linux-kernel - RE: [EXT] [PATCH] mwifiex: Fix memory corruption in dump

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Message-ID: <VI1PR04MB43668507151CCB7810F5EEEF8FBA0@VI1PR04MB4366.eurprd04.prod.outlook.com>
Date:   Sat, 16 May 2020 08:07:16 +0000
From:   Ganapathi Bhat <ganapathi.bhat@....com>
To:     Pali Rohár <pali@...nel.org>,
        Amitkumar Karwar <amitkarwar@...il.com>,
        Xinming Hu <huxinming820@...il.com>,
        Kalle Valo <kvalo@...eaurora.org>,
        "David S. Miller" <davem@...emloft.net>,
        Cathy Luo <cluo@...vell.com>,
        Avinash Patil <patila@...vell.com>,
        Marek Behún <marek.behun@....cz>
CC:     "linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [EXT] [PATCH] mwifiex: Fix memory corruption in dump_station

Hi Pali,

> The mwifiex_cfg80211_dump_station() uses static variable for iterating over
> a linked list of all associated stations (when the driver is in UAP role). This has
> a race condition if .dump_station is called in parallel for multiple interfaces.
> This corruption can be triggered by registering multiple SSIDs and calling, in
> parallel for multiple interfaces
>     iw dev <iface> station dump

Thanks for this change.
 
Acked-by: Ganapathi Bhat <ganapathi.bhat@....com>

Regards,
Ganapathi