TPM errors are due to crbug.com/867724.

I don't *think* it should impact kiosk mode functionality, but +poromov to look at the code to see why those NOTREACHED() are being hit.

Actually, this is a dupe of 867724 - we are preparing comms to our customers around how to address this.

Short version is there was a bug that put the TPM into lockdown mode, making kiosk data inaccessible. This bug has been fixed, but devices that are in lockdown may need some action (like leaving them idle for 24 hours) to restore them to normal function. 

Apologies for this problem - understood that it's fairly catastrophic and we're urgently working to get clear guidance out to admins and users. Please follow along on the main bug (crbug.com/867724).

Thank you for the prompt response, apologies for the duplicate report, we didn't see crbug.com/867724 since it's a private issue.

atwilson@ Since we don't have visibility on that issue, is there a version number/timeframe we can look for where the issue started occurring?

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/420e9a8276edbfa1b0a3434b26c589b4b4665a80

commit 420e9a8276edbfa1b0a3434b26c589b4b4665a80
Author: Sergey Poromov <poromov@chromium.org>
Date: Thu Sep 20 16:37:31 2018

Fix using |delayed_login_failure_| after free.

AuthFailure was remembered in OnAuthFailure() by a pointer and was
freed after that leading to strange failure reason on next read.
It was introduced 5 years ago in https://crrev.com/22900017

[719:719:0918/112724.240220:ERROR:auth_status_consumer.h(95)] NOTREACHED() hit.  [Reason: info:NOTREACHED()]
[719:719:0918/112724.240293:ERROR:device_event_log_impl.cc(159)] [11:27:24.240] Login: cryptohome_authenticator.cc:725 Login failed:
[719:719:0918/112724.240371:ERROR:login_performer.cc(63)] Login failure, reason=0, error.state=0
[719:719:0918/112724.240414:ERROR:kiosk_profile_loader.cc(202)] NOTREACHED() hit.  [Reason: info:NOTREACHED()]
[719:719:0918/112724.240458:ERROR:auth_status_consumer.h(95)] NOTREACHED() hit.  [Reason: info:NOTREACHED()]
[719:719:0918/112724.240445:ERROR:kiosk_profile_loader.cc(188)] Kiosk auth failure: error=
[719:719:0918/112724.240674:ERROR:kiosk_profile_loader.cc(50)] NOTREACHED() hit.  [Reason: info:NOTREACHED()]
[719:719:0918/112724.240732:ERROR:app_launch_controller.cc(526)] Kiosk launch failed, error=4

Bug:  885346 
Change-Id: I46ca3b3630aa42e25a25d9cfecb3a16e3c361b9f
Reviewed-on: https://chromium-review.googlesource.com/1236265
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Commit-Queue: Sergey Poromov <poromov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#592830}
[modify] https://crrev.com/420e9a8276edbfa1b0a3434b26c589b4b4665a80/chromeos/login/auth/cryptohome_authenticator.cc
[modify] https://crrev.com/420e9a8276edbfa1b0a3434b26c589b4b4665a80/chromeos/login/auth/cryptohome_authenticator.h