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@xxxxxxxxxxxx>
---
net/mac80211/rx.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index d2a00f2..1ed32b4 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -2468,7 +2468,11 @@ ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx)
if (!ifmsh->mshcfg.dot11MeshForwarding)
goto out;
- fwd_skb = skb_copy(skb, GFP_ATOMIC);
+ if (skb_headroom(skb) >= local->tx_headroom)
+ fwd_skb = skb_copy(skb, GFP_ATOMIC);
+ else
+ 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);
--
2.7.4
