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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

This bug is missing log files that will aid in diagnosing the problem.
>From a terminal window please run:

apport-collect 1347746

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1347746

Title:
  Overlayfs breaks /proc/self/exe link

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Overlayfs breaks /proc/self/exe link when mounted not to VFS root.
  This issue, for example, breaks clang which uses /proc/self/exe to recursively exec self.

  Test case:
  $ mkdir /tmp/bug/ && cd /tmp/bug
  $ mkdir lower upper mount
  $ cp `which readlink` upper
  $ sudo mount -t overlayfs -o lowerdir=lower,upperdir=upper none mount
  $ ./upper/readlink /proc/self/exe
  /tmp/bug/upper/readlink
  $ ./mount/readlink /proc/self/exe
  /readlink

  At the same time aufs don't break /proc/self/exe:
  $ sudo umount mount/
  $ sudo mount -t aufs -o noxino,br=upper:lower none mount/
  $ ./mount/readlink /proc/self/exe
  /tmp/bug/mount/readlink

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