linux-kernel - Re: [PATCH] brd: fix uninitialized use of brd->dax

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Message-ID: <CAPcyv4hFcTLtTnMYXHnnijX0o8TG=r+cDXH4TBEuXJT+j8ebiw@mail.gmail.com>
Date:   Wed, 3 May 2017 11:44:16 -0700
From:   Dan Williams <dan.j.williams@...el.com>
To:     Gerald Schaefer <gerald.schaefer@...ibm.com>
Cc:     Jens Axboe <axboe@...nel.dk>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        linux-block@...r.kernel.org
Subject: Re: [PATCH] brd: fix uninitialized use of brd->dax_dev

On Wed, May 3, 2017 at 5:56 AM, Gerald Schaefer
<gerald.schaefer@...ibm.com> wrote:
> commit 1647b9b9 "brd: add dax_operations support" introduced the allocation
> and freeing of a dax_device, but the allocated dax_device is not stored
> into the brd_device, so brd_del_one() will eventually operate on an
> uninitialized brd->dax_dev.
>
> Fix this by storing the allocated dax_device to brd->dax_dev.
>
> Signed-off-by: Gerald Schaefer <gerald.schaefer@...ibm.com>

Thanks Gerald, I added this to the dax_device conversion for 4.12.