Bug#931636: doesnt bring up virtio interface link with kernel 5.2

[Ben Hutchings]

On Mon, 2019-07-08 at 17:52 +0200, Michael Biebl wrote:
> Am 08.07.19 um 16:41 schrieb Marc Haber:
> > Package: systemd
> > Version: 241-5
> > Severity: wishlist
> > File: systemd-networkd
> > 
> > Hi,
> > 
> > my buster (and sid) test systems don't bring up the virtio network
> > interface in systemd-networkd. systemd-networkd sends a command to a
> > netlink socket and gets back EINVAL.
> > 
> > A manually issued ip link set dev ens3 up finishes network init and the
> > interface becomse useable.
> > 
> > I will attach straces of a working and a non-working case once the bug
> > number is known. If you need additional information, I will help.
> > 
> > Going back to 5.1.16 also fixes the issue.
> 
> Could this be a kernel regression? Or a deliberate change?
> Ben, any ideas?

Whether or not there was a deliberate change, such regressions for
"real" programs are not allowed.  So I would suggest reporting this
upstream (netdev at vger.kernel.org).

(I did find a change to netlink validation functions:

commit 8cb081746c031fb164089322e2336a0bf5b3070c
Author: Johannes Berg <johannes.berg at intel.com>
Date:   Fri Apr 26 14:07:28 2019 +0200

    netlink: make validation more configurable for future strictness

but it looks like that is only meant to allow for stricter validation
of newly defined messages.)

Ben.

-- 
Ben Hutchings
The Peter principle: In a hierarchy, every employee tends to rise to
their level of incompetence.


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