linux-kernel - Re: [PATCH v3 5/8] fs: use new capable

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Message-ID: <20220628125659.l6irgn6ryoseojv3@wittgenstein>
Date:   Tue, 28 Jun 2022 14:56:59 +0200
From:   Christian Brauner <brauner@...nel.org>
To:     Christian Göttsche <cgzones@...glemail.com>
Cc:     selinux@...r.kernel.org, Alexander Viro <viro@...iv.linux.org.uk>,
        Serge Hallyn <serge@...lyn.com>, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-security-module@...r.kernel.org
Subject: Re: [PATCH v3 5/8] fs: use new capable_any functionality

On Wed, Jun 15, 2022 at 05:26:19PM +0200, Christian Göttsche wrote:
> Use the new added capable_any function in appropriate cases, where a
> task is required to have any of two capabilities.
> 
> Signed-off-by: Christian Göttsche <cgzones@...glemail.com>
> ---

Not seeing the whole patch series so it's a bit difficult to judge but
in general we've needed something like this for quite some time.

> v3:
>    rename to capable_any()
> ---
>  fs/pipe.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/pipe.c b/fs/pipe.c
> index 74ae9fafd25a..18ab3baeec44 100644
> --- a/fs/pipe.c
> +++ b/fs/pipe.c
> @@ -776,7 +776,7 @@ bool too_many_pipe_buffers_hard(unsigned long user_bufs)
>  
>  bool pipe_is_unprivileged_user(void)
>  {
> -	return !capable(CAP_SYS_RESOURCE) && !capable(CAP_SYS_ADMIN);
> +	return !capable_any(CAP_SYS_RESOURCE, CAP_SYS_ADMIN);
>  }
>  
>  struct pipe_inode_info *alloc_pipe_info(void)
> -- 
> 2.36.1
>