CVE-2024-46690 nfsd: fix nfsd4_deleg_getattr_conflict in presence of third party lease

In the Linux kernel, the following vulnerability has been resolved: nfsd: fix nfsd4deleggetattrconflict in presence of third party lease It is not safe to dereference fl-c.flcowner without first confirming fl-fllmops is the expected manager. nfsd4deleggetattrconflict tests fllmops but largely...