linux-kernel - Re: [lm-sensors] [2.6 patch] hwmon/ibmpex.c: fix NULL dereference

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Date:	Wed, 17 Oct 2007 22:58:50 +0200
From:	Jean Delvare <khali@...ux-fr.org>
To:	Adrian Bunk <bunk@...nel.org>
Cc:	"Darrick J. Wong" <djwong@...ibm.com>,
	"Mark M. Hoffman" <mhoffman@...htlink.com>,
	linux-kernel@...r.kernel.org, lm-sensors@...sensors.org
Subject: Re: [lm-sensors] [2.6 patch] hwmon/ibmpex.c: fix NULL dereference

On Wed, 17 Oct 2007 21:29:02 +0200, Adrian Bunk wrote:
> Don't dereference "data" when we know for sure it's NULL.
> 
> Spotted by the Coverity checker.
> 
> Signed-off-by: Adrian Bunk <bunk@...nel.org>
> 
> ---
> 66bec2ef5c6d55fc30ef6ac5bb97fdfcfaf394f2 
> diff --git a/drivers/hwmon/ibmpex.c b/drivers/hwmon/ibmpex.c
> index c462824..e14ce3d 100644
> --- a/drivers/hwmon/ibmpex.c
> +++ b/drivers/hwmon/ibmpex.c
> @@ -457,7 +457,7 @@ static void ibmpex_register_bmc(int iface, struct device *dev)
>  	data = kzalloc(sizeof(*data), GFP_KERNEL);
>  	if (!data) {
>  		printk(KERN_ERR DRVNAME ": Insufficient memory for BMC "
> -		       "interface %d.\n", data->interface);
> +		       "interface.\n");
>  		return;
>  	}

As a side note, dev_err() should be used instead of printk here, and
possibly in other places. Darrick, could you please send a patch fixing
this?

Thanks,
-- 
Jean Delvare
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