linux-kernel - Re: [PATCH] lib/string_helpers: Use passed in GFP

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Date:   Fri, 21 Jul 2023 18:08:59 +0300
From:   Andy Shevchenko <andy@...nel.org>
To:     Dan Carpenter <dan.carpenter@...aro.org>
Cc:     Michal Hocko <mhocko@...e.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Mel Gorman <mgorman@...e.de>, Vlastimil Babka <vbabka@...e.cz>,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] lib/string_helpers: Use passed in GFP_ flags

On Fri, Jul 21, 2023 at 05:57:00PM +0300, Dan Carpenter wrote:
> This patch doesn't affect runtime because all the callers pass GFP_KERNEL
> as the allocation flags.  However, it should use the passed in "gfp" as
> the allocation flags.

Please, Cc Kees Cook as he stepped in as a maintainer of this in particular.

Reviewed-by: Andy Shevchenko <andy@...nel.org>

> Fixes: 0ee931c4e31a ("mm: treewide: remove GFP_TEMPORARY allocation flag")
> Signed-off-by: Dan Carpenter <dan.carpenter@...aro.org>
> ---
>  lib/string_helpers.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/lib/string_helpers.c b/lib/string_helpers.c
> index d3b1dd718daf..be517c25737d 100644
> --- a/lib/string_helpers.c
> +++ b/lib/string_helpers.c
> @@ -668,7 +668,7 @@ char *kstrdup_quotable_cmdline(struct task_struct *task, gfp_t gfp)
>  	char *buffer, *quoted;
>  	int i, res;
>  
> -	buffer = kmalloc(PAGE_SIZE, GFP_KERNEL);
> +	buffer = kmalloc(PAGE_SIZE, gfp);
>  	if (!buffer)
>  		return NULL;
>  
> @@ -704,7 +704,7 @@ char *kstrdup_quotable_file(struct file *file, gfp_t gfp)
>  		return kstrdup("<unknown>", gfp);
>  
>  	/* We add 11 spaces for ' (deleted)' to be appended */
> -	temp = kmalloc(PATH_MAX + 11, GFP_KERNEL);
> +	temp = kmalloc(PATH_MAX + 11, gfp);
>  	if (!temp)
>  		return kstrdup("<no_memory>", gfp);
>  
> -- 
> 2.39.2
> 

-- 
With Best Regards,
Andy Shevchenko