[PATCH 03/48] staging: etnaviv: remove compat MMU code

[Lucas Stach]

Am Mittwoch, den 21.10.2015, 14:37 +0100 schrieb Russell King - ARM
Linux:
> On Wed, Oct 21, 2015 at 02:37:16PM +0200, Lucas Stach wrote:
> > Am Mittwoch, den 21.10.2015, 12:35 +0100 schrieb Russell King - ARM
> > Linux:
> > > On Fri, Sep 25, 2015 at 01:18:48PM +0100, Russell King - ARM Linux wrote:
> > > > On Fri, Sep 25, 2015 at 01:57:15PM +0200, Lucas Stach wrote:
> > > > > There is no point in keeping backwards compatibility to older
> > > > > kernel versions in a driver destined to mainline.
> > > > 
> > > > You are correct, however the repository I keep is always based on the
> > > > previous non-rc kernel release, and I want it to work not only with
> > > > that release, but also the future -rc's as well.  It means that from
> > > > time to time, I will include compatibility across a merge window, but
> > > > I do intend to drop it.
> > > 
> > > I'm not sure what version you've generated this patch against, but I
> > > can't apply it without significant changes to your patch.
> > > 
> > > I think instead, I'm going to create a patch removing the v4.1 code
> > > from my commit myself, and merge it into my original commit as the
> > > 4.1 code is no longer relevant.
> > > 
> > 
> > That's fine with me.
> 
> Applying these patches on top of my drm-etnaviv-devel branch:
> 
> staging: etnaviv: debugfs: add possibility to dump kernel buffer
> staging: etnaviv: change etnaviv_buffer_init() to return prefetch
> staging: etnaviv: remove submit type
> staging: etnaviv: rewrite submit interface to use copy from user
> 
> with the corresponding DDX changes results in a kernel which silently
> locks solid when Xorg starts up.
> 
For the ML records:

As discussed on IRC this is another case of missing input validation
with userspace passing in wrong reloc offsets, the kernel omitting
proper validation and consequently stomping over unrelated memory.


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