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ieee802154: lowpan_header_create check must check daddr

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Packet sockets may call dev_header_parse with NULL daddr. Make
lowpan_header_ops.create fail.

Fixes: 87a93e4ece ("ieee802154: change needed headroom/tailroom")
Signed-off-by: Willem de Bruijn <willemb@google.com>
Acked-by: Alexander Aring <aring@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Willem de Bruijn 2018-12-23 12:52:18 -05:00 committed by David S. Miller
parent 7bdca378b2
commit 40c3ff6d5e
1 changed files with 3 additions and 0 deletions
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3
net/ieee802154/6lowpan/tx.c
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@ -48,6 +48,9 @@ int lowpan_header_create(struct sk_buff *skb, struct net_device *ldev,
const struct ipv6hdr *hdr = ipv6_hdr(skb);
struct neighbour *n;
if (!daddr)
return -EINVAL;
/* TODO:
* if this package isn't ipv6 one, where should it be routed?
*/