netdev - Re: [PATCH net-2.6 2/2] ethtool: Fix potential user buffer overflow for ETHTOOL

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Message-Id: <20100629.010110.184836313.davem@davemloft.net>
Date:	Tue, 29 Jun 2010 01:01:10 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	bhutchings@...arflare.com
Cc:	netdev@...r.kernel.org, santwona.behera@....com
Subject: Re: [PATCH net-2.6 2/2] ethtool: Fix potential user buffer
 overflow for ETHTOOL_{G,S}RXFH

From: Ben Hutchings <bhutchings@...arflare.com>
Date: Mon, 28 Jun 2010 19:45:58 +0100

> struct ethtool_rxnfc was originally defined in 2.6.27 for the
> ETHTOOL_{G,S}RXFH command with only the cmd, flow_type and data
> fields.  It was then extended in 2.6.30 to support various additional
> commands.  These commands should have been defined to use a new
> structure, but it is too late to change that now.
> 
> Since user-space may still be using the old structure definition
> for the ETHTOOL_{G,S}RXFH commands, and since they do not need the
> additional fields, only copy the originally defined fields to and
> from user-space.
> 
> Signed-off-by: Ben Hutchings <bhutchings@...arflare.com>
> Cc: stable@...nel.org

Applied.
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