[Bug 1618471] Re: udev: init script unconditionally writes to /sys/kernel/uevent_helper

[Kai Kasurinen]

Fixed in version systemd/208-8

** Package changed: udev (Debian) => systemd (Debian)

** Package changed: udev (Ubuntu) => systemd (Ubuntu)

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

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https://bugs.launchpad.net/bugs/1618471

Title:
  udev: init script unconditionally writes to /sys/kernel/uevent_helper

Status in systemd package in Ubuntu:
  Fix Released
Status in systemd package in Debian:
  Fix Released

Bug description:
  The udev initramfs-tools script from trusty lts:

  /usr/share/initramfs-tools/scripts/init-top/udev

  does not check if uevent_helper does exist and fails to boot if it is
  missing - which it is in recent kernels (e.g. 4.7.2 from the mainline
  ppa or modern self build kernels where it is disabled per default
  afaik).

  See e.g.: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=756312

  Its fixed in xenials version (latest LTS) but fails in current supported LTS trusty to boot.
  Please backport those simple fix:

  if [ -w /sys/kernel/uevent_helper ]; then
  	echo > /sys/kernel/uevent_helper
  fi

  and maybe add

  udevadm settle || true

  at the end to support kernels without uevent_helper enabled.

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