From: Andrew Morton <akpm@osdl.org>
To: Keith Owens <kaos@sgi.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: 2.6.13-rc4 use after free in class_device_attr_show
Date: Mon, 1 Aug 2005 12:03:21 -0700 [thread overview]
Message-ID: <20050801120321.230349c5.akpm@osdl.org> (raw)
In-Reply-To: <8551.1122898445@ocs3.ocs.com.au>
Keith Owens <kaos@sgi.com> wrote:
>
> On Sat, 30 Jul 2005 02:29:55 -0700,
> Andrew Morton <akpm@osdl.org> wrote:
> >Keith Owens <kaos@sgi.com> wrote:
> >>
> >> 2.6.13-rc4 + kdb, with lots of CONFIG_DEBUG options. There is an
> >> intermittent use after free in class_device_attr_show. Reboot with no
> >> changes and the problem does not always recur.
> >> ...
> >> ip is at class_device_attr_show+0x50/0xa0
> >> ...
> >
> >It might help to know which file is being read from here.
> >
> >The below patch will record the name of the most-recently-opened sysfs
> >file. You can print last_sysfs_file[] in the debugger or add the
> >appropriate printk to the ia64 code?
>
> No need for a patch. It is /dev/vcsa2.
You mean /sys/class/vc/vcsa2?
That appears to be using generic code...
Can you please summarise what you curently know about this bug? What is
being accessed after free in class_device_attr_show()? class_dev_attr?
cd?
next prev parent reply other threads:[~2005-08-01 19:01 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-30 5:47 Keith Owens
2005-07-30 9:29 ` Andrew Morton
2005-08-01 12:14 ` Keith Owens
2005-08-01 14:03 ` Keith Owens
2005-08-01 19:03 ` Andrew Morton [this message]
2005-08-02 3:05 ` Keith Owens
2005-08-02 3:32 ` Keith Owens
2005-08-02 8:04 ` Maneesh Soni
2005-08-02 17:33 ` Greg KH
2005-08-10 6:26 ` Keith Owens
2005-08-10 10:06 ` Maneesh Soni
2005-08-10 22:35 ` Greg KH
2005-08-11 5:34 ` Maneesh Soni
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