Weird error message

[Ramon Gandia <rfg nook net>]

Running 4.2 with the 2.0.36 kernel.  Up for weeks now, and today
I got this one show up on the console.  Just the one time, but
I don't know what it is.  Nothing in /var/log/messages:

prompt # TCP: **bug**: copy=0, sk->mss=0

Scary.  What is it?

-- 
Ramon Gandia ================= Sysadmin ================ Nook Net
http://www.nook.net                                  rfg nook net
285 West First Avenue                           tel. 907-443-7575
P.O. Box 970                                    fax. 907-443-2487
Nome, Alaska 99762-0970 ========== Alaska Toll Free. 888-443-7525