From: Jiri Pirko <jiri@resnulli.us>
Date: Sat, 8 Jun 2013 13:00:54 +0000 (+0200)
Subject: team: move add to port list before port enablement
X-Git-Tag: v3.10-rc6~18^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=72df935d985c1575ed44ad2c8c653b28147993fa;p=pandora-kernel.git

team: move add to port list before port enablement

team_port_enable() adds port to port_hashlist. Reader sees port
in team_get_port_by_index_rcu() and returns it, but
team_get_first_port_txable_rcu() tries to go through port_list, where the
port is not inserted yet -> NULL pointer dereference.
Fix this by reordering port_list and port_hashlist insertion.
Panic is easily triggeable when txing packets and adding/removing port
in a loop.

Introduced by commit 3d249d4c "net: introduce ethernet teaming device"

Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>
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