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Re: usb/gadget: another GPF in usb_gadget_unregister_driver

From Alan Stern <stern@rowland.harvard.edu>
Newsgroups linux.kernel
Subject Re: usb/gadget: another GPF in usb_gadget_unregister_driver
Date 2017-06-07 16:50 +0200
Message-ID <tPKrv-7Vi-1@gated-at.bofh.it> (permalink)
References <tPJlL-7eC-1@gated-at.bofh.it>
Organization linux.* mail to news gateway

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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

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Thread

usb/gadget: another GPF in usb_gadget_unregister_driver Andrey Konovalov <andreyknvl@google.com> - 2017-06-07 15:40 +0200
  Re: usb/gadget: another GPF in usb_gadget_unregister_driver Alan Stern <stern@rowland.harvard.edu> - 2017-06-07 16:50 +0200
    Re: usb/gadget: another GPF in usb_gadget_unregister_driver Andrey Konovalov <andreyknvl@google.com> - 2017-06-07 17:20 +0200
      Re: usb/gadget: another GPF in usb_gadget_unregister_driver Alan Stern <stern@rowland.harvard.edu> - 2017-06-07 23:30 +0200
        Re: usb/gadget: another GPF in usb_gadget_unregister_driver Andrey Konovalov <andreyknvl@google.com> - 2017-06-08 13:50 +0200
          Re: usb/gadget: another GPF in usb_gadget_unregister_driver Alan Stern <stern@rowland.harvard.edu> - 2017-06-08 18:00 +0200
            Re: usb/gadget: another GPF in usb_gadget_unregister_driver Andrey Konovalov <andreyknvl@google.com> - 2017-06-08 18:40 +0200

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