mac802154: fakelb: Fix potential NULL pointer dereference.

fakelb_hw_deliver creates a copy of the skb's header which can
potentially return NULL so we now check for this before actually
delivering to the 802.15.4 MAC layer.

Signed-off-by: Martin Townsend <martin.townsend@xsilon.com>
Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/net/ieee802154/fakelb.c b/drivers/net/ieee802154/fakelb.c
index 91bbf030a443..230f7da02165 100644
--- a/drivers/net/ieee802154/fakelb.c
+++ b/drivers/net/ieee802154/fakelb.c
@@ -69,7 +69,8 @@ fakelb_hw_deliver(struct fakelb_dev_priv *priv, struct sk_buff *skb)
         spin_lock(&priv->lock);
         if (priv->working) {
                 newskb = pskb_copy(skb, GFP_ATOMIC);
-                ieee802154_rx_irqsafe(priv->hw, newskb, 0xcc);
+                if (newskb)
+                        ieee802154_rx_irqsafe(priv->hw, newskb, 0xcc);
         }
         spin_unlock(&priv->lock);
 }