CVE-2023-53381 NFSD: fix leaked reference count of nfsd4_ssc_umount_item

In the Linux kernel, the following vulnerability has been resolved: NFSD: fix leaked reference count of nfsd4sscumountitem The reference count of nfsd4sscumountitem is not decremented on error conditions. This prevents the laundromat from unmounting the vfsmount of the source file. This patch...