1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/net/loopback.c b/drivers/net/loopback.c
index e2a06fd996d5..4a075babe193 100644
--- a/drivers/net/loopback.c
+++ b/drivers/net/loopback.c
@@ -197,6 +197,7 @@ static __net_init int loopback_net_init(struct net *net)
         if (err)
                 goto out_free_netdev;
 
+        BUG_ON(dev->ifindex != LOOPBACK_IFINDEX);
         net->loopback_dev = dev;
         return 0;