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-rw-r--r--net/phonet/af_phonet.c4
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;
}