linux-kernel - Re: [PATCH] USB: gadget: udc: atmel: fix possible oops when unloading module

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 26 Dec 2014 09:27:07 -0600
From:	Felipe Balbi <balbi@...com>
To:	"Wu, Songjun" <songjun.wu@...el.com>
CC:	<balbi@...com>, <gregkh@...uxfoundation.org>,
	<linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<nicolas.ferre@...el.com>, <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH] USB: gadget: udc: atmel: fix possible oops when
 unloading module

Hi,

On Wed, Dec 24, 2014 at 09:14:53AM +0800, Wu, Songjun wrote:
> 
> 在 12/24/2014 00:24, Felipe Balbi 写道:
> >On Mon, Dec 22, 2014 at 05:26:14PM +0800, Songjun Wu wrote:
> >>When unloading the module, the urb request will be dequeued
> >>and the completion routine will be excuted.
> >>If no urb packet, the urb request will not be added to the endpoint queue
> >>and the completion routine pointer in urb request is NULL.
> >>Accessing to the NULL function pointer will cause the oops issue.
> >>Add the code to check the urb request is in the endpoint queue or not.
> >>If the urb request is not in the endpoint queue, a negative error code
> >>will be returned.
> >
> >have you triggered the NULL pointer oops ? Care to add it to the commit
> >log.
> 
> Executing the 'insmod g_hid.ko', then executing the 'rmmod g_hid.ko', the
> NULL pointer oops will be triggered.

what about all my other queries below and what about adding the oops
dump to commit log ?

> >Also, which commit is this fixing ? Does this need to be backported ?
> >When was the bug introduced ?

-- 
balbi

Download attachment "signature.asc" of type "application/pgp-signature" (820 bytes)