From a980446d0cf8f455c49f6543bd8486b442e326b1 Mon Sep 17 00:00:00 2001
From: Nick Mathewson <nickm@torproject.org>
Date: Thu, 2 Dec 2004 04:33:01 +0000
Subject: Be more proactive about noticing underflows: size_t values greater
 than 0x800...00 are likely to be trouble.

svn:r3064
---
 src/common/compat.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'src/common/compat.c')

diff --git a/src/common/compat.c b/src/common/compat.c
index e025bff20..128ff4a2b 100644
--- a/src/common/compat.c
+++ b/src/common/compat.c
@@ -100,6 +100,8 @@ int tor_vsnprintf(char *str, size_t size, const char *format, va_list args)
   int r;
   if (size == 0)
     return -1; /* no place for the NUL */
+  if (size > SIZE_T_CEILING)
+    return -1;
 #ifdef MS_WINDOWS
   r = _vsnprintf(str, size, format, args);
 #else
-- 
cgit v1.2.3