linux-kernel - Re: [PATCH] mwifiex: duplicate static structs used in driver instances

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Message-ID: <ZrYOoTRWlKTL_e3o@gaggiata.pivistrello.it>
Date: Fri, 9 Aug 2024 14:42:09 +0200
From: Francesco Dolcini <francesco@...cini.it>
To: Sascha Hauer <s.hauer@...gutronix.de>
Cc: Brian Norris <briannorris@...omium.org>,
	Francesco Dolcini <francesco@...cini.it>,
	Kalle Valo <kvalo@...nel.org>,
	Yogesh Ashok Powar <yogeshp@...vell.com>,
	Bing Zhao <bzhao@...vell.com>,
	"John W. Linville" <linville@...driver.com>,
	Amitkumar Karwar <akarwar@...vell.com>,
	Avinash Patil <patila@...vell.com>,
	Kiran Divekar <dkiran@...vell.com>, linux-wireless@...r.kernel.org,
	linux-kernel@...r.kernel.org, kernel@...gutronix.de,
	stable@...r.kernel.org
Subject: Re: [PATCH] mwifiex: duplicate static structs used in driver
 instances

On Fri, Aug 09, 2024 at 10:11:33AM +0200, Sascha Hauer wrote:
> mwifiex_band_2ghz and mwifiex_band_5ghz are statically allocated, but
> used and modified in driver instances. Duplicate them before using
> them in driver instances so that different driver instances do not
> influence each other.
> 
> This was observed on a board which has one PCIe and one SDIO mwifiex
> adapter. It blew up in mwifiex_setup_ht_caps(). This was called with
> the statically allocated struct which is modified in this function.
> 
> Cc: stable@...r.kernel.org
> Fixes: d6bffe8bb520 ("mwifiex: support for creation of AP interface")
> Signed-off-by: Sascha Hauer <s.hauer@...gutronix.de>

Reviewed-by: Francesco Dolcini <francesco.dolcini@...adex.com>