Re: [PATCH] USB: cdc-wdm: Call wake_up_all() when clearing WDM_IN_USE bit.

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Am Freitag, den 22.05.2020, 17:26 +0900 schrieb Tetsuo Handa:
> On 2020/05/22 17:04, Oliver Neukum wrote:
> > May I ask you to redo the patch with comments added stating
> > that the wake up is done for the sake of wdm_flush(), change
> > the description and add the link to syzkaller?
> 
> You can take over this patch. syzbot tried this patch on 2020/02/11 01:23 at
> https://syzkaller.appspot.com/bug?id=e7b761593b23eb50855b9ea31e3be5472b711186 ,
> but this patch did not solve the problem syzbot has found. Thus, I don't add
> a link to syzkaller...

Hi,

this is odd. I looked at the driver and it looks to me like
pre/post_reset() is the only other place that touches WDM_IN_USE.
And it does so correctly. Any idea what could be wrong?

	Regards
		Oliver




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