From mboxrd@z Thu Jan 1 00:00:00 1970 From: Steffen Klassert Subject: [PATCH net v2] ip_tunnel: Initialize the fallback device properly Date: Mon, 19 May 2014 11:36:56 +0200 Message-ID: <20140519093656.GE32371@secunet.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Cc: Eric Dumazet , Pravin B Shelar , To: David Miller Return-path: Received: from a.mx.secunet.com ([195.81.216.161]:39753 "EHLO a.mx.secunet.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750803AbaESJhD (ORCPT ); Mon, 19 May 2014 05:37:03 -0400 Content-Disposition: inline Sender: netdev-owner@vger.kernel.org List-ID: We need to initialize the fallback device to have a correct mtu set on this device. Otherwise the mtu is set to null and the device is unusable. Fixes: fd58156e456d ("IPIP: Use ip-tunneling code.") Cc: Pravin B Shelar Signed-off-by: Steffen Klassert --- v2: Add a reference to the commit that added the bug. No code changes since v1. net/ipv4/ip_tunnel.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/ipv4/ip_tunnel.c b/net/ipv4/ip_tunnel.c index 49721d7..2acc233 100644 --- a/net/ipv4/ip_tunnel.c +++ b/net/ipv4/ip_tunnel.c @@ -883,6 +883,7 @@ int ip_tunnel_init_net(struct net *net, int ip_tnl_net_id, */ if (!IS_ERR(itn->fb_tunnel_dev)) { itn->fb_tunnel_dev->features |= NETIF_F_NETNS_LOCAL; + itn->fb_tunnel_dev->mtu = ip_tunnel_bind_dev(itn->fb_tunnel_dev); ip_tunnel_add(itn, netdev_priv(itn->fb_tunnel_dev)); } rtnl_unlock(); -- 1.7.9.5