From 42eb3c67e5ee5e0a0e8b5175a001bc5822c3a919 Mon Sep 17 00:00:00 2001
From: Linus Nordberg <linus@nordberg.se>
Date: Fri, 16 Jan 2015 16:35:24 +0100
Subject: Fix null pointer dereference in decttl().
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Patch by Stephen Röttger.
---
 radsecproxy.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/radsecproxy.c b/radsecproxy.c
index c83cef4..815e927 100644
--- a/radsecproxy.c
+++ b/radsecproxy.c
@@ -1173,6 +1173,9 @@ void addttlattr(struct radmsg *msg, uint32_t *attrtype, uint8_t addttl) {
 int decttl(uint8_t l, uint8_t *v) {
     int i;
 
+    if (l == 0)
+	return 0;
+
     i = l - 1;
     if (v[i]) {
 	if (--v[i--])
-- 
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