On Mon, Jun 29, 2020 at 09:33:15PM +0000, Haiyang Zhang wrote:

quoted

-----Original Message-----
From: Andres Beltran <redacted>
Sent: Monday, June 29, 2020 4:02 PM
To: KY Srinivasan <kys@microsoft.com>; Haiyang Zhang
[off-list ref]; Stephen Hemminger [off-list ref];
wei.liu@kernel.org
Cc: linux-hyperv@vger.kernel.org; linux-kernel@vger.kernel.org; Michael
Kelley [off-list ref]; parri.andrea@gmail.com; Andres Beltran
[off-list ref]; David S . Miller [off-list ref]; Jakub
Kicinski [off-list ref]; netdev@vger.kernel.org
Subject: [PATCH v2 3/3] hv_netvsc: Use vmbus_requestor to generate
transaction IDs for VMBus hardening

Currently, pointers to guest memory are passed to Hyper-V as
transaction IDs in netvsc. In the face of errors or malicious
behavior in Hyper-V, netvsc 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.

Cc: David S. Miller <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: netdev@vger.kernel.org
Signed-off-by: Andres Beltran <redacted>

Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com>

Thanks Haiyang for reviewing.

David and Jakub:

This patch depends on the first patch. I intend to pick up this patch
via hyperv.git. This makes life easier for all of us. Let me know if you
disagree.

Wei.