Syslog reached 86GB: avahi-daemon loop on ThinkPad L15 Gen 4

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Hello Zorin Team,

I'm reporting a critical log-filling issue on Zorin OS 18. My /var/log/syslog reached 86 GB due to a loop in avahi-daemon.

The Error: Hundreds of entries per second with the following message: avahi-daemon: Failed to recv from netlink socket: Permission denied (13)

Diagnostics:

Model: Lenovo ThinkPad L15 Gen 4 (21H3003CMZ)

Kernel: 6.14.0-37-generic

Suspected Cause: AppArmor is blocking avahi-daemon from accessing netlink sockets, causing an infinite error loop.

System Info:
Plaintext

Linux ThinkPad-L15-Gen-4 6.14.0-37-generic #37~24.04.1-Ubuntu
Active: active (running) since Sat 2026-01-03 00:36:01 WET

Workaround used: I had to mask the avahi-daemon service to save my SSD from excessive writes.

Thanks.