Date: Thu, 2 Jul 2009 16:28:43 -0700
From: Greg KH <greg@kroah.com>
To: Krzysztof Halasa <khc@pm.waw.pl>
Cc: linux-kernel@vger.kernel.org
Subject: Re: 2.6.30 PL2303 USB-serial: NULL ptr dereference
Message-ID: <20090702232843.GA7865@kroah.com>
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On Thu, Jul 02, 2009 at 10:52:48PM +0200, Krzysztof Halasa wrote:
> Hi,
> 
> Not sure if the following has been reported. I think happened when
> closing minicom, with the PL2303-based adapter still connected to USB.
> 
> usb 6-1: new full speed USB device using uhci_hcd and address 2
> usb 6-1: configuration #1 chosen from 1 choice
> usbcore: registered new interface driver usbserial
> usbserial: USB Serial Driver core
> USB Serial support registered for pl2303
> pl2303 6-1:1.0: pl2303 converter detected
> usb 6-1: pl2303 converter now attached to ttyUSB0
> usbcore: registered new interface driver pl2303
> pl2303: Prolific PL2303 USB to serial adaptor driver
> hub 6-0:1.0: port 1 disabled by hub (EMI?), re-enabling...
> usb 6-1: USB disconnect, address 2
> pl2303 ttyUSB0: pl2303 converter now disconnected from ttyUSB0
> pl2303 6-1:1.0: device disconnected
> usb 6-1: new full speed USB device using uhci_hcd and address 3
> usb 6-1: configuration #1 chosen from 1 choice
> pl2303 6-1:1.0: pl2303 converter detected
> usb 6-1: pl2303 converter now attached to ttyUSB1
> hub 6-0:1.0: port 1 disabled by hub (EMI?), re-enabling...
> usb 6-1: USB disconnect, address 3
> pl2303 ttyUSB1: pl2303 converter now disconnected from ttyUSB1
> pl2303 6-1:1.0: device disconnected
> usb 6-1: new full speed USB device using uhci_hcd and address 4
> usb 6-1: configuration #1 chosen from 1 choice
> pl2303 6-1:1.0: pl2303 converter detected
> usb 6-1: pl2303 converter now attached to ttyUSB2
> 
> Then after two hours, while exiting from minicom (most probably):
> 
> BUG: unable to handle kernel NULL pointer dereference at (null)

This will be fixed in the 2.6.30.1 release in a few hours.

thanks,

greg k-h
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