From 21bdcfcde1327201fe24d6604b7631f7b970d7c0 Mon Sep 17 00:00:00 2001
From: "Alan T. DeKok" <aland@freeradius.org>
Date: Tue, 15 Dec 2009 16:01:20 +0100
Subject: [PATCH] Ensure that len > 0

---
 src/lib/valuepair.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/lib/valuepair.c b/src/lib/valuepair.c
index 2f2c73c..f6f4abc 100644
--- a/src/lib/valuepair.c
+++ b/src/lib/valuepair.c
@@ -1626,7 +1626,7 @@ VALUE_PAIR *pairread(const char **ptr, FR_TOKEN *eol)
 	/*
 	 *	We may have Foo-Bar:= stuff, so back up.
 	 */
-	if (attr[len - 1] == ':') {
+	if ((len > 0) && (attr[len - 1] == ':')) {
 		p--;
 		len--;
 	}
-- 
2.1.4