From: Taehee Yoo ap420073@gmail.com
[ Upstream commit e882827d5b8942a27b4d28548aa27562a3a7e94c ]
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: cbc21dc1cfe9 ("amt: add data plane of amt interface") Signed-off-by: Taehee Yoo ap420073@gmail.com Signed-off-by: Paolo Abeni pabeni@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/amt.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/net/amt.c b/drivers/net/amt.c index 5c65908abd5a..4277924ab3b9 100644 --- a/drivers/net/amt.c +++ b/drivers/net/amt.c @@ -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;