Index: ffs_snapshot.c
===================================================================
RCS file: /cvsroot/src/sys/ufs/ffs/ffs_snapshot.c,v
retrieving revision 1.82.4.3
diff -p -u -2 -r1.82.4.3 ffs_snapshot.c
--- ffs_snapshot.c	28 Mar 2010 17:28:33 -0000	1.82.4.3
+++ ffs_snapshot.c	25 Feb 2013 16:05:13 -0000
@@ -688,4 +688,5 @@ snapshot_expunge(struct mount *mp, struc
 	for (; cg < fs->fs_ncg; cg++)
 		*blkp++ = fragstoblks(fs, cgtod(fs, cg));
+	(*snaplist)[0] = blkp - &(*snaplist)[0];
 
 out: