The bug was observed running the Vulkan CTS on an Nvidia Jetson AGX Xavier 
Developer Kit and on a Jetson AGX Orin Developer Kit. Running the testcase 
dEQP-VK.api.object_management.alloc_callback_fail.instance without an X display 
should cause the double free to occur.
I confirmed that this is a GLVND issue, as when I built libglvnd with small fix 
that was merged and used it instead of the provided libs, the issue went away.

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https://bugs.launchpad.net/bugs/1966334

Title:
  GLVND: Set current thread state to NULL in teardown

Status in libglvnd package in Ubuntu:
  Confirmed

Bug description:
  A new fix has been merged into the libglvnd repo at
  https://gitlab.freedesktop.org/glvnd/libglvnd

  This change fixes an issue where if eglReleaseThread gets externally called 
after the EGL destructor, a  double free occurs due to the threadState that 
eglReleaseThread checks is not null being not null despite being freed by the 
destuctor.
  The change makes the threadState null in the destructor to fix this.

  Can this make it into the libs in 20.04 LTS?

  Source package where the issue is encountered:
  https://launchpad.net/ubuntu/+source/libglvnd/1.3.2-1~ubuntu0.20.04.2

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