From: Florian Westphal <fw@strlen.de>
Date: Thu, 21 May 2015 22:06:40 +0000 (+0200)
Subject: ip: reject too-big defragmented DF-skb when forwarding
X-Git-Tag: omap-for-v4.2/fixes-rc1^2~134^2~228
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cf826244322443215c156c0751fa2c982969a9c9;p=pandora-kernel.git

ip: reject too-big defragmented DF-skb when forwarding

Send icmp pmtu error if we find that the largest fragment of df-skb
exceeded the output path mtu.

The ip output path will still catch this later on but we can avoid the
forward/postrouting hook traversal by rejecting right away.

This is what ipv6 already does.

Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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