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[Tyler Hicks <tyhicks@xxxxxxxxxxxxx>]

This issue is not specific to eCryptfs. It is specific to a user's home
directory being a mount point. For example, I can reproduce this issue
with ext4:

foo@sec-vivid-amd64:~$ grep home\/foo /proc/mounts
/dev/loop0 /home/foo ext4 rw,relatime,data=ordered 0 0
foo@sec-vivid-amd64:~$ schroot -c click-amd64 -- true
E: 10mount: umount: /var/lib/schroot/mount/click-amd64-63d79a95-7c79-4f59-97ea-c9089e9c0c9f/home/foo: target is busy
E: 10mount:         (In some cases useful info about processes that
E: click-amd64-63d79a95-7c79-4f59-97ea-c9089e9c0c9f: Chroot setup failed: stage=setup-stop
foo@sec-vivid-amd64:~$ grep home\/foo /proc/mounts
/dev/loop0 /home/foo ext4 rw,relatime,data=ordered 0 0
/dev/loop0 /var/lib/schroot/mount/click-amd64-63d79a95-7c79-4f59-97ea-c9089e9c0c9f/home/foo ext4 rw,relatime,data=ordered 0 0

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https://bugs.launchpad.net/bugs/1427264

Title:
  using ecryptfs, creating frameworks fail to bind mount issues

Status in click package in Ubuntu:
  New

Bug description:
  Using vivid creating framework fails for ecryptfs users, the issue is
  similar to bug #769595

  The userdir is mounted in a way which makes unmounts fail

  "E: 10mount: umount: /var/lib/schroot/mount/click-ubuntu-sdk-14.10
  -armhf-ec6aaf62-31e0-47e9-b2f8-73f0b038fb4d/home/user: target is busy
  E: 10mount: (In some cases useful info about processes that E:
  10mount: use the device is found by lsof(8) or fuser(1).) "

  changing the fstab line to be "/home/user /home/user      none
  rw,bind        0       0" workarounds the issue

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