path: root/net/ipv4/ip_tunnel.c
diff options
authorHaishuang Yan <yanhaishuang@cmss.chinamobile.com>2017-09-12 17:47:56 +0800
committerDavid S. Miller <davem@davemloft.net>2017-09-12 20:45:31 -0700
commit833a8b405465e935a1ff7ab086b54a3ef90437ca (patch)
tree5d0c8d0c261e27cd3a84c924d4b4822840537f9b /net/ipv4/ip_tunnel.c
parentmlxsw: spectrum: Prevent mirred-related crash on removal (diff)
ip_tunnel: fix ip tunnel lookup in collect_md mode
In collect_md mode, if the tun dev is down, it still can call ip_tunnel_rcv to receive on packets, and the rx statistics increase improperly. When the md tunnel is down, it's not neccessary to increase RX drops for the tunnel device, packets would be recieved on fallback tunnel, and the RX drops on fallback device will be increased as expected. Fixes: 2e15ea390e6f ("ip_gre: Add support to collect tunnel metadata.") Cc: Pravin B Shelar <pshelar@nicira.com> Signed-off-by: Haishuang Yan <yanhaishuang@cmss.chinamobile.com> Acked-by: Pravin B Shelar <pshelar@ovn.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/ip_tunnel.c')
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/ip_tunnel.c b/net/ipv4/ip_tunnel.c
index e1856bfa753d..e9805ad664ac 100644
--- a/net/ipv4/ip_tunnel.c
+++ b/net/ipv4/ip_tunnel.c
@@ -176,7 +176,7 @@ skip_key_lookup:
return cand;
t = rcu_dereference(itn->collect_md_tun);
- if (t)
+ if (t && t->dev->flags & IFF_UP)
return t;
if (itn->fb_tunnel_dev && itn->fb_tunnel_dev->flags & IFF_UP)