From d70e47dc6b410fa7b6673aba6c3be0372639fda8 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Mon, 1 May 2017 02:01:38 +0000
Subject: zlib.c: no buf_filled in zstream

* ext/zlib/zlib.c (zstream): manage capacity and size of `buf`
  instead of size and separated member `buf_filled`.  reported by
  Christian Jalio (jalio) at https://hackerone.com/reports/211958

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58526 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 test/zlib/test_zlib.rb | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'test/zlib')

diff --git a/test/zlib/test_zlib.rb b/test/zlib/test_zlib.rb
index 38cb393872..b6a4510b80 100644
--- a/test/zlib/test_zlib.rb
+++ b/test/zlib/test_zlib.rb
@@ -127,6 +127,16 @@ if defined? Zlib
       assert_equal("foobar", Zlib::Inflate.inflate(s))
     end
 
+    def test_expand_buffer;
+      z = Zlib::Deflate.new
+      src = "baz" * 1000
+      z.avail_out = 1
+      GC.stress = true
+      s = z.deflate(src, Zlib::FINISH)
+      GC.stress = false
+      assert_equal(src, Zlib::Inflate.inflate(s))
+    end
+
     def test_total
       z = Zlib::Deflate.new
       1000.times { z << "foo" }
-- 
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