linux-kernel - Re: [PATCH v4] sysfs: fix kobject refcount to address races with kobject removal

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Message-ID: <20210625215558.xn4a24ts26bdyfzo@garbanzo>
Date:   Fri, 25 Jun 2021 14:55:58 -0700
From:   Luis Chamberlain <mcgrof@...nel.org>
To:     Greg KH <gregkh@...uxfoundation.org>
Cc:     rafael@...nel.org, davem@...emloft.net, kuba@...nel.org,
        ast@...nel.org, andriin@...com, daniel@...earbox.net,
        atenart@...nel.org, alobakin@...me, weiwan@...gle.com,
        ap420073@...il.com, jeyu@...nel.org, ngupta@...are.org,
        sergey.senozhatsky.work@...il.com, minchan@...nel.org,
        axboe@...nel.dk, mbenes@...e.com, jpoimboe@...hat.com,
        tglx@...utronix.de, keescook@...omium.org, jikos@...nel.org,
        rostedt@...dmis.org, peterz@...radead.org,
        linux-block@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4] sysfs: fix kobject refcount to address races with
 kobject removal

On Thu, Jun 24, 2021 at 01:09:03PM +0200, Greg KH wrote:
> thanks for making this change and sticking with it!
> 
> Oh, and with this change, does your modprobe/rmmod crazy test now work?

It does but I wrote a test_syfs driver and I believe I see an issue with
this. I'll debug a bit more and see what it was, and I'll then also use
the driver to demo the issue more clearly, and then verification can be
an easy selftest test.

  Luis