From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9684AC33CAF for ; Thu, 16 Jan 2020 17:52:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6793A24681 for ; Thu, 16 Jan 2020 17:52:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579197135; bh=VpysHlMNeAQuSTtuAMo5Vv9qefu8VwtHAnO9zZEkQh0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=ARGvrB9yKDUZV49/rR+pqlqwo2lWhILRaWu9jNylMzD2OoImkBJVw7P2s740d3muy UyxyMw7ERYGWlQ0eu6QAs0ETJHYSDD4VY1BUMAxZyS5jvRTjY5fYNv9bEW1Yp3qaEr mg6nwNh9859cNcuQ5qx0h66M9dfP1SGSll8u88Dk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2406196AbgAPRp0 (ORCPT ); Thu, 16 Jan 2020 12:45:26 -0500 Received: from mail.kernel.org ([198.145.29.99]:37086 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2405892AbgAPRpY (ORCPT ); Thu, 16 Jan 2020 12:45:24 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 2703924781; Thu, 16 Jan 2020 17:45:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579196724; bh=VpysHlMNeAQuSTtuAMo5Vv9qefu8VwtHAnO9zZEkQh0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fwdIQOE7iJ0tmKPApA3Mrz5PLjlcNN9GaSAzuXIQsg3jxrDVs9phD7G9zUkA4+gTL b9rHRE+eKvk4O29+R9021MXj8ClFzvyLk12+q7U8O58KlkfYddWUCHp/p+TYCMLQPj pO4wHcGHyogK0mKP0wotKE86vcKQffTTo2U04wUY= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Wen Yang , "David S. Miller" , Thomas Gleixner , Luis Chamberlain , Michael Ellerman , netdev@vger.kernel.org, Sasha Levin Subject: [PATCH AUTOSEL 4.4 109/174] net: pasemi: fix an use-after-free in pasemi_mac_phy_init() Date: Thu, 16 Jan 2020 12:41:46 -0500 Message-Id: <20200116174251.24326-109-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200116174251.24326-1-sashal@kernel.org> References: <20200116174251.24326-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Wen Yang [ 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 --- 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 57a6e6cd74fc..48106953cf64 100644 --- a/drivers/net/ethernet/pasemi/pasemi_mac.c +++ b/drivers/net/ethernet/pasemi/pasemi_mac.c @@ -1091,7 +1091,6 @@ 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; @@ -1100,6 +1099,7 @@ 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; -- 2.20.1