From d2722f8b87fb172ff2f31d3a2816b31d58678d40 Mon Sep 17 00:00:00 2001
From: Johannes Berg <johannes.berg@intel.com>
Date: Tue, 4 Mar 2014 11:43:28 +0100
Subject: [PATCH] mac80211: fix potential use-after-free
The bss struct might be freed in ieee80211_rx_bss_put(),
so we shouldn't use it afterwards.
Cc: stable@vger.kernel.org (3.10+)
Fixes: 817cee7675237 ("mac80211: track AP's beacon rate and give it to the driver")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---
net/mac80211/mlme.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 46b62bb3677c..423816f18b55 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -2780,8 +2780,8 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
channel);
if (bss) {
- ieee80211_rx_bss_put(local, bss);
sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
+ ieee80211_rx_bss_put(local, bss);
}
}
--
2.49.0