linux-kernel - Re: [PATCH] Add missing skb->dev assignment in Frame Relay RX code

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Message-ID: <486E1404.8090704@garzik.org>
Date:	Fri, 04 Jul 2008 08:13:56 -0400
From:	Jeff Garzik <jeff@...zik.org>
To:	Krzysztof Halasa <khc@...waw.pl>
CC:	Andrew Morton <akpm@...ux-foundation.org>, netdev@...r.kernel.org,
	lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] Add missing skb->dev assignment in Frame Relay RX code

Krzysztof Halasa wrote:
> Hi,
> 
> Commit 4c13eb6657fe9ef7b4dc8f1a405c902e9e5234e0 ([ETH]: Make
> eth_type_trans set skb->dev like the other *_type_trans) removed
> skb->dev assignment from hdlc_fr.c:fr_rx(). Unfortunately it was also
> needed for cases other than eth_type_trans().
> 
> Adding it back.
> 
> It's quite serious and may be a security risk as it causes a wrong
> input interface indication (the physical hdlcX instead of logical
> pvcX). Probably -stable class fix.
> 
> Signed-off-by: Krzysztof Halasa <khc@...waw.pl>
> 
> diff --git a/drivers/net/wan/hdlc_fr.c b/drivers/net/wan/hdlc_fr.c
> index c4ab032..3a86e64 100644
> --- a/drivers/net/wan/hdlc_fr.c
> +++ b/drivers/net/wan/hdlc_fr.c
> @@ -1008,6 +1008,7 @@ static int fr_rx(struct sk_buff *skb)
>  		stats->rx_bytes += skb->len;
>  		if (pvc->state.becn)
>  			stats->rx_compressed++;
> +		skb->dev = dev;
>  		netif_rx(skb);
>  		return NET_RX_SUCCESS;
>  	} else {

applied


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