diff --git a/net/hsr/hsr_forward.c b/net/hsr/hsr_forward.c
index 0c115d8de..a58c0be64 100755
--- a/net/hsr/hsr_forward.c
+++ b/net/hsr/hsr_forward.c
@@ -525,6 +525,8 @@ static int fill_frame_info(struct hsr_frame_info *frame,
 		frame->is_vlan = true;
 
 	if (frame->is_vlan) {
+		if (skb->mac_len < offsetofend(struct hsr_vlan_ethhdr, vlanhdr))
+			return -EINVAL;
 		vlan_hdr = (struct hsr_vlan_ethhdr *)ethhdr;
 		proto = vlan_hdr->vlanhdr.h_vlan_encapsulated_proto;
 		/* FIXME: */