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    Subject[PATCH 3.10 17/85] mac80211: clear sequence/fragment number in QoS-null frames
    Date
    3.10-stable review patch.  If anyone has any objections, please let me know.

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

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

    commit 864a6040f395464003af8dd0d8ca86fed19866d4 upstream.

    Avoid leaking data by sending uninitialized memory and setting an
    invalid (non-zero) fragment number (the sequence number is ignored
    anyway) by setting the seq_ctrl field to zero.

    Fixes: 3f52b7e328c5 ("mac80211: mesh power save basics")
    Fixes: ce662b44ce22 ("mac80211: send (QoS) Null if no buffered frames")
    Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
    Signed-off-by: Johannes Berg <johannes.berg@intel.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    net/mac80211/mesh_ps.c | 1 +
    net/mac80211/sta_info.c | 1 +
    2 files changed, 2 insertions(+)

    --- a/net/mac80211/mesh_ps.c
    +++ b/net/mac80211/mesh_ps.c
    @@ -36,6 +36,7 @@ static struct sk_buff *mps_qos_null_get(
    sdata->vif.addr);
    nullfunc->frame_control = fc;
    nullfunc->duration_id = 0;
    + nullfunc->seq_ctrl = 0;
    /* no address resolution for this frame -> set addr 1 immediately */
    memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN);
    memset(skb_put(skb, 2), 0, 2); /* append QoS control field */
    --- a/net/mac80211/sta_info.c
    +++ b/net/mac80211/sta_info.c
    @@ -1114,6 +1114,7 @@ static void ieee80211_send_null_response
    memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN);
    memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
    memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN);
    + nullfunc->seq_ctrl = 0;

    skb->priority = tid;
    skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]);



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