linux-kernel - Re: [PATCH] signals: check_kill_permission: don't check creds if same_thread

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Date:	Mon, 17 May 2010 18:25:46 -0700 (PDT)
From:	Roland McGrath <roland@...hat.com>
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Andrew Tridgell <tridge@...ba.org>,
	David Howells <dhowells@...hat.com>,
	Eric Paris <eparis@...isplace.org>,
	Jakub Jelinek <jakub@...hat.com>,
	James Morris <jmorris@...ei.org>,
	Stephen Smalley <sds@...ho.nsa.gov>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] signals: check_kill_permission: don't check creds if
	same_thread_group()

Acked-by: Roland McGrath <roland@...hat.com>

I concur that there is no real security benefit from checking uids for any
CLONE_VM case.  But there is also no reason to change the old behavior in
this corner for any case but CLONE_THREAD.


Thanks,
Roland
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