linux-kernel - Re: KASAN, xt_TCPMSS finally found nasty use-after-free bug? 4.10.8

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Date:   Sun, 02 Apr 2017 05:32:24 -0700
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     Denys Fedoryshchenko <nuclearcat@...learcat.com>
Cc:     Florian Westphal <fw@...len.de>,
        Linux Kernel Network Developers <netdev@...r.kernel.org>,
        Pablo Neira Ayuso <pablo@...filter.org>,
        Patrick McHardy <kaber@...sh.net>,
        Jozsef Kadlecsik <kadlec@...ckhole.kfki.hu>,
        netfilter-devel@...r.kernel.org, coreteam@...filter.org,
        linux-kernel@...r.kernel.org, netdev-owner@...r.kernel.org
Subject: Re: KASAN, xt_TCPMSS  finally found nasty use-after-free bug? 4.10.8

On Sun, 2017-04-02 at 15:25 +0300, Denys Fedoryshchenko wrote:
> >  	 */
> I will add also WARN_ON_ONCE(tcp_hdrlen >= 15 * 4) before, for 
> curiosity, if this condition are triggered. Is it fine like that?

Sure.