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-rw-r--r--net/tipc/eth_media.c25
1 files changed, 17 insertions, 8 deletions
diff --git a/net/tipc/eth_media.c b/net/tipc/eth_media.c
index 6230d16020c4..81253d0b24b9 100644
--- a/net/tipc/eth_media.c
+++ b/net/tipc/eth_media.c
@@ -72,17 +72,26 @@ static int send_msg(struct sk_buff *buf, struct tipc_bearer *tb_ptr,
{
struct sk_buff *clone;
struct net_device *dev;
+ int delta;
clone = skb_clone(buf, GFP_ATOMIC);
- if (clone) {
- skb_reset_network_header(clone);
- dev = ((struct eth_bearer *)(tb_ptr->usr_handle))->dev;
- clone->dev = dev;
- dev_hard_header(clone, dev, ETH_P_TIPC,
- &dest->dev_addr.eth_addr,
- dev->dev_addr, clone->len);
- dev_queue_xmit(clone);
+ if (!clone)
+ return 0;
+
+ dev = ((struct eth_bearer *)(tb_ptr->usr_handle))->dev;
+ delta = dev->hard_header_len - skb_headroom(buf);
+
+ if ((delta > 0) &&
+ pskb_expand_head(clone, SKB_DATA_ALIGN(delta), 0, GFP_ATOMIC)) {
+ kfree_skb(clone);
+ return 0;
}
+
+ skb_reset_network_header(clone);
+ clone->dev = dev;
+ dev_hard_header(clone, dev, ETH_P_TIPC, &dest->dev_addr.eth_addr,
+ dev->dev_addr, clone->len);
+ dev_queue_xmit(clone);
return 0;
}