linux-kernel - Re: [PATCH net-next] hyperv: Add processing of MTU reduced by the host

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Message-Id: <20141112.144640.703336197189868183.davem@davemloft.net>
Date:	Wed, 12 Nov 2014 14:46:40 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	haiyangz@...rosoft.com
Cc:	netdev@...r.kernel.org, kys@...rosoft.com, olaf@...fle.de,
	jasowang@...hat.com, linux-kernel@...r.kernel.org,
	driverdev-devel@...uxdriverproject.org
Subject: Re: [PATCH net-next] hyperv: Add processing of MTU reduced by the
 host

From: Haiyang Zhang <haiyangz@...rosoft.com>
Date: Tue, 11 Nov 2014 15:27:52 -0800

> -	if (mtu < 68 || mtu > limit)
> +	if (mtu < ETH_DATA_LEN || mtu > limit)
>  		return -EINVAL;

This is not correct.

The test is against the minimally supported MTU, which should
be 68 not ETH_DATA_LEN which is 1500.
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