CVE-2022-48919 cifs: fix double free race when mount fails in cifs_get_root()

In the Linux kernel, the following vulnerability has been resolved: cifs: fix double free race when mount fails in cifsgetroot When cifsgetroot fails during cifssmb3domount we call deactivatelockedsuper which eventually will call delayedfree which will free the context. In this situation we shoul...