1 files changed, 2 insertions, 2 deletions

diff --git a/net/phonet/af_phonet.c b/net/phonet/af_phonet.c
index f400ff168904..62af1d8a8dd2 100644
--- a/net/phonet/af_phonet.c
+++ b/net/phonet/af_phonet.c
@@ -148,8 +148,8 @@ static int pn_send(struct sk_buff *skb, struct net_device *dev,
         struct phonethdr *ph;
         int err;
 
-        if (skb->len + 2 > 0xffff) {
-                /* Phonet length field would overflow */
+        if (skb->len + 2 > 0xffff /* Phonet length field limit */ ||
+            skb->len + sizeof(struct phonethdr) > dev->mtu) {
                 err = -EMSGSIZE;
                 goto drop;
         }