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Date:   Wed, 19 Jan 2022 09:25:40 +0100
From:   Greg KH <gregkh@linuxfoundation.org>
To:     "ckamas dslextreme.com" <ckamas@dslextreme.com>
Cc:     linux-usb@vger.kernel.org
Subject: Re: Debugging crash in kernel module usbip-host
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On Tue, Jan 18, 2022 at 06:48:47PM -0500, ckamas dslextreme.com wrote:
> Greg,
> 
> Thanks for the feedback. I will update the kernel to 5.16 and verify the crash there too.
> 
> In the meantime, can you point me to where I can learn more about how these "stub" functions are generated?
> 
> Thanks,
> Chuck
> 
> 
> 
>  0) + 14.167 us   |  stub_complete [usbip_host]();
>  ------------------------------------------
>  0)    <idle>-0    =>  stub_tx-300  
>  ------------------------------------------
> 
>  0)               |    stub_send_ret_submit [usbip_host]() {
>  0)   6.250 us    |      stub_free_priv_and_urb [usbip_host]();
>  0) ! 130.781 us  |    }
>  0)   7.135 us    |    stub_send_ret_unlink [usbip_host]();

These are functions in the drivers/usb/usbip/stub_rx.c file.