linux-kernel - Re: [PATCH v2 8/8] net: use new capable

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Message-ID: <20220509171509.GB28406@mail.hallyn.com>
Date:   Mon, 9 May 2022 12:15:09 -0500
From:   "Serge E. Hallyn" <serge@...lyn.com>
To:     Christian Göttsche <cgzones@...glemail.com>
Cc:     selinux@...r.kernel.org, Serge Hallyn <serge@...lyn.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Alexander Aring <aahringo@...hat.com>,
        Ziyang Xuan <william.xuanziyang@...wei.com>,
        Eric Dumazet <edumazet@...gle.com>,
        linux-security-module@...r.kernel.org,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH v2 8/8] net: use new capable_or functionality

On Mon, May 02, 2022 at 06:00:29PM +0200, Christian Göttsche wrote:
> Use the new added capable_or function in appropriate cases, where a task
> is required to have any of two capabilities.
> 
> Reorder CAP_SYS_ADMIN last.
> 
> Signed-off-by: Christian Göttsche <cgzones@...glemail.com>

Thanks, for 2-8:

Reviewed-by: Serge Hallyn <serge@...lyn.com>

though I'd still like to talk about the name :)

> ---
>  net/caif/caif_socket.c | 2 +-
>  net/unix/scm.c         | 2 +-
>  2 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/net/caif/caif_socket.c b/net/caif/caif_socket.c
> index 2b8892d502f7..60498148126c 100644
> --- a/net/caif/caif_socket.c
> +++ b/net/caif/caif_socket.c
> @@ -1036,7 +1036,7 @@ static int caif_create(struct net *net, struct socket *sock, int protocol,
>  		.usersize = sizeof_field(struct caifsock, conn_req.param)
>  	};
>  
> -	if (!capable(CAP_SYS_ADMIN) && !capable(CAP_NET_ADMIN))
> +	if (!capable_or(CAP_NET_ADMIN, CAP_SYS_ADMIN))
>  		return -EPERM;
>  	/*
>  	 * The sock->type specifies the socket type to use.
> diff --git a/net/unix/scm.c b/net/unix/scm.c
> index aa27a02478dc..821be80e6c85 100644
> --- a/net/unix/scm.c
> +++ b/net/unix/scm.c
> @@ -99,7 +99,7 @@ static inline bool too_many_unix_fds(struct task_struct *p)
>  	struct user_struct *user = current_user();
>  
>  	if (unlikely(user->unix_inflight > task_rlimit(p, RLIMIT_NOFILE)))
> -		return !capable(CAP_SYS_RESOURCE) && !capable(CAP_SYS_ADMIN);
> +		return !capable_or(CAP_SYS_RESOURCE, CAP_SYS_ADMIN);
>  	return false;
>  }
>  
> -- 
> 2.36.0