Bug#897654: libpam-systemd: "Failed to create session: No such process"

[Michael Gold]

retitle 897654 libpam-systemd: hidepid causes "Failed to create session: No such process"
thanks

On Thu, May 03, 2018 at 22:53:34 +0200, Michael Biebl wrote:
> On Thu, 3 May 2018 16:31:53 -0400 Michael Gold <mgold at qnx.com> wrote:
> > 	Apr 09 11:37:30 golbez lightdm[14767]: pam_systemd(lightdm:session): pam-systemd initializing
> > 	Apr 09 11:37:30 golbez lightdm[14767]: pam_systemd(lightdm:session): Asking logind to create session: uid=1000 pid=14767 service=lightdm type=x11 class=user desktop=lightdm-xsession seat=seat0 vtnr=7 tty= display=:0 remote=no remote_user= remote_host=
> > 	Apr 09 11:37:30 golbez lightdm[14767]: pam_systemd(lightdm:session): Failed to create session: No such process
...
> Are you using hidepid?

Yes, "proc /proc proc rw,relatime,gid=4,hidepid=2 0 0".  After running
"mount /proc -o remount,hidepid=0" I logged in on a VT and saw a session
in the list.

(I was wrong about this working on the other system.  I'm using the same
mount options there and also have 0 sessions, at least over ssh.)

Thanks for the quick response.  Is this problem already tracked?  Any
idea why it would happen, given that systemd-logind is running as root?

-- Michael
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