File do-not-monkey-patch-yaml-bsc-1177474.patch of Package salt

From 171099c675ab7c9c48d00201705e67e20d70eba3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pablo=20Su=C3=A1rez=20Hern=C3=A1ndez?=
 <psuarezhernandez@suse.com>
Date: Mon, 8 Mar 2021 12:35:14 +0000
Subject: [PATCH] Do not monkey patch yaml (bsc#1177474)

Add unit test to check for monkey patching
---
 salt/utils/yamlloader.py            | 12 ++++--------
 tests/unit/utils/test_yamlloader.py |  6 +++++-
 2 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/salt/utils/yamlloader.py b/salt/utils/yamlloader.py
index 0516647d1f..37e0625b34 100644
--- a/salt/utils/yamlloader.py
+++ b/salt/utils/yamlloader.py
@@ -10,13 +10,9 @@ import warnings
 import yaml  # pylint: disable=blacklisted-import
 from yaml.nodes import MappingNode, SequenceNode
 from yaml.constructor import ConstructorError
-try:
-    yaml.Loader = yaml.CLoader
-    yaml.Dumper = yaml.CDumper
-    yaml.SafeLoader = yaml.CSafeLoader
-    yaml.SafeDumper = yaml.CSafeDumper
-except Exception:  # pylint: disable=broad-except
-    pass
+
+# prefer C bindings over python when available
+BaseLoader = getattr(yaml, 'CSafeLoader', yaml.SafeLoader)
 
 import salt.utils.stringutils
 
@@ -34,7 +30,7 @@ warnings.simplefilter('always', category=DuplicateKeyWarning)
 
 
 # with code integrated from https://gist.github.com/844388
-class SaltYamlSafeLoader(yaml.SafeLoader):
+class SaltYamlSafeLoader(BaseLoader):
     '''
     Create a custom YAML loader that uses the custom constructor. This allows
     for the YAML loading defaults to be manipulated based on needs within salt
diff --git a/tests/unit/utils/test_yamlloader.py b/tests/unit/utils/test_yamlloader.py
index 65d3850d58..90081934c7 100644
--- a/tests/unit/utils/test_yamlloader.py
+++ b/tests/unit/utils/test_yamlloader.py
@@ -10,7 +10,7 @@ import textwrap
 
 # Import Salt Libs
 from yaml.constructor import ConstructorError
-from salt.utils.yamlloader import SaltYamlSafeLoader
+from salt.utils.yamlloader import SaltYamlSafeLoader, yaml
 import salt.utils.files
 from salt.ext import six
 
@@ -148,3 +148,7 @@ class YamlLoaderTestCase(TestCase):
                   b: {foo: bar, one: 1, list: [1, two, 3]}''')),
             {'foo': {'b': {'foo': 'bar', 'one': 1, 'list': [1, 'two', 3]}}}
         )
+
+    def test_not_yaml_monkey_patching(self):
+        if hasattr(yaml, "CSafeLoader"):
+            assert yaml.SafeLoader != yaml.CSafeLoader
-- 
2.30.1