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Date:   Fri, 30 Sep 2022 14:32:06 +0200
From:   Greg KH <gregkh@linuxfoundation.org>
To:     bugzilla-daemon@kernel.org
Cc:     linux-usb@vger.kernel.org
Subject: Re: [Bug 216543] kernel NULL pointer dereference
 usb_hcd_alloc_bandwidth
Message-ID: <Yzbhxt7/zFoRzdw3@kroah.com>
References: <bug-216543-208809@https.bugzilla.kernel.org/>
 <bug-216543-208809-9SJHQpIfGA@https.bugzilla.kernel.org/>
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On Fri, Sep 30, 2022 at 11:38:46AM +0000, bugzilla-daemon@kernel.org wrote:
> https://bugzilla.kernel.org/show_bug.cgi?id=216543
> 
> --- Comment #4 from Nazar Mokrynskyi (nazar@mokrynskyi.com) ---
> Created attachment 301906
>   --> https://bugzilla.kernel.org/attachment.cgi?id=301906&action=edit
> kernel log from first crash
> 
> Previously uploaded file is from second log snippet, this is the first one for
> completeness since stack traces are slightly different there.

The log file is full of warnings and other messages way before USB is
ever involved.  You might want to resolve those first.

Anyway, yes, the device disconnects itself from the USB bus which is an
electrical event and the video driver fails trying to send data to it,
and then things blow up again.  As there is a real solution for this
(fix the cable), I recommend doing that first :)

thanks,

greg k-h