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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Stefan Wahren <stefan.wahren@i2se.com>,
        Raghuram Chary Jallipalli 
        <raghuramchary.jallipalli@microchip.com>,
        "David S. Miller" <davem@davemloft.net>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 4.9 036/222] net: lan78xx: Bail out if lan78xx_get_endpoints fails
Date:   Fri, 22 Nov 2019 11:26:16 +0100
Message-Id: <20191122100846.707774879@linuxfoundation.org>
In-Reply-To: <20191122100830.874290814@linuxfoundation.org>
References: <20191122100830.874290814@linuxfoundation.org>
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From: Stefan Wahren <stefan.wahren@i2se.com>

[ Upstream commit fa8cd98c06407b5798b927cd7fd14d30f360ed02 ]

We need to bail out if lan78xx_get_endpoints() fails, otherwise the
result is overwritten.

Fixes: 55d7de9de6c3 ("Microchip's LAN7800 family USB 2/3 to 10/100/1000 Ethernet")
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Reviewed-by: Raghuram Chary Jallipalli <raghuramchary.jallipalli@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/usb/lan78xx.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c
index e143a7fe93201..a3f9d8f05db4a 100644
--- a/drivers/net/usb/lan78xx.c
+++ b/drivers/net/usb/lan78xx.c
@@ -2621,6 +2621,11 @@ static int lan78xx_bind(struct lan78xx_net *dev, struct usb_interface *intf)
 	int i;
 
 	ret = lan78xx_get_endpoints(dev, intf);
+	if (ret) {
+		netdev_warn(dev->net, "lan78xx_get_endpoints failed: %d\n",
+			    ret);
+		return ret;
+	}
 
 	dev->data[0] = (unsigned long)kzalloc(sizeof(*pdata), GFP_KERNEL);
 
-- 
2.20.1