where do I file a bug with xenial 4.4.0-66-generic issue on a kvm hypervisor ?

[Eliezer Croitoru]

Just an update else then the bug.
I found the reason the for the issue.
I installed Docker from the main Docker repo as opposed to docker.io package
from Ubuntu.
It resulted in a scenario which something goes wrong and the kernel start's
doing something weird.
I do not know the exact in-depth details of the issue but I believe that
this is the root cause since the same issue appeared on a fresh CentOS kvm
hypervisor after adding the official Docker package.

All The Bests,
Eliezer

----
Eliezer Croitoru
Linux System Administrator
Mobile: +972-5-28704261
Email: eliezer at ngtech.co.il



-----Original Message-----
From: Robie Basak [mailto:robie.basak at ubuntu.com] 
Sent: Monday, March 13, 2017 12:03 PM
To: Eliezer Croitoru <eliezer at ngtech.co.il>
Cc: ubuntu-server at lists.ubuntu.com
Subject: Re: where do I file a bug with xenial 4.4.0-66-generic issue on a
kvm hypervisor ?

Hi Eliezer,

On Mon, Mar 13, 2017 at 11:52:14AM +0200, Eliezer Croitoru wrote:
> And worked fine for quite some time.
> The latest Xenial kernel from the upgrade (4.4.0-66-generic) causes a very
> specific issue.
> VM's with virtio nic cannot contact the network.(e1000 works fine)
> I have not delved to see if tcpdump sees the packets or something similar
in
> the hypervisor level and bumped the kernel to 4.6 which I have tested long
> ago to work fine.
> 
> Where do I file the bug report?
> I am pretty sure it's a very series bug but not sure who should be aware
of
> it and how to debug if it's a machine local one or a wider issue.

Thank you for this report.

You should be able to verify that the bug is in the kernel by switching
only the version of the kernel to see if you can introduce and fix the
bug as you switch kernels. If this turns out to be correct, please file
a bug against the "linux" package (you can use
https://bugs.launchpad.net/ubuntu/+source/linux/+filebug) and tag it
"regression-update".

Thanks!