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    Subject[PATCH 3.13 079/151] mac80211: fix potential use-after-free
    Date
    3.13.11.1 -stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Johannes Berg <johannes.berg@intel.com>

    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: Kamal Mostafa <kamal@canonical.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 72ad37d..90ee798 100644
    --- a/net/mac80211/mlme.c
    +++ b/net/mac80211/mlme.c
    @@ -2691,8 +2691,8 @@ 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);
    }
    }

    --
    1.9.1


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