linux-kernel - Re: [PATCH 19/23] arm: Fix possible null pointer read access

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Message-ID: <87tygp82fh.fsf@ti.com>
Date:	Mon, 31 Jan 2011 08:26:26 -0800
From:	Kevin Hilman <khilman@...com>
To:	Stefan Weil <weil@...l.berlios.de>
Cc:	Tony Lindgren <tony@...mide.com>,
	Russell King <linux@....linux.org.uk>,
	linux-omap@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 19/23] arm: Fix possible null pointer read access

Stefan Weil <weil@...l.berlios.de> writes:

> These errors were found by cppcheck:
> arch/arm/mach-omap2/smartreflex.c:784: error: Possible null pointer dereference: sr_info
> arch/arm/mach-omap2/smartreflex.c:799: error: Possible null pointer dereference: sr_info
>
> Both conditional statements are executed when sr_info == NULL,
> so accessing sr_info->voltdm would fail.
>
> Cc: Russell King <linux@....linux.org.uk>
> Cc: linux-omap@...r.kernel.org
> Cc: linux-arm-kernel@...ts.infradead.org
> Cc: linux-kernel@...r.kernel.org
> Signed-off-by: Stefan Weil <weil@...l.berlios.de>

Thanks, queuing for 2.6.38-rc in my pm-fixes branch.

Kevin

> ---
>  arch/arm/mach-omap2/smartreflex.c |    6 ++----
>  1 files changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/arch/arm/mach-omap2/smartreflex.c b/arch/arm/mach-omap2/smartreflex.c
> index 77ecebf..af39d17 100644
> --- a/arch/arm/mach-omap2/smartreflex.c
> +++ b/arch/arm/mach-omap2/smartreflex.c
> @@ -780,8 +780,7 @@ static int omap_sr_autocomp_show(void *data, u64 *val)
>  	struct omap_sr *sr_info = (struct omap_sr *) data;
>
>  	if (!sr_info) {
> -		pr_warning("%s: omap_sr struct for sr_%s not found\n",
> -			__func__, sr_info->voltdm->name);
> +		pr_warning("%s: omap_sr struct not found\n", __func__);
>  		return -EINVAL;
>  	}
>
> @@ -795,8 +794,7 @@ static int omap_sr_autocomp_store(void *data, u64 val)
>  	struct omap_sr *sr_info = (struct omap_sr *) data;
>
>  	if (!sr_info) {
> -		pr_warning("%s: omap_sr struct for sr_%s not found\n",
> -			__func__, sr_info->voltdm->name);
> +		pr_warning("%s: omap_sr struct not found\n", __func__);
>  		return -EINVAL;
>  	}
>
> --
> 1.7.2.3
>
> --
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