Daniel

Thank you, Daniel!

Helge