Strange IOC crash

[Benjamin Franksen <benjamin.franksen@bessy.de>]

Hi All

we have a strange IOC crash that today happened for the second time in about 
two weeks. This is what we see:

[Mon Nov 29 00:23:03 2010]../udpiiu.cpp: Undecipherable (payload too small) 
UDP msg from 127.0.0.1:1034 ignored
[Mon Nov 29 00:23:03 2010]../udpiiu.cpp: Undecipherable (payload too small) 
UDP msg from 127.0.0.1:1036 ignored
[Mon Nov 29 00:23:03 2010]
[Mon Nov 29 00:23:03 2010]Access Fault
[Mon Nov 29 00:23:03 2010]Program Counter: 0x0003d152
[Mon Nov 29 00:23:03 2010]Status Register: 0x3004
[Mon Nov 29 00:23:03 2010]Access Address : 0xcffea3c9
[Mon Nov 29 00:23:03 2010]Special Status : 0x0145
[Mon Nov 29 00:23:03 2010]Task: 0x838cd8 "CAS-event"
[Mon Nov 29 00:23:05 2010]filename="../../../src/libCom/taskwd/taskwd.c" 
line number=174
[Mon Nov 29 00:23:05 2010]task 0x838cd8 suspended
[Mon Nov 29 00:23:12 2010]interrupt: 
[Mon Nov 29 00:23:12 2010]ei0: reset

There has been no activity on this IOC during the last 12 hours, except 
periodic scanning of status and current readbacks over CAN bus.

This is under VxWorks 5.4.2 on an mv2100 board, EPICS base R3.14.8.2.

What is most strange is that the bad UDP message supposedly comes from 
localhost.

Any kind of suggestion as to what could cause this would be greatly 
appreciated.

Cheers
Ben