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Date: Tue, 05 Nov 2013 22:10:25 -0500 (EST) From: David Miller <davem@...emloft.net> To: hannes@...essinduktion.org Cc: Saran.Neti@...us.com, netdev@...r.kernel.org, pshelar@...ira.com, tsl-vulnerability-research@...us.com Subject: Re: [PATCH net] ipv6: fix headroom calculation in udp6_ufo_fragment From: Hannes Frederic Sowa <hannes@...essinduktion.org> Date: Tue, 5 Nov 2013 02:41:27 +0100 > Commit 1e2bd517c108816220f262d7954b697af03b5f9c ("udp6: Fix udp > fragmentation for tunnel traffic.") changed the calculation if > there is enough space to include a fragment header in the skb from a > skb->mac_header dervived one to skb_headroom. Because we already peeled > off the skb to transport_header this is wrong. Change this back to check > if we have enough room before the mac_header. > > This fixes a panic Saran Neti reported. He used the tbf scheduler which > skb_gso_segments the skb. The offsets get negative and we panic in memcpy > because the skb was erroneously not expanded at the head. > > Reported-by: Saran Neti <Saran.Neti@...us.com> > Cc: Pravin B Shelar <pshelar@...ira.com> > Signed-off-by: Hannes Frederic Sowa <hannes@...essinduktion.org> Applied and queued up for -stable, thanks Hannes. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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