linux-kernel - Re: [PATCH] tcp: fix race condition when creating child sockets from syncookies

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Message-ID: <20201023165435.GA322147@rdias-suse-pc.lan>
Date:   Fri, 23 Oct 2020 17:54:35 +0100
From:   Ricardo Dias <rdias@...sql.com>
To:     Eric Dumazet <edumazet@...gle.com>
Cc:     David Miller <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Alexey Kuznetsov <kuznet@....inr.ac.ru>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        netdev <netdev@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] tcp: fix race condition when creating child sockets from
 syncookies

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@...sql.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!