Hello Dan, or anyone else affected,

Accepted systemd into xenial-proposed. The package will build now and be
available at
https://launchpad.net/ubuntu/+source/systemd/229-4ubuntu21.29 in a few
hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.  Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, what testing has been
performed on the package and change the tag from verification-needed-
xenial to verification-done-xenial. If it does not fix the bug for you,
please add a comment stating that, and change the tag to verification-
failed-xenial. In either case, without details of your testing we will
not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance for helping!

N.B. The updated package will be released to -updates after the bug(s)
fixed by this package have been verified and the package has been in
-proposed for a minimum of 7 days.

** Changed in: systemd (Ubuntu Xenial)
       Status: In Progress => Fix Committed

** Tags added: verification-needed verification-needed-xenial

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You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to systemd in Ubuntu.
https://bugs.launchpad.net/bugs/1877176

Title:
  64-char hostname causes dhcp server to reject lease

Status in systemd package in Ubuntu:
  Fix Released
Status in systemd source package in Xenial:
  Fix Committed

Bug description:
  [impact]

  a systemd with a 64-character hostname (the maximum hostname length
  for Linux) will cause a dhcp server to reject its dhcp lease due to
  passing the invalid hostname in the dhcp lease request.

  [test case]

  $ cat /etc/systemd/network/10-ens3.network
  [Match]
  Name=ens3

  [Network]
  DHCP=yes

  set hostname to 64-char name, e.g.:

  $ sudo hostnamectl set-hostname
  a123456789b123456789c123456789d123456789e123456789f123456789g123

  restart networkd:

  $ sudo systemctl restart systemd-networkd

  check logs:

  root@a123456789b123456789c123456789d123456789e123456789f123456789g123:~# 
journalctl -b -u systemd-networkd --no-pager | grep 'DHCP error'
  May 06 19:01:30 
a123456789b123456789c123456789d123456789e123456789f123456789g123 
systemd-networkd[737]: ens3: DHCP error: Client failed: Invalid argument

  [regression potential]

  Any regression would likely result in failure configuring/processing
  dhcpv4 server response, or rejection from the dhcpv4 server.

  [scope]

  this is fixed by commit 9740eae694e93b06658ff3b3045b22b591561e7c which
  is included in Bionic and later.  This is needed only for Xenial.

  [other info]

  this is a follow on to bug 1862232, which corrected sd-dhcp-client.c
  to continue networkd dhcp even if the hostname is invalid, however the
  older code in Xenial doesn't correctly detect the invalid hostname, so
  this additional patch is needed.

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