1 files changed, 2 insertions, 3 deletions

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 142257307fa2..7c6a34e21eee 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -644,11 +644,10 @@ int pskb_expand_head(struct sk_buff *skb, int nhead, int ntail,
 
         /* Copy only real data... and, alas, header. This should be
          * optimized for the cases when header is void. */
-        memcpy(data + nhead, skb->head,
 #ifdef NET_SKBUFF_DATA_USES_OFFSET
-                skb->tail);
+        memcpy(data + nhead, skb->head, skb->tail);
 #else
-                skb->tail - skb->head);
+        memcpy(data + nhead, skb->head, skb->tail - skb->head);
 #endif
         memcpy(data + size, skb_end_pointer(skb),
                sizeof(struct skb_shared_info));