linux-kernel - Re: [PATCH v1 0/3] usb: gadget: uvc: stability fixes on STREAMOFF.

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Date:   Thu, 5 Oct 2023 11:09:14 -0700
From:   Avichal Rakesh <arakesh@...gle.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Michael Grzeschik <mgr@...gutronix.de>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Daniel Scally <dan.scally@...asonboard.com>,
        jchowdhary@...gle.com, etalvala@...gle.com,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 0/3] usb: gadget: uvc: stability fixes on STREAMOFF.



On 10/5/23 00:11, Greg Kroah-Hartman wrote:
> On Tue, Oct 03, 2023 at 04:16:00PM -0700, Avichal Rakesh wrote:
>> Thank you for testing the patch, Michael!
>>
>> On 10/3/23 04:09, Michael Grzeschik wrote:
>>> Hi
>>>
>>> On Sat, Sep 30, 2023 at 11:48:18AM -0700, Avichal Rakesh wrote:
>>>> We have been seeing two main stability issues that uvc gadget driver
>>>> runs into when stopping streams:
>>>> 1. Attempting to queue usb_requests to a disabled usb_ep
>>>> 2. use-after-free issue for inflight usb_requests
>>>>
>>>> The three patches below fix the two issues above. Patch 1/3 fixes the
>>>> first issue, and Patch 2/3 and 3/3 fix the second issue.
>>>>
>>>> Avichal Rakesh (3):
>>>>  usb: gadget: uvc: prevent use of disabled endpoint
>>>>  usb: gadget: uvc: Allocate uvc_requests one at a time
>>>>  usb: gadget: uvc: Fix use-after-free for inflight usb_requests
>>>>
>>>> drivers/usb/gadget/function/f_uvc.c     |  11 +-
>>>> drivers/usb/gadget/function/f_uvc.h     |   2 +-
>>>> drivers/usb/gadget/function/uvc.h       |   6 +-
>>>> drivers/usb/gadget/function/uvc_v4l2.c  |  21 ++-
>>>> drivers/usb/gadget/function/uvc_video.c | 189 +++++++++++++++++-------
>>>> 5 files changed, 164 insertions(+), 65 deletions(-)
>>>
>>> These patches are not applying on gregkh/usb-testing since
>>> Greg did take my patches first. I have already rebased them.
>>
>> Ah, I didn't realize Greg had picked up your changes in his tree.
>> Rebased the patches in V2.
> 
> The "v2" series here is almost impossible to follow, sorry.
> 
> Please send it as a new thread, not as responses to the individual
> commits, how am I supposed to pick them up that way?
> 
> And make it v3 please.

Sent out v3 as a new thread. Sorry about that!

- Avi.