Fw: [Bug 204099] New: systemd-networkd fails on 5.2 - same version works on 5.1.16

Fw: [Bug 204099] New: systemd-networkd fails on 5.2 - same version works on 5.1.16

[Stephen Hemminger]

Looks like the stricter netlink validation broke userspace.
This is bad.

Begin forwarded message:

Date: Tue, 09 Jul 2019 00:44:01 +0000
From: bugzilla-daemon@bugzilla.kernel.org
To: stephen@networkplumber.org
Subject: [Bug 204099] New: systemd-networkd fails on 5.2 - same version works on 5.1.16


https://bugzilla.kernel.org/show_bug.cgi?id=204099

            Bug ID: 204099
           Summary: systemd-networkd fails on 5.2 - same version works on
                    5.1.16
           Product: Networking
           Version: 2.5
    Kernel Version: 5.2
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: low
          Priority: P1
         Component: Other
          Assignee: stephen@networkplumber.org
          Reporter: Ian.kumlien@gmail.com
        Regression: No

This is more FYI, I haven't had time to properly debug it.

Booting 5.2 causes systemd-networkd to fail to bring any interface up, it will
fail with: "Could not bring up interface: Invalid argument"

However, booting 5.1.16 with the same software works just fine.

Sounds like something was changed in, what I assume is, the netlink API

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Re: Fw: [Bug 204099] New: systemd-networkd fails on 5.2 - same version works on 5.1.16

[David Ahern]

On 7/9/19 8:43 AM, Stephen Hemminger wrote:
> Looks like the stricter netlink validation broke userspace.
> This is bad.

I believe other reports have traced this to

commit 7dc2bccab0ee37ac28096b8fcdc390a679a15841
Author: Maxim Mikityanskiy <maximmi@mellanox.com>
Date:   Tue May 21 06:40:04 2019 +0000

    Validate required parameters in inet6_validate_link_af

Re: Fw: [Bug 204099] New: systemd-networkd fails on 5.2 - same version works on 5.1.16

[Leon Romanovsky]

On Wed, Jul 10, 2019 at 04:43:18PM -0600, David Ahern wrote:
> On 7/9/19 8:43 AM, Stephen Hemminger wrote:
> > Looks like the stricter netlink validation broke userspace.
> > This is bad.

Actually, the initial bug in systemd and it is where it should be fixed.

>
> I believe other reports have traced this to
>
> commit 7dc2bccab0ee37ac28096b8fcdc390a679a15841
> Author: Maxim Mikityanskiy <maximmi@mellanox.com>
> Date:   Tue May 21 06:40:04 2019 +0000
>
>     Validate required parameters in inet6_validate_link_af