In the original code, if rtnl_create_link() returned an ERR_PTR then that
would get passed to rtnl_configure_link() which dereferences it.
Signed-off-by: Dan Carpenter <error27@xxxxxxxxx>
---
Found by a static checker, and compile tested only. :/
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 4568120..fe776c9 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -1270,10 +1270,11 @@ replay:
err = ops->newlink(net, dev, tb, data);
else
err = register_netdevice(dev);
- if (err < 0 && !IS_ERR(dev)) {
+
+ if (err < 0 && !IS_ERR(dev))
free_netdev(dev);
+ if (err < 0)
goto out;
- }
err = rtnl_configure_link(dev, ifm);
if (err < 0)
--
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