[Bug 1486073] [NEW] 'Failed to whiteout' error in 14.04 with 3.19 kernel and LXC 1.0.7

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When cloning an unprivileged container with the "-s -B overlayfs" flags,
then starting this container and running a command like ``apt-get
update`` in the new container, a kernel error "Failed to whiteout" is
produced.

- Kernel error: http://pastebin.com/iajXHbHZ
- Kernel version: 3.19.0-25-generic #26~14.04.1-Ubuntu SMP Fri Jul 24 21:16:20 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
- LXC version: 1.0.7

- Commands to reproduce:

lxc-clone -s -B overlayfs base test
lxc-start -n test -d
lxc-attach -n test
apt-get update


When executing the above commands, your terminal will hang, and you won't be able to destroy/stop the container anymore. The kernel log then also has the error linked above.

** Affects: lxc (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: overlayfs
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'Failed to whiteout' error in 14.04 with 3.19 kernel and LXC 1.0.7
https://bugs.launchpad.net/bugs/1486073
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