This is a note to let you know that I've just added the patch titled
mwifiex: MAC randomization should not be persistent
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mwifiex-mac-randomization-should-not-be-persistent.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 7e2f18f06408ff56d7f75e68de8064777137b319 Mon Sep 17 00:00:00 2001
From: Brian Norris <briannorris@xxxxxxxxxxxx>
Date: Wed, 5 Apr 2017 15:26:40 -0700
Subject: mwifiex: MAC randomization should not be persistent
From: Brian Norris <briannorris@xxxxxxxxxxxx>
commit 7e2f18f06408ff56d7f75e68de8064777137b319 upstream.
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")
Signed-off-by: Brian Norris <briannorris@xxxxxxxxxxxx>
Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/wireless/marvell/mwifiex/cfg80211.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/net/wireless/marvell/mwifiex/cfg80211.c
+++ b/drivers/net/wireless/marvell/mwifiex/cfg80211.c
@@ -2512,9 +2512,11 @@ mwifiex_cfg80211_scan(struct wiphy *wiph
priv->random_mac[i] |= get_random_int() &
~(request->mac_addr_mask[i]);
}
+ ether_addr_copy(user_scan_cfg->random_mac, priv->random_mac);
+ } else {
+ eth_zero_addr(priv->random_mac);
}
- ether_addr_copy(user_scan_cfg->random_mac, priv->random_mac);
user_scan_cfg->num_ssids = request->n_ssids;
user_scan_cfg->ssid_list = request->ssids;
Patches currently in stable-queue which might be from briannorris@xxxxxxxxxxxx are
queue-4.9/mwifiex-mac-randomization-should-not-be-persistent.patch
queue-4.9/mwifiex-pcie-fix-cmd_buf-use-after-free-in-remove-reset.patch