[Bug 1929560] Re: link mac isn't set if already up

[Launchpad Bug Tracker]

This bug was fixed in the package systemd - 237-3ubuntu10.48

---------------
systemd (237-3ubuntu10.48) bionic; urgency=medium

  * d/p/lp1925216-seccomp-rework-functions-for-parsing-system-call-fil.patch:
    Downgrade syscall group parsing failure logs to debug (LP: #1925216)
    https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=8c0181e24f7c0128a48c706d1f4b28ec0f225fd7
  * d/p/lp1929560-network-move-set-MAC-and-set-nomaster-operations-out.patch:
    Move link mac and master config out of link_up() (LP: #1929560)
    https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=d808ea22366ca7ba4b5bb32815ab0ca2eea8a49f
  * d/p/resolved-Mitigate-DVE-2018-0001-by-retrying-NXDOMAIN-with.patch,
    d/p/resolved_disable-connection-downgrade-when-DNSSEC-yes.patch,
    d/p/lp1880258-log-nxdomain-as-debug.patch,
    d/p/lp1785383-resolved-address-DVE-2018-0001.patch:
    - Use upstream patch for DVE-2018-0001 handling (LP: #1785383)
    https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=b6258fda64c84c34b0f8026e6e29bcfffa8dc4f1

 -- Dan Streetman <ddstreet at canonical.com>  Thu, 27 May 2021 11:18:38
-0400

** Changed in: systemd (Ubuntu Bionic)
       Status: Fix Committed => Fix Released

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to systemd in Ubuntu.
https://bugs.launchpad.net/bugs/1929560

Title:
  link mac isn't set if already up

Status in systemd:
  Fix Released
Status in systemd package in Ubuntu:
  Fix Released
Status in systemd source package in Bionic:
  Fix Released
Status in systemd source package in Focal:
  Fix Released
Status in systemd source package in Groovy:
  Fix Released

Bug description:
  [impact]

  if link is already up, configured mac isn't set

  this also affects the master/nomaster configuration

  [test case]

  create .network config for the link, for example:

  [Match]
  Name=eth0

  [Link]
  MACAddress=00:16:3e:ff:ff:ff

  [Network]
  DHCP=yes

  
  make sure the link is already up, and restart systemd-networkd:

  root at test-f:/etc/systemd/network# ip l show eth0
  61: eth0 at if62: <BROADCAST,MULTICAST> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default qlen 1000
      link/ether 00:16:3e:fc:b2:00 brd ff:ff:ff:ff:ff:ff link-netnsid 0
  root at test-f:/etc/systemd/network# ip l set dev eth0 up
  root at test-f:/etc/systemd/network# ip l show eth0
  61: eth0 at if62: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000
      link/ether 00:16:3e:fc:b2:00 brd ff:ff:ff:ff:ff:ff link-netnsid 0
  root at test-f:/etc/systemd/network# systemctl restart systemd-networkd
  root at test-f:/etc/systemd/network# ip l show eth0
  61: eth0 at if62: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000
      link/ether 00:16:3e:fc:b2:00 brd ff:ff:ff:ff:ff:ff link-netnsid 0
  root at test-f:/etc/systemd/network# ip l set dev eth0 down
  root at test-f:/etc/systemd/network# ip l show eth0
  61: eth0 at if62: <BROADCAST,MULTICAST> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default qlen 1000
      link/ether 00:16:3e:fc:b2:00 brd ff:ff:ff:ff:ff:ff link-netnsid 0
  root at test-f:/etc/systemd/network# systemctl restart systemd-networkd
  root at test-f:/etc/systemd/network# ip l show eth0
  61: eth0 at if62: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000
      link/ether 00:16:3e:ff:ff:ff brd ff:ff:ff:ff:ff:ff link-netnsid 0

  [regression potential]

  any regression would likely result in incorrectly set link mac and/or
  master, or failure to correctly set mac and/or master

  [scope]

  this is needed for g and earlier

  this is fixed upstream by commit
  e16e4b3bedc57919b3ecb4096e941709a5d39b8a which is included in v247 so
  this is fixed already in h and later

  [other info]

  this moves the configuration of the link mac and master out of the
  link_up() function, so this also allows repeated calls to link_up()
  without reconfiguring the link mac and master. That behavior is useful
  for the commits for bug 1664844

To manage notifications about this bug go to:
https://bugs.launchpad.net/systemd/+bug/1929560/+subscriptions