netdev - Re: [PATCH] atm/fore200e: Fix possible data race in fore200e

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Message-ID: <20250116165914.35f72b1a@kernel.org>
Date: Thu, 16 Jan 2025 16:59:14 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: Gui-Dong Han <2045gemini@...il.com>
Cc: 3chas3@...il.com, linux-atm-general@...ts.sourceforge.net,
 netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
 baijiaju1990@...il.com, stable@...r.kernel.org
Subject: Re: [PATCH] atm/fore200e: Fix possible data race in fore200e_open()

On Wed, 15 Jan 2025 13:10:06 +0000 Gui-Dong Han wrote:
> Protect access to fore200e->available_cell_rate with rate_mtx lock to
> prevent potential data race.
> 
> The field fore200e.available_cell_rate is generally protected by the lock
> fore200e.rate_mtx when accessed. In all other read and write cases, this
> field is consistently protected by the lock, except for this case and
> during initialization.

That's not sufficient in terms of analysis.

You need to be able to articulate what can go wrong.
-- 
pw-bot: reject