segfault error on x86_64

[bvds]

I have kernel 2.4.22 compiled with gcc 3.3 running on a 
dual AMD Opteron (in 64 bit mode).  
There is an error message that occurs about twice a day at random times:

Sep 30 23:45:00 gideon kernel: bumps[12960]: segfault at 0000002a95611000 rip 0000000000402150 rsp 0000007fbffff1a8 error 6
Oct  1 10:26:57 gideon kernel: bumps[13510]: segfault at 0000002a95611000 rip 0000000000402150 rsp 0000007fbffff1a8 error 6

As far as I can tell, there is no other effect than this message.
(the system keeps running OK).

What is "bumps" ?

BvdS
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