From patchwork Mon Apr 20 12:33:55 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tiezhu Yang X-Patchwork-Id: 11498823 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C35AF1392 for ; Mon, 20 Apr 2020 12:34:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B447D20724 for ; Mon, 20 Apr 2020 12:34:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726836AbgDTMeI (ORCPT ); Mon, 20 Apr 2020 08:34:08 -0400 Received: from mail.loongson.cn ([114.242.206.163]:52256 "EHLO loongson.cn" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725886AbgDTMeE (ORCPT ); Mon, 20 Apr 2020 08:34:04 -0400 Received: from linux.localdomain (unknown [113.200.148.30]) by mail.loongson.cn (Coremail) with SMTP id AQAAf9Dxb9uzlp1eHSgqAA--.29S6; Mon, 20 Apr 2020 20:34:00 +0800 (CST) From: Tiezhu Yang To: Luis Chamberlain , Shuah Khan , Andrew Morton , Jessica Yu Cc: linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, Markus Elfring , Xuefeng Li Subject: [PATCH v3 4/4] test_kmod: Avoid potential double free in trigger_config_run_type() Date: Mon, 20 Apr 2020 20:33:55 +0800 Message-Id: <1587386035-5188-5-git-send-email-yangtiezhu@loongson.cn> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1587386035-5188-1-git-send-email-yangtiezhu@loongson.cn> References: <1587386035-5188-1-git-send-email-yangtiezhu@loongson.cn> MIME-Version: 1.0 X-CM-TRANSID: AQAAf9Dxb9uzlp1eHSgqAA--.29S6 X-Coremail-Antispam: 1UD129KBjvdXoW7WryUur17WFWUWry7Zw1fWFg_yoWDCwb_uF 17Jr1DWw1UJFya9w13uws3ZFs7ta4Utr18Zrs7tay7Gryaqr9xX3s5trn5XasxW398trWS g390yFn29wsxujkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUbhAFF20E14v26rWj6s0DM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28IrcIa0xkI8VA2jI8067AKxVWUAVCq3wA2048vs2 IY020Ec7CjxVAFwI0_Xr0E3s1l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0rcxSw2x7M28E F7xvwVC0I7IYx2IY67AKxVW8JVW5JwA2z4x0Y4vE2Ix0cI8IcVCY1x0267AKxVWxJVW8Jr 1l84ACjcxK6I8E87Iv67AKxVWxJr0_GcWl84ACjcxK6I8E87Iv6xkF7I0E14v26rxl6s0D M2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xIIjx v20xvE14v26r106r15McIj6I8E87Iv67AKxVW8JVWxJwAm72CE4IkC6x0Yz7v_Jr0_Gr1l F7xvr2IYc2Ij64vIr41lF7I21c0EjII2zVCS5cI20VAGYxC7MxkIecxEwVAFwVW5JwCF04 k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F40E14v26r1j6r18 MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_Jw0_GFylIxkGc2Ij64vIr4 1lIxAIcVC0I7IYx2IY67AKxVWUCVW8JwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Gr0_Cr1l IxAIcVCF04k26cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14v26r4j6F4UMIIF0xvEx4 A2jsIEc7CjxVAFwI0_Gr1j6F4UJbIYCTnIWIevJa73UjIFyTuYvjfUe73vUUUUU X-CM-SenderInfo: p1dqw3xlh2x3gn0dqz5rrqw2lrqou0/ Sender: linux-kselftest-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Reset the member "test_fs" of the test configuration after a call of the function "kfree_const" to a null pointer so that a double memory release will not be performed. Fixes: d9c6a72d6fa2 ("kmod: add test driver to stress test the module loader") Acked-by: Luis Chamberlain Signed-off-by: Tiezhu Yang --- v3: - use the quotes with correct format in the commit message, sorry for that v2: - update the commit message suggested by Markus Elfring - add the Fixes tag 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 e651c37..eab5277 100644 --- a/lib/test_kmod.c +++ b/lib/test_kmod.c @@ -745,7 +745,7 @@ static int trigger_config_run_type(struct kmod_test_device *test_dev, break; case TEST_KMOD_FS_TYPE: kfree_const(config->test_fs); - config->test_driver = NULL; + config->test_fs = NULL; copied = config_copy_test_fs(config, test_str, strlen(test_str)); break;