* [PATCH net-next] net: ethernet: mediatek: get out of potential invalid pointer access
@ 2016-09-22 8:44 sean.wang
2016-09-22 12:23 ` David Miller
0 siblings, 1 reply; 2+ messages in thread
From: sean.wang @ 2016-09-22 8:44 UTC (permalink / raw)
To: john, davem
Cc: nbd, netdev, linux-kernel, linux-mediatek, keyhaede, objelf,
Sean Wang
From: Sean Wang <sean.wang@mediatek.com>
Potential dangerous invalid pointer might be accessed if
the error happens when couple phy_device to net_device so
cleanup the error path.
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
---
drivers/net/ethernet/mediatek/mtk_eth_soc.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
index a65801a..3d7e0cb 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -296,7 +296,9 @@ static int mtk_phy_connect(struct net_device *dev)
regmap_write(eth->ethsys, ETHSYS_SYSCFG0, val);
/* couple phydev to net_device */
- mtk_phy_connect_node(eth, mac, np);
+ if (mtk_phy_connect_node(eth, mac, np))
+ goto err_phy;
+
dev->phydev->autoneg = AUTONEG_ENABLE;
dev->phydev->speed = 0;
dev->phydev->duplex = 0;
@@ -317,7 +319,7 @@ static int mtk_phy_connect(struct net_device *dev)
err_phy:
of_node_put(np);
- dev_err(eth->dev, "invalid phy_mode\n");
+ dev_err(eth->dev, "%s: invalid phy\n", __func__);
return -EINVAL;
}
--
1.9.1
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