[Beowulf] RHEL7 kernel update for L1TF vulnerability breaks RDMA

[Joe Landman]

FWIW: it looks like this is the CVE that keeps on giving. Yesterday some 
of the mitigation hit, and this morning a new rev of kernel with a 
single CVE patch came out.   Don't know when it might show up in distro 
kernels, but its already in mine.

We are not done with Spectre/Meltdown vulns by any stretch (no insider 
info, just a hypothesis).


On 08/18/2018 03:19 PM, Jeff Johnson wrote:
> With the spate of security flaws over the past year and the impacts 
> their fixes have on performance and functionality it might be 
> worthwhile to just run airgapped.
>
>
> On Thu, Aug 16, 2018 at 22:48 Chris Samuel <chris at csamuel.org 
> <mailto:chris at csamuel.org>> wrote:
>
>     Hi all,
>
>     Just a heads up that the 3.10.0-862.11.6.el7.x86_64 kernel from
>     RHEL/CentOS
>     that was released to address the most recent Intel CPU problem
>     "L1TF" seems to
>     break RDMA (found by a colleague here at Swinburne).   The
>     discovery came
>     about when testing the new kernel on a system running Lustre.
>
>     https://jira.whamcloud.com/browse/LU-11257
>
>     Stanford have reported it to Red Hat, but the BZ entry is locked
>     due to its
>     relationship with L1TF.
>
>     https://bugzilla.redhat.com/show_bug.cgi?id=1618452
>
>     Hope this helps folks out there..
>
>     All the best,
>     Chris
>     -- 
>      Chris Samuel  : http://www.csamuel.org/ :  Melbourne, VIC
>
>
>
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> -- 
> ------------------------------
> Jeff Johnson
> Co-Founder
> Aeon Computing
>
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Joe Landman
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