From: Eli Cohen <eli@mellanox.co.il>
Date: Tue, 28 Feb 2006 04:47:43 +0000 (-0800)
Subject: IPoIB: Close race in setting mcast->ah
X-Git-Tag: v2.6.17-rc1~1180^2~22
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7343b231f22cec11f069bcdbb0c9a417df2750d3;p=pandora-kernel.git

IPoIB: Close race in setting mcast->ah

ipoib_mcast_send() tests mcast->ah twice.  If this value is changed
between these two points, we leak an skb.  However,
ipoib_mcast_join_finish() sets mcast->ah with no locking, so it could
race against ipoib_mcast_send().

As a solution, take priv->lock around assignment to mcast->ah thus
making sure ipoib_mcast_send() (which also takes priv->lock) is not in
flight.

Signed-off-by: Eli Cohen <eli@mellanox.co.il>
Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
---

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