Why GDM crashes while unclocking the active screensaver ?

Solution Verified - Updated -

Issue

  • GDM crash when user tries to unlock the locked screen over VNC
  • GDM crash when user tries to unlock the locked screen from physical console
  • GDM crashes after a sequence of user switch and user log off
  • GDM crashes with following message
*** Error in `/usr/sbin/gdm': double free or corruption (xxxx): 0x0000555555800030 ***

Environment

  • Red Hat Enterprise Linux 7.4
  • gdm-3.22.3-12.el7

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