From 63afeb7373c7695ed988dbb08852f6181f93fdcb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A1szl=C3=B3=20Moln=C3=A1r?=
 <ezerotven+github@gmail.com>
Date: Thu, 14 May 2015 21:48:16 +0200
Subject: [PATCH] added a check for corrupted packheader

---
 src/packhead.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/packhead.cpp b/src/packhead.cpp
index cbc06817..ff64998e 100644
--- a/src/packhead.cpp
+++ b/src/packhead.cpp
@@ -286,6 +286,8 @@ bool PackHeader::fillPackHeader(const upx_bytep buf, int blen)
         if (p[size - 1] != get_packheader_checksum(p, size - 1))
             throwCantUnpack("header corrupted 3");
 
+    if (c_len < 2 || u_len < 2 || c_len > 500000000 || u_len > 500000000)
+        throwCantUnpack("header corrupted 4");
     //
     // success
     //