Re: usb/gadget: another GPF in usb_gadget_unregister_driver

[Alan Stern]

On Wed, 7 Jun 2017, Andrey Konovalov wrote:

> Hi,
> 
> I've got the following error report while fuzzing the kernel with syzkaller.
> 
> On commit b29794ec95c6856b316c2295904208bf11ffddd9 (4.12-rc4+).
> 
> This looks quite similar to
> https://groups.google.com/forum/#!topic/syzkaller/HDawLBeeORI

It does look very similar, but that problem was supposed to have been 
fixed by commit 7b0173811260 ("usb: gadget: udc: core: fix return code 
of usb_gadget_probe_driver()").

> I'm able to reproduce this, so I can collect some debug traces if needed.

Can you provide an strace or the equivalent?

Alan Stern