System enters emergency mode upon boot or systemd-udev-settle service fails and "systemd-udevd[XX]: worker [XX] terminated by signal 9 (Killed)" messages are being logged

Issue

• System fails to boot and enters emergency mode due to some device timing out

• Messages related to systemd-udev can be seen in the journal

  # journalctl -b | egrep "systemd-udevd.*terminated by signal"
  [...] systemd-udevd[XX]: worker [2816] terminated by signal 9 (Killed)
  

• Optionally, systemd-udev-settle.service unit fails

  [...] systemd[1]: Failed to start udev Wait for Complete Device Initialization.
  [...] systemd[1]: Unit systemd-udev-settle.service entered failed state.
  [...] systemd[1]: systemd-udev-settle.service failed.