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? */