merge revision(s) 62990:

	Ignore file separator from tmpfile/tmpdir name.

	From: SHIBATA Hiroshi <hsbt@ruby-lang.org>

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_4@62998 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

4 files changed, 47 insertions, 2 deletions

diff --git a/lib/tmpdir.rb b/lib/tmpdir.rb
index d12afa1ae6..13ed580eb4 100644
--- a/lib/tmpdir.rb
+++ b/lib/tmpdir.rb
@@ -109,8 +109,10 @@ class Dir
     def make_tmpname((prefix, suffix), n)
       prefix = (String.try_convert(prefix) or
                 raise ArgumentError, "unexpected prefix: #{prefix.inspect}")
+      prefix = prefix.delete("#{File::SEPARATOR}#{File::ALT_SEPARATOR}")
       suffix &&= (String.try_convert(suffix) or
                   raise ArgumentError, "unexpected suffix: #{suffix.inspect}")
+      suffix &&= suffix.delete("#{File::SEPARATOR}#{File::ALT_SEPARATOR}")
       t = Time.now.strftime("%Y%m%d")
       path = "#{prefix}#{t}-#{$$}-#{rand(0x100000000).to_s(36)}".dup
       path << "-#{n}" if n
diff --git a/test/test_tempfile.rb b/test/test_tempfile.rb
index a31ea67fd0..ff61cc5076 100644
--- a/test/test_tempfile.rb
+++ b/test/test_tempfile.rb
@@ -365,5 +365,31 @@ puts Tempfile.new('foo').path
     }
     assert_file.not_exist?(path)
   end
-end
 
+  TRAVERSAL_PATH = Array.new(Dir.pwd.split('/').count, '..').join('/') + Dir.pwd + '/'
+
+  def test_open_traversal_dir
+    expect = Dir.glob(TRAVERSAL_PATH + '*').count
+    t = Tempfile.open([TRAVERSAL_PATH, 'foo'])
+    actual = Dir.glob(TRAVERSAL_PATH + '*').count
+    assert_equal expect, actual
+  ensure
+    t.close!
+  end
+
+  def test_new_traversal_dir
+    expect = Dir.glob(TRAVERSAL_PATH + '*').count
+    t = Tempfile.new(TRAVERSAL_PATH + 'foo')
+    actual = Dir.glob(TRAVERSAL_PATH + '*').count
+    assert_equal expect, actual
+  ensure
+    t.close!
+  end
+
+  def test_create_traversal_dir
+    expect = Dir.glob(TRAVERSAL_PATH + '*').count
+    Tempfile.create(TRAVERSAL_PATH + 'foo')
+    actual = Dir.glob(TRAVERSAL_PATH + '*').count
+    assert_equal expect, actual
+  end
+end
diff --git a/test/test_tmpdir.rb b/test/test_tmpdir.rb
index 4fc4bca4d5..c9e85aeae2 100644
--- a/test/test_tmpdir.rb
+++ b/test/test_tmpdir.rb
@@ -56,4 +56,21 @@ class TestTmpdir < Test::Unit::TestCase
       assert_kind_of(String, d)
     }
   end
+
+  TRAVERSAL_PATH = Array.new(Dir.pwd.split('/').count, '..').join('/') + Dir.pwd + '/'
+  TRAVERSAL_PATH.delete!(':') if /mswin|mingw/ =~ RUBY_PLATFORM
+
+  def test_mktmpdir_traversal
+    expect = Dir.glob(TRAVERSAL_PATH + '*').count
+    Dir.mktmpdir(TRAVERSAL_PATH + 'foo')
+    actual = Dir.glob(TRAVERSAL_PATH + '*').count
+    assert_equal expect, actual
+  end
+
+  def test_mktmpdir_traversal_array
+    expect = Dir.glob(TRAVERSAL_PATH + '*').count
+    Dir.mktmpdir([TRAVERSAL_PATH, 'foo'])
+    actual = Dir.glob(TRAVERSAL_PATH + '*').count
+    assert_equal expect, actual
+  end
 end
diff --git a/version.h b/version.h
index 1141c17130..f8d588c2a9 100644
--- a/version.h
+++ b/version.h
@@ -1,6 +1,6 @@
 #define RUBY_VERSION "2.4.4"
 #define RUBY_RELEASE_DATE "2018-03-28"
-#define RUBY_PATCHLEVEL 289
+#define RUBY_PATCHLEVEL 290
 
 #define RUBY_RELEASE_YEAR 2018
 #define RUBY_RELEASE_MONTH 3