net: hisilicon: remove unexpected free_netdev

The net device ndev is freed via free_netdev when failing to register
the device. The control flow then jumps to the error handling code
block. ndev is used and freed again. Resulting in a use-after-free bug.

Signed-off-by: Pan Bian <bianpan2016@163.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/hisilicon/hip04_eth.c b/drivers/net/ethernet/hisilicon/hip04_eth.c
index be268dcde8fa2a5db3fd392237d583a4c5cc0d5e..f9a4e76c5a8b73799c61cb7d3a260cc50f9287ee 100644 (file)
--- a/drivers/net/ethernet/hisilicon/hip04_eth.c
+++ b/drivers/net/ethernet/hisilicon/hip04_eth.c
@@ -915,10 +915,8 @@ static int hip04_mac_probe(struct platform_device *pdev)
        }
 
        ret = register_netdev(ndev);
-       if (ret) {
-               free_netdev(ndev);
+       if (ret)
                goto alloc_fail;
-       }
 
        return 0;