From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ursula Braun Subject: [PATCH net 2/2] net/smc: Fix preinitialization of buf_desc in __smc_buf_create() Date: Tue, 21 Nov 2017 13:23:54 +0100 Message-ID: <20171121122354.44006-3-ubraun@linux.vnet.ibm.com> References: <20171121122354.44006-1-ubraun@linux.vnet.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Cc: netdev@vger.kernel.org, linux-s390@vger.kernel.org, jwi@linux.vnet.ibm.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, raspl@linux.vnet.ibm.com, geert@linux-m68k.org, ubraun@linux.vnet.ibm.com To: davem@davemloft.net Return-path: Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:40266 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752194AbdKUMYH (ORCPT ); Tue, 21 Nov 2017 07:24:07 -0500 Received: from pps.filterd (m0098404.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id vALCK0ps127895 for ; Tue, 21 Nov 2017 07:24:07 -0500 Received: from e06smtp15.uk.ibm.com (e06smtp15.uk.ibm.com [195.75.94.111]) by mx0a-001b2d01.pphosted.com with ESMTP id 2ecky8rpj0-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Tue, 21 Nov 2017 07:24:06 -0500 Received: from localhost by e06smtp15.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Tue, 21 Nov 2017 12:24:02 -0000 In-Reply-To: <20171121122354.44006-1-ubraun@linux.vnet.ibm.com> Sender: netdev-owner@vger.kernel.org List-ID: From: Geert Uytterhoeven With gcc-4.1.2: net/smc/smc_core.c: In function ‘__smc_buf_create’: net/smc/smc_core.c:567: warning: ‘bufsize’ may be used uninitialized in this function Indeed, if the for-loop is never executed, bufsize is used uninitialized. In addition, buf_desc is stored for later use, while it is still a NULL pointer. Before, error handling was done by checking if buf_desc is non-NULL. The cleanup changed this to an error check, but forgot to update the preinitialization of buf_desc to an error pointer. Update the preinitializatin of buf_desc to fix this. Fixes: b33982c3a6838d13 ("net/smc: cleanup function __smc_buf_create()") Signed-off-by: Geert Uytterhoeven Signed-off-by: Ursula Braun Acked-by: Arnd Bergmann --- net/smc/smc_core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/smc/smc_core.c b/net/smc/smc_core.c index 3b5e5d4bc763..94f21116dac5 100644 --- a/net/smc/smc_core.c +++ b/net/smc/smc_core.c @@ -562,7 +562,7 @@ static int __smc_buf_create(struct smc_sock *smc, bool is_rmb) { struct smc_connection *conn = &smc->conn; struct smc_link_group *lgr = conn->lgr; - struct smc_buf_desc *buf_desc = NULL; + struct smc_buf_desc *buf_desc = ERR_PTR(-ENOMEM); struct list_head *buf_list; int bufsize, bufsize_short; int sk_buf_size; -- 2.13.5