Re: [PATCH] tcp: fix setting csum_start in tcp_gso_segment

From: David Miller
Date: Wed Jun 25 2014 - 14:53:07 EST


From: Dave Jones <davej@xxxxxxxxxx>
Date: Wed, 25 Jun 2014 10:10:52 -0400

> On Tue, Jun 24, 2014 at 09:17:25PM -0700, Linus Torvalds wrote:
> > On Tue, Jun 24, 2014 at 9:03 PM, Tom Herbert <therbert@xxxxxxxxxx> wrote:
> > >
> > > It looks like a likely culprit is that SKB_GSO_CB()->csum_start is
> > > not set correctly when doing non-scatter gather. We are using
> > > offset as opposed to doffset.
> > >
> > > Reported-by: Dave Jones <davej@xxxxxxxxxx>
> >
> > DaveJ, I think you triggered this in five minutes on your box, and I
> > don't recall seeing anybody else reporting the oops (and google
> > doesn't find anything in the last month). So it's presumably somewhat
> > hw-specific. Does this fix the problem?
>
> It's survived routing ~1GB of packets overnight, so I'd call this good.

Tom, please adjust the Subject line as suggested by Eric Dumazet and add
a Tested-by: for Dave.

Thanks!
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