From: Oliver Neukum <oliver@neukum.org>
To: Ondrej Zary <linux@rainbow-software.org>
Cc: Alan Stern <stern@rowland.harvard.edu>,
linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: debugging oops after disconnecting Nexio USB touchscreen
Date: Wed, 2 Dec 2009 10:42:04 +0100 [thread overview]
Message-ID: <200912021042.04557.oliver@neukum.org> (raw)
In-Reply-To: <200912020952.09354.linux@rainbow-software.org>
Am Mittwoch, 2. Dezember 2009 09:52:08 schrieb Ondrej Zary:
> It shows "prev is NULL, qh=f6581080, ehci->async=f6581000".
>
> The problem is that activating usbmon causes the problem to disappear. No
> errors in maybe 15 attempts. It appeared on 2nd attempt after unloading
> usbmon.
That suggests a use after free bug, which usbmon prevents holding
an additional reference.
Are you using SLAB_DEBUG?
Regards
Oliver
next prev parent reply other threads:[~2009-12-02 9:41 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-27 13:38 Ondrej Zary
2009-11-27 18:19 ` Alan Stern
2009-11-30 15:30 ` Ondrej Zary
2009-11-30 20:19 ` Alan Stern
2009-12-01 10:06 ` Ondrej Zary
2009-12-01 15:11 ` Alan Stern
2009-12-02 8:52 ` Ondrej Zary
2009-12-02 9:42 ` Oliver Neukum [this message]
2009-12-03 9:30 ` Ondrej Zary
2009-12-02 15:58 ` Alan Stern
2009-12-03 12:31 ` Ondrej Zary
2009-12-03 19:39 ` Alan Stern
2009-12-03 20:55 ` Ondrej Zary
2009-12-03 22:22 ` Alan Stern
2009-12-04 12:22 ` Ondrej Zary
2009-12-04 15:47 ` Alan Stern
2009-12-04 19:17 ` Ondrej Zary
2009-12-04 19:34 ` Alan Stern
2009-12-04 19:55 ` Ondrej Zary
2009-12-04 21:24 ` Alan Stern
2009-12-07 9:02 ` Ondrej Zary
2009-12-07 15:22 ` Alan Stern
2009-12-08 9:03 ` Ondrej Zary
2009-12-08 15:03 ` Alan Stern
2009-12-08 15:21 ` Ondrej Zary
2009-12-07 15:07 ` Ondrej Zary
2009-12-07 16:02 ` Alan Stern
2009-12-10 15:40 ` Ondrej Zary
2009-12-10 20:38 ` Alan Stern
2009-12-11 19:42 ` Ondrej Zary
2009-12-11 20:49 ` Alan Stern
2009-12-05 7:36 ` Andreas Mohr
2009-12-05 17:16 ` Alan Stern
2009-12-06 11:38 ` Andreas Mohr
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