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6lowpan: Make a copy of skb's delivered to 6lowpan

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Since lowpan_process_data() modifies the skb (by calling skb_pull()), we
need our own copy so that it doesn't affect the data received by other
protcols (in this case, af_ieee802154).

Signed-off-by: Alan Ott <alan@signal11.us>
Signed-off-by: David S. Miller <davem@tempietto.lan>
This commit is contained in:
Alan Ott 2012-09-01 05:57:06 +00:00 committed by David S. Miller
parent 1bed966cc3
commit a437d2744b
1 changed files with 8 additions and 1 deletions
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9
net/ieee802154/6lowpan.c
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@ -1133,6 +1133,8 @@ static int lowpan_validate(struct nlattr *tb[], struct nlattr *data[])
static int lowpan_rcv(struct sk_buff *skb, struct net_device *dev,
struct packet_type *pt, struct net_device *orig_dev)
{
struct sk_buff *local_skb;
if (!netif_running(dev))
goto drop;
@ -1144,7 +1146,12 @@ static int lowpan_rcv(struct sk_buff *skb, struct net_device *dev,
case LOWPAN_DISPATCH_IPHC: /* ipv6 datagram */
case LOWPAN_DISPATCH_FRAG1: /* first fragment header */
case LOWPAN_DISPATCH_FRAGN: /* next fragments headers */
lowpan_process_data(skb);
local_skb = skb_clone(skb, GFP_ATOMIC);
if (!local_skb)
goto drop;
lowpan_process_data(local_skb);
kfree_skb(skb);
break;
default:
break;