From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Wed, 29 Sep 2010 20:23:09 +0000 (-0700)
Subject: net: add a recursion limit in xmit path
X-Git-Tag: v2.6.37-rc1~147^2~319
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=745e20f1b626b1be4b100af5d4bf7b3439392f8f;p=pandora-kernel.git

net: add a recursion limit in xmit path

As tunnel devices are going to be lockless, we need to make sure a
misconfigured machine wont enter an infinite loop.

Add a percpu variable, and limit to three the number of stacked xmits.

Reported-by: Jesse Gross <jesse@nicira.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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