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Created attachment 1654848 [details]
Reproduce script

Description of problem:

Will hit the maximum open fd.

Version-Release number of selected component (if applicable):
NetworkManager-1.22.0-2.el8.x86_64.rpm

How reproducible:
100%

Steps to Reproduce:
1. sudo ./nm_client_cleanup.py
2.
3.

Actual results:

Crash as hit the maximum opened descriptor

Expected results:
No crash

Additional info:

*** Bug 1777798 has been marked as a duplicate of this bug. ***

this should be fixed on master (1.23.x) and 1.22.6+ (commit c2f8400e6606918873505280d0edff3577e7d7ab).

this is covered by nmstate's test:
tests/integration/mem_leak_test.py::test_libnmstae_show_fd_leak

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2020:1847