linux-kernel - Re: [PATCH] nvme: hwmon: fix crash on device teardown

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Message-ID: <BYAPR04MB4965A005E5CED1890293ED7A86CB0@BYAPR04MB4965.namprd04.prod.outlook.com>
Date:   Thu, 10 Dec 2020 04:35:14 +0000
From:   Chaitanya Kulkarni <Chaitanya.Kulkarni@....com>
To:     Enzo Matsumiya <ematsumiya@...e.de>,
        "linux-nvme@...ts.infradead.org" <linux-nvme@...ts.infradead.org>
CC:     Sagi Grimberg <sagi@...mberg.me>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Jens Axboe <axboe@...com>, Keith Busch <kbusch@...nel.org>,
        Christoph Hellwig <hch@....de>
Subject: Re: [PATCH] nvme: hwmon: fix crash on device teardown

Enzo,
On 12/9/20 13:39, Enzo Matsumiya wrote:
> Fix a possible NULL pointer dereference when trying to read
> hwmon sysfs entries associated to NVMe-oF devices that were
> hot-removed or disconnected.
>
> Unregister the NVMe hwmon device upon controller teardown
> (nvme_stop_ctrl()).
>
> Signed-off-by: Enzo Matsumiya <ematsumiya@...e.de>
(Without looking into the code)

Do you have blktests testcases for NVMeOFhot-removed and disconnected
device scenario to produce the problem ?