netdev - Re: [PATCH net] tcp: properly terminate timers for kernel sockets

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Date: Fri, 22 Mar 2024 15:47:04 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Eric Dumazet <edumazet@...gle.com>
Cc: "David S . Miller" <davem@...emloft.net>, Paolo Abeni
 <pabeni@...hat.com>, netdev@...r.kernel.org, eric.dumazet@...il.com, Josef
 Bacik <josef@...icpanda.com>, Tetsuo Handa
 <penguin-kernel@...ove.SAKURA.ne.jp>
Subject: Re: [PATCH net] tcp: properly terminate timers for kernel sockets

On Fri, 22 Mar 2024 13:57:32 +0000 Eric Dumazet wrote:
> +	if (!sk->sk_net_refcnt)
> +		inet_csk_clear_xmit_timers_sync(sk);

The thought that we should clear or poison sk_net at this point
(whether sk->sk_net_refcnt or not) keeps coming back to me.
If we don't guarantee the pointer is valid - to make it easier
for syzbot to catch invalid accesses?