add some dle sanity checking into onlyifset()

2026-09-25 04:10:00 +03:00 · 2019-02-22 13:27:02 -08:00
parent 1f90fde27f
commit 3d63e86076
1 changed files with 6 additions and 1 deletions
@@ -17,7 +17,12 @@
 static char *
 onlyifset(Line *l)
 {
-    char *ret = T(l->text) + l->dle;
+    char *ret;
+
+    if ( l->dle < 0 || l->dle >= S(l->text) )
+	return 0;
+
+    ret = T(l->text) + l->dle;

    return ret[0] ? ret : 0;
 }