Bus-error hardware or software?

[Mark]

Every once in a while, an httpd (Apache 3.28) child exits with a seg-fault of sorts. I hope someone can tell me whether or not this is hardware-related:

asarian-host.net kernel log messages:
> 9 10/100BaseTX> port 0xa000-0xa0ff mem 0xda000000-0xda0000ff irq 11 at device 13.0 on pci0
> pid 15369 (httpd), uid 65534: exited on signal 11

asarian-host.net kernel log messages:
> da0000ff irq 11 at device 13.0 on pci0
> pid 1478 (httpd), uid 65534: exited on signal 10

It seems to me a matter of software; a read on a wrong memory address, to be precise. But since the log talks about a device on a pci bus, and one of the signals is a bus error (signal 10), maybe it is hardware after all.

I must say, though, that I only ever experience this with the http daemon. The rest is rock-solid. Any diagnostic help is appreciated.

Thanks,

- Mark