linux-kernel - Re: [PATCH v9 2/3] scsi: storvsc: Use vmbus_requestor to generate transaction IDs for VMBus hardening

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Message-ID: <20201113113327.dmium67e32iadqbz@liuwe-devbox-debian-v2>
Date:   Fri, 13 Nov 2020 11:33:27 +0000
From:   Wei Liu <wei.liu@...nel.org>
To:     "Andrea Parri (Microsoft)" <parri.andrea@...il.com>
Cc:     linux-kernel@...r.kernel.org,
        "K . Y . Srinivasan" <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Wei Liu <wei.liu@...nel.org>, linux-hyperv@...r.kernel.org,
        Andres Beltran <lkmlabelt@...il.com>,
        Michael Kelley <mikelley@...rosoft.com>,
        Saruhan Karademir <skarade@...rosoft.com>,
        Juan Vazquez <juvazq@...rosoft.com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        linux-scsi@...r.kernel.org
Subject: Re: [PATCH v9 2/3] scsi: storvsc: Use vmbus_requestor to generate
 transaction IDs for VMBus hardening

On Mon, Nov 09, 2020 at 11:04:01AM +0100, Andrea Parri (Microsoft) wrote:
> From: Andres Beltran <lkmlabelt@...il.com>
> 
> Currently, pointers to guest memory are passed to Hyper-V as
> transaction IDs in storvsc. In the face of errors or malicious
> behavior in Hyper-V, storvsc should not expose or trust the transaction
> IDs returned by Hyper-V to be valid guest memory addresses. Instead,
> use small integers generated by vmbus_requestor as requests
> (transaction) IDs.
> 
> Signed-off-by: Andres Beltran <lkmlabelt@...il.com>
> Co-developed-by: Andrea Parri (Microsoft) <parri.andrea@...il.com>
> Signed-off-by: Andrea Parri (Microsoft) <parri.andrea@...il.com>
> Reviewed-by: Michael Kelley <mikelley@...rosoft.com>
> Cc: "James E.J. Bottomley" <jejb@...ux.ibm.com>
> Cc: "Martin K. Petersen" <martin.petersen@...cle.com>
> Cc: linux-scsi@...r.kernel.org

Reviewed-by: Wei Liu <wl@....org>