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

From: Kalle Valo
Date: Thu Apr 06 2017 - 00:02:43 EST


Brian Norris <briannorris@xxxxxxxxxxxx> 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@xxxxxxxxxxxx>
> ---
> Should this be tagged for -stable?

IMHO yes.

--
Kalle Valo