linux-kernel - Re: [PATCH] fix race copy_process() vs de

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Message-Id: <20090824062001.0E526414DF@magilla.sf.frob.com>
Date:	Sun, 23 Aug 2009 23:20:01 -0700 (PDT)
From:	Roland McGrath <roland@...hat.com>
To:	Hiroshi Shimamoto <h-shimamoto@...jp.nec.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Oleg Nesterov <oleg@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] fix race copy_process() vs de_thread()

Ah, I see.  This happens when the copy_process() thread was the old
group_leader itself.  Then it never does release_task() itself.

Your fix seems adequate.  Another approach would be to have some place
like exit_signals() check for the group_exit_task case.

Oleg, what do you think?

Thanks,
Roland
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