From 4ef0a966392672d04a567c25758462fe3bbb0fb4 Mon Sep 17 00:00:00 2001
From: Kazuki Yamaguchi <k@rhe.jp>
Date: Sun, 28 Jun 2020 15:33:26 +0200
Subject: [PATCH] Filter: Fix comparison of BGP path mask

Add a missing return statement. Path masks with the same length were all
considered the same. Comparing two with different length would cause
out-of-bounds memory access.
---
 filter/data.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/filter/data.c b/filter/data.c
index 40220255..9547a4c8 100644
--- a/filter/data.c
+++ b/filter/data.c
@@ -230,6 +230,7 @@ static int
 pm_same(const struct f_path_mask *m1, const struct f_path_mask *m2)
 {
   if (m1->len != m2->len)
+    return 0;
 
   for (uint i=0; i<m1->len; i++)
     if (!pmi_same(&(m1->item[i]), &(m2->item[i])))