mac80211: Ensure enough headroom when forwarding mesh pkt

When a buffer is duplicated during MESH packet forwarding,
this patch ensures that the new buffer has enough headroom.

Signed-off-by: Cedric Izoard <cedric.izoard@ceva-dsp.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index eeab7250f4b978bd2af2b320ae8f430ab00cc81d..3e289a64ed4317a8a495cb7cac8197fb9ce10c3e 100644 (file)
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -2472,7 +2472,7 @@ ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx)
        if (!ifmsh->mshcfg.dot11MeshForwarding)
                goto out;
 
-       fwd_skb = skb_copy(skb, GFP_ATOMIC);
+       fwd_skb = skb_copy_expand(skb, local->tx_headroom, 0, GFP_ATOMIC);
        if (!fwd_skb) {
                net_info_ratelimited("%s: failed to clone mesh frame\n",
                                    sdata->name);