[Samba] Random disconnects from Mac OS X clients

[Moritz Kobel]

Hello,

our Mac OS X clients have random disconnects from the server.

The only thing I can see in log.smbd is:

--8<-------
[2025/04/24 12:01:55.159699,  0]
../../source3/smbd/smb2_server.c:1190(smbXsrv_connection_get_rto_usecs)
  smbXsrv_connection_get_rto_usecs: getsockopt(TCP_INFO) errno[9/Bad
  file descriptor] -s NT_STATUS_INVALID_HANDLE
--8<-------

Version: 4.17.12+dfsg-0+deb12u1
Running on Debian 12.10, virtualized using Incus (LXC), with Kernel 6.1.0-29-amd64

Samba is configured with user-level security. fruit:aapl is enabled.


We have up to 20 users and expirience 0 - 8 disconnects (in total) a
day.


How can I find the cause of this issue?

Tank you for any advice.

Best regards,

Moritz

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