From f43eb5adcfa3be6368f116656348a29f22f580eb Mon Sep 17 00:00:00 2001
From: nashe <thomas@chauchefoin.fr>
Date: Tue, 12 Dec 2017 01:25:03 +0100
Subject: [PATCH] Prevent off-by-one read in stringmatchlen() (fixes #4527)

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

diff --git a/src/util.c b/src/util.c
index 8d68f0bb..36cbc43d 100644
--- a/src/util.c
+++ b/src/util.c
@@ -84,7 +84,7 @@ int stringmatchlen(const char *pattern, int patternLen,
             }
             match = 0;
             while(1) {
-                if (pattern[0] == '\\') {
+                if (pattern[0] == '\\' && patternLen >= 2) {
                     pattern++;
                     patternLen--;
                     if (pattern[0] == string[0])