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From: =?utf-8?Q?Bj=C3=B8rn_Mork?= <bjorn@mork.no>
To: Liu Bo <liub.liubo@gmail.com>
Cc: linux-usb@vger.kernel.org, LKML <linux-kernel@vger.kernel.org>
Subject: Re: [BUG Report] BUG: unable to handle kernel NULL pointer dereference at
Organization: m
References: <5028C4CC.9070301@gmail.com>
Date: Mon, 13 Aug 2012 12:01:24 +0200
In-Reply-To: <5028C4CC.9070301@gmail.com> (Liu Bo's message of "Mon, 13 Aug
	2012 17:11:40 +0800")
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Liu Bo <liub.liubo@gmail.com> writes:

> I'm using mainline upstream 3.6.0-rc1 compiled based on Fedora-16.
>
> When I unplug my mobile usb card, I hit this:
>
> [  247.017258] BUG: unable to handle kernel NULL pointer dereference at           (null)
> [  247.017378] IP: [<ffffffffa03bf27f>] stop_read_write_urbs+0x3f/0x90 [usb_wwan]

Thanks for reporting.  This should be fixed by

 a1028f0 usb: usb_wwan: replace release and disconnect with a port_remove hook

currently in the usb tree, and hopefully going into the next -rc



Bjørn
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