rtnetlink: fix a memory leak when ->newlink fails
It is possible that ->newlink() fails before registering the device, in this case we should just free it, it's safe to call free_netdev(). Fixes: commit 0e0eee24 (net: correct error path in rtnl_newlink()) Cc: David S. Miller <davem@davemloft.net> Cc: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Cong Wang <cwang@twopensource.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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