linux-kernel - Re: [PATCH] drm: tegra: fix memory leak in error handling path

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Date:   Tue, 29 Mar 2022 11:55:38 +0100
From:   Jon Hunter <jonathanh@...dia.com>
To:     cgel.zte@...il.com, thierry.reding@...il.com
Cc:     airlied@...ux.ie, daniel@...ll.ch, dri-devel@...ts.freedesktop.org,
        linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org,
        Lv Ruyi <lv.ruyi@....com.cn>, Zeal Robot <zealci@....com.cn>
Subject: Re: [PATCH] drm: tegra: fix memory leak in error handling path


On 29/03/2022 11:37, cgel.zte@...il.com wrote:
> From: Lv Ruyi <lv.ruyi@....com.cn>
> 
> Before leave the nvdec_load_firmware, we shuold free virt which is alloced

s/shuold/should
s/alloced/allocated

> by dma_alloc_coherent, so change "return err" to "goto cleanup".
> 
> Reported-by: Zeal Robot <zealci@....com.cn>
> Signed-off-by: Lv Ruyi <lv.ruyi@....com.cn>
> ---
>   drivers/gpu/drm/tegra/nvdec.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/tegra/nvdec.c b/drivers/gpu/drm/tegra/nvdec.c
> index 79e1e88203cf..a14863346bfa 100644
> --- a/drivers/gpu/drm/tegra/nvdec.c
> +++ b/drivers/gpu/drm/tegra/nvdec.c
> @@ -209,7 +209,7 @@ static int nvdec_load_firmware(struct nvdec *nvdec)
>   
>   		err = dma_mapping_error(nvdec->dev, iova);
>   		if (err < 0)
> -			return err;
> +			goto cleanup;


Actually, I think that the correct fix here would be the same as what 
was done for VIC ...

https://lore.kernel.org/linux-mm/6b86f6e530b504a5eee864af10e2ae1570d7b645.1639157090.git.robin.murphy@arm.com/

Jon

-- 
nvpublic