Keyring fail - login broken - lost user data

[markling]

I am unable to login to my system after keyring crash. Can login as root. But unable to mount user partition as root. User data lost.

Background:

Changed passwds yesterday: added new and removed old password for full-disk encrypted volume (LVM).
Also ran software updates.

Today:

Boot up: SUCCESS
Enter password for encrypted disk: SUCCESS
Enter user password at Xubuntu login: FAIL

Error:

User login would simply not accept user password. The screen would refresh and present a blank user passwd login again.
The system gave no message.

Workaround:

Logged in as root. Attempt to resolve problem: FAIL.

Error Report:

Apport reported Keyring malfunction on root startup (N.B. Apport report attached)

Workaround steps:

Changed passwd on primary user account (user1) using command line: SUCCESS
Login as user1 in GUI with new passwd: FAIL
Change password in Users app in GIU (via settings): FAIL
- the user settings dialogue would simply hang on opening, with its progress wheel turning. Refused to close. Forced to kill.
Login as user1 from root command line: FAIL
- Error message: "Signature not found in user keyring, perhaps try interactive 'ecrypts-mount-private'.

Run ecryptfs-mount-private to access user1 data: FAIL
- Error: "Encrypted directory is not setup properly"

Remove passwd from user1 account: SUCCESS
Login to user1 from GUI: FAIL
- same symptoms as before - on entering password, screen refresh and blank password form represented.
Create new user account and login to it: SUCCESS

Load lost user data directory using GUI prompt: FAIL
- user1 home directory has README:

"""
THIS DIRECTORY HAS BEEN UNMOUNTED TO PROTECT YOUR DATA.

From the graphical desktop, click on:
 "Access Your Private Data"

or

From the command line, run:
 ecryptfs-mount-private
"""

Already tried and failed ecryptfs-mount-private, so clicked on "Access Your Private Data": FAIL
- a terminal windows flashes up for the tiniest fraction of a second and nothing more happens.

Notable Symptom:

Logged in as root to file this report. But on attempting connection through network router, my system asked me to create a new keyring password. I did already have a keyring password. This suggests the keyring password was wiped. Perhaps it was lost when the user password was changed?

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: gnome-keyring 3.10.1-1ubuntu4
ProcVersionSignature: Ubuntu 3.13.0-35.62-generic 3.13.11.6
Uname: Linux 3.13.0-35-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.4
Architecture: amd64
CurrentDesktop: XFCE
Date: Sun Sep 21 19:05:14 2014
SourcePackage: gnome-keyring
UpgradeStatus: No upgrade log present (probably fresh install)

[markling (markling)]

Attached relevant part of syslog and lightm.log.

[markling (markling)]

Recent dpkg log (one other thing coincided with the crash aside from passwords being changed and that was a bunch of updates).

The software updates were run after the password change. And prior to shutdown. On restart, keyring failed.

[markling (markling)]

I've made copies of the other logs. I can post any that may be required.

[markling (markling)]

Pointless.

[markling (markling)]

You should put that as a disclaimer to anyone taking time to report a bug: "What you are about to do is utterly pointless".

[Marc Deslauriers (mdeslaur)]

Thanks for taking the time to report this bug and helping to make Ubuntu better. We appreciate the difficulties you are facing, but this appears to be a "regular" (non-security) bug. I have unmarked it as a security issue since this bug does not show evidence of allowing attackers to cross privilege boundaries nor directly cause loss of data/privacy. Please feel free to report any other bugs you may find.