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
