linux-kernel - Re: [PATCH] tcp: fix setting csum_start in tcp_gso

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Message-ID: <CA+55aFxyZP_jXT-bLyFjJMp4WfVZp5vFtpu+-6_qCi46xkceQg@mail.gmail.com>
Date:	Tue, 24 Jun 2014 21:17:25 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Tom Herbert <therbert@...gle.com>
Cc:	David Miller <davem@...emloft.net>, Dave Jones <davej@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Network Development <netdev@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] tcp: fix setting csum_start in tcp_gso_segment

On Tue, Jun 24, 2014 at 9:03 PM, Tom Herbert <therbert@...gle.com> 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@...hat.com>

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?

               Linus
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