1 files changed, 4 insertions, 0 deletions

diff --git a/net/phonet/af_phonet.c b/net/phonet/af_phonet.c
index 10d42f3220ab..f925753668a7 100644
--- a/net/phonet/af_phonet.c
+++ b/net/phonet/af_phonet.c
@@ -377,6 +377,10 @@ static int phonet_rcv(struct sk_buff *skb, struct net_device *dev,
         struct sockaddr_pn sa;
         u16 len;
 
+        skb = skb_share_check(skb, GFP_ATOMIC);
+        if (!skb)
+                return NET_RX_DROP;
+
         /* check we have at least a full Phonet header */
         if (!pskb_pull(skb, sizeof(struct phonethdr)))
                 goto out;