linux-kernel - Re: Manual unbind of ATA devices causes use-after-free

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Message-ID: <20171113201037.GL983427@devbig577.frc2.facebook.com>
Date:   Mon, 13 Nov 2017 12:10:37 -0800
From:   Tejun Heo <tj@...nel.org>
To:     Taras Kondratiuk <takondra@...co.com>
Cc:     linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org,
        xe-linux-external@...co.com, Lin Ming <minggr@...il.com>
Subject: Re: Manual unbind of ATA devices causes use-after-free

Hello,

On Mon, Nov 13, 2017 at 12:09:27PM -0800, Taras Kondratiuk wrote:
> > cc'ing Lin.  Lin, can you take a look at this?
> 
> I'm ready to test whenever you have something. If you don't have time to
> look at this then can you recommend a proper way to fix it. Is it better
> to change device hierarchy back to previous state (revert 9a6d6a2ddabb)
> or add reference counting to ata_host?

We'll have to add refcnting to ata_host.

Thanks.

-- 
tejun