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From 6a36fbe3b3e001a8a840b5c1fdd81cefc9947f0d Mon Sep 17 00:00:00 2001
From: Daniel Veillard <veillard@redhat.com>
Date: Mon, 29 Oct 2012 02:39:55 +0000
Subject: Fix potential out of bound access

---
diff --git a/parser.c b/parser.c
index 0d8d7f2..bd634e9 100644
--- a/parser.c
+++ b/parser.c
@@ -4076,7 +4076,7 @@ xmlParseAttValueComplex(xmlParserCtxtPtr ctxt, int *attlen, int normalize) {
         goto error;
 
     if ((in_space) && (normalize)) {
-        while (buf[len - 1] == 0x20) len--;
+        while ((len > 0) && (buf[len - 1] == 0x20)) len--;
     }
     buf[len] = 0;
     if (RAW == '<') {
--
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