Linux-HyperV Archive on lore.kernel.org
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From: Stephen Hemminger <stephen@networkplumber.org>
To: Andres Beltran <lkmlabelt@gmail.com>
Cc: t-mabelt@microsoft.com, kys@microsoft.com,
	haiyangz@microsoft.com, sthemmin@microsoft.com,
	wei.liu@kernel.org, linux-hyperv@vger.kernel.org,
	linux-kernel@vger.kernel.org, mikelley@microsoft.com,
	parri.andrea@gmail.com, skarade@microsoft.com,
	linux-scsi@vger.kernel.org, netdev@vger.kernel.org,
	"James E . J . Bottomley" <jejb@linux.ibm.com>,
	"Martin K . Petersen" <martin.petersen@oracle.com>,
	"David S . Miller" <davem@davemloft.net>
Subject: Re: [PATCH v3 0/3] Drivers: hv: vmbus: vmbus_requestor data structure for VMBus hardening
Date: Tue, 30 Jun 2020 10:16:21 -0700
Message-ID: <20200630101621.0f4d9dba@hermes.lan> (raw)
In-Reply-To: <20200630153200.1537105-1-lkmlabelt@gmail.com>

On Tue, 30 Jun 2020 11:31:57 -0400
Andres Beltran <lkmlabelt@gmail.com> 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
> 
> Tested-by: Andrea Parri <parri.andrea@gmail.com>
> 
> Cc: linux-scsi@vger.kernel.org
> Cc: netdev@vger.kernel.org
> Cc: James E.J. Bottomley <jejb@linux.ibm.com>
> Cc: Martin K. Petersen <martin.petersen@oracle.com>
> Cc: David S. Miller <davem@davemloft.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
> 
>  drivers/hv/channel.c              | 154 ++++++++++++++++++++++++++++++
>  drivers/net/hyperv/hyperv_net.h   |  13 +++
>  drivers/net/hyperv/netvsc.c       |  79 ++++++++++++---
>  drivers/net/hyperv/rndis_filter.c |   1 +
>  drivers/scsi/storvsc_drv.c        |  85 ++++++++++++++---
>  include/linux/hyperv.h            |  22 +++++
>  6 files changed, 329 insertions(+), 25 deletions(-)
> 

How does this interact with use of the vmbus in usermode by DPDK through hv_uio_generic?
Will it still work?

  parent reply index

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-30 15:31 Andres Beltran
2020-06-30 15:31 ` [PATCH v3 1/3] Drivers: hv: vmbus: Add " Andres Beltran
2020-06-30 18:24   ` Michael Kelley
2020-06-30 15:31 ` [PATCH v3 2/3] scsi: storvsc: Use vmbus_requestor to generate transaction IDs " Andres Beltran
2020-06-30 18:37   ` Michael Kelley
2020-06-30 15:32 ` [PATCH v3 3/3] hv_netvsc: " Andres Beltran
2020-06-30 17:12 ` [PATCH v3 0/3] Drivers: hv: vmbus: vmbus_requestor data structure " Andrea Parri
2020-06-30 17:16 ` Stephen Hemminger [this message]
2020-06-30 18:13   ` Michael Kelley

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