Athanasius wrote:

  I'll compile up a new kernel, likely 2.6.22.6, plus this patch, and
reboot to it tonight.  I still don't know *exactly* how to trigger the
bug on demand though, it's not reocurred since I posted the bug report
(but had happened about a week before as well).

Thanks. I'm not sure either, it would require two concurrent requests
to be processed, but AFAICS oidentd only uses a single netlink socket.
Perhaps multiple running instances or something else using the inet_diag
interface?

You might be able to trigger it without this patch by running
"while true; do ss -tn; done" while doing ident queries, but
just running the while loop a couple of times in parallel
doesn't seem to trigger it here.