netdev - Re: [PATCH] ipv6: Fix udp checksums with raw sockets

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Date:	Thu, 14 May 2015 22:27:32 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	vyasevich@...il.com
Cc:	netdev@...r.kernel.org, vyasevic@...hat.com, linux@...m.de,
	eric.dumazet@...il.com
Subject: Re: [PATCH] ipv6: Fix udp checksums with raw sockets

From: Vladislav Yasevich <vyasevich@...il.com>
Date: Thu, 14 May 2015 20:34:08 -0400

> It was reported that trancerout6 would cause
> a kernel to crash when trying to compute checksums
> on raw UDP packets.  The cause was the check in
> __ip6_append_data that would attempt to use
> partial checksums on the packet.  However,
> raw sockets do not initialize partial checksum
> fields so partial checksums can't be used.
> 
> Solve this the same way IPv4 does it.  raw sockets
> pass transhdrlen value of 0 to ip_append_data which
> causes the checksum to be computed in software.  Use
> the same check in ip6_append_data (check transhdrlen).
> 
> Reported-by: Wolfgang Walter <linux@...m.de>
> CC: Wolfgang Walter <linux@...m.de>
> CC: Eric Dumazet <eric.dumazet@...il.com>
> Signed-off-by: Vladislav Yasevich <vyasevic@...hat.com>

Applied.... This seems like -stable material?  If so, how far
back?

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