From ff6ab32bd4e073976e4d8797b4d514a172cfe6cb Mon Sep 17 00:00:00 2001 From: Stephen Suryaputra Date: Mon, 6 May 2019 15:00:01 -0400 Subject: [PATCH] vrf: sit mtu should not be updated when vrf netdev is the link VRF netdev mtu isn't typically set and have an mtu of 65536. When the link of a tunnel is set, the tunnel mtu is changed from 1480 to the link mtu minus tunnel header. In the case of VRF netdev is the link, then the tunnel mtu becomes 65516. So, fix it by not setting the tunnel mtu in this case. Signed-off-by: Stephen Suryaputra Reviewed-by: David Ahern Signed-off-by: David S. Miller --- net/ipv6/sit.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c index b2109b74857d..971d60bf9640 100644 --- a/net/ipv6/sit.c +++ b/net/ipv6/sit.c @@ -1084,7 +1084,7 @@ static void ipip6_tunnel_bind_dev(struct net_device *dev) if (!tdev && tunnel->parms.link) tdev = __dev_get_by_index(tunnel->net, tunnel->parms.link); - if (tdev) { + if (tdev && !netif_is_l3_master(tdev)) { int t_hlen = tunnel->hlen + sizeof(struct iphdr); dev->hard_header_len = tdev->hard_header_len + sizeof(struct iphdr); -- 2.45.2