From: Wen Yang <wen.yang99@zte.com.cn>
Date: Wed, 26 Dec 2018 08:28:30 +0000 (+0800)
Subject: net/wan/fsl_ucc_hdlc: Avoid double free in ucc_hdlc_probe()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=a6082b56e9eddfc23e432ff63fc092413992d2d2;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

net/wan/fsl_ucc_hdlc: Avoid double free in ucc_hdlc_probe()

[ Upstream commit 40752b3eae29f8ca2378e978a02bd6dbeeb06d16 ]

This patch fixes potential double frees if register_hdlc_device() fails.

Signed-off-by: Wen Yang <wen.yang99@zte.com.cn>
Reviewed-by: Peng Hao <peng.hao2@zte.com.cn>
CC: Zhao Qiang <qiang.zhao@nxp.com>
CC: "David S. Miller" <davem@davemloft.net>
CC: netdev@vger.kernel.org
CC: linuxppc-dev@lists.ozlabs.org
CC: linux-kernel@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/net/wan/fsl_ucc_hdlc.c b/drivers/net/wan/fsl_ucc_hdlc.c
index 18b648648adb..289dff262948 100644
--- a/drivers/net/wan/fsl_ucc_hdlc.c
+++ b/drivers/net/wan/fsl_ucc_hdlc.c
@@ -1114,7 +1114,6 @@ static int ucc_hdlc_probe(struct platform_device *pdev)
 	if (register_hdlc_device(dev)) {
 		ret = -ENOBUFS;
 		pr_err("ucc_hdlc: unable to register hdlc device\n");
-		free_netdev(dev);
 		goto free_dev;
 	}