6LoWPAN: call dev_put() on error in lowpan_newlink()

We should release the dev_hold() on error before returning here.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 1 deletions

diff --git a/net/ieee802154/6lowpan.c b/net/ieee802154/6lowpan.c
index 5dc04890e0c5..f0d15365722a 100644
--- a/net/ieee802154/6lowpan.c
+++ b/net/ieee802154/6lowpan.c
@@ -793,8 +793,11 @@ static int lowpan_newlink(struct net *src_net, struct net_device *dev,
         mutex_init(&lowpan_dev_info(dev)->dev_list_mtx);
 
         entry = kzalloc(sizeof(struct lowpan_dev_record), GFP_KERNEL);
-        if (!entry)
+        if (!entry) {
+                dev_put(real_dev);
+                lowpan_dev_info(dev)->real_dev = NULL;
                 return -ENOMEM;
+        }
 
         entry->ldev = dev;