netdev - Re: [PATCH] mwifiex: MAC randomization should not be persistent

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Message-ID: <87inmifak8.fsf@kamboji.qca.qualcomm.com>
Date:   Thu, 06 Apr 2017 07:02:15 +0300
From:   Kalle Valo <kvalo@...eaurora.org>
To:     Brian Norris <briannorris@...omium.org>
Cc:     Nishant Sarmukadam <nishants@...vell.com>,
        Ganapathi Bhat <gbhat@...vell.com>,
        Xinming Hu <huxm@...vell.com>, <linux-kernel@...r.kernel.org>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        netdev@...r.kernel.org, linux-wireless@...r.kernel.org
Subject: Re: [PATCH] mwifiex: MAC randomization should not be persistent

Brian Norris <briannorris@...omium.org> writes:

> nl80211 provides the NL80211_SCAN_FLAG_RANDOM_ADDR for every scan
> request that should be randomized; the absence of such a flag means we
> should not randomize. However, mwifiex was stashing the latest
> randomization request and *always* using it for future scans, even those
> that didn't set the flag.
>
> Let's zero out the randomization info whenever we get a scan request
> without NL80211_SCAN_FLAG_RANDOM_ADDR. I'd prefer to remove
> priv->random_mac entirely (and plumb the randomization MAC properly
> through the call sequence), but the spaghetti is a little difficult to
> unravel here for me.
>
> Fixes: c2a8f0ff9c6c ("mwifiex: support random MAC address for scanning")

So the first release with this was v4.9.

> Signed-off-by: Brian Norris <briannorris@...omium.org>
> ---
> Should this be tagged for -stable?

IMHO yes.

-- 
Kalle Valo