netdev - Re: [PATCH 6.1-rc6] l2tp: call udp_tunnel_encap_enable() and sock_release() without sk_callback

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Message-ID: <32329c44-1dd6-9ded-3165-811a4e7e0a66@I-love.SAKURA.ne.jp>
Date:   Fri, 18 Nov 2022 22:19:10 +0900
From:   Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
To:     Eric Dumazet <edumazet@...gle.com>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        David Ahern <dsahern@...nel.org>,
        Jakub Sitnicki <jakub@...udflare.com>,
        Tom Parkin <tparkin@...alix.com>,
        syzbot <syzbot+703d9e154b3b58277261@...kaller.appspotmail.com>,
        netdev@...r.kernel.org, syzkaller-bugs@...glegroups.com,
        Haowei Yan <g1042620637@...il.com>
Subject: Re: [PATCH 6.1-rc6] l2tp: call udp_tunnel_encap_enable() and
 sock_release() without sk_callback_lock

On 2022/11/18 21:36, Eric Dumazet wrote:
> Please look at recent discussion, your patch does not address another
> fundamental problem.
> 
> Also, Jakub was working on a fix already. Perhaps sync with him to
> avoid duplicate work.

I can't afford monitoring all mailing lists. Since a thread at syzkaller-bugs group
did not get that information, I started this work. Please consider including
syzbot+XXXXXXXXXXXXXXXXXXXX@...kaller.appspotmail.com into the discussions so that
we can google for recent discussions (if any) using mail address as a keyword.

> 
> https://lore.kernel.org/netdev/20221114191619.124659-1-jakub@cloudflare.com/T/
> 
> Thanks.