From: Willem de Bruijn <willemdebruijn.kernel@gmail.com>
To: Eric Dumazet <edumazet@google.com>
Cc: "David S . Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Paolo Abeni <pabeni@redhat.com>,
netdev@vger.kernel.org, eric.dumazet@gmail.com,
Kuniyuki Iwashima <kuniyu@amazon.com>,
Willem de Bruijn <willemb@google.com>
Subject: Re: [PATCH net] af_packet: do not use READ_ONCE() in packet_bind()
Date: Fri, 26 May 2023 12:09:04 -0400 [thread overview]
Message-ID: <CAF=yD-Jynh-wBDDFUVUsZ9yv4KMjY6tXSytF5sF=aqfEqTvF9w@mail.gmail.com> (raw)
In-Reply-To: <20230526154342.2533026-1-edumazet@google.com>
On Fri, May 26, 2023 at 11:43 AM Eric Dumazet <edumazet@google.com> wrote:
>
> A recent patch added READ_ONCE() in packet_bind() and packet_bind_spkt()
>
> This is better handled by reading pkt_sk(sk)->num later
> in packet_do_bind() while appropriate lock is held.
>
> READ_ONCE() in writers are often an evidence of something being wrong.
>
> Fixes: 822b5a1c17df ("af_packet: Fix data-races of pkt_sk(sk)->num.")
> Signed-off-by: Eric Dumazet <edumazet@google.com>
> Cc: Kuniyuki Iwashima <kuniyu@amazon.com>
> Cc: Willem de Bruijn <willemb@google.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Thanks for catching this Eric.
next prev parent reply other threads:[~2023-05-26 16:09 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-26 15:43 [PATCH net] af_packet: do not use READ_ONCE() in packet_bind() Eric Dumazet
2023-05-26 16:09 ` Willem de Bruijn [this message]
2023-05-26 16:14 ` Jiri Pirko
2023-05-26 16:23 ` Kuniyuki Iwashima
2023-05-30 5:20 ` patchwork-bot+netdevbpf
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