netdev - Re: [regression] TCP_MD5SIG on established sockets

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Message-ID: <20200701035014.GA7384@gondor.apana.org.au>
Date:   Wed, 1 Jul 2020 13:50:14 +1000
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     Eric Dumazet <edumazet@...gle.com>
Cc:     Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        David Miller <davem@...emloft.net>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        LKML <linux-kernel@...r.kernel.org>,
        netdev <netdev@...r.kernel.org>,
        Yuchung Cheng <ycheng@...gle.com>,
        Jonathan Rajotte-Julien <joraj@...icios.com>
Subject: Re: [regression] TCP_MD5SIG on established sockets

On Tue, Jun 30, 2020 at 08:36:51PM -0700, Eric Dumazet wrote:
>
> If I knew so many people were excited about TCP / MD5, I would have
> posted all my patches on lkml ;)
> 
> Without the smp_wmb() we would still need something to prevent KMSAN
> from detecting that we read uninitialized bytes,
> if key->keylen is increased.  (initial content of key->key[] is garbage)
> 
> Something like this :

LGTM.  Thanks,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt