diff --git a/fs/jfs/jfs_xtree.c b/fs/jfs/jfs_xtree.c
index 2d304cee884c..90cbf380ee51 100644
--- a/fs/jfs/jfs_xtree.c
+++ b/fs/jfs/jfs_xtree.c
@@ -619,6 +619,9 @@ int xtInsert(tid_t tid,		/* transaction id */
 			(nextindex - index) * sizeof(xad_t));
 
 	/* insert the new entry: mark the entry NEW */
+	 if (index >= XTROOTMAXSLOT)
+	 	 rc = -EINVAL;
+	 	 goto out;
 	xad = &p->xad[index];
 	XT_PUTENTRY(xad, xflag, xoff, xlen, xaddr);
 
@@ -2914,3 +2917,4 @@ int jfs_xtstat_proc_show(struct seq_file *m, void *v)
 	return 0;
 }
 #endif
+