[Bug 1912331] Re: Many interfaces lead to "kernel receive buffer overrun"

[Dan Streetman]

> Can this be backported to Focal?

If I'm understanding the upstream bug correctly, this only affects those
using a really large number of interfaces and/or vlans and/or bridges on
a single system, and in that situation this can be worked around just by
increasing the socket receive buffer size for systemd-networkd.socket,
right?

If that's the case, I don't really think this is something valid for
backporting; the buffer increase is just delaying the ENOBUF, and if
more interfaces are added it may still happen. I believe the buffer size
adjustment is a configuration issue for anyone using such a large number
of interfaces.

However, if I've misunderstood the bug or patch, or if there are
problems with my evaluation of it, please provide specific steps and/or
config to reproduce the problem, so we can evaluate what's needed for
backporting to focal.

For now, marking as wontfix.

** Changed in: systemd (Ubuntu Focal)
       Status: New => Won't Fix

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https://bugs.launchpad.net/bugs/1912331

Title:
  Many interfaces lead to "kernel receive buffer overrun"

Status in systemd:
  Fix Released
Status in systemd package in Ubuntu:
  Fix Released
Status in systemd source package in Focal:
  Won't Fix
Status in systemd source package in Groovy:
  Fix Released

Bug description:
  This is about a systemd-networkd bug, described here:

  https://github.com/systemd/systemd/issues/14417

  There's a patch available:

  https://github.com/systemd/systemd/pull/16982

  Can this be backported to Focal?

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