linux-kernel - [PATCH V3 10/10] virtio-scsi: don't let virtio core to validate used buffer length

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Date:   Tue, 19 Oct 2021 15:01:52 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     mst@...hat.com, jasowang@...hat.com
Cc:     virtualization@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org, f.hetzelt@...berlin.de,
        david.kaplan@....com, konrad.wilk@...cle.com
Subject: [PATCH V3 10/10] virtio-scsi: don't let virtio core to validate used buffer length

We never tries to use used length, so the patch prevents the virtio
core from validating used length.

Signed-off-by: Jason Wang <jasowang@...hat.com>
---
 drivers/scsi/virtio_scsi.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/scsi/virtio_scsi.c b/drivers/scsi/virtio_scsi.c
index c25ce8f0e0af..be7870a092cf 100644
--- a/drivers/scsi/virtio_scsi.c
+++ b/drivers/scsi/virtio_scsi.c
@@ -977,6 +977,7 @@ static unsigned int features[] = {
 static struct virtio_driver virtio_scsi_driver = {
 	.feature_table = features,
 	.feature_table_size = ARRAY_SIZE(features),
+	.suppress_used_validation = true,
 	.driver.name = KBUILD_MODNAME,
 	.driver.owner = THIS_MODULE,
 	.id_table = id_table,
-- 
2.25.1