linux-kernel - RE: [PATCH] scsi: storvsc: Add validation for untrusted Hyper-V values

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Date:   Mon, 6 Jul 2020 16:28:59 +0000
From:   Michael Kelley <mikelley@...rosoft.com>
To:     Andres Beltran <lkmlabelt@...il.com>,
        KY Srinivasan <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        "wei.liu@...nel.org" <wei.liu@...nel.org>
CC:     "linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "parri.andrea@...il.com" <parri.andrea@...il.com>,
        Saruhan Karademir <skarade@...rosoft.com>,
        "James E . J . Bottomley" <jejb@...ux.ibm.com>,
        "Martin K . Petersen" <martin.petersen@...cle.com>,
        "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>
Subject: RE: [PATCH] scsi: storvsc: Add validation for untrusted Hyper-V
 values

From: Andres Beltran <lkmlabelt@...il.com> Sent: Monday, July 6, 2020 9:09 AM
> 
> For additional robustness in the face of Hyper-V errors or malicious
> behavior, validate all values that originate from packets that
> Hyper-V has sent to the guest. Ensure that invalid values cannot
> cause data being copied out of the bounds of the source buffer
> when calling memcpy. Ensure that outgoing packets do not have any
> leftover guest memory that has not been zeroed out.
> 
> Cc: James E.J. Bottomley <jejb@...ux.ibm.com>
> Cc: Martin K. Petersen <martin.petersen@...cle.com>
> Cc: linux-scsi@...r.kernel.org
> Signed-off-by: Andres Beltran <lkmlabelt@...il.com>
> ---
>  drivers/scsi/storvsc_drv.c | 11 +++++++++++
>  1 file changed, 11 insertions(+)
> 

Reviewed-by: Michael Kelley <mikelley@...rosoft.com>