diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 2c218a0808b4d5fa0a09e90ae8edac6c2b27affe..8bd248a64879bcac5f91a53659abcb281ada594a 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -738,6 +738,8 @@ int pskb_expand_head(struct sk_buff *skb, int nhead, int ntail,
 #endif
 	long off;
 
+	BUG_ON(nhead < 0);
+
 	if (skb_shared(skb))
 		BUG();