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[Launchpad Bug Tracker <1377373@xxxxxxxxxxxxxxxxxx>]

** Branch linked: lp:ubuntu/lightdm

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https://bugs.launchpad.net/bugs/1377373

Title:
  Variables defined twice in config files lead to crash

Status in Light Display Manager:
  Fix Released
Status in Light Display Manager 1.10 series:
  Fix Released
Status in Light Display Manager 1.12 series:
  Fix Released
Status in “lightdm” package in Ubuntu:
  Fix Released
Status in “lightdm” source package in Trusty:
  Fix Committed
Status in “lightdm” source package in Utopic:
  Fix Released
Status in “lightdm” package in Debian:
  Fix Released

Bug description:
  [Impact]
  Having the same configuration variable defined in two places causes LightDM to a double free and potentially crash.

  [Test Case]
  1. Install two configuration files in /etc/lightdm/lightdm.conf.d which both define the same variable.
  2. Run LightDM
  Expected result:
  LightDM runs correctly.
  Observed result:
  LightDM double frees a variable (seen with valgrind) and can crash.

  [Regression Potential]
  Low. The fix is not to double free the variable.

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