linux-kernel - [PATCH 5.4 14/90] vhost/scsi: fix up req type endian-ness

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Date:   Mon,  3 Aug 2020 14:18:36 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, "Michael S. Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        Stefan Hajnoczi <stefanha@...hat.com>
Subject: [PATCH 5.4 14/90] vhost/scsi: fix up req type endian-ness

From: Michael S. Tsirkin <mst@...hat.com>

commit 295c1b9852d000580786375304a9800bd9634d15 upstream.

vhost/scsi doesn't handle type conversion correctly
for request type when using virtio 1.0 and up for BE,
or cross-endian platforms.

Fix it up using vhost_32_to_cpu.

Cc: stable@...r.kernel.org
Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
Acked-by: Jason Wang <jasowang@...hat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/vhost/scsi.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/vhost/scsi.c
+++ b/drivers/vhost/scsi.c
@@ -1215,7 +1215,7 @@ vhost_scsi_ctl_handle_vq(struct vhost_sc
 			continue;
 		}

-		switch (v_req.type) {
+		switch (vhost32_to_cpu(vq, v_req.type)) {
 		case VIRTIO_SCSI_T_TMF:
 			vc.req = &v_req.tmf;
 			vc.req_size = sizeof(struct virtio_scsi_ctrl_tmf_req);