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=-19.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, 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=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 691FDC4338F for ; Mon, 26 Jul 2021 15:45:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 501E460F59 for ; Mon, 26 Jul 2021 15:45:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236092AbhGZPFS (ORCPT ); Mon, 26 Jul 2021 11:05:18 -0400 Received: from mail.kernel.org ([198.145.29.99]:44560 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235978AbhGZPE1 (ORCPT ); Mon, 26 Jul 2021 11:04:27 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id E2CF660F38; Mon, 26 Jul 2021 15:44:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1627314295; bh=mp11EiE24wDcNafm9JEypj8lxrQqDu93h6rWFarLp/U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=IDstCVxzPfRioIo+UnI8tX9UjZcoM+93sIjHNKHq3HIWZMAGeLXaDkvadj70v+Vyd sbso2cnhqGpcWTO+vyk7XqTP4IuxNGBrDmle9UgbLD4jA7uKNNvcO6ntxtmFP/UEFQ dOn0i5wtotoM3aL3Th/UsLzqFZa929E/LZ6ZfyUw= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Pavel Skripkin , "David S. Miller" Subject: [PATCH 4.9 20/60] net: ti: fix UAF in tlan_remove_one Date: Mon, 26 Jul 2021 17:38:34 +0200 Message-Id: <20210726153825.506530218@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210726153824.868160836@linuxfoundation.org> References: <20210726153824.868160836@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: Pavel Skripkin commit 0336f8ffece62f882ab3012820965a786a983f70 upstream. priv is netdev private data and it cannot be used after free_netdev() call. Using priv after free_netdev() can cause UAF bug. Fix it by moving free_netdev() at the end of the function. Fixes: 1e0a8b13d355 ("tlan: cancel work at remove path") Signed-off-by: Pavel Skripkin Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/ti/tlan.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) --- a/drivers/net/ethernet/ti/tlan.c +++ b/drivers/net/ethernet/ti/tlan.c @@ -313,9 +313,8 @@ static void tlan_remove_one(struct pci_d pci_release_regions(pdev); #endif - free_netdev(dev); - cancel_work_sync(&priv->tlan_tqueue); + free_netdev(dev); } static void tlan_start(struct net_device *dev)