linux-kernel - Re: [PATCH 1/2] binder: use kstrdup() in binderfs_binder_device

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Message-ID: <aHXOw6DVD1AB5aIo@google.com>
Date: Tue, 15 Jul 2025 03:45:07 +0000
From: Carlos Llamas <cmllamas@...gle.com>
To: Dmitry Antipov <dmantipov@...dex.ru>
Cc: Arve Hjønnevåg <arve@...roid.com>,
	Todd Kjos <tkjos@...roid.com>, Martijn Coenen <maco@...roid.com>,
	"Tiffany Y . Yang" <ynaffit@...gle.com>,
	linux-kernel@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH 1/2] binder: use kstrdup() in
 binderfs_binder_device_create()

On Thu, Jun 26, 2025 at 10:30:53AM +0300, Dmitry Antipov wrote:
> In 'binderfs_binder_device_create()', use 'kstrdup()' to copy the
> newly created device's name, thus making the former a bit simpler.
> 
> Signed-off-by: Dmitry Antipov <dmantipov@...dex.ru>
> ---
>  drivers/android/binderfs.c | 5 +----
>  1 file changed, 1 insertion(+), 4 deletions(-)
> 
> diff --git a/drivers/android/binderfs.c b/drivers/android/binderfs.c
> index 024275dbfdd8..4f827152d18e 100644
> --- a/drivers/android/binderfs.c
> +++ b/drivers/android/binderfs.c
> @@ -117,7 +117,6 @@ static int binderfs_binder_device_create(struct inode *ref_inode,
>  	struct dentry *dentry, *root;
>  	struct binder_device *device;
>  	char *name = NULL;
> -	size_t name_len;
>  	struct inode *inode = NULL;
>  	struct super_block *sb = ref_inode->i_sb;
>  	struct binderfs_info *info = sb->s_fs_info;
> @@ -161,9 +160,7 @@ static int binderfs_binder_device_create(struct inode *ref_inode,
>  	inode->i_gid = info->root_gid;
>  
>  	req->name[BINDERFS_MAX_NAME] = '\0'; /* NUL-terminate */
> -	name_len = strlen(req->name);
> -	/* Make sure to include terminating NUL byte */
> -	name = kmemdup(req->name, name_len + 1, GFP_KERNEL);
> +	name = kstrdup(req->name, GFP_KERNEL);
>  	if (!name)
>  		goto err;
>  
> -- 
> 2.50.0
> 

Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

Thanks Dimitry,

Acked-by: Carlos Llamas <cmllamas@...gle.com>