linux-kernel - Re: [PATCH v4 0/3] Drivers: hv: vmbus: vmbus_requestor data structure for VMBus hardening

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Message-ID: <20200706171110.ti5cfhmaoufi3zt6@liuwe-devbox-debian-v2>
Date:   Mon, 6 Jul 2020 17:11:10 +0000
From:   Wei Liu <wei.liu@...nel.org>
To:     t-mabelt@...rosoft.com
Cc:     kys@...rosoft.com, haiyangz@...rosoft.com, sthemmin@...rosoft.com,
        wei.liu@...nel.org, linux-hyperv@...r.kernel.org,
        linux-kernel@...r.kernel.org, mikelley@...rosoft.com,
        parri.andrea@...il.com, Andres Beltran <lkmlabelt@...il.com>,
        "James E . J . Bottomley" <jejb@...ux.ibm.com>,
        "Martin K . Petersen" <martin.petersen@...cle.com>,
        "David S . Miller" <davem@...emloft.net>
Subject: Re: [PATCH v4 0/3] Drivers: hv: vmbus: vmbus_requestor data
 structure for VMBus hardening

On Tue, Jun 30, 2020 at 08:12:18PM -0400, Andres Beltran wrote:
> Currently, VMbus drivers use pointers into guest memory as request IDs
> for interactions with Hyper-V. To be more robust in the face of errors
> or malicious behavior from a compromised Hyper-V, avoid exposing
> guest memory addresses to Hyper-V. Also avoid Hyper-V giving back a
> bad request ID that is then treated as the address of a guest data
> structure with no validation. Instead, encapsulate these memory
> addresses and provide small integers as request IDs.
> 
> The first patch creates the definitions for the data structure, provides
> helper methods to generate new IDs and retrieve data, and
> allocates/frees the memory needed for vmbus_requestor.
> 
> The second and third patches make use of vmbus_requestor to send request
> IDs to Hyper-V in storvsc and netvsc respectively.
> 
> Thanks.
> Andres Beltran
> 
> Cc: James E.J. Bottomley <jejb@...ux.ibm.com>
> Cc: Martin K. Petersen <martin.petersen@...cle.com>
> Cc: David S. Miller <davem@...emloft.net>
> 
> Andres Beltran (3):
>   Drivers: hv: vmbus: Add vmbus_requestor data structure for VMBus
>     hardening
>   scsi: storvsc: Use vmbus_requestor to generate transaction IDs for
>     VMBus hardening
>   hv_netvsc: Use vmbus_requestor to generate transaction IDs for VMBus
>     hardening

Series applied to hyperv-next. Thanks.