linux-kernel - Re: [PATCH] arm: mach-omap2: potential NULL dereference

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Date:	Mon, 17 Jan 2011 15:30:56 +0300
From:	Sergei Shtylyov <sshtylyov@...sta.com>
To:	Vasiliy Kulikov <segoon@...nwall.com>
CC:	kernel-janitors@...r.kernel.org, Tony Lindgren <tony@...mide.com>,
	linux-omap@...r.kernel.org, Russell King <linux@....linux.org.uk>,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] arm: mach-omap2: potential NULL dereference

Hello.

On 17-01-2011 13:08, Vasiliy Kulikov wrote:

> kzalloc() may fail, if so return -ENOMEM.

> Signed-off-by: Vasiliy Kulikov<segoon@...nwall.com>
[...]

> diff --git a/arch/arm/mach-omap2/smartreflex.c b/arch/arm/mach-omap2/smartreflex.c
> index 77ecebf..871bca9 100644
> --- a/arch/arm/mach-omap2/smartreflex.c
> +++ b/arch/arm/mach-omap2/smartreflex.c
> @@ -260,7 +260,10 @@ static int sr_late_init(struct omap_sr *sr_info)
>   	if (sr_class->class_type == SR_CLASS2&&
>   		sr_class->notify_flags&&  sr_info->irq) {
>
> +		ret = -ENOMEM;
>   		name = kzalloc(SMARTREFLEX_NAME_LEN + 1, GFP_KERNEL);
> +		if (name == NULL)
> +			goto error;

    Why not:

		if (name == NULL) {
			ret = -ENOMEM;
			goto error;
		}

WBR, Sergei
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