From: Wen Yang wen.yang99@zte.com.cn
[ Upstream commit faf5577f2498cea23011b5c785ef853ded22700b ]
The phy_dn variable is still being used in of_phy_connect() after the of_node_put() call, which may result in use-after-free.
Fixes: 1dd2d06c0459 ("net: Rework pasemi_mac driver to use of_mdio infrastructure") Signed-off-by: Wen Yang wen.yang99@zte.com.cn Cc: "David S. Miller" davem@davemloft.net Cc: Thomas Gleixner tglx@linutronix.de Cc: Luis Chamberlain mcgrof@kernel.org Cc: Michael Ellerman mpe@ellerman.id.au Cc: netdev@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- drivers/net/ethernet/pasemi/pasemi_mac.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/pasemi/pasemi_mac.c b/drivers/net/ethernet/pasemi/pasemi_mac.c index 8a31a02..65f69e56 100644 --- a/drivers/net/ethernet/pasemi/pasemi_mac.c +++ b/drivers/net/ethernet/pasemi/pasemi_mac.c @@ -1053,7 +1053,6 @@ static int pasemi_mac_phy_init(struct net_device *dev)
dn = pci_device_to_OF_node(mac->pdev); phy_dn = of_parse_phandle(dn, "phy-handle", 0); - of_node_put(phy_dn);
mac->link = 0; mac->speed = 0; @@ -1062,6 +1061,7 @@ static int pasemi_mac_phy_init(struct net_device *dev) phydev = of_phy_connect(dev, phy_dn, &pasemi_adjust_link, 0, PHY_INTERFACE_MODE_SGMII);
+ of_node_put(phy_dn); if (!phydev) { printk(KERN_ERR "%s: Could not attach to phy\n", dev->name); return -ENODEV;