linux-kernel - Re: [PATCH] drm: Check for lessee in DROP

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:   Wed, 31 Jan 2018 09:13:43 +0100
From:   Daniel Vetter <daniel@...ll.ch>
To:     Keith Packard <keithp@...thp.com>
Cc:     Daniel Vetter <daniel@...ll.ch>, linux-kernel@...r.kernel.org,
        Dave Airlie <airlied@...hat.com>,
        dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH] drm: Check for lessee in DROP_MASTER ioctl

On Tue, Jan 30, 2018 at 11:55:01AM -0800, Keith Packard wrote:
> Daniel Vetter <daniel@...ll.ch> writes:
> 
> > On Thu, Jan 18, 2018 at 05:51:59PM -0800, Keith Packard wrote:
> >> Don't let a lessee control what the current DRM master is set to;
> >> that's the job of the "real" master. Otherwise, the lessee would
> >> disable all access to master operations for the owner and all lessees
> >> under it.
> >> 
> >> This matches the same check made in the SET_MASTER ioctl.
> >> 
> >> Signed-off-by: Keith Packard <keithp@...thp.com>
> >
> > Similar check for setmaster already exists, so looks all good. Do we have
> > an igt for all this? Iirc there was one floating around, but no idea
> > what's the status. Might also be good to resubmit them so i915 CI can run
> > the tests (now that the code has landed).
> 
> I've got IGT tests for leasing which have been posted to dri-devel but I
> don't think they've been reviewed. Looks like they could use some more
> test cases; I didn't catch this one until I was playing with my 'xlease'
> hack, which runs the X server on a leased FD.

Can you pls resubmit (preferrably with the new nasty tests added) to
igt-dev@...ts.freedesktop.org (we have a new m-l for igt stuff)?

> > On the patch itself, minus lack of testcases:
> >
> > Reviewed-by: Daniel Vetter <daniel.vetter@...ll.ch>
> 
> Thanks!

Realized I should better apply this, and done :-)
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch