From dc74d755a84f3ed75b16b95ea3934faf61fc14bf Mon Sep 17 00:00:00 2001
From: Mark Spencer <markster@digium.com>
Date: Thu, 27 Jan 2005 20:47:10 +0000
Subject: [PATCH] Check for data presense (bug #3435 again)

git-svn-id: https://origsvn.digium.com/svn/libpri/trunk@184 2fbb986a-6c06-0410-b554-c9c1f0a7f128
---
 q931.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/q931.c b/q931.c
index fe86deb..053142e 100755
--- a/q931.c
+++ b/q931.c
@@ -1376,6 +1376,8 @@ static FUNC_DUMP(dump_cause)
 	pri_message("%c                  Ext: %d  Cause: %s (%d), class = %s (%d) ]\n",
 		prefix, (ie->data[1] >> 7), pri_cause2str(ie->data[1] & 0x7f), ie->data[1] & 0x7f, 
 			pri_causeclass2str((ie->data[1] & 0x7f) >> 4), (ie->data[1] & 0x7f) >> 4);
+	if (ie->len < 3)
+		return;
 	/* Dump cause data in readable form */
 	switch(ie->data[1] & 0x7f) {
 	case PRI_CAUSE_IE_NONEXIST: