linux-kernel - Re: [PATCH] nvme: disallow passthru cmd from targeting a nsid != nsid of the block dev

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Date:   Thu, 25 Mar 2021 17:30:28 +0100
From:   Christoph Hellwig <hch@....de>
To:     Niklas Cassel <Niklas.Cassel@....com>
Cc:     Keith Busch <kbusch@...nel.org>, Jens Axboe <axboe@...com>,
        Christoph Hellwig <hch@....de>,
        Sagi Grimberg <sagi@...mberg.me>,
        "minwoo.im.dev@...il.com" <minwoo.im.dev@...il.com>,
        "javier@...igon.com" <javier@...igon.com>,
        "linux-nvme@...ts.infradead.org" <linux-nvme@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] nvme: disallow passthru cmd from targeting a nsid !=
 nsid of the block dev

On Thu, Mar 25, 2021 at 09:48:37AM +0000, Niklas Cassel wrote:
> @@ -1632,6 +1632,8 @@ static int nvme_user_cmd(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
>  		return -EFAULT;
>  	if (cmd.flags)
>  		return -EINVAL;
> +	if (ns && cmd.nsid != ns->head->ns_id)
> +		return -EINVAL;

Shouldn't we log something to the kernel log including the device
and current->comm?