linux-kernel - Re: [RFC PATCH] set TASK_TRACED before arch

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Message-ID: <3877989d0806022304w35764b17p9d4c3c95eceae0f5@mail.gmail.com>
Date:	Tue, 3 Jun 2008 14:04:39 +0800
From:	"Luming Yu" <luming.yu@...il.com>
To:	"Petr Tesarik" <ptesarik@...e.cz>
Cc:	"Roland McGrath" <roland@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>, linux-ia64@...r.kernel.org
Subject: Re: [RFC PATCH] set TASK_TRACED before arch_ptrace code to fix a race

On Tue, May 27, 2008 at 2:25 PM, Petr Tesarik <ptesarik@...e.cz> wrote:
> On Mon, 2008-05-26 at 23:12 -0700, Roland McGrath wrote:
>> >  [<a00000010000a9f0>] skip_rbs_switch+0xe0/0x110
>> >                                 sp=e000000141c9fe30 bsp=e000000141c90cf8
>> >  [<a000000000010740>] __kernel_syscall_via_break+0x0/0x20
>> >                                 sp=e000000141ca0000 bsp=e000000141c90cf8
>
> Indeed, there seems to be a large hole here. So, this is either a bug in
> the unwinder, or a bug in the RBS synchronization, which causes
> corruption. My test machine currently needs some work to run 2.6.25
> again, but I'll try your test case as soon as I re-install it later this
> week.

Just want to check if the test case works for you?
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