[Regression][3.12] bridge: fix NULL pointer deref of br_port_get_rcu

[Joseph Salisbury]

Hi Hong,

A kernel bug was opened against Ubuntu [0].  After a kernel bisect, it
was found that reverting the following commit resolved
this bug:

commit 716ec052d2280d511e10e90ad54a86f5b5d4dcc2
Author: Hong Zhiguo <zhiguohong@xxxxxxxxxxx>
Date:   Sat Sep 14 22:42:28 2013 +0800

    bridge: fix NULL pointer deref of br_port_get_rcu


The regression was introduced as of v3.12-rc2 and has made it into some
of the stable trees(3.10 and 3.11).

I was thinking of requesting a revert for this commit, but I wanted to
get your feedback first, since you are the patch author.


Thanks,

Joe


[0] http://pad.lv/1249880
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