From: Hannes Frederic Sowa <hannes@stressinduktion.org>
Date: Mon, 20 Jan 2014 04:16:39 +0000 (+0100)
Subject: ipv6: protect protocols not handling ipv4 from v4 connection/bind attempts
X-Git-Tag: v3.14-rc1~94^2~60
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=82b276cd2b0bacd58e7c307bf8856925a68c4d14;p=pandora-kernel.git

ipv6: protect protocols not handling ipv4 from v4 connection/bind attempts

Some ipv6 protocols cannot handle ipv4 addresses, so we must not allow
connecting and binding to them. sendmsg logic does already check msg->name
for this but must trust already connected sockets which could be set up
for connection to ipv4 address family.

Per-socket flag ipv6only is of no use here, as it is under users control
by setsockopt.

Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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