linux-kernel - Re: [PATCH] user_namespace: Remove unnecessary ‘NULL’ values from map

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Message-ID: <45d450dc-356b-e984-eff5-9f4c698e7ffe@infradead.org>
Date:   Mon, 31 Jul 2023 18:52:41 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Li zeming <zeming@...china.com>, paul@...l-moore.com,
        brauner@...nel.org, fred@...udflare.com, kpsingh@...nel.org
Cc:     linux-kernel@...r.kernel.org
Subject: Re: [PATCH] user_namespace: Remove unnecessary ‘NULL’ values from map_write



On 8/1/23 11:45, Li zeming wrote:

^^^^^^^^^^^^^^^

Please fix your system's date/time.

> kbuf is assigned first, so it does not need to initialize the
> assignment.
> 
> Signed-off-by: Li zeming <zeming@...china.com>

Reviewed-by: Randy Dunlap <rdunlap@...radead.org>

Thanks.

> ---
>  kernel/user_namespace.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/kernel/user_namespace.c b/kernel/user_namespace.c
> index 1d8e47bed3f1..6fabf388bb8a 100644
> --- a/kernel/user_namespace.c
> +++ b/kernel/user_namespace.c
> @@ -928,7 +928,7 @@ static ssize_t map_write(struct file *file, const char __user *buf,
>  	struct uid_gid_map new_map;
>  	unsigned idx;
>  	struct uid_gid_extent extent;
> -	char *kbuf = NULL, *pos, *next_line;
> +	char *kbuf, *pos, *next_line;
>  	ssize_t ret;
>  
>  	/* Only allow < page size writes at the beginning of the file */

-- 
~Randy