From: Sasha Levin <sashal@kernel.org>
To: stable@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Pan Bian <bianpan2016@163.com>,
"David S . Miller" <davem@davemloft.net>,
Sasha Levin <sashal@kernel.org>,
netdev@vger.kernel.org
Subject: [PATCH AUTOSEL 4.4 22/33] net: hisilicon: remove unexpected free_netdev
Date: Wed, 5 Dec 2018 04:51:20 -0500 [thread overview]
Message-ID: <20181205095131.7685-22-sashal@kernel.org> (raw)
In-Reply-To: <20181205095131.7685-1-sashal@kernel.org>
From: Pan Bian <bianpan2016@163.com>
[ 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>
---
drivers/net/ethernet/hisilicon/hip04_eth.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/hisilicon/hip04_eth.c b/drivers/net/ethernet/hisilicon/hip04_eth.c
index 253f8ed0537a..60c727b0b7ab 100644
--- a/drivers/net/ethernet/hisilicon/hip04_eth.c
+++ b/drivers/net/ethernet/hisilicon/hip04_eth.c
@@ -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;
--
2.17.1
prev parent reply other threads:[~2018-12-05 9:51 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20181205095131.7685-1-sashal@kernel.org>
2018-12-05 9:51 ` [PATCH AUTOSEL 4.4 13/33] bpf: fix check of allowed specifiers in bpf_trace_printk Sasha Levin
2018-12-05 9:51 ` [PATCH AUTOSEL 4.4 19/33] net: thunderx: fix NULL pointer dereference in nic_remove Sasha Levin
2018-12-05 9:51 ` [PATCH AUTOSEL 4.4 20/33] ixgbe: recognize 1000BaseLX SFP modules as 1Gbps Sasha Levin
2018-12-05 9:51 ` [PATCH AUTOSEL 4.4 21/33] rapidio/rionet: do not free skb before reading its length Sasha Levin
2018-12-05 9:51 ` Sasha Levin [this message]
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