netdev - Re: NULL pointer dereference panic in stable (2.6.33.2), amd64

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Date:	Mon, 12 Apr 2010 00:36:00 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	krkumar2@...ibm.com, netdev@...r.kernel.org,
	nuclearcat@...learcat.com
Subject: Re: NULL pointer dereference panic in stable (2.6.33.2), amd64

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Mon, 12 Apr 2010 09:18:17 +0200

> Here the patch I cooked, this is a stable candidate, once tested and
> acknowledged.
> 
> [PATCH] 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@...learcat.com>
> Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>

Looks good Eric.  I'll integrate this into net-2.6 and also queue it
up for -stable in a day or two unless some problem is discovered.

Thanks!
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