linux-kernel - Re: [PATCH 1/6] SECURITY: selinux, fix update_rlimit

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Date:	Tue, 1 Sep 2009 08:22:23 +1000 (EST)
From:	James Morris <jmorris@...ei.org>
To:	Jiri Slaby <jirislaby@...il.com>
cc:	Andrew Morton <akpm@...ux-foundation.org>, mingo@...hat.com,
	oleg@...hat.com, linux-kernel@...r.kernel.org,
	Stephen Smalley <sds@...ho.nsa.gov>,
	Eric Paris <eparis@...isplace.org>,
	David Howells <dhowells@...hat.com>,
	linux-security-module@...r.kernel.org
Subject: Re: [PATCH 1/6] SECURITY: selinux, fix update_rlimit_cpu parameter

On Mon, 31 Aug 2009, Jiri Slaby wrote:

[added lsm list]

> diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
> index cf41988..496e626 100644
> --- a/security/selinux/hooks.c
> +++ b/security/selinux/hooks.c
> @@ -2360,7 +2360,7 @@ static void selinux_bprm_committing_creds(struct linux_binprm *bprm)
>  			initrlim = init_task.signal->rlim + i;
>  			rlim->rlim_cur = min(rlim->rlim_max, initrlim->rlim_cur);
>  		}
> -		update_rlimit_cpu(rlim->rlim_cur);
> +		update_rlimit_cpu(current->signal->rlim[RLIMIT_CPU].rlim_cur);

This doesn't look correct to me: the original code determines 
rlim->rlim_cur and then updates current to that.  With your change, this 
value is not used.

-- 
James Morris
<jmorris@...ei.org>
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