[DRE-maint] Bug#1018934: Login broken after rails upgrade: Psych::DisallowedClass, Tried to load unspecified class: Symbol

[Patrick Matthäi]

Package: gitlab
Version:
Severity: serious

Hello,

severity serious, because I do not know if the standard login is also 
broken or "just" if you use ldap (the standard login also failed). After 
upgrading these packages later we were unable to login at gitlab again. 
The error I get in the logs is:

"message":"(ldapmain) Authentication failure! ldap_error: 
Psych::DisallowedClass, Tried to load unspecified class: Symbol"}

2022-09-01 10:52:59 upgrade libprotobuf31:amd64 3.20.0-1~fto11+1 21.5-1~fto11+1
2022-09-01 10:52:59 upgrade libprotoc31:amd64 3.20.0-1~fto11+1 21.5-1~fto11+1
2022-09-01 10:53:00 upgrade ruby-rails:all 2:6.1.4.7+dfsg-2~fto11+1 2:6.1.6.1+dfsg-1~fto11+1
2022-09-01 10:53:00 upgrade ruby-actiontext:all 2:6.1.4.7+dfsg-2~fto11+1 2:6.1.6.1+dfsg-1~fto11+1
2022-09-01 10:53:00 upgrade ruby-railties:all 2:6.1.4.7+dfsg-2~fto11+1 2:6.1.6.1+dfsg-1~fto11+1
2022-09-01 10:53:00 upgrade ruby-actionmailbox:all 2:6.1.4.7+dfsg-2~fto11+1 2:6.1.6.1+dfsg-1~fto11+1
2022-09-01 10:53:01 upgrade ruby-activestorage:all 2:6.1.4.7+dfsg-2~fto11+1 2:6.1.6.1+dfsg-1~fto11+1
2022-09-01 10:53:01 upgrade ruby-actionmailer:all 2:6.1.4.7+dfsg-2~fto11+1 2:6.1.6.1+dfsg-1~fto11+1
2022-09-01 10:53:01 upgrade ruby-actioncable:all 2:6.1.4.7+dfsg-2~fto11+1 2:6.1.6.1+dfsg-1~fto11+1
2022-09-01 10:53:01 upgrade ruby-actionpack:all 2:6.1.4.7+dfsg-2~fto11+1 2:6.1.6.1+dfsg-1~fto11+1
2022-09-01 10:53:01 upgrade ruby-actionview:all 2:6.1.4.7+dfsg-2~fto11+1 2:6.1.6.1+dfsg-1~fto11+1
2022-09-01 10:53:02 upgrade ruby-activejob:all 2:6.1.4.7+dfsg-2~fto11+1 2:6.1.6.1+dfsg-1~fto11+1
2022-09-01 10:53:02 upgrade ruby-activerecord:all 2:6.1.4.7+dfsg-2~fto11+1 2:6.1.6.1+dfsg-1~fto11+1
2022-09-01 10:53:02 upgrade ruby-activemodel:all 2:6.1.4.7+dfsg-2~fto11+1 2:6.1.6.1+dfsg-1~fto11+1
2022-09-01 10:53:02 upgrade ruby-activesupport:all 2:6.1.4.7+dfsg-2~fto11+1 2:6.1.6.1+dfsg-1~fto11+1
2022-09-01 10:53:03 upgrade ruby-google-protobuf:amd64 3.20.0-1~fto11+1 21.5-1~fto11+1
2022-09-01 10:53:03 upgrade ruby-oj:amd64 3.13.19-1~fto11+1 3.13.21-1~fto11+1
2022-09-01 10:53:03 upgrade ruby-view-component:all 2.53.0-2~fto11+1 2.69.0-1~fto11+2

But this failure does not happen immediatly here, so after starting gitlab it works first for a short time.
After downgrading the packages again (except of ruby-view-component) it works again.

-- 
/*
Mit freundlichem Gruß / With kind regards,
  Patrick Matthäi
  GNU/Linux Debian Developer

   Blog:https://www.linux-dev.org/
E-Mail:pmatthaei at debian.org
         patrick at linux-dev.org
*/
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