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[Bryce Harrington <1660725@xxxxxxxxxxxxxxxxxx>]

>From the error tracker, this crash was seen in apache versions between
2.4.6 (Ubuntu 13.10) and 2.4.27 (Ubuntu 17.10) but there have been no
instances of the issue on Ubuntu 18.04 or newer.  It appears to still
exhibit itself in the version published for Ubuntu 16.04, apache2
2.4.18-2ubuntu3.14.  There is a .15 in proposed for xenial but it
doesn't sound like a fix for this crash.  So the issue is still relevant
for xenial at least.  Indeed, the last occurrence reported was Jan 23,
2020.

The fault occurs in php7.0 code, during the php module shutdown
codepath, where a destructor freeing a hash tries to unmap an invalid
pointer.  Since this occurs during cleanup, it may not have shown
noteworthy symptoms, which may be why it stayed around for so long.

** Changed in: apache2 (Ubuntu)
   Importance: Undecided => Medium

** Changed in: apache2 (Ubuntu)
       Status: New => Triaged

** Also affects: apache2 (Ubuntu Groovy)
   Importance: Medium
       Status: Triaged

** Also affects: apache2 (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Changed in: apache2 (Ubuntu Groovy)
       Status: Triaged => Fix Released

** Changed in: apache2 (Ubuntu Xenial)
       Status: New => Triaged

** Changed in: apache2 (Ubuntu Xenial)
   Importance: Undecided => Medium

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https://bugs.launchpad.net/bugs/1660725

Title:
  /usr/sbin/apache2:*** Error in `/usr/sbin/apache2': munmap_chunk():
  invalid pointer: ADDR ***

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