On 2020/2/20 下午11:19, Jason Gunthorpe wrote:
On Thu, Feb 20, 2020 at 02:11:40PM +0800, Jason Wang wrote:+static int virtio_vdpa_probe(struct vdpa_device *vdpa) +{ + const struct vdpa_config_ops *ops = vdpa->config; + struct virtio_vdpa_device *vd_dev; + int ret = -EINVAL; + + vd_dev = kzalloc(sizeof(*vd_dev), GFP_KERNEL); + if (!vd_dev) + return -ENOMEM; + + vd_dev->vdev.dev.parent = vdpa_get_dma_dev(vdpa); + vd_dev->vdev.dev.release = virtio_vdpa_release_dev; + vd_dev->vdev.config = &virtio_vdpa_config_ops; + vd_dev->vdpa = vdpa; + INIT_LIST_HEAD(&vd_dev->virtqueues); + spin_lock_init(&vd_dev->lock); + + vd_dev->vdev.id.device = ops->get_device_id(vdpa); + if (vd_dev->vdev.id.device == 0) + goto err; + + vd_dev->vdev.id.vendor = ops->get_vendor_id(vdpa); + ret = register_virtio_device(&vd_dev->vdev); + if (ret) + goto err;This error unwind is wrong. register_virtio_device() does device_initialize() as it's first action. After that point error unwind must be done with put_device() - particularly calling kfree(vd_dev) after doing dev_set_name() leaks memory.
Exactly.
Looks like about half of the register_virtio_device() users did this right, the others not. Perhaps you should fix them too... Jason
Will do. Thanks
