From 19c7587f28a8b3de2ad161020d4673c674af343b Mon Sep 17 00:00:00 2001
From: "Chloe M." <chloe@mirocom.org>
Date: Sat, 23 May 2026 14:36:20 +0000
Subject: core: tokbuf: Fix buffer overflow

Signed-off-by: Chloe M. <chloe@mirocom.org>
---
 core/tokbuf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/tokbuf.c b/core/tokbuf.c
index e880c15..05e8755 100644
--- a/core/tokbuf.c
+++ b/core/tokbuf.c
@@ -30,7 +30,7 @@ tokbuf_push(struct tokbuf *tokbuf, struct token *tok)
         return -1;
     }
 
-    if ((tokbuf->head++) >= TOKBUF_CAP) {
+    if ((tokbuf->head++) >= TOKBUF_CAP - 1) {
         tokbuf->head = 0;
     }
 
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