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Date:   Tue, 20 Jul 2021 18:11:10 +0200
From:   Greg KH <gregkh@linuxfoundation.org>
To:     "Schmid, Carsten" <Carsten_Schmid@mentor.com>
Cc:     Mathias Nyman <mathias.nyman@linux.intel.com>,
        USB list <linux-usb@vger.kernel.org>
Subject: Re: Possible race in 4.14 xhci stack
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On Tue, Jul 20, 2021 at 03:04:44PM +0000, Schmid, Carsten wrote:
> Hi Mathias,
> 
> i got a NULL pointer deref in the usbfs and analyzed it.
> The connected device seemed to have trouble on USB transmissions.
> However, I have the impression that there is a race between finishing URB handling and disconnection of devices.
> In detail:
> [ 4979.029666] xhci_hcd 0000:00:15.0: USB transfer error. Maybe the USB cable is bad?

Did your cable die?

And 4.14 is quite old, what about 5.13?

thanks,

greg k-h