From: Petr Tesarik <ptesarik@suse.cz>
To: linux-ia64@vger.kernel.org
Subject: Re: [PATCH] ptrace RSE bug
Date: Wed, 17 Oct 2007 19:48:47 +0000 [thread overview]
Message-ID: <4716671F.8020201@suse.cz> (raw)
In-Reply-To: <1188357710.22637.7.camel@sli10-conroe.sh.intel.com>
Petr Tesarik wrote:
>[...]
> 4. While talking about RNAT, does the RBS syncing back and forth
> handle correctly the case when part of the RNAT stored in the backing
> store belongs to the kernel registers? It must not be possible to change
> the NAT bits for kernel registers from userspace!
>
> Maybe it's not an issue, because I tried to actually exploit this
> bug, and my attempts failed.
I've just verified that put_rnat() does the right thing here (even
prevents setting NaT for syscall arguments), so modifying RNAT bits is
no problem. The other things still apply.
Regards,
Petr Tesarik
next prev parent reply other threads:[~2007-10-17 19:48 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-29 3:21 [PATCH] ptrace RSE bug Shaohua Li
2007-08-29 7:10 ` Roland McGrath
2007-08-29 7:29 ` Matthew Chapman
2007-08-29 8:01 ` Roland McGrath
2007-09-05 16:25 ` Petr Tesarik
2007-09-06 3:16 ` Shaohua Li
2007-09-06 13:59 ` Petr Tesarik
2007-09-07 1:02 ` Shaohua Li
2007-09-07 8:26 ` Petr Tesarik
2007-09-07 15:11 ` David Mosberger-Tang
2007-09-11 8:39 ` Shaohua Li
2007-10-17 14:56 ` Petr Tesarik
2007-10-17 19:48 ` Petr Tesarik [this message]
2007-10-17 19:55 ` Petr Tesarik
2007-10-18 1:54 ` Shaohua Li
2007-10-18 10:59 ` Petr Tesarik
2007-10-18 16:02 ` Christoph Hellwig
2007-10-19 7:30 ` Shaohua Li
2007-10-19 19:42 ` Petr Tesarik
2007-10-24 3:34 ` Shaohua Li
2007-10-24 23:38 ` Luck, Tony
2007-10-25 0:38 ` Shaohua Li
2007-11-12 2:14 ` Roland McGrath
2007-11-12 15:41 ` Petr Tesarik
2007-11-12 16:11 ` Petr Tesarik
2007-11-13 0:30 ` Roland McGrath
2007-11-13 11:07 ` Petr Tesarik
2007-11-14 5:38 ` Shaohua Li
2007-11-14 6:47 ` Roland McGrath
2007-11-14 7:37 ` Petr Tesarik
2007-11-14 7:40 ` Roland McGrath
2007-11-14 7:53 ` Petr Tesarik
2007-11-14 7:55 ` Petr Tesarik
2007-11-14 11:09 ` Roland McGrath
2007-11-16 20:05 ` Petr Tesarik
2007-11-18 3:08 ` Roland McGrath
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