Public bug reported:

pkexec attempts to close all file descriptors up to
sysconf(_SC_OPEN_MAX) before executing any commands.
See: 
https://github.com/polkit-org/polkit/blob/11c4a81f6f732e4b1887a96cab69a1ad6a000e00/src/programs/pkexec.c#L259-L267

As of 24.10, systemd is no longer compile for Ubuntu using the
-Dbump-proc-sys-fs-nr-open=false flag. The absence of this flag causes systemd
to set file descriptor limits to their maximum.

24.04 LTS: 
https://git.launchpad.net/ubuntu/+source/systemd/tree/debian/rules?h=ubuntu/noble#n82
24.10: 
https://git.launchpad.net/ubuntu/+source/systemd/tree/debian/rules?h=ubuntu/oracular

This is causing pkexec to sit attempting to close 1073741816 file descriptors
which takes several minutes every time it was called to install a lang pack.

** Affects: gnome-initial-setup (Ubuntu)
     Importance: Undecided
     Assignee: Matthew Hagemann (matt-hagemann)
         Status: New

** Changed in: gnome-initial-setup (Ubuntu)
     Assignee: (unassigned) => Matthew Hagemann (matt-hagemann)

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https://bugs.launchpad.net/bugs/2101825

Title:
  pkexec attempts to close all file descriptors up to
  sysconf(_SC_OPEN_MAX)

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