From: Martin Townsend <mtownsend1973@gmail.com>
Date: Sun, 17 May 2015 19:44:54 +0000 (+0200)
Subject: mac802154: fakelb: Fix potential NULL pointer dereference.
X-Git-Tag: firefly_0821_release~176^2~1587^2~183^2~44
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=cb97d9a3eb0be1e33db5535955e6629e800f3f0e;p=firefly-linux-kernel-4.4.55.git

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>
---

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);
 }