I'd be surprised in the patch[1] made any difference on Radeon systems.
The code there is really only related to udev probing.
There was a large jump in the ati driver from 7.5 to 7.6. My initial
thoughts are in that direction...
Pat
[1]
https://gitlab.freedesktop.org/xorg/xserver/commit/0816e8fca6194dfb4cc94c3a7fcb2c7f2a921386
On 12/3/18 11:29 AM, Gilles Detillieux wrote:
Thanks for the feedback, Andreas. That saves me some testing time. It
looks like the security bug
(https://urldefense.proofpoint.com/v2/url?u=https-3A__access.redhat.com_security_cve_cve-2D2018-2D14665&d=DwIDbA&c=gRgGjJ3BkIsb5y6s49QqsA&r=gd8BzeSQcySVxr0gDWSEbN-P-pgDXkdyCtaMqdCgPPdW1cyL5RIpaIYrCn8C5x2A&m=VStRhNQ03emrmYLjFAIDre-xzZT0Ho_w1biFWTQSbtc&s=pGQ8kJ1ceFEdtE90n9wkzNyf0BcBKbllIvhnPdeLWjc&e=)
needs physical access to the console to exploit. Fortunately that
shouldn't be a problem in our environment, where the users are more
interested in hacking neurons.
I noticed in the Errata message for the xorg-x11-server update, it
says "The SL Team added a fix for upstream bug 1650634". I'm wondering
if this bug fix
(https://urldefense.proofpoint.com/v2/url?u=https-3A__bugzilla.redhat.com_show-5Fbug.cgi-3Fid-3D1650634&d=DwIDbA&c=gRgGjJ3BkIsb5y6s49QqsA&r=gd8BzeSQcySVxr0gDWSEbN-P-pgDXkdyCtaMqdCgPPdW1cyL5RIpaIYrCn8C5x2A&m=VStRhNQ03emrmYLjFAIDre-xzZT0Ho_w1biFWTQSbtc&s=vz7Ui2PF_YcxXFRgPhPceXRL1HuDpy8255vaqI-vmbE&e=)
broke things for the Radeon drivers. Seems a more likely cause than
the CVE fix for an argument handling issue. That fix was to support
the SL 7.6 upgrade on nVidia hardware. I'll have to see if the 7.6
upgrade (now available) makes the problem go away for the radeon 3000.
If not, I'll likely downgrade Xorg to 1.19 on our systems till I hear
of a fix for this.
Thanks again,
Gilles
On 2018-12-03 10:52, Andreas Nowack wrote:
I would exclude the kernel as source of the problem since downgrade
to Xorg 1.19 removes all the error messages and problems. (But due to
security bugs, Xorg 1.19 is not a real option).
Best regards,
Andreas
--
Pat Riehecky
Fermi National Accelerator Laboratory
www.fnal.gov
www.scientificlinux.org
