When mmap(2) is used with a vnode, capture vnode attributes in the

audit trail.  This was not required for Common Criteria auditing
(which requires only that the intent to read or write be audited
at the time of open(2)), but is useful for contemporary live
analysis and forensics.

MFC after:	3 days
Sponsored by:	DARPA, AFRL

sys/vm/vm_mmap.c

@@ -1245,6 +1245,7 @@ vm_mmap_vnode(struct thread *td, vm_size_t objsize,
 		locktype = LK_SHARED;
 	if ((error = vget(vp, locktype, td)) != 0)
 		return (error);
+	AUDIT_ARG_VNODE1(vp);
 	foff = *foffp;
 	flags = *flagsp;
 	obj = vp->v_object;