[NET]: Fix csum_start update in pskb_expand_head

I got confused by the dual nature of the off variable in the function pskb_expand_head. The csum_start offset should use nhead instead of off which can change depending on whether we are using offsets or pointers. Signed-off-by: Herbert Xu <[email protected]> Signed-off-by: David S. Miller <[email protected]>
iegor · Oct 15, 2007 · 172a863 · 172a863
1 parent a9d4119
commit 172a863
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
@@ -682,7 +682,7 @@ int pskb_expand_head(struct sk_buff *skb, int nhead, int ntail,
 	skb->transport_header += off;
 	skb->network_header   += off;
 	skb->mac_header	      += off;
-	skb->csum_start       += off;
+	skb->csum_start       += nhead;
 	skb->cloned   = 0;
 	skb->hdr_len  = 0;
 	skb->nohdr    = 0;