From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Mon, 26 Oct 2009 01:23:33 +0000 (+0000)
Subject: net: sysfs: ethtool_ops can be NULL
X-Git-Tag: v2.6.33-rc1~388^2~642
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ac5e3af9996fb911d4fdff910a8ac3cb7fc63a94;p=pandora-kernel.git

net: sysfs: ethtool_ops can be NULL

commit d519e17e2d01a0ee9abe083019532061b4438065
(net: export device speed and duplex via sysfs)
made the wrong assumption that netdev->ethtool_ops was always set.

This makes possible to crash kernel and let rtnl in locked state.

modprobe dummy
ip link set dummy0 up
(udev runs and crash)

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Andy Gospodarek <andy@greyhouse.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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