[openib-general] BUG ipoib oops in iptables/netfilter

[Hal Rosenstock]

Hi Grant,

On Tue, 2005-03-29 at 11:55, Grant Grundler wrote:
> On Tue, Mar 29, 2005 at 06:51:20AM -0800, Roland Dreier wrote:
> > This is just a conjecture, but I see ipt_ulog_packet in your crash
> > stack trace.  Looking at the source to ipt_ulog_packet, I see that it
> > can access skb->mac.raw.  Prior to Hal's patch, which I just checked
> > in today, skb->mac.raw was never initialized and hence could point off
> > into space.  So this could be causing the oops.
> 
> Yup - sounds reasonable.
> 
> > It would be worth updating your ipoib driver to the latest svn and
> > seeing if you can still reproduce the crash.
> 
> I'll try that. I hope I've got the recipe right to reproduce this.
> 
> > BTW I'm not sure running traffic through netfilter is going to give
> > you the best possible performance.
> 
> I agree. I've disabled it. 

The latter (disabling netfilter/iptables) should be done after verifying
that the crash goes away with the ipoib_ib.c change.

Thanks.

-- Hal