linux-kernel - [PATCH] net: phy: Handle postive return codes in phy

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Date:	Sat,  5 Sep 2015 13:01:29 -0500
From:	Michael Welling <mwelling@...e.org>
To:	Florian Fainelli <f.fainelli@...il.com>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc:	Michael Welling <mwelling@...e.org>
Subject: [PATCH] net: phy: Handle postive return codes in phy_connect

The function phy_connect_direct can possibly return a positive
return code. Using ERR_PTR with a positive value can lead to
deferencing of an invalid pointer.

Signed-off-by: Michael Welling <mwelling@...e.org>
---
 drivers/net/phy/phy_device.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index c0f2111..a7e14a6 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -477,6 +477,9 @@ struct phy_device *phy_connect(struct net_device *dev, const char *bus_id,
 	phydev = to_phy_device(d);
 
 	rc = phy_connect_direct(dev, phydev, handler, interface);
+	if (rc > 0)
+		return ERR_PTR(-ENODEV);
+
 	if (rc)
 		return ERR_PTR(rc);
 
-- 
2.1.4

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