netdev - Re: [PATCH] net: Check skb->rxhash in gro

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Message-ID: <1389649012.31367.235.camel@edumazet-glaptop2.roam.corp.google.com>
Date:	Mon, 13 Jan 2014 13:36:52 -0800
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Tom Herbert <therbert@...gle.com>
Cc:	David Miller <davem@...emloft.net>,
	Linux Netdev List <netdev@...r.kernel.org>
Subject: Re: [PATCH] net: Check skb->rxhash in gro_receive

On Mon, 2014-01-13 at 13:24 -0800, Tom Herbert wrote:

> 
> Or maybe nobody uses IPIP. ;-)

The bug happened even without IPIP being used on the node.

Changing one byte from 0x45 to 0x40 was enough to trigger it.

Since we do not perform header checksum in flow dissector, normal
corrupted traffic on the Internet would have a chance to trigger the
infinite loop.


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