netdev - Re: [PATCH ipsec-next] xfrm: Do not parse 32bits compiled xfrm netlink msg on 64bits host

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Message-Id: <20150126.233938.513240875461315013.davem@davemloft.net>
Date:	Mon, 26 Jan 2015 23:39:38 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	fan.du@...el.com
Cc:	steffen.klassert@...unet.com, herbert@...dor.apana.org.au,
	netdev@...r.kernel.org, fengyuleidian0615@...il.com
Subject: Re: [PATCH ipsec-next] xfrm: Do not parse 32bits compiled xfrm
 netlink msg on 64bits host

From: Fan Du <fan.du@...el.com>
Date: Tue, 27 Jan 2015 10:54:22 +0800

> @@ -2419,6 +2419,11 @@ static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
>  	const struct xfrm_link *link;
>  	int type, err;
>  
> +#ifdef CONFIG_COMPAT
> +	if (is_compat_task())
> +		return -EPERM;
> +#endif
> +

This seems more like an unsupported operation rather then a permission
problem.
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