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mac802154: fakelb: Fix potential NULL pointer dereference.

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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>
This commit is contained in:
Martin Townsend 2015-05-17 21:44:54 +02:00 committed by Marcel Holtmann
parent 0e66545701
commit cb97d9a3eb
1 changed files with 2 additions and 1 deletions
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3
drivers/net/ieee802154/fakelb.c
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@ -69,7 +69,8 @@ fakelb_hw_deliver(struct fakelb_dev_priv *priv, struct sk_buff *skb)
spin_lock(&priv->lock); spin_lock(&priv->lock);
if (priv->working) { if (priv->working) {
newskb = pskb_copy(skb, GFP_ATOMIC); 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); spin_unlock(&priv->lock);
} }