netdev - Re: [PATCH net v2] net: sockmap: avoid race between sock_map_destroy() and sk_psock

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Message-ID: <b9ff79ae-e42b-4f9c-b32f-a86b1e48f0cd@yandex.ru>
Date: Thu, 19 Sep 2024 12:26:14 +0300
From: Dmitry Antipov <dmantipov@...dex.ru>
To: Paolo Abeni <pabeni@...hat.com>, John Fastabend
 <john.fastabend@...il.com>, Jakub Sitnicki <jakub@...udflare.com>
Cc: Cong Wang <xiyou.wangcong@...il.com>, Jakub Kicinski <kuba@...nel.org>,
 netdev@...r.kernel.org, lvc-project@...uxtesting.org,
 syzbot+f363afac6b0ace576f45@...kaller.appspotmail.com
Subject: Re: [PATCH net v2] net: sockmap: avoid race between
 sock_map_destroy() and sk_psock_put()

On 9/19/24 11:51 AM, Paolo Abeni wrote:

> I think there is still Cong question pending: why this could not/ should not be addressed instead in the RDS code.

Hm. Except 'rds_tcp_accept_xxx()' functions, the rest of the backtrace
is contributed by generic TCP and IP things. I've tried to debug this
issue starting from the closest innards and seems found an issue within
sockmap code. Anyway, I'm strongly disagree with "unless otherwise proven,
there are a lot of bugs everywhere except the subsystem I'm responsible
to" bias, assuming that a bit more friendly and cooperative efforts
should give us the better results.

Dmitry