[Bug 1077981] Re: udev rules from persistent usb-stick leak to installs

[Tim Booth]

I had this issue when using live-boot sticks for training purposes, and
as I was repacking the image anyway I made the following changes:

dpkg-divert --local --rename --divert /lib/udev/write_net_rules.real /lib/udev/write_net_rules
dpkg-divert --local --rename --divert /lib/udev/write_cd_rules.real /lib/udev/write_cd_rules

tee /lib/udev/write_net_rules /lib/udev/write_cd_rules <<X
#!/bin/sh

# Patch for Bio-Linux
# Only actually do this if not booted from Casper
if ! grep -q ' boot=casper\( \|$\)' /proc/cmdline ; then
    exec "$0".real "$@"
fi
X

chmod 755 /lib/udev/write_*_rules

It's crude but should be effective so long as this bug is open.

TIM

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https://bugs.launchpad.net/bugs/1077981

Title:
  udev rules from persistent usb-stick leak to installs

Status in “ubiquity” package in Ubuntu:
  Confirmed

Bug description:
  The problem happens with a live-USB stick created with the Startup
  Disk Creator with persistence turned on. As expected, every network
  interface of every machine the stick is booted on gets an entry in
  /etc/udev/rules.d/70-persistent-net.rules.

  The unexpected behavior here is, that the file ends up on
  installations made with the USB stick. On a vanilla install you end up
  with your interfaces named wlan8 and eth12. I experienced cases were
  no network connections were possible until the huge list of rules was
  deleted.

  I attached an anonymized example of 70-persistent-net.rules.

  This bug-report was created out of a vanilla install of Ubuntu in a
  virtualbox vm.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: ubiquity (not installed)
  ProcVersionSignature: Ubuntu 3.2.0-32.51-generic-pae 3.2.30
  Uname: Linux 3.2.0-32-generic-pae i686
  ApportVersion: 2.0.1-0ubuntu12
  Architecture: i386
  Date: Mon Nov 12 16:18:18 2012
  InstallCmdLine: noprompt cdrom-detect/try-usb=true persistent file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash -- debian-installer/language=de keyboard-configuration/layoutcode?=de
  InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release i386 (20120817.3)
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=de_DE.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubiquity
  UpgradeStatus: No upgrade log present (probably fresh install)

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