[Bug 1957024] Re: pam-mkhomedir does not honor private home directories

[Ponnuvel Palaniyappan]

Thanks, Alex!

Do you think this could be backported (SRU'ed) existing releases (Noble,
and Jammy at least) once merged into Plucky or not recommend? It depends
on the risk factor as well as whether you think this is a feature or
bug.

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Title:
  pam-mkhomedir does not honor private home directories

Status in pam package in Ubuntu:
  In Progress

Bug description:
  As reported in https://discourse.ubuntu.com/t/private-home-
  directories-for-ubuntu-21-04-onwards/19533/13:

  A common situation is to have a central set of users (e.g. in LDAP)
  and use pam_mkhomedir.so to create the home directory when the user
  first logs in.

  These changes do not cover this situation. The default configuration
  of pam_mkhomedir.so will result in a home directory created with 0755
  permissions.

  To make pam_mkhomedir.so create a home directory by default with
  permissions consistent with the other tools then a umask argument can
  be added to the pam_mkhomedir.so module in the file /usr/share/pam-
  configs/mkhomedir. I believe this would have to be done before
  enabling the module. The file is part of the libpam-modules package.

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