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

From: Stephen Hemminger <[email-masked]>
Date: Tue, 9 Jul 2019 07:43:44 -0700

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

Begin forwarded message:

Date: Tue, 09 Jul 2019 00:44:01 +0000
From: [email-masked]
To: [email-masked]
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: [email-masked]
          Reporter: [email-masked]
        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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