From patchwork Thu Jun 9 03:09:25 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wu Guanghao X-Patchwork-Id: 12874788 X-Patchwork-Delegate: jes@trained-monkey.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 56FCDC433EF for ; Thu, 9 Jun 2022 03:09:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237447AbiFIDJa (ORCPT ); Wed, 8 Jun 2022 23:09:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53234 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232220AbiFIDJa (ORCPT ); Wed, 8 Jun 2022 23:09:30 -0400 Received: from szxga08-in.huawei.com (szxga08-in.huawei.com [45.249.212.255]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D0EB3CFB for ; Wed, 8 Jun 2022 20:09:27 -0700 (PDT) Received: from dggpemm500022.china.huawei.com (unknown [172.30.72.55]) by szxga08-in.huawei.com (SkyGuard) with ESMTP id 4LJTY416Syz1K9m6; Thu, 9 Jun 2022 11:07:36 +0800 (CST) Received: from dggpemm500014.china.huawei.com (7.185.36.153) by dggpemm500022.china.huawei.com (7.185.36.162) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Thu, 9 Jun 2022 11:09:25 +0800 Received: from [10.174.177.211] (10.174.177.211) by dggpemm500014.china.huawei.com (7.185.36.153) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Thu, 9 Jun 2022 11:09:25 +0800 Message-ID: Date: Thu, 9 Jun 2022 11:09:25 +0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.0.3 Subject: [PATCH 5/5 v2] get_vd_num_of_subarray: fix memleak From: Wu Guanghao To: , , Mariusz Tkaczyk , Paul Menzel CC: , References: In-Reply-To: X-Originating-IP: [10.174.177.211] X-ClientProxiedBy: dggems702-chm.china.huawei.com (10.3.19.179) To dggpemm500014.china.huawei.com (7.185.36.153) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-raid@vger.kernel.org sra = sysfs_read() should be free before return in get_vd_num_of_subarray() Reported-by: Coverity Signed-off-by: Wu Guanghao Acked-by: Mariusz Tkaczyk --- super-ddf.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) -- 2.27.0 diff --git a/super-ddf.c b/super-ddf.c index 8cda23a7..827e4ae7 100644 --- a/super-ddf.c +++ b/super-ddf.c @@ -1599,15 +1599,20 @@ static unsigned int get_vd_num_of_subarray(struct supertype *st) sra = sysfs_read(-1, st->devnm, GET_VERSION); if (!sra || sra->array.major_version != -1 || sra->array.minor_version != -2 || - !is_subarray(sra->text_version)) + !is_subarray(sra->text_version)) { + if (sra) + sysfs_free(sra); return DDF_NOTFOUND; + } sub = strchr(sra->text_version + 1, '/'); if (sub != NULL) vcnum = strtoul(sub + 1, &end, 10); if (sub == NULL || *sub == '\0' || *end != '\0' || - vcnum >= be16_to_cpu(ddf->active->max_vd_entries)) + vcnum >= be16_to_cpu(ddf->active->max_vd_entries)) { + sysfs_free(sra); return DDF_NOTFOUND; + } return vcnum; }