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Date: Mon, 1 Jun 2026 19:05:43 -0700
From: Jakub Kicinski <kuba@kernel.org>
To: Yizhou Zhao <zhaoyz24@mails.tsinghua.edu.cn>
Cc: netdev@vger.kernel.org, "David S . Miller" <davem@davemloft.net>, Eric
 Dumazet <edumazet@google.com>, Paolo Abeni <pabeni@redhat.com>, Simon
 Horman <horms@kernel.org>, Kees Cook <kees@kernel.org>,
 linux-kernel@vger.kernel.org, Yuxiang Yang
 <yangyx22@mails.tsinghua.edu.cn>, Ao Wang <wangao@seu.edu.cn>, Xuewei Feng
 <fengxw06@126.com>, Qi Li <qli01@tsinghua.edu.cn>, Ke Xu
 <xuke@tsinghua.edu.cn>
Subject: Re: [PATCH net] vlan: prevent unsigned underflow in VLAN MTU
 calculation over MACsec
Message-ID: <20260601190543.33d42ef8@kernel.org>
In-Reply-To: <20260529062135.70490-1-zhaoyz24@mails.tsinghua.edu.cn>
References: <20260529062135.70490-1-zhaoyz24@mails.tsinghua.edu.cn>
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On Fri, 29 May 2026 14:21:33 +0800 Yizhou Zhao wrote:
> +	if (netif_reduces_vlan_mtu(real_dev)) {
> +		if (real_dev->mtu < VLAN_HLEN)
> +			return -EINVAL;
> +		max_mtu = real_dev->mtu - VLAN_HLEN;
> +	} else {
> +		max_mtu = real_dev->mtu;
> +	}

Does not apply, please rebase on net and repost.
-- 
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