netdev - Re: [PATCH v2 net] macsec: Fix header length if SCI is added if explicitly disabled

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Message-ID: <20161024145024.GA17050@bistromath.localdomain>
Date:   Mon, 24 Oct 2016 16:50:24 +0200
From:   Sabrina Dubroca <sd@...asysnail.net>
To:     Tobias Brunner <tobias@...ongswan.org>
Cc:     "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: [PATCH v2 net] macsec: Fix header length if SCI is added if
 explicitly disabled

2016-10-24, 15:44:26 +0200, Tobias Brunner wrote:
> Even if sending SCIs is explicitly disabled, the code that creates the
> Security Tag might still decide to add it (e.g. if multiple RX SCs are
> defined on the MACsec interface).
> But because the header length so far only depended on the configuration
> option the SCI overwrote the original frame's contents (EtherType and
> e.g. the beginning of the IP header) and if encrypted did not visibly
> end up in the packet, while the SC flag in the TCI field of the Security
> Tag was still set, resulting in invalid MACsec frames.
> 
> Fixes: c09440f7dcb3 ("macsec: introduce IEEE 802.1AE driver")
> Signed-off-by: Tobias Brunner <tobias@...ongswan.org>

Acked-by: Sabrina Dubroca <sd@...asysnail.net>

-- 
Sabrina