diff --git a/repair/phase6.c b/repair/phase6.c
index 105bce4..ed44e1b 100644
--- a/repair/phase6.c
+++ b/repair/phase6.c
@@ -2326,12 +2326,15 @@ longform_dir2_entry_check(xfs_mount_t	*mp,
 		db = xfs_dir2_da_to_db(mp, da_bno);
 		if (db >= num_bps) {
 			/* more data blocks than expected */
+			int num_bps_prev = num_bps;
 			num_bps = db + 1;
 			bplist = realloc(bplist, num_bps * sizeof(struct xfs_buf*));
 			if (!bplist)
 				do_error(_("realloc failed in %s (%zu bytes)\n"),
 					__func__,
 					num_bps * sizeof(struct xfs_buf*));
+			/* clear new memory as previous bplist was calloc'ed */
+			memset( (void *) bplist + num_bps_prev * sizeof(struct xfs_buf*), 0, (num_bps - num_bps_prev) * sizeof(struct xfs_buf*));
 		}
 
 		if (isblock)