In collect_md mode, if the tun dev is down, it still can call
__ip6_tnl_rcv to receive on packets, and the rx statistics increase
improperly.
Fixes: 8d79266bc48c ("ip6_tunnel: add collect_md mode to IPv6 tunnels")
Cc: Alexei Starovoitov <a...@fb.com>
Signed-off-by: Haishuang Yan <yanhaishu...@cmss.chinamobile.com>
---
net/ipv6/ip6_tunnel.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index 6400726..25961c7 100644
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -171,7 +171,7 @@ static struct net_device_stats *ip6_get_stats(struct
net_device *dev)
}
t = rcu_dereference(ip6n->collect_md_tun);
- if (t)
+ if (t && (t->dev->flags & IFF_UP))
return t;
t = rcu_dereference(ip6n->tnls_wc[0]);
--
1.8.3.1
