linux-kernel - Re: [PATCH 3/3] namei: Standardize callers of filename

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Date:   Tue, 7 Sep 2021 20:13:29 +0000
From:   Al Viro <viro@...iv.linux.org.uk>
To:     Stephen Brennan <stephen.s.brennan@...cle.com>
Cc:     linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] namei: Standardize callers of filename_create()

On Wed, Sep 01, 2021 at 10:51:43AM -0700, Stephen Brennan wrote:
>  inline struct dentry *user_path_create(int dfd, const char __user *pathname,
>  				struct path *path, unsigned int lookup_flags)
>  {
> -	return filename_create(dfd, getname(pathname), path, lookup_flags);
> +	struct filename *filename;
> +	struct dentry *dentry;
> +
> +	filename = getname(pathname);
> +	dentry = filename_create(dfd, getname(pathname), path, lookup_flags);
> +	putname(filename);
> +	return dentry;

Leaks, obviously...