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Date:   Fri, 23 Oct 2020 17:54:35 +0100
From:   Ricardo Dias <rdias@memsql.com>
To:     Eric Dumazet <edumazet@google.com>
Cc:     David Miller <davem@davemloft.net>,
        Jakub Kicinski <kuba@kernel.org>,
        Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>,
        Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>,
        netdev <netdev@vger.kernel.org>,
        LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] tcp: fix race condition when creating child sockets from
 syncookies
Message-ID: <20201023165435.GA322147@rdias-suse-pc.lan>
References: <20201023111352.GA289522@rdias-suse-pc.lan>
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 <20201023155145.GA316015@rdias-suse-pc.lan>
 <CANn89iL2VOH+Mg9-U7pkpMkKykDfhoX-GMRnF-oBmZmCGohDtA@mail.gmail.com>
 <20201023160628.GA316690@rdias-suse-pc.lan>
 <CANn89i+OZF2HJQYT0FGtzyFeZMdof9RAfGXQRKUVY6Hg9ZPpcg@mail.gmail.com>
 <20201023164825.GA321826@rdias-suse-pc.lan>
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On Fri, Oct 23, 2020 at 06:51:05PM +0200, Eric Dumazet wrote:
> On Fri, Oct 23, 2020 at 6:48 PM Ricardo Dias <rdias@memsql.com> wrote:
> >
> 
> > In that case, I can change the patch to only iterate the ehash bucket
> > only when the listening socket is using the loopback interface, correct?
> 
> No, the fix should be generic.
> 
> We could still have bad NIC, or bad configuration, spreading packets
> on random cpus ;)

Ah, got it!