skb->end = skb->tail + size;
kmemcheck_annotate_bitfield(skb, flags1);
kmemcheck_annotate_bitfield(skb, flags2);
+#ifdef NET_SKBUFF_DATA_USES_OFFSET
+ skb->mac_header = ~0U;
+#endif
+
/* make sure we initialize shinfo sequentially */
shinfo = skb_shinfo(skb);
atomic_set(&shinfo->dataref, 1);
/* {transport,network,mac}_header are relative to skb->head */
new->transport_header += offset;
new->network_header += offset;
- new->mac_header += offset;
+ if (skb_mac_header_was_set(new))
+ new->mac_header += offset;
#endif
skb_shinfo(new)->gso_size = skb_shinfo(old)->gso_size;
skb_shinfo(new)->gso_segs = skb_shinfo(old)->gso_segs;
skb->tail += off;
skb->transport_header += off;
skb->network_header += off;
- skb->mac_header += off;
+ if (skb_mac_header_was_set(skb))
+ skb->mac_header += off;
skb->csum_start += nhead;
skb->cloned = 0;
skb->hdr_len = 0;
#ifdef NET_SKBUFF_DATA_USES_OFFSET
n->transport_header += off;
n->network_header += off;
- n->mac_header += off;
+ if (skb_mac_header_was_set(skb))
+ n->mac_header += off;
#endif
return n;