From: Eric Dumazet <redacted>
Date: Wed, 29 Sep 2010 21:04:32 +0200

[PATCH net-next-2.6] 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 <redacted>
Signed-off-by: Eric Dumazet <redacted>

Applied.