Re: [PATCH v5] fs: clear file privilege bits when mmap writing

[Al Viro]

On Wed, Dec 09, 2015 at 02:51:48PM -0800, Kees Cook wrote:
> diff --git a/include/linux/fs.h b/include/linux/fs.h
> index 3aa514254161..409bd7047e7e 100644
> --- a/include/linux/fs.h
> +++ b/include/linux/fs.h
> @@ -872,6 +872,7 @@ struct file {
>  	struct list_head	f_tfile_llink;
>  #endif /* #ifdef CONFIG_EPOLL */
>  	struct address_space	*f_mapping;
> +	bool			f_remove_privs;

NAK.  If anything, such things belong in ->f_flags.  _If_ this is worth
doing at all, that is.
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