linux-kernel - Re: [PATCH v6 4/4] usb: gadget: uvc: Fix use-after-free for inflight usb

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Message-ID: <738df245-e7d1-4fc0-9076-3ac5afebaa44@google.com>
Date:   Thu, 19 Oct 2023 15:30:00 -0700
From:   Avichal Rakesh <arakesh@...gle.com>
To:     gregkh@...uxfoundation.org
Cc:     etalvala@...gle.com, jchowdhary@...gle.com,
        linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
        dan.scally@...asonboard.com, laurent.pinchart@...asonboard.com,
        m.grzeschik@...gutronix.de
Subject: Re: [PATCH v6 4/4] usb: gadget: uvc: Fix use-after-free for inflight
 usb_requests



On 10/19/23 13:32, kernel test robot wrote:
> Hi Avichal,
> 
> kernel test robot noticed the following build warnings:
> 
> [auto build test WARNING on usb/usb-testing]
> [also build test WARNING on usb/usb-next usb/usb-linus linus/master v6.6-rc6 next-20231019]
> [If your patch is applied to the wrong git tree, kindly drop us a note.
> And when submitting patch, we suggest to use '--base' as documented in
> https://git-scm.com/docs/git-format-patch#_base_tree_information]
> 
> url:    https://github.com/intel-lab-lkp/linux/commits/Avichal-Rakesh/usb-gadget-uvc-prevent-use-of-disabled-endpoint/20231020-025512
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing
> patch link:    https://lore.kernel.org/r/20231019185319.2714000-5-arakesh%40google.com
> patch subject: [PATCH v6 4/4] usb: gadget: uvc: Fix use-after-free for inflight usb_requests
> config: m68k-allyesconfig (https://download.01.org/0day-ci/archive/20231020/202310200457.GwPPFuHX-lkp@intel.com/config)
> compiler: m68k-linux-gcc (GCC) 13.2.0
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231020/202310200457.GwPPFuHX-lkp@intel.com/reproduce)
> 
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <lkp@...el.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202310200457.GwPPFuHX-lkp@intel.com/
> 
> All warnings (new ones prefixed by >>):
> 
>>> drivers/usb/gadget/function/uvc_video.c:231: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
>     * Must be called with req_lock held as it modifies the list ureq is held in
> 
> 

Greg, apologies for the newb question: do you want me to upload
the fix for this as a reply to [PATCH v6 4/4], or upload a new chain of 
v7s with this patch fixed? 

I am not familiar with the kernel merging process, so not sure 
which one would work better for you to pick up.

Regards,
Avi