linux-kernel - Re: [Patch] Uninitialized variable in drivers/scsi/ncr53c8xx.c

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Message-Id: <20060831230049.db26d0e6.akpm@osdl.org>
Date:	Thu, 31 Aug 2006 23:00:49 -0700
From:	Andrew Morton <akpm@...l.org>
To:	Eric Sesterhenn <snakebyte@....de>
Cc:	linux-kernel@...r.kernel.org, matthew@....cx
Subject: Re: [Patch] Uninitialized variable in drivers/scsi/ncr53c8xx.c

On Fri, 01 Sep 2006 01:29:12 +0200
Eric Sesterhenn <snakebyte@....de> wrote:

> hi,
> 
> this was spotted by coverity (id #880).
> We use simple_strtoul() earlier to initialize pe,
> if the function fails, it also does not initialize it.
> Therefore we should initialize it ourselves, so the check
> in the OPT_TAGS case "if (pe && *pe == '/')" makes sense, and
> actually makes the command line parsing more robust.
> 
> Signed-off-by: Eric Sesterhenn <snakebyte@....de>

simple_strtoul() always initialises `pe'.

> --- linux-2.6.18-rc5/drivers/scsi/ncr53c8xx.c.orig	2006-09-01 01:25:09.000000000 +0200
> +++ linux-2.6.18-rc5/drivers/scsi/ncr53c8xx.c	2006-09-01 01:25:26.000000000 +0200
> @@ -692,7 +692,7 @@ static int __init sym53c8xx__setup(char 
>  	int xi = 0;
>  
>  	while (cur != NULL && (pc = strchr(cur, ':')) != NULL) {
> -		char *pe;
> +		char *pe = NULL;
>  
>  		val = 0;
>  		pv = pc;
> 

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