From: Shi Weihua <shiwh@cn.fujitsu.com>
To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: mikpe@it.uu.se, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/3] signal(i386): alternative signal stack wraparound occurs
Date: Thu, 04 Oct 2007 21:33:12 +0900 [thread overview]
Message-ID: <4704DD88.8030804@cn.fujitsu.com> (raw)
In-Reply-To: <20071004211746.3071b717.kamezawa.hiroyu@jp.fujitsu.com>
KAMEZAWA Hiroyuki wrote::
> On Thu, 04 Oct 2007 20:56:14 +0900
> Shi Weihua <shiwh@cn.fujitsu.com> wrote:
>
>> stack.ss_sp = addr + pagesize;
>> stack.ss_flags = 0;
>> stack.ss_size = pagesize;
> Here is bad.
> stack,ss_sp = addr;
> stack.ss_flags = 0;
> stack.ss_size = pagesize * 2;
[What the test code want to do]
addr+pagesize*2 - addr+pagesize -> sigaltstack
addr+pagesize - addr -> protected region
The code want to catch overflow when esp enter the protected region.
But it failed ...
>
> cheers.
> -Kame
>
>
>
next prev parent reply other threads:[~2007-10-04 12:33 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-03 13:46 [PATCH 1/3] signal(i386): alternative signal stack wraparound occurs Mikael Pettersson
2007-10-03 14:25 ` KAMEZAWA Hiroyuki
2007-10-04 11:56 ` Shi Weihua
2007-10-04 12:17 ` KAMEZAWA Hiroyuki
2007-10-04 12:33 ` Shi Weihua [this message]
2007-10-04 12:47 ` KAMEZAWA Hiroyuki
[not found] <474CF7D5.6010702@cn.fujitsu.com>
2007-11-28 6:07 ` Fw: " Shi Weihua
2007-12-04 13:02 ` Ingo Molnar
2007-12-04 21:52 ` Roland McGrath
2007-12-04 21:57 ` Ingo Molnar
2007-12-05 5:22 ` Shi Weihua
2007-12-05 5:36 ` Roland McGrath
[not found] <20071126143317.dd884128.akpm@linux-foundation.org>
[not found] ` <20071126230242.GA9623@elte.hu>
2007-11-27 3:02 ` Fw: " Roland McGrath
2007-11-27 22:57 ` Arjan van de Ven
-- strict thread matches above, loose matches on Subject: below --
2007-10-04 13:08 Mikael Pettersson
2007-10-05 0:55 ` Shi Weihua
2007-10-03 12:20 Mikael Pettersson
2007-10-03 12:40 ` KAMEZAWA Hiroyuki
2007-10-03 13:20 ` KAMEZAWA Hiroyuki
2007-10-04 11:02 ` Shi Weihua
2007-10-03 8:06 Shi Weihua
2007-11-19 2:15 ` Shi Weihua
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