linux-kernel - Re: [PATCH 6/9] user namespaces: convert all capable checks in kernel/sys.c

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Date:	Fri, 18 Feb 2011 16:01:24 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	"Serge E. Hallyn" <serge@...lyn.com>
Cc:	LSM <linux-security-module@...r.kernel.org>,
	James Morris <jmorris@...ei.org>,
	Kees Cook <kees.cook@...onical.com>,
	containers@...ts.linux-foundation.org,
	kernel list <linux-kernel@...r.kernel.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Alexey Dobriyan <adobriyan@...il.com>,
	Michael Kerrisk <mtk.manpages@...il.com>, xemul@...allels.com,
	dhowells@...hat.com
Subject: Re: [PATCH 6/9] user namespaces: convert all capable checks in
 kernel/sys.c

On Thu, 17 Feb 2011 15:03:42 +0000
"Serge E. Hallyn" <serge@...lyn.com> wrote:

> @@ -1177,8 +1189,11 @@ SYSCALL_DEFINE2(sethostname, char __user *, name, int, len)
>  	int errno;
>  	char tmp[__NEW_UTS_LEN];
>  
> -	if (!ns_capable(current->nsproxy->uts_ns->user_ns, CAP_SYS_ADMIN))
> +	if (!ns_capable(current->nsproxy->uts_ns->user_ns, CAP_SYS_ADMIN)) {
> +		printk(KERN_NOTICE "%s: did not have CAP_SYS_ADMIN\n", __func__);
>  		return -EPERM;
> +	}
> +	printk(KERN_NOTICE "%s: did have CAP_SYS_ADMIN\n", __func__);
>  	if (len < 0 || len > __NEW_UTS_LEN)
>  		return -EINVAL;
>  	down_write(&uts_sem);

Left over debugging printks?
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