blob: 5b2537127f63f4519b925b1f1de3e1d03fea3e1b (
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--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -1850,12 +1850,15 @@ static inline int skb_clone_writable(con
static inline int __skb_cow(struct sk_buff *skb, unsigned int headroom,
int cloned)
{
+ unsigned int alloc_headroom = headroom;
int delta = 0;
if (headroom < NET_SKB_PAD)
- headroom = NET_SKB_PAD;
- if (headroom > skb_headroom(skb))
- delta = headroom - skb_headroom(skb);
+ alloc_headroom = NET_SKB_PAD;
+ if (headroom > skb_headroom(skb) ||
+ (cloned && alloc_headroom > skb_headroom(skb))) {
+ delta = alloc_headroom - skb_headroom(skb);
+ }
if (delta || cloned)
return pskb_expand_head(skb, ALIGN(delta, NET_SKB_PAD), 0,
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