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net: hisilicon: remove unexpected free_netdev

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[ Upstream commit c758940158bf29fe14e9d0f89d5848f227b48134 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Pan Bian 2018-11-28 15:30:24 +08:00 • committed by Greg Kroah-Hartman
parent 553c8675f5
commit 573f19f151
1 changed files with 1 additions and 3 deletions
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4
drivers/net/ethernet/hisilicon/hip04_eth.c
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@ -919,10 +919,8 @@ 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;