possible memory leak

[garlick]

Problem: diod 1.1.0 appears to leak memory during multi-user operation.

I have home directories mounted via 9P on some test nodes. When hitting it with a compilation workload on one node/one user, the diod memory usage as reported by `systemctl status diod`` shot up to 338M.

Early, before a recent restart, I had noticed it was up to nearly a gig.

Shutting down all the clients did not reduce the footprint (much)

● diod.service - 9P File Server
     Loaded: loaded (/lib/systemd/system/diod.service; enabled; preset: enabled)
     Active: active (running) since Tue 2025-11-25 07:13:00 PST; 2h 0min ago
   Main PID: 780 (diod)
      Tasks: 20 (limit: 9575)
     Memory: 335.7M
        CPU: 4min 10.358s
     CGroup: /system.slice/diod.service
             └─780 /usr/sbin/diod

Nov 25 07:13:00 picl0 systemd[1]: Starting diod.service - 9P File Server...
Nov 25 07:13:00 picl0 systemd[1]: Started diod.service - 9P File Server.
Nov 25 07:13:00 picl0 diod[780]: Listening on 0.0.0.0:564
Nov 25 07:13:00 picl0 diod[780]: Anyone can attach and access files as themselves
Nov 25 07:13:00 picl0 diod[780]: MUNGE authentication is required
Nov 25 07:31:04 picl0 diod[780]: checkauth(root@picl4:/nfshome): munge cred decode: Expired credential
Nov 25 07:31:04 picl0 diod[780]: attach(0@picl4:/nfshome): checkauth: Operationnot permitted