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=-9.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,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 73025C10F00 for ; Tue, 12 Mar 2019 18:05:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3A32721734 for ; Tue, 12 Mar 2019 18:05:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1552413936; bh=jqHHD2ErqTP4mhfq/+GgPz/pP9HzdIeiq8ZPFObdJzM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=U8G7hGIvRwrKWZcC55c6UyvqMYrFvXHkWfAysnWaXhT8IfWAYsB9K55yi8JAZ4E3P AUZoqQLfQwSHvsi/idzTWoRDMbm0hBMXP3FcLFLiqxkT0A2BZ8EHzcjU2xXTPr1vAg JiRf2dltESr5flO45Eh3cf/jHnfCl372ybi/RVxs= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727565AbfCLRMh (ORCPT ); Tue, 12 Mar 2019 13:12:37 -0400 Received: from mail.kernel.org ([198.145.29.99]:48138 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727555AbfCLRMg (ORCPT ); Tue, 12 Mar 2019 13:12:36 -0400 Received: from localhost (unknown [104.133.8.98]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id C9BC921741; Tue, 12 Mar 2019 17:12:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1552410755; bh=jqHHD2ErqTP4mhfq/+GgPz/pP9HzdIeiq8ZPFObdJzM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=QbufFgZ9lwL0PK88l/VDU8K1M3eLsgMwthdvYMQuZ3bXS1YNoaSVXgsDm7gmihRWP 1IfC9dbp8/Uqg2RnuxbqFrDipZ+sn75cwtPe8LtXbvYhYzXmXaejZcWXfBCeh73s0J 7bX7mHkULRP2cQw9jM2BeOMQxzFM6b2o1jLxh0Bs= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dan Carpenter , Luis Chamberlain , Andrew Morton , Linus Torvalds , Sasha Levin Subject: [PATCH 4.20 066/171] lib/test_kmod.c: potential double free in error handling Date: Tue, 12 Mar 2019 10:07:26 -0700 Message-Id: <20190312170353.870866511@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190312170347.868927101@linuxfoundation.org> References: <20190312170347.868927101@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org 4.20-stable review patch. If anyone has any objections, please let me know. ------------------ [ Upstream commit db7ddeab3ce5d64c9696e70d61f45ea9909cd196 ] There is a copy and paste bug so we set "config->test_driver" to NULL twice instead of setting "config->test_fs". Smatch complains that it leads to a double free: lib/test_kmod.c:840 __kmod_config_init() warn: 'config->test_fs' double freed Link: http://lkml.kernel.org/r/20190121140011.GA14283@kadam Fixes: d9c6a72d6fa2 ("kmod: add test driver to stress test the module loader") Signed-off-by: Dan Carpenter Acked-by: Luis Chamberlain Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds Signed-off-by: Sasha Levin --- lib/test_kmod.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/lib/test_kmod.c b/lib/test_kmod.c index d82d022111e0..9cf77628fc91 100644 --- a/lib/test_kmod.c +++ b/lib/test_kmod.c @@ -632,7 +632,7 @@ static void __kmod_config_free(struct test_config *config) config->test_driver = NULL; kfree_const(config->test_fs); - config->test_driver = NULL; + config->test_fs = NULL; } static void kmod_config_free(struct kmod_test_device *test_dev) -- 2.19.1