From: Michael Kelley <mikelley@microsoft.com>
To: "Andrea Parri (Microsoft)" <parri.andrea@gmail.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-hyperv@vger.kernel.org" <linux-hyperv@vger.kernel.org>
Cc: KY Srinivasan <kys@microsoft.com>,
Haiyang Zhang <haiyangz@microsoft.com>,
Stephen Hemminger <sthemmin@microsoft.com>,
Wei Liu <wei.liu@kernel.org>, Dexuan Cui <decui@microsoft.com>,
Saruhan Karademir <skarade@microsoft.com>,
Juan Vazquez <juvazq@microsoft.com>,
"James E.J. Bottomley" <jejb@linux.ibm.com>,
"Martin K. Petersen" <martin.petersen@oracle.com>,
"linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>
Subject: RE: [PATCH 3/3] scsi: storvsc: Validate length of incoming packet in storvsc_on_channel_callback()
Date: Fri, 18 Dec 2020 15:16:05 +0000 [thread overview]
Message-ID: <MW2PR2101MB10522786584587FBF9166DF0D7C39@MW2PR2101MB1052.namprd21.prod.outlook.com> (raw)
In-Reply-To: <20201217203321.4539-4-parri.andrea@gmail.com>
From: Andrea Parri (Microsoft) <parri.andrea@gmail.com> Sent: Thursday, December 17, 2020 12:33 PM
>
> Check that the packet is of the expected size at least, don't copy data
> past the packet.
>
> Reported-by: Saruhan Karademir <skarade@microsoft.com>
> Signed-off-by: Andrea Parri (Microsoft) <parri.andrea@gmail.com>
> Cc: "James E.J. Bottomley" <jejb@linux.ibm.com>
> Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
> Cc: linux-scsi@vger.kernel.org
> ---
> drivers/scsi/storvsc_drv.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c
> index 8714355cb63e7..4b8bde2750fac 100644
> --- a/drivers/scsi/storvsc_drv.c
> +++ b/drivers/scsi/storvsc_drv.c
> @@ -1250,6 +1250,12 @@ static void storvsc_on_channel_callback(void *context)
> request = (struct storvsc_cmd_request *)
> ((unsigned long)desc->trans_id);
>
> + if (hv_pkt_datalen(desc) < sizeof(struct vstor_packet) -
> + stor_device->vmscsi_size_delta) {
> + dev_err(&device->device, "Invalid packet len\n");
> + continue;
> + }
> +
> if (request == &stor_device->init_request ||
> request == &stor_device->reset_request) {
> memcpy(&request->vstor_packet, packet,
> --
> 2.25.1
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
next prev parent reply other threads:[~2020-12-18 15:16 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-17 20:33 [PATCH 0/3] scsi: storvsc: Validate length of incoming packet in storvsc_on_channel_callback() -- Take 2 Andrea Parri (Microsoft)
2020-12-17 20:33 ` [PATCH 1/3] scsi: storvsc: Fix max_outstanding_req_per_channel for Win8 and newer Andrea Parri (Microsoft)
2020-12-17 21:31 ` Dexuan Cui
2020-12-18 15:07 ` Michael Kelley
2020-12-17 20:33 ` [PATCH 2/3] scsi: storvsc: Resolve data race in storvsc_probe() Andrea Parri (Microsoft)
2020-12-17 21:31 ` Dexuan Cui
2020-12-18 15:14 ` Michael Kelley
2020-12-17 20:33 ` [PATCH 3/3] scsi: storvsc: Validate length of incoming packet in storvsc_on_channel_callback() Andrea Parri (Microsoft)
2020-12-17 21:31 ` Dexuan Cui
2020-12-18 15:16 ` Michael Kelley [this message]
2021-03-29 16:37 ` Olaf Hering
2021-03-30 9:08 ` Andrea Parri
2021-01-08 4:15 ` [PATCH 0/3] scsi: storvsc: Validate length of incoming packet in storvsc_on_channel_callback() -- Take 2 Martin K. Petersen
2021-01-13 5:48 ` Martin K. Petersen
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=MW2PR2101MB10522786584587FBF9166DF0D7C39@MW2PR2101MB1052.namprd21.prod.outlook.com \
--to=mikelley@microsoft.com \
--cc=decui@microsoft.com \
--cc=haiyangz@microsoft.com \
--cc=jejb@linux.ibm.com \
--cc=juvazq@microsoft.com \
--cc=kys@microsoft.com \
--cc=linux-hyperv@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-scsi@vger.kernel.org \
--cc=martin.petersen@oracle.com \
--cc=parri.andrea@gmail.com \
--cc=skarade@microsoft.com \
--cc=sthemmin@microsoft.com \
--cc=wei.liu@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).