path: root/net
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authorWillem de Bruijn <willemb@google.com>2018-12-23 12:52:18 -0500
committerDavid S. Miller <davem@davemloft.net>2018-12-24 14:31:22 -0800
commit40c3ff6d5e0809505a067dd423c110c5658c478c (patch)
treeab4762f934800ee83e52461a8f5b490257b1eced /net
parent7bdca378b2301b1fc6a95c60d6d428408ae4e39e (diff)
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: 87a93e4eceb4 ("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>
Diffstat (limited to 'net')
1 files changed, 3 insertions, 0 deletions
diff --git a/net/ieee802154/6lowpan/tx.c b/net/ieee802154/6lowpan/tx.c
index ca53efa17be1..8bec827081cd 100644
--- a/net/ieee802154/6lowpan/tx.c
+++ b/net/ieee802154/6lowpan/tx.c
@@ -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?

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