Index: geom_slice.c
===================================================================
RCS file: /private/FreeBSD/src/sys/geom/geom_slice.c,v
retrieving revision 1.51
diff -u -p -r1.51 geom_slice.c
--- geom_slice.c	12 Feb 2004 22:42:11 -0000	1.51
+++ geom_slice.c	24 Jun 2004 09:28:59 -0000
@@ -62,7 +62,10 @@ g_slice_alloc(unsigned nslice, unsigned 
 	struct g_slicer *gsp;
 
 	gsp = g_malloc(sizeof *gsp, M_WAITOK | M_ZERO);
-	gsp->softc = g_malloc(scsize, M_WAITOK | M_ZERO);
+	if (scsize > 0)
+		gsp->softc = g_malloc(scsize, M_WAITOK | M_ZERO);
+	else
+		gsp->softc = NULL;
 	gsp->slices = g_malloc(nslice * sizeof(struct g_slice),
 	    M_WAITOK | M_ZERO);
 	gsp->nslice = nslice;
@@ -468,7 +471,8 @@ g_slice_new(struct g_class *mp, u_int sl
 		g_wither_geom(gp, ENXIO);
 		return (NULL);
 	}
-	*vp = gsp->softc;
+	if (extrap != NULL)
+		*vp = gsp->softc;
 	*cpp = cp;
 	return (gp);
 }