From 7f0545cae7207ff91e39513108834e93674f7a6f Mon Sep 17 00:00:00 2001
From: "Markus F.X.J. Oberhumer" <markus@oberhumer.com>
Date: Sat, 20 May 2006 13:37:34 +0200
Subject: [PATCH] Check result of hdr compression.

---
 src/packer.cpp | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/packer.cpp b/src/packer.cpp
index bbed85c5..159dbb7d 100644
--- a/src/packer.cpp
+++ b/src/packer.cpp
@@ -1402,7 +1402,8 @@ void Packer::compressWithFilters(Filter *parm_ft,
     for (int m = 0; m < nmethods; m++)          // for all methods
     {
         unsigned hdr_clen = 0;
-        if (hdr_buf && hdr_u_len) {
+        if (hdr_buf && hdr_u_len)
+        {
             unsigned result[16];
             upx_compress_config_t conf;
             memset(&conf, 0xff, sizeof(conf));
@@ -1412,7 +1413,10 @@ void Packer::compressWithFilters(Filter *parm_ft,
             }
             int r = upx_compress(hdr_buf, hdr_u_len, *otemp, &hdr_clen,
                 0, methods[m], 10, &conf, result);
-            (void)r;
+            if (r != UPX_E_OK)
+                throwInternalError("header compression failed");
+            if (hdr_clen >= hdr_u_len)
+                throwInternalError("header compression size increase");
         }
         for (int i = 0; i < nfilters; i++)          // for all filters
         {