[NET]: Fix skb_copy_expand offset calculation.

c1c555ef · Patrick McHardy · Linus Torvalds · ad9b568a · c1c555ef
Commit c1c555ef authored Nov 05, 2003 by Patrick McHardy Committed by Linus Torvalds Nov 05, 2003
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net/core/skbuff.c net/core/skbuff.c +3 -3

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--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -595,10 +595,10 @@ struct sk_buff *skb_copy_expand(const struct sk_buff *skb,
 	head_copy_len = skb_headroom(skb);
 	head_copy_off = 0;
-	if (newheadroom < head_copy_len) {
+	if (newheadroom <= head_copy_len)
-		head_copy_off = head_copy_len - newheadroom;
 		head_copy_len = newheadroom;
-	}
+	else
+		head_copy_off = newheadroom - head_copy_len;
 	/* Copy the linear header and data. */
 	if (skb_copy_bits(skb, -head_copy_len, n->head + head_copy_off,