CVE-2022-50046

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> net/sunrpc: fix potential memory leaks in rpc_sysfs_xprt_state_change()<br /> <br /> The issue happens on some error handling paths. When the function<br /> fails to grab the object `xprt`, it simply returns 0, forgetting to<br /> decrease the reference count of another object `xps`, which is<br /> increased by rpc_sysfs_xprt_kobj_get_xprt_switch(), causing refcount<br /> leaks. Also, the function forgets to check whether `xps` is valid<br /> before using it, which may result in NULL-dereferencing issues.<br /> <br /> Fix it by adding proper error handling code when either `xprt` or<br /> `xps` is NULL.