Re: Possible race in 4.14 xhci stack

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