From bb2571e36724ac346d81317f29a8dfdb338b9441 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pavel=20Czern=C3=BD?= <pczerny@opennebula.systems>
Date: Tue, 9 Feb 2021 09:10:58 +0100
Subject: [PATCH] B #5219: Fix zlib_decompress (#772)

---
 src/common/NebulaUtil.cc | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/common/NebulaUtil.cc b/src/common/NebulaUtil.cc
index ff377c2a50..a1e34b8c00 100644
--- a/src/common/NebulaUtil.cc
+++ b/src/common/NebulaUtil.cc
@@ -515,7 +515,7 @@ void one_util::split_unique(const string& st, char delim, set<string>& res)
 /**
  *  Buffer length for zlib inflate/deflate
  */
-#define ZBUFFER 65536
+#define ZBUFFER 16384
 
 string * one_util::zlib_compress(const string& in, bool base64)
 {
@@ -641,7 +641,8 @@ string * one_util::zlib_decompress(const string& in, bool base64)
 
         rc = inflate(&zs, Z_FINISH);
 
-        if ( rc != Z_STREAM_END && rc != Z_OK )
+        if ( (rc != Z_STREAM_END && rc != Z_OK && rc != Z_BUF_ERROR)
+             || (rc == Z_BUF_ERROR && zs.avail_out == ZBUFFER) )
         {
             inflateEnd(&zs);