On Thu, Jan 18, 2018 at 11:48:35AM -0600, Kevin Stange wrote: > Hi, > Hi, > I am very sorry to do this on short notice, but obviously Meltdown and > Spectre are a lot more than anyone was really expecting to come down the > pipeline. Xen 4.4 has been EOL upstream for about a year now and I have > personally been reviewing and backporting patches based on the 4.5 > versions made available upstream. > > Given that 4.5 is now also reaching EOL, backporting to 4.4 will become > harder and I've already taken steps to vacate 4.4 in my own environment > ASAP. Spectre and Meltdown patches most likely will only officially > reach 4.6 and are very complicated. Ultimately, I don't think this is a > constructive use of my time. Therefore, I will NOT be continuing to > provide updated Xen 4.4 builds any longer through CentOS Virt SIG. If > someone else would like to take on the job, you're welcome to try. Pop > by #centos-virt on Freenode to talk to us there if you're interested. > > For short term mitigation of the Meltdown issue on 4.4 with PV domains, > your best bet is probably to use the "Vixen" shim solution, which George > has put into the xen-44 package repository per his email from two days > ago. Vixen allows you to run PV domains inside HVM guest containers. It > does not protect the guest from itself, but protects the domains from > each other. Long term, your best bet is to try to get up to a new > version of Xen that is under upstream security support, probably 4.8. > Oracle VM 3.4 product is based on Xen 4.4, and they seem to have backported the fixes already.. It looks like those src.rpms have {CVE-2017-5753} {CVE-2017-5715} {CVE-2017-5754} fixes included. https://oss.oracle.com/pipermail/oraclevm-errata/2018-January/thread.html https://oss.oracle.com/pipermail/oraclevm-errata/2018-January/000816.html https://oss.oracle.com/pipermail/oraclevm-errata/2018-January/000817.html http://oss.oracle.com/oraclevm/server/3.4/SRPMS-updates/xen-4.4.4-155.0.12.el6.src.rpm http://oss.oracle.com/oraclevm/server/3.4/SRPMS-updates/xen-4.4.4-105.0.30.el6.src.rpm -- Pasi > -- > Kevin Stange > Chief Technology Officer > Steadfast | Managed Infrastructure, Datacenter and Cloud Services > 800 S Wells, Suite 190 | Chicago, IL 60607 > 312.602.2689 X203 | Fax: 312.602.2688 > kevin@xxxxxxxxxxxxx | www.steadfast.net _______________________________________________ CentOS-virt mailing list CentOS-virt@xxxxxxxxxx https://lists.centos.org/mailman/listinfo/centos-virt