linux-kernel - Re: [PATCH v0 4/6] nvme-fabrics: introduce ref counting for nvmf_ctrl

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Message-ID: <20240216095013.GD19961@lst.de>
Date: Fri, 16 Feb 2024 10:50:13 +0100
From: Christoph Hellwig <hch@....de>
To: Daniel Wagner <dwagner@...e.de>
Cc: James Smart <james.smart@...adcom.com>, Keith Busch <kbusch@...nel.org>,
	Christoph Hellwig <hch@....de>, Sagi Grimberg <sagi@...mberg.me>,
	Hannes Reinecke <hare@...e.de>, linux-nvme@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v0 4/6] nvme-fabrics: introduce ref counting for
 nvmf_ctrl_options

On Fri, Feb 16, 2024 at 09:45:24AM +0100, Daniel Wagner wrote:
> The FC transport is offloading the connect attempt to a workqueue. When
> the attempt fails the transport is starting to cleanup resources. It is
> possible for user space to trigger a crash because nvmf_ctrl_options are
> exposed to sysfs.

Eww.  I think the async offload is the real problem here..