CVE-2022-50046 net/sunrpc: fix potential memory leaks in rpc_sysfs_xprt_state_change()

In the Linux kernel, the following vulnerability has been resolved: net/sunrpc: fix potential memory leaks in rpcsysfsxprtstatechange The issue happens on some error handling paths. When the function fails to grab the object xprt, it simply returns 0, forgetting to decrease the reference count of...