CVE-2022-50702 vdpa_sim: fix possible memory leak in vdpasim_net_init() and vdpasim_blk_init()

In the Linux kernel, the following vulnerability has been resolved: vdpasim: fix possible memory leak in vdpasimnetinit and vdpasimblkinit Inject fault while probing module, if deviceregister fails in vdpasimnetinit or vdpasimblkinit, but the refcount of kobject is not decreased to 0, the name...