Apply by doing:

Apply by doing:
cd /usr/src
patch -p0 < 012_nfs.patch
And then rebuild your kernel.

Index: sys/nfs/nfs_vfsops.c
===================================================================
RCS file: /cvs/src/sys/nfs/nfs_vfsops.c,v
retrieving revision 1.32
retrieving revision 1.32.2.1
diff -u -r1.32 -r1.32.2.1
--- sys/nfs/nfs_vfsops.c 2001/02/20 01:50:11 1.32
+++ sys/nfs/nfs_vfsops.c 2001/07/30 22:07:10 1.32.2.1
@@ -1,4 +1,4 @@
-/* $OpenBSD: nfs_vfsops.c,v 1.32 2001/02/20 01:50:11 assar Exp $ */
+/* $OpenBSD: nfs_vfsops.c,v 1.32.2.1 2001/07/30 22:07:10 jason Exp $ */
/* $NetBSD: nfs_vfsops.c,v 1.46.4.1 1996/05/25 22:40:35 fvdl Exp $ */

/*
@@ -649,6 +649,8 @@
nfs_decode_args(nmp, &args, &mp->mnt_stat.mount_info.nfs_args);
return (0);
}
+ if (args.fhsize < 0 || args.fhsize > NFSX_V3FHMAX)
+ return (EINVAL);
error = copyin((caddr_t)args.fh, (caddr_t)nfh, args.fhsize);
if (error)
return (error);