From: Michael Kelley <mikelley@microsoft.com>
To: Andres Beltran <t-mabelt@microsoft.com>,
KY Srinivasan <kys@microsoft.com>,
Haiyang Zhang <haiyangz@microsoft.com>,
Stephen Hemminger <sthemmin@microsoft.com>,
"wei.liu@kernel.org" <wei.liu@kernel.org>
Cc: "linux-hyperv@vger.kernel.org" <linux-hyperv@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"parri.andrea@gmail.com" <parri.andrea@gmail.com>
Subject: RE: [PATCH v4 1/3] Drivers: hv: vmbus: Add vmbus_requestor data structure for VMBus hardening
Date: Mon, 6 Jul 2020 16:28:13 +0000 [thread overview]
Message-ID: <MW2PR2101MB105242B7566BDBB86D58D825D7690@MW2PR2101MB1052.namprd21.prod.outlook.com> (raw)
In-Reply-To: <20200701001221.2540-2-lkmlabelt@gmail.com>
From: Andres Beltran <lkmlabelt@gmail.com> Sent: Tuesday, June 30, 2020 5:12 PM
>
> 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.
>
> Signed-off-by: Andres Beltran <lkmlabelt@gmail.com>
> ---
> Changes in v4:
> - Use channel->rqstor_size to check if rqstor has been
> initialized.
> Changes in v3:
> - Check that requestor has been initialized in
> vmbus_next_request_id() and vmbus_request_addr().
> Changes in v2:
> - Get rid of "rqstor" variable in __vmbus_open().
>
> drivers/hv/channel.c | 158 +++++++++++++++++++++++++++++++++++++++++
> include/linux/hyperv.h | 21 ++++++
> 2 files changed, 179 insertions(+)
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
next prev parent reply other threads:[~2020-07-06 16:28 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-01 0:12 [PATCH v4 0/3] Drivers: hv: vmbus: vmbus_requestor data structure for VMBus hardening Andres Beltran
2020-07-01 0:12 ` [PATCH v4 1/3] Drivers: hv: vmbus: Add " Andres Beltran
2020-07-06 16:28 ` Michael Kelley [this message]
2020-07-01 0:12 ` [PATCH v4 2/3] scsi: storvsc: Use vmbus_requestor to generate transaction IDs " Andres Beltran
2020-07-01 16:53 ` Wei Liu
2020-07-02 2:10 ` Martin K. Petersen
2020-07-07 23:47 ` Nathan Chancellor
2020-07-08 9:21 ` Wei Liu
2020-07-08 9:25 ` Wei Liu
2020-07-17 10:45 ` Wei Liu
2020-07-17 13:54 ` Michael Kelley
2020-07-01 0:12 ` [PATCH v4 3/3] hv_netvsc: " Andres Beltran
2020-07-02 15:50 ` [PATCH v4 0/3] Drivers: hv: vmbus: vmbus_requestor data structure " Andrea Parri
2020-07-06 17:11 ` Wei Liu
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