| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.20 008/145] ieee802154: lowpan_header_create check must check daddr | Date | Mon, 7 Jan 2019 13:30:45 +0100 |
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4.20-stable review patch. If anyone has any objections, please let me know.
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From: Willem de Bruijn <willemb@google.com>
[ Upstream commit 40c3ff6d5e0809505a067dd423c110c5658c478c ]
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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- net/ieee802154/6lowpan/tx.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/net/ieee802154/6lowpan/tx.c +++ b/net/ieee802154/6lowpan/tx.c @@ -48,6 +48,9 @@ int lowpan_header_create(struct sk_buff 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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