linux-kernel - Re: [PATCH] media: staging: starfive: camss: fix off by one in isp_enum_mbus

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Date:   Wed, 29 Nov 2023 10:10:50 +0800
From:   Changhuang Liang <changhuang.liang@...rfivetech.com>
To:     Dan Carpenter <dan.carpenter@...aro.org>,
        Jack Zhu <jack.zhu@...rfivetech.com>
CC:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        <linux-media@...r.kernel.org>, <linux-staging@...ts.linux.dev>,
        <linux-kernel@...r.kernel.org>, <kernel-janitors@...r.kernel.org>
Subject: Re: [PATCH] media: staging: starfive: camss: fix off by one in
 isp_enum_mbus_code()



On 2023/11/28 22:40, Dan Carpenter wrote:
> These > comparisons should be >=.  The formats->fmts[] array is either
> a pointer to isp_formats_sink[] or isp_formats_source[] respectively.
> 
> Fixes: e57854628f58 ("media: staging: media: starfive: camss: Add ISP driver")
> Signed-off-by: Dan Carpenter <dan.carpenter@...aro.org>

Reviewed-by: Changhuang Liang <changhuang.liang@...rfivetech.com>

> ---
>  drivers/staging/media/starfive/camss/stf-isp.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/staging/media/starfive/camss/stf-isp.c b/drivers/staging/media/starfive/camss/stf-isp.c
> index 893dbd8cddc8..98d61d71c31b 100644
> --- a/drivers/staging/media/starfive/camss/stf-isp.c
> +++ b/drivers/staging/media/starfive/camss/stf-isp.c
> @@ -120,7 +120,7 @@ static int isp_enum_mbus_code(struct v4l2_subdev *sd,
>  	const struct stf_isp_format_table *formats;
>  
>  	if (code->pad == STF_ISP_PAD_SINK) {
> -		if (code->index > ARRAY_SIZE(isp_formats_sink))
> +		if (code->index >= ARRAY_SIZE(isp_formats_sink))
>  			return -EINVAL;
>  
>  		formats = &isp_dev->formats[SINK_FORMATS_INDEX];
> @@ -128,7 +128,7 @@ static int isp_enum_mbus_code(struct v4l2_subdev *sd,
>  	} else {
>  		struct v4l2_mbus_framefmt *sink_fmt;
>  
> -		if (code->index > ARRAY_SIZE(isp_formats_source))
> +		if (code->index >= ARRAY_SIZE(isp_formats_source))
>  			return -EINVAL;
>  
>  		sink_fmt = v4l2_subdev_state_get_format(state,