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Date:	Mon, 12 May 2014 20:54:17 +0200
From:	Lukas Tribus <>
To:	David Newall <>,
	Eric Dumazet <>,
	Bandan Das <>
CC:	Netdev <>, "" <>
Subject: RE: Bad checksum on bridge with IP options

> I've got a patch which fixes the faulty checksums, and now ping works
> with RR or TS set. I'm not quite sure, though, that it fixes the right
> thing. I wonder if the problem is less that the checksum becomes wrong,
> and more that the route and timestamps ought not to be changed by the
> bridge interface.

Looks like your testcase:
- works in 2.6.36 and older
- crashes starting with 2.6.37 (-rc1), likely due to Bandan's commit 462fb2af9788a82 (bridge : Sanitize skb before it enters the IP stack) [1]
- crash fix is in, likely due to Eric's commit f8e9881c2aef1e9 (bridge: reset IPCB in br_parse_ip_options) [2]
- doesn't work post-crashfix

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