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>
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 46b62bb..423816f 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -2780,8 +2780,8 @@
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);
}
}