linux-kernel - Re: [PATCH v3] sparc: kernel/sbus.c: fix memory leakage

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Date:	Mon, 21 Jan 2013 22:20:36 +0000
From:	Richard Mortimer <richm@...elvet.org.uk>
To:	Cong Ding <dinggnu@...il.com>
CC:	Sam Ravnborg <sam@...nborg.org>,
	"David S. Miller" <davem@...emloft.net>,
	sparclinux@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] sparc: kernel/sbus.c: fix memory leakage

Reviewed-by: Richard Mortimer <richm@...elvet.org.uk>

On 17/01/2013 13:28, Cong Ding wrote:
> The variable iommu and strbuf are not freed properly if it goes to error.
>
> Signed-off-by: Cong Ding <dinggnu@...il.com>
> ---
>   arch/sparc/kernel/sbus.c |    6 +++---
>   1 files changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/arch/sparc/kernel/sbus.c b/arch/sparc/kernel/sbus.c
> index 1271b3a..be5bdf9 100644
> --- a/arch/sparc/kernel/sbus.c
> +++ b/arch/sparc/kernel/sbus.c
> @@ -554,10 +554,8 @@ static void __init sbus_iommu_init(struct platform_device *op)
>   	regs = pr->phys_addr;
>
>   	iommu = kzalloc(sizeof(*iommu), GFP_ATOMIC);
> -	if (!iommu)
> -		goto fatal_memory_error;
>   	strbuf = kzalloc(sizeof(*strbuf), GFP_ATOMIC);
> -	if (!strbuf)
> +	if (!iommu || !strbuf)
>   		goto fatal_memory_error;
>
>   	op->dev.archdata.iommu = iommu;
> @@ -656,6 +654,8 @@ static void __init sbus_iommu_init(struct platform_device *op)
>   	return;
>
>   fatal_memory_error:
> +	kfree(iommu);
> +	kfree(strbuf);
>   	prom_printf("sbus_iommu_init: Fatal memory allocation error.\n");
>   }
>
>
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