You have been subscribed to a public bug: 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 ** Affects: linux-meta (Ubuntu) Importance: Undecided Status: New ** Tags: overlayfs -- Overlayfs breaks /proc/self/exe link https://bugs.launchpad.net/bugs/1347746 You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-meta in Ubuntu. -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp