From ab9a2b17286875059e000c4d48296c843618f0fc Mon Sep 17 00:00:00 2001
From: Wilson Snyder <wsnyder@wsnyder.org>
Date: Thu, 5 Apr 2012 21:46:03 -0400
Subject: [PATCH] Internal: Prevent possible buffer overrun

---
 src/verilog.l | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/verilog.l b/src/verilog.l
index 9e7be64d3..3524593c0 100644
--- a/src/verilog.l
+++ b/src/verilog.l
@@ -112,11 +112,13 @@ void yyerror(const char* errmsg) {
 }
 
 void yyerrorf(const char* format, ...) {
-    char msg[1024];
+    const int maxlen = 2000;
+    char msg[maxlen];
 
     va_list ap;
     va_start(ap,format);
-    vsprintf(msg,format,ap);
+    vsnprintf(msg,maxlen,format,ap);
+    msg[maxlen-1] = '\0';
     va_end(ap);
 
     yyerror(msg);