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vhost-user-blk: prevent using uninitialized vqs 

Same rational as: e6cc11d64f

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

This has already been fixed for vhost scsi devices and was
recently vhost-user scsi devices. This commit fixes it for
vhost-user-blk devices.

Suggested-by: Phillippe Mathieu-Daude <philmd@redhat.com>
Signed-off-by: Raphael Norwitz <raphael.norwitz@nutanix.com>
Message-Id: <1566498865-55506-1-git-send-email-raphael.norwitz@nutanix.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Raphael Norwitz 2019-08-22 11:34:24 -07:00 committed by Michael S. Tsirkin
parent d8b92bd418
commit d8438bd24a
1 changed files with 1 additions and 1 deletions
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2
hw/block/vhost-user-blk.c
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@ -421,7 +421,7 @@ static void vhost_user_blk_device_realize(DeviceState *dev, Error **errp)
}
s->inflight = g_new0(struct vhost_inflight, 1);
s->vqs = g_new(struct vhost_virtqueue, s->num_queues);
s->vqs = g_new0(struct vhost_virtqueue, s->num_queues);
s->watch = 0;
s->connected = false;