From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752148AbcDOF7e (ORCPT ); Fri, 15 Apr 2016 01:59:34 -0400 Received: from mx2.suse.de ([195.135.220.15]:41933 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751157AbcDOF7c (ORCPT ); Fri, 15 Apr 2016 01:59:32 -0400 Subject: Re: [patch v2] scsi_dh_alua: uninitialized variable in alua_rtpg() To: Dan Carpenter , "James E.J. Bottomley" References: <20160414182034.GA32469@mwanda> Cc: "Martin K. Petersen" , Bart Van Assche , Johannes Thumshirn , Ewan Milne , linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org From: Hannes Reinecke Message-ID: <57108342.2070106@suse.de> Date: Fri, 15 Apr 2016 07:59:30 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.7.0 MIME-Version: 1.0 In-Reply-To: <20160414182034.GA32469@mwanda> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 04/14/2016 08:20 PM, Dan Carpenter wrote: > It's possible to use "err" without initializing it. If it happens to be > a 2 which is SCSI_DH_RETRY then that could cause a bug. Bart Van Assche > pointed out that we should probably re-initialize it for every iteration > through the retry loop. > > Signed-off-by: Dan Carpenter > --- > v2: The first version just initialized it at the start of the function. > > diff --git a/drivers/scsi/device_handler/scsi_dh_alua.c b/drivers/scsi/device_handler/scsi_dh_alua.c > index 8eaed05..a655cf2 100644 > --- a/drivers/scsi/device_handler/scsi_dh_alua.c > +++ b/drivers/scsi/device_handler/scsi_dh_alua.c > @@ -532,6 +532,7 @@ static int alua_rtpg(struct scsi_device *sdev, struct alua_port_group *pg) > return SCSI_DH_DEV_TEMP_BUSY; > > retry: > + err = 0; > retval = submit_rtpg(sdev, buff, bufflen, &sense_hdr, pg->flags); > > if (retval) { > Reviewed-by: Hannes Reinecke Cheers, Hannes -- Dr. Hannes Reinecke Teamlead Storage & Networking hare@suse.de +49 911 74053 688 SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: F. Imendörffer, J. Smithard, J. Guild, D. Upmanyu, G. Norton HRB 21284 (AG Nürnberg)