diff options
| author | Taehee Yoo <ap420073@gmail.com> | 2022-07-17 16:09:07 +0000 |
|---|---|---|
| committer | Paolo Abeni <pabeni@redhat.com> | 2022-07-19 12:37:02 +0200 |
| commit | 40185f359fbabaa61da754cc29d12f3a41e0a987 (patch) | |
| tree | 920ca83069e757cee32832c996ed9c9da43d6e54 | |
| parent | 627f16931bf3cb20d50274d9341380ac2c3035fd (diff) | |
| download | linux-40185f359fbabaa61da754cc29d12f3a41e0a987.tar.gz | |
amt: drop unexpected advertisement message
AMT gateway interface should not receive unexpected advertisement messages.
In order to drop these packets, it should check nonce and 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>
| -rw-r--r-- | drivers/net/amt.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/net/amt.c b/drivers/net/amt.c index e0743c20b78067..2d007c5c546362 100644 --- a/drivers/net/amt.c +++ b/drivers/net/amt.c @@ -2260,6 +2260,10 @@ static bool amt_advertisement_handler(struct amt_dev *amt, struct sk_buff *skb) ipv4_is_zeronet(amta->ip4)) return true; + if (amt->status != AMT_STATUS_SENT_DISCOVERY || + amt->nonce != amta->nonce) + return true; + amt->remote_ip = amta->ip4; netdev_dbg(amt->dev, "advertised remote ip = %pI4\n", &amt->remote_ip); mod_delayed_work(amt_wq, &amt->req_wq, 0); @@ -2975,6 +2979,7 @@ static int amt_dev_open(struct net_device *dev) amt->req_cnt = 0; amt->remote_ip = 0; + amt->nonce = 0; get_random_bytes(&amt->key, sizeof(siphash_key_t)); amt->status = AMT_STATUS_INIT; |