[c-nsp] Possible memory corruption w/ 12.2(18)S11

[David Coulson]

12.2(18)S11 on 7507 w/ RSP4.

We've been seeing this frequently (IP address of source varies)

Mar 19 07:31:09 core1.clevoh.n2net.net 515: Mar 19 07:31:01:
%OSPF-4-ERRRCV: Received invalid packet: Bad Checksum from
207.166.192.208, GigabitEthernet4/0/0.100

If I do a 'memory cache-policy io uncached', it solves the problem,
however it kills the CPU on the router.

Is this potentially a hardware issue, or an IOS bug? We've moved the
interface to a seperate GEIP (different GEIP, GBIC, fiber, GBIC, switch)
and we get the same problem. We never encountered this on PA-FE or FEIPs.

Does anyone have any suggestions for troubleshooting this, before I just
go and load 12.2 on to it?

David