From 19de26939e04b09f2c3c678c31337495587dbf8b Mon Sep 17 00:00:00 2001
From: Aetias <aetias@outlook.com>
Date: Wed, 20 Sep 2023 22:52:35 +0200
Subject: [PATCH] Fix OoB compression lookahead

---
 tools/compress/main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/compress/main.c b/tools/compress/main.c
index c4ae0acf..5c2cc10f 100644
--- a/tools/compress/main.c
+++ b/tools/compress/main.c
@@ -33,7 +33,7 @@
 bool FindSubsequence(const uint8_t *buf, const uint8_t *start, const uint8_t *end, size_t *pLen, size_t *pDist) {
     size_t bestLen = 0;
     size_t bestDist = 0;
-    size_t maxLookahead = min(LOOKAHEAD + MAX_SUBSEQ, end - buf);
+    size_t maxLookahead = min(LOOKAHEAD + MAX_SUBSEQ, end - buf - 1);
     for (size_t i = 0; i < maxLookahead; ++i) {
         const uint8_t *needle = buf;
         const uint8_t *haystack = buf + 1 + i;