From d2722f8b87fb172ff2f31d3a2816b31d58678d40 Mon Sep 17 00:00:00 2001 From: Johannes Berg 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 --- 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); } }