netdev - Re: [PATCH net] net: Fix data race around dev->flags in netif_is_bond

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Message-ID: <20240729074132.6edec347@kernel.org>
Date: Mon, 29 Jul 2024 07:41:32 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Jeongjun Park <aha310510@...il.com>
Cc: davem@...emloft.net, edumazet@...gle.com, pabeni@...hat.com,
 razor@...ckwall.org, agospoda@...hat.com,
 syzbot+113b65786d8662e21ff7@...kaller.appspotmail.com,
 linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
 syzkaller-bugs@...glegroups.com
Subject: Re: [PATCH net] net: Fix data race around dev->flags in
 netif_is_bond_master

On Sun, 28 Jul 2024 19:54:29 +0900 Jeongjun Park wrote:
> According to KCSAN report, there is a read/write race between 
> __dev_change_flags and netif_is_bond_master for dev->flags. Therefore, 
> should change to use READ_ONCE() when reading dev->flags.

That will certainly silence the warning, but doesn't prove the change
is correct.
-- 
pw-bot: cr