| From | Jiri Slaby <> | Subject | [PATCH 3.12 153/182] mac80211: fix potential use-after-free | Date | Tue, 13 May 2014 11:28:25 +0200 |
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From: Johannes Berg <johannes.berg@intel.com>
3.12-stable review patch. If anyone has any objections, please let me know.
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commit d2722f8b87fb172ff2f31d3a2816b31d58678d40 upstream.
The bss struct might be freed in ieee80211_rx_bss_put(), so we shouldn't use it afterwards.
Fixes: 817cee7675237 ("mac80211: track AP's beacon rate and give it to the driver") Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Jiri Slaby <jslaby@suse.cz> --- 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 8d7f4abe65ba..2af1c38374a4 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -2881,8 +2881,8 @@ 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); } } -- 1.9.3
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