PROBLEM:        (QAR 46893)     (Patch ID: OSF375-360097)
********
This patch fixes a problem in which the system crashes when
attempting to NFS mount a text file.

The panic backtrace will look similar to the following:

(kdbx) t
>  0 boot() ["../../../../src/kernel/arch/alpha/machdep.c"]
   1 panic("ubc_invalidate: NULL object")
          ["../../../../src/kernel/bsd/subr_prf.c"]
   2 ubc_invalidate() ["../../../../src/kernel/vfs/vfs_ubc.c"]
   3 nfs3_getattr_otw() ["../../../../src/kernel/nfs/nfs_client.c"]
   4 nfs3getattr() ["../../../../src/kernel/nfs/nfs_client.c"]
   5 nfs3_getattr() ["../../../../src/kernel/nfs/nfs3_vnodeops.c"]
   6 vn_stat() ["../../../../src/kernel/vfs/vfs_vnops.c"]
   7 stat1() ["../../../../src/kernel/vfs/vfs_syscalls.c"]
   8 lstat() ["../../../../src/kernel/vfs/vfs_syscalls.c"]
   9 syscall() ["../../../../src/kernel/arch/alpha/syscall_trap.c"]
  10 _Xsyscall() ["../../../../src/kernel/arch/alpha/locore.s"]
(kdbx)