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Date:   Thu, 18 Jun 2020 10:28:18 +0200
From:   Greg KH <gregkh@linuxfoundation.org>
To:     "Zhang, Qiang" <Qiang.Zhang@windriver.com>
Cc:     "balbi@kernel.org" <balbi@kernel.org>,
        "linux-usb@vger.kernel.org" <linux-usb@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: =?utf-8?B?5Zue5aSNOiDlm57lpI06IFtQQVRD?=
 =?utf-8?Q?H_v2=5D_usb=3A_gadget?= =?utf-8?Q?=3A?= function: printer: fix
 use-after-free in __lock_acquire
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On Wed, Jun 10, 2020 at 04:58:44AM +0000, Zhang, Qiang wrote:
> cdev  object reference count and "struct printer_dev" object
> reference count(kref), This two reference counts do not conflict.  in
> file usb-skeleton.c also used a similar method， "struct usb_skel"
> contains kref members.

I do not understand what you are referring to here, sorry.

greg k-h