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[joseph spitz <josephgrey@xxxxxxxxx>]

I am also getting this error, and like Eugene says, it seems to be
dependent on the environment in which the mount command is executed.

I attempted to mount from inside a tmux session, and the mount failed.
I detached from the tmux session, issued the very same mount command in
a plain ssh terminal, and the mount succeeded.

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https://bugs.launchpad.net/bugs/1377924

Title:
  ecryptfs fails to mount (Unable to link the KEY_SPEC_USER_KEYRING into
  the KEY_SPEC_SESSION_KEYRING)

Status in “apparmor” package in Ubuntu:
  Confirmed
Status in “linux” package in Ubuntu:
  Opinion
Status in “openssh” package in Ubuntu:
  Confirmed

Bug description:
  This is a reincarnation of Bug #1234412.

  Looks like issue is not related to specific kernel versions.

  Currently I am observing two Trusty (14.04) machines, with very close configuration, running same kernel:
  3.13.0-36-generic #63-Ubuntu SMP Wed Sep 3 21:30:07 UTC 2014 x86_64.

  One is able to mount without the problem but the other is refusing:
  $ mount -t ecryptfs sec sec
  Unable to link the KEY_SPEC_USER_KEYRING into the KEY_SPEC_SESSION_KEYRING; there is something wrong with your kernel keyring. Did you build key retention support into your kernel?

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