linux-kernel - Re: [PATCH] shm: fix a race between shm_exit() and shm

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Message-ID: <CA+55aFx+JOeDoNzs+1wfdK3kpNPyS9wpU1OT=VAwvWPXfMVuDQ@mail.gmail.com>
Date:	Tue, 2 Aug 2011 22:19:24 -1000
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Marc Zyngier <marc.zyngier@....com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Vasiliy Kulikov <segoon@...nwall.com>,
	Manuel Lauss <manuel.lauss@...glemail.com>,
	linux-kernel@...r.kernel.org, Richard Weinberger <richard@....at>,
	Ingo Molnar <mingo@...e.hu>,
	kernel-hardening@...ts.openwall.com,
	"Paul E. McKenney" <paul.mckenney@...aro.org>
Subject: Re: [PATCH] shm: fix a race between shm_exit() and shm_init()

On Tue, Aug 2, 2011 at 10:05 PM, Marc Zyngier <marc.zyngier@....com> wrote:
>
> Reordering the initcalls seems the easiest solution, but it is still very
> fragile...

So that's what I tried to do, by making it a "pure_initcall()". Even
that didn't seem to be enough according to Manuel.

Can you try my patch (that makes just that ipc ns init be a
pure_initcall(), together with your hack on top of Andrew's? What is
it that happens so early that even pure_initcall() hasn't been done
yet?

             Linus
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