[Qemu-devel] [PATCH] vhost-user-scsi: prevent using uninitialized vqs

[Raphael Norwitz <raphael.norwitz@nutanix.com>]

Of the 3 virtqueues, seabios only sets cmd, leaving ctrl
and event without a physical address. This can cause
vhost_verify_ring_part_mapping to return ENOMEM, causing
the following logs:

qemu-system-x86_64: Unable to map available ring for ring 0
qemu-system-x86_64: Verify ring failure on region 0

The qemu commit e6cc11d64fc998c11a4dfcde8fda3fc33a74d844
has already resolved the issue for vhost scsi devices but
the fix was never applied to vhost-user scsi devices.

Signed-off-by: Raphael Norwitz <raphael.norwitz@nutanix.com>
---
 hw/scsi/vhost-user-scsi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/scsi/vhost-user-scsi.c b/hw/scsi/vhost-user-scsi.c
index a9fd8ea..e4aae95 100644
--- a/hw/scsi/vhost-user-scsi.c
+++ b/hw/scsi/vhost-user-scsi.c
@@ -91,7 +91,7 @@ static void vhost_user_scsi_realize(DeviceState *dev, Error **errp)
     }
 
     vsc->dev.nvqs = 2 + vs->conf.num_queues;
-    vsc->dev.vqs = g_new(struct vhost_virtqueue, vsc->dev.nvqs);
+    vsc->dev.vqs = g_new0(struct vhost_virtqueue, vsc->dev.nvqs);
     vsc->dev.vq_index = 0;
     vsc->dev.backend_features = 0;
     vqs = vsc->dev.vqs;
-- 
1.9.4