From mboxrd@z Thu Jan  1 00:00:00 1970
From: Patrick McHardy <kaber@trash.net>
Subject: Re: [PATCH 5/9] netfilter: xtables: limit xt_mac to ethernet devices
Date: Wed, 17 Mar 2010 14:31:29 +0100
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References: <1268831945-6041-1-git-send-email-jengelh@medozas.de> <1268831945-6041-6-git-send-email-jengelh@medozas.de>
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Cc: netfilter-devel@vger.kernel.org
To: Jan Engelhardt <jengelh@medozas.de>
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Jan Engelhardt wrote:
> I do not see a point of allowing the MAC module to work with devices
> that don't possibly have one, e.g. various tunnel interfaces such as
> tun and sit.

> @@ -29,6 +30,8 @@ static bool mac_mt(const struct sk_buff *skb, const struct xt_match_param *par)
>  	const struct xt_mac_info *info = par->matchinfo;
>  	bool ret;
>  
> +	if (skb->dev == NULL || skb->dev->type != ARPHRD_ETHER)
> +		return false;

What about the ~60 ARPHRD values that are not tunnels and sit?