Re: NULL pointer dereference in usb_ifnum_to_if

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On Wed, 8 Nov 2017, Philipp Kern wrote:

> > If the bad access occurred because the uvc driver tried to access a
> > device that had been removed 5 seconds earlier, the most likely
> > explanation is a reference-counting error of some sort.
> 
> That sounds reasonable. Is there a way to debug this? RTFM is a fine 
> response as well.

If the problem persists in a 4.13 or 4.14-rc kernel, you could try 
adding some debugging printk statements to the uvc driver.  Or you 
could ask the driver's maintainer for help.

Alan Stern

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