Commit e882827d authored Jul 17, 2022 by Taehee Yoo Committed by Paolo Abeni Jul 19, 2022

amt: drop unexpected multicast data



AMT gateway interface should not receive unexpected multicast data.
Multicast data message type should be received after sending an update
message, which means all establishment between gateway and relay is
finished.
So, amt_multicast_data_handler() checks amt->status.

Fixes: cbc21dc1 ("amt: add data plane of amt interface")
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

parent 239d8866

drivers/net/amt.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -2282,6 +2282,9 @@ static bool amt_multicast_data_handler(struct amt_dev amt, struct sk_buff skb)
		struct ethhdr *eth;
		struct iphdr *iph;

		if (READ_ONCE(amt->status) != AMT_STATUS_SENT_UPDATE)
		return true;

		hdr_size = sizeof(*amtmd) + sizeof(struct udphdr);
		if (!pskb_may_pull(skb, hdr_size))
		return true;