Looks like the issue starts when connect a USB wifi dongle (based on ath9k_htc).
After a fresh NetworkManager restart, journalctl shows that USB device is enumerated periodically, and for some reasons, failed to be configured correctly.
We can conclude that there is a FD leakage every time a new interface is inserted/removed.
I will check what is wrong with the enumeration/configuration.
Looks like the issue starts when connect a USB wifi dongle (based on ath9k_htc).
After a fresh NetworkManager restart, journalctl shows that USB device is enumerated periodically, and for some reasons, failed to be configured correctly.
We can conclude that there is a FD leakage every time a new interface is inserted/removed.
I will check what is wrong with the enumeration/ configuration.