batman: fix a bogus warning from batadv_is_on_batman_iface()
authorCong Wang <cwang@twopensource.com>
Thu, 22 May 2014 18:57:17 +0000 (11:57 -0700)
committerDavid S. Miller <davem@davemloft.net>
Thu, 22 May 2014 21:23:00 +0000 (17:23 -0400)
batman tries to search dev->iflink to check if it's a batman interface,
but ->iflink could be 0, which is not a valid ifindex. It should just
avoid iflink == 0 case.

Reported-by: Jet Chen <jet.chen@intel.com>
Tested-by: Jet Chen <jet.chen@intel.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Cc: Antonio Quartulli <antonio@open-mesh.com>
Cc: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Cong Wang <cwang@twopensource.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/batman-adv/hard-interface.c

index b851cc5..fbda6b5 100644 (file)
@@ -83,7 +83,7 @@ static bool batadv_is_on_batman_iface(const struct net_device *net_dev)
                return true;
 
        /* no more parents..stop recursion */
-       if (net_dev->iflink == net_dev->ifindex)
+       if (net_dev->iflink == 0 || net_dev->iflink == net_dev->ifindex)
                return false;
 
        /* recurse over the parent device */