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ieee802154: lowpan_header_create check must check daddr
Packet sockets may call dev_header_parse with NULL daddr. Make lowpan_header_ops.create fail. Fixes: 87a93e4 ("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>
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