af_packet: Don't send zero-byte data in packet_sendmsg_spkt().

[platform/kernel/linux-rpi.git] / net / packet / af_packet.c

diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 6080c0d..640d94e 100644 (file)
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -2033,7 +2033,7 @@ retry:
                goto retry;
        }
 
-       if (!dev_validate_header(dev, skb->data, len)) {
+       if (!dev_validate_header(dev, skb->data, len) || !skb->len) {
                err = -EINVAL;
                goto out_unlock;
        }