[PATCH] net: phy: Handle postive return codes in phy_connect

From: Michael Welling
Date: Sat Sep 05 2015 - 14:01:56 EST

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@xxxxxxxx>
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);


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