From 22fa0421cdaed8bf4e151777fd8fc1c09487fa44 Mon Sep 17 00:00:00 2001
From: Vsevolod Stakhov <vsevolod@highsecure.ru>
Date: Thu, 7 Jun 2018 11:29:28 +0100
Subject: [PATCH] [Minor] Do not read out of the bounds

---
 src/libutil/str_util.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/libutil/str_util.c b/src/libutil/str_util.c
index 7c2a545c0..026e331fe 100644
--- a/src/libutil/str_util.c
+++ b/src/libutil/str_util.c
@@ -1261,7 +1261,7 @@ rspamd_substring_preprocess_kmp (const gchar *pat, gsize len, goffset *fsm,
 		i++;
 		j++;
 
-		if (f(pat[i], pat[j])) {
+		if (i < len && j < len && f(pat[i], pat[j])) {
 			fsm[i] = fsm[j];
 		}
 		else {
-- 
2.39.5