virtio-blk: free vblk-vqs in error path of virtblk_probe()

BugLink: https://bugs.launchpad.net/bugs/1887011

[ Upstream commit e7eea44e ]

Else there will be memory leak if alloc_disk() fails.

Fixes: 6a27b656 ("block: virtio-blk: support multi virt queues per virtio-blk device")
Signed-off-by: Hou Tao <houtao1@huawei.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Kelsey Skunberg <kelsey.skunberg@canonical.com>

drivers/block/virtio_blk.c

@@ -757,6 +757,7 @@ static int virtblk_probe(struct virtio_device *vdev)
 	put_disk(vblk->disk);
 out_free_vq:
 	vdev->config->del_vqs(vdev);
+	kfree(vblk->vqs);
 out_free_vblk:
 	kfree(vblk);
 out_free_index: