From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from szxga08-in.huawei.com (szxga08-in.huawei.com [45.249.212.255]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 28F43168 for ; Thu, 15 Jul 2021 01:17:19 +0000 (UTC) Received: from dggemv703-chm.china.huawei.com (unknown [172.30.72.53]) by szxga08-in.huawei.com (SkyGuard) with ESMTP id 4GQG7J63jXz1CJKh for ; Thu, 15 Jul 2021 08:52:44 +0800 (CST) Received: from dggema765-chm.china.huawei.com (10.1.198.207) by dggemv703-chm.china.huawei.com (10.3.19.46) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.1.2176.2; Thu, 15 Jul 2021 08:58:23 +0800 Received: from [127.0.0.1] (10.174.177.249) by dggema765-chm.china.huawei.com (10.1.198.207) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2; Thu, 15 Jul 2021 08:58:22 +0800 Subject: Re: [ndctl PATCH v2 2/2] namespace: Close fd before return in do_xaction_namespace() To: CC: , linfeilong , , Alison Schofield References: From: Zhiqiang Liu Message-ID: <6060dada-9ad0-c6bc-0c2a-89ced6414120@huawei.com> Date: Thu, 15 Jul 2021 08:58:22 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.2.2 Precedence: bulk X-Mailing-List: nvdimm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Content-Language: en-US X-Originating-IP: [10.174.177.249] X-ClientProxiedBy: dggems706-chm.china.huawei.com (10.3.19.183) To dggema765-chm.china.huawei.com (10.1.198.207) X-CFilter-Loop: Reflected friendly ping... On 2021/7/6 12:33, Zhiqiang Liu wrote: > Recently, we use Coverity to analysis the ndctl package, > one issue in do_xaction_namespace() is reported as follows, > CID 11690564: (RESOURCE_LEAK) > 2058. leaked_storage: Variable "ri_ctx" going out of scope > leaks the storage "ri_ctx.f_out" points to. > > In do_xaction_namespace(), ri_ctx.f_out should be closed after > being opened. This prevents a potential file descriptor leak > in do_xaction_namespace(). > > Signed-off-by: Zhiqiang Liu > --- > v1->v2: add coverity report info as suggested by Alison > > ndctl/namespace.c | 17 +++++++++-------- > 1 file changed, 9 insertions(+), 8 deletions(-) > > diff --git a/ndctl/namespace.c b/ndctl/namespace.c > index 21089d7..55364ac 100644 > --- a/ndctl/namespace.c > +++ b/ndctl/namespace.c > @@ -2141,7 +2141,7 @@ static int do_xaction_namespace(const char *namespace, > util_display_json_array(ri_ctx.f_out, ri_ctx.jblocks, 0); > if (rc >= 0) > (*processed)++; > - return rc; > + goto out; > } > } > > @@ -2152,11 +2152,11 @@ static int do_xaction_namespace(const char *namespace, > rc = file_write_infoblock(param.outfile); > if (rc >= 0) > (*processed)++; > - return rc; > + goto out; > } > > if (!namespace && action != ACTION_CREATE) > - return rc; > + goto out; > > if (verbose) > ndctl_set_log_priority(ctx, LOG_DEBUG); > @@ -2212,7 +2212,7 @@ static int do_xaction_namespace(const char *namespace, > saved_rc = rc; > continue; > } > - return rc; > + goto out; > } > ndctl_namespace_foreach_safe(region, ndns, _n) { > ndns_name = ndctl_namespace_get_devname(ndns); > @@ -2259,7 +2259,7 @@ static int do_xaction_namespace(const char *namespace, > rc = namespace_reconfig(region, ndns); > if (rc == 0) > *processed = 1; > - return rc; > + goto out; > case ACTION_READ_INFOBLOCK: > rc = namespace_rw_infoblock(ndns, &ri_ctx, READ); > if (rc == 0) > @@ -2281,9 +2281,6 @@ static int do_xaction_namespace(const char *namespace, > if (ri_ctx.jblocks) > util_display_json_array(ri_ctx.f_out, ri_ctx.jblocks, 0); > > - if (ri_ctx.f_out && ri_ctx.f_out != stdout) > - fclose(ri_ctx.f_out); > - > if (action == ACTION_CREATE && rc == -EAGAIN) { > /* > * Namespace creation searched through all candidate > @@ -2301,6 +2298,10 @@ static int do_xaction_namespace(const char *namespace, > if (saved_rc) > rc = saved_rc; > > +out: > + if (ri_ctx.f_out && ri_ctx.f_out != stdout) > + fclose(ri_ctx.f_out); > + > return rc; > } >