linux-kernel - Re: [patch] scsi_dh_alua: uninitialized variable in alua_check

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Date:	Fri, 11 Mar 2016 11:50:30 +0100
From:	Hannes Reinecke <hare@...e.de>
To:	Dan Carpenter <dan.carpenter@...cle.com>,
	"James E.J. Bottomley" <JBottomley@...n.com>
Cc:	"Martin K. Petersen" <martin.petersen@...cle.com>,
	Bart Van Assche <bart.vanassche@...disk.com>,
	Johannes Thumshirn <jthumshirn@...e.de>,
	Ewan Milne <emilne@...hat.com>, linux-scsi@...r.kernel.org,
	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: [patch] scsi_dh_alua: uninitialized variable in alua_check_vpd()

On 03/11/2016 11:17 AM, Dan Carpenter wrote:
> The pg_updated variable is support to be set to zero at the start but
> it is uninitialized.
> 
> Fixes: cb0a168cb6b8 ('scsi_dh_alua: update 'access_state' field')
> Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
> 
> diff --git a/drivers/scsi/device_handler/scsi_dh_alua.c b/drivers/scsi/device_handler/scsi_dh_alua.c
> index 5bcdf8d..e4f6174 100644
> --- a/drivers/scsi/device_handler/scsi_dh_alua.c
> +++ b/drivers/scsi/device_handler/scsi_dh_alua.c
> @@ -332,7 +332,7 @@ static int alua_check_vpd(struct scsi_device *sdev, struct alua_dh_data *h,
>  {
>  	int rel_port = -1, group_id;
>  	struct alua_port_group *pg, *old_pg = NULL;
> -	bool pg_updated;
> +	bool pg_updated = 0;
>  	unsigned long flags;
>  
>  	group_id = scsi_vpd_tpg_id(sdev, &rel_port);
> 
I'd prefer 'pg_updated = false'.
Not that we trip over a static code analyser here :-)

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		   Teamlead Storage & Networking
hare@...e.de			               +49 911 74053 688
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
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