From c1366571b609407cf0d4d9f4a2769d29e1313151 Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Tue, 20 Mar 2018 15:15:14 +0100
Subject: vauth/cleartext: fix integer overflow check

Make the integer overflow check not rely on the undefined behavior that
a size_t wraps around on overflow.

Detected by lgtm.com
Closes #2408
---
 lib/curl_setup.h | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'lib/curl_setup.h')

diff --git a/lib/curl_setup.h b/lib/curl_setup.h
index f128696e9..e4503c64c 100644
--- a/lib/curl_setup.h
+++ b/lib/curl_setup.h
@@ -447,6 +447,15 @@
 #  endif
 #endif
 
+#ifndef SIZE_T_MAX
+/* some limits.h headers have this defined, some don't */
+#if defined(SIZEOF_SIZE_T) && (SIZEOF_SIZE_T > 4)
+#define SIZE_T_MAX 18446744073709551615U
+#else
+#define SIZE_T_MAX 4294967295U
+#endif
+#endif
+
 /*
  * Arg 2 type for gethostname in case it hasn't been defined in config file.
  */
-- 
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