[Beowulf] RHEL7 kernel update for L1TF vulnerability breaks RDMA

[Jörg Saßmannshausen]

Hi all,

I came across the 'foreshadow' problem 2 days ago. 

This is what I got back from my colleagues:

https://access.redhat.com/security/vulnerabilities/L1TF-perf

This is more a performance investigation though but I thought I might add a 
bit more information to the whole problem.

All the best

Jörg

Am Freitag, 17. August 2018, 07:54:03 BST schrieb Kilian Cavalotti:
> Hi Chris,
> 
> On Thu, Aug 16, 2018 at 10:05 PM, Chris Samuel <chris at csamuel.org> wrote:
> > There's 6 CVE's addressed in that update from the look of it, so it might
> > not be the L1TF fix itself that has triggered it.
> > 
> > https://access.redhat.com/errata/RHSA-2018:2384
> 
> That's true: RH mentioned an "embargo'd security fix" but didn't refer
> to L1TF explicitly (which I think is not under embargo anymore).
> 
> As the reporter of the issue on the Whamcloud JIRA, I also have to
> apologize for initially pointing fingers at Lustre, it didn't cross my
> mind that this kind of whole RDMA stack breakage would have slipped
> past Red Hat's QA.
> 
> Cheers,