linux-kernel - Re: [PATCH] v4l2-core: v4l2-h264: check after increasing memory allocation

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Message-ID: <Y6AVkwh+V/PjzIfK@debian.me>
Date:   Mon, 19 Dec 2022 14:41:07 +0700
From:   Bagas Sanjaya <bagasdotme@...il.com>
To:     Li zeming <zeming@...china.com>, mchehab@...nel.org,
        hverkuil-cisco@...all.nl, nicolas.dufresne@...labora.com
Cc:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] v4l2-core: v4l2-h264: check after increasing memory
 allocation

On Mon, Dec 19, 2022 at 11:37:12AM +0800, Li zeming wrote:
> The pointer *out_str adds judgment and should help with program robustness.
> 

Terminology: if[-else] blocks are conditionals, not judgements.

> diff --git a/drivers/media/v4l2-core/v4l2-h264.c b/drivers/media/v4l2-core/v4l2-h264.c
> index 72bd64f65198..934aba539332 100644
> --- a/drivers/media/v4l2-core/v4l2-h264.c
> +++ b/drivers/media/v4l2-core/v4l2-h264.c
> @@ -305,6 +305,8 @@ static const char *format_ref_list_p(const struct v4l2_h264_reflist_builder *bui
>  	int n = 0, i;
>  
>  	*out_str = kmalloc(tmp_str_size, GFP_KERNEL);
> +	if (!*out_str)
> +		return NULL;

Why did you add the check beside robustness?

Thanks. 

-- 
An old man doll... just what I always wanted! - Clara

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