linux-kernel - Re: [PATCH -mm 1/2] umh && creds: convert call_usermodehelper_keys() to use subprocess

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Date:	Fri, 26 Feb 2010 18:00:38 +0000
From:	David Howells <dhowells@...hat.com>
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	dhowells@...hat.com, Andrew Morton <akpm@...ux-foundation.org>,
	Andi Kleen <andi@...stfloor.org>,
	Neil Horman <nhorman@...driver.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH -mm 1/2] umh && creds: convert call_usermodehelper_keys() to use subprocess_info->init()

Oleg Nesterov <oleg@...hat.com> wrote:

> +	/*
> +	 * This is called in context of freshly forked kthread before
> +	 * kernel_execve(), we can just change our ->session_keyring.
> +	 */

Ummmm....  What gives you that idea?

You may be sharing init_cred...

You need to create, modify and commit a new set of creds.

David
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