From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Sun, 11 Apr 2010 21:18:17 +0000 (+0000)
Subject: net: dev_pick_tx() fix
X-Git-Tag: v2.6.34-rc5~5^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8728c544a9cbdcb0034aa5c45706c5f953f030ee;p=pandora-kernel.git

net: dev_pick_tx() fix

When dev_pick_tx() caches tx queue_index on a socket, we must check
socket dst_entry matches skb one, or risk a crash later, as reported by
Denys Fedorysychenko, if old packets are in flight during a route
change, involving devices with different number of queues.

Bug introduced by commit a4ee3ce3
(net: Use sk_tx_queue_mapping for connected sockets)

Reported-by: Denys Fedorysychenko <nuclearcat@nuclearcat.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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