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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham 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 D7C95C43381 for ; Mon, 11 Jan 2021 14:05:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A4ACE2071C for ; Mon, 11 Jan 2021 14:05:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388253AbhAKOFx (ORCPT ); Mon, 11 Jan 2021 09:05:53 -0500 Received: from mail.kernel.org ([198.145.29.99]:50872 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730086AbhAKNEA (ORCPT ); Mon, 11 Jan 2021 08:04:00 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 2DD1E22BEF; Mon, 11 Jan 2021 13:03:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1610370189; bh=pvktK5twh1eD4hu/UnoolytctEESt00y1DIetfJD+fs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ADxl226iDAykrKg0Qdh/lpVx9NET5lGgq8fFUyKN5dh3nn7pX213DbOPF0wQhYB4d IBWVwFPe7bMN2SPHKQmGUlK1udOtC0a5HUMLgKP1zTJzWslNjtZwza+97ADcKli8Xs JbblHjgwuwiFfFY454qtIDwgsLrK6TsO6m29n1jM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Rasmus Villemoes , Jakub Kicinski Subject: [PATCH 4.9 05/45] ethernet: ucc_geth: fix use-after-free in ucc_geth_remove() Date: Mon, 11 Jan 2021 14:00:43 +0100 Message-Id: <20210111130033.943663385@linuxfoundation.org> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210111130033.676306636@linuxfoundation.org> References: <20210111130033.676306636@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Rasmus Villemoes [ Upstream commit e925e0cd2a705aaacb0b907bb3691fcac3a973a4 ] ugeth is the netdiv_priv() part of the netdevice. Accessing the memory pointed to by ugeth (such as done by ucc_geth_memclean() and the two of_node_puts) after free_netdev() is thus use-after-free. Fixes: 80a9fad8e89a ("ucc_geth: fix module removal") Signed-off-by: Rasmus Villemoes Signed-off-by: Jakub Kicinski Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/freescale/ucc_geth.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/net/ethernet/freescale/ucc_geth.c +++ b/drivers/net/ethernet/freescale/ucc_geth.c @@ -3939,12 +3939,12 @@ static int ucc_geth_remove(struct platfo struct device_node *np = ofdev->dev.of_node; unregister_netdev(dev); - free_netdev(dev); ucc_geth_memclean(ugeth); if (of_phy_is_fixed_link(np)) of_phy_deregister_fixed_link(np); of_node_put(ugeth->ug_info->tbi_node); of_node_put(ugeth->ug_info->phy_node); + free_netdev(dev); return 0; }