From: Wen Yang Date: Sat, 6 Jul 2019 04:23:41 +0000 (+0800) Subject: net: pasemi: fix an use-after-free in pasemi_mac_phy_init() X-Git-Tag: v4.19.99~167 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=f9153eed0feb756d72f8749fc55ce44543a7b81d;p=thirdparty%2Fkernel%2Fstable.git net: pasemi: fix an use-after-free in pasemi_mac_phy_init() [ 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 Cc: "David S. Miller" Cc: Thomas Gleixner Cc: Luis Chamberlain Cc: Michael Ellerman Cc: netdev@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- diff --git a/drivers/net/ethernet/pasemi/pasemi_mac.c b/drivers/net/ethernet/pasemi/pasemi_mac.c index 8a31a02c9f47f..65f69e562618a 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;