linux-kernel - Re: [PATCH v4] driver core: Fix use-after-free and double free on glue directory

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Message-ID: <20190618161340.GA13983@kroah.com>
Date:   Tue, 18 Jun 2019 18:13:40 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Muchun Song <smuchun@...il.com>
Cc:     "Rafael J. Wysocki" <rafael@...nel.org>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Prateek Sood <prsood@...eaurora.org>,
        Mukesh Ojha <mojha@...eaurora.org>, gkohli@...eaurora.org,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        zhaowuyun@...gtech.com
Subject: Re: [PATCH v4] driver core: Fix use-after-free and double free on
 glue directory

On Wed, Jun 19, 2019 at 12:09:40AM +0800, Muchun Song wrote:
> Greg KH <gregkh@...uxfoundation.org> 于2019年6月18日周二 下午11:29写道：
> >
> > On Tue, Jun 18, 2019 at 09:40:13PM +0800, Muchun Song wrote:
> > > Ping guys ? I think this is worth fixing.
> >
> > That's great (no context here), but I need people to actually agree on
> > what the correct fix should be.  I had two different patches that were
> > saying they fixed the same issue, and that feels really wrong.
> 
> Another patch:
>     Subject: [PATCH v3] drivers: core: Remove glue dirs early only
> when refcount is 1
> 
> My first v1 patch:
>     Subject: [PATCH] driver core: Fix use-after-free and double free
> on glue directory
> 
> The above two patches are almost the same that fix is based on the refcount.
> But why we change the solution from v1 to v4? Some discussion can
> refer to the mail:
> 
>     Subject: [PATCH] driver core: Fix use-after-free and double free
> on glue directory

Again, I am totally confused and do not see a patch in an email that I
can apply...

Someone needs to get people to agree here...

thanks,

greg k-h