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

[iblue]

ecryptfs seems to be currently broken on Trusty.
System: Trusty
Linux: 3.13.0-8-generic #28-Ubuntu
ecryptfs: 103-0ubuntu2 or 104-0ubuntu1

Any attempt to mount fails with:
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?

Original reporter mentioned earlier kernel also:
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I am using the fedora 19 default kernel, which should have ecryptfs support. I don't think something is wrong with my kernel. Nevertheless I get this strange error message. Googling it lead to nothing, so I suspect this is a bug in ecryptfs?

 iblue@silence  ~/ecrypt-test  lsmod | grep ecrypt
ecryptfs 85466 0
encrypted_keys 18502 1 ecryptfs
 iblue@silence  ~/ecrypt-test  mkdir -m 700 private
 iblue@silence  ~/ecrypt-test  sudo mount -t ecryptfs private private
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?
 ✘ iblue@silence  ~/ecrypt-test  uname -a
Linux silence 3.10.11-200.fc19.x86_64 #1 SMP Mon Sep 9 13:03:01 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
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[Eugene San (eugenesan)]

After upgrade to Linux 3.13.0-11.31, the problem is gone.

I guess if no one will report the opposite, bug can be set as fixed.

[Eugene San (eugenesan)]

Refer to #1377924 if you still encounter the problem.