From 7930ee12093eae1e1ab9422c4f4f9f8c5661fcb9 Mon Sep 17 00:00:00 2001
From: Jakub Hrozek <jhrozek@redhat.com>
Date: Tue, 23 May 2017 13:55:01 +0200
Subject: [PATCH 137/138] TESTS: Add a test for parallel execution of klist
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Integration test for:
    https://pagure.io/SSSD/sssd/issue/3372

With https://pagure.io/SSSD/sssd/issue/3372 still broken, the unit test
wold fail because one of the concurrent klist commands would trigger a
race condition in the KCM queue code, crashing the KCM responder.

Reviewed-by: Pavel Březina <pbrezina@redhat.com>
(cherry picked from commit 274489b092bba5fc81cb0f803843d56b267c5aaf)
---
 src/tests/intg/krb5utils.py |  6 +++++-
 src/tests/intg/test_kcm.py  | 22 ++++++++++++++++++++++
 2 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/src/tests/intg/krb5utils.py b/src/tests/intg/krb5utils.py
index 775cffd0bbfa011f2d8ffc1169dccfef96d78fab..0349ff3829533088fb2263f84b19574127d6e809 100644
--- a/src/tests/intg/krb5utils.py
+++ b/src/tests/intg/krb5utils.py
@@ -36,7 +36,7 @@ class Krb5Utils(object):
     def __init__(self, krb5_conf_path):
         self.krb5_conf_path = krb5_conf_path
 
-    def _run_in_env(self, args, stdin=None, extra_env=None):
+    def spawn_in_env(self, args, stdin=None, extra_env=None):
         my_env = os.environ
         my_env['KRB5_CONFIG'] = self.krb5_conf_path
 
@@ -50,6 +50,10 @@ class Krb5Utils(object):
                                stdin=subprocess.PIPE,
                                stdout=subprocess.PIPE,
                                stderr=subprocess.PIPE)
+        return cmd
+
+    def _run_in_env(self, args, stdin=None, extra_env=None):
+        cmd = self.spawn_in_env(args, stdin, extra_env)
         out, err = cmd.communicate(stdin)
         return cmd.returncode, out.decode('utf-8'), err.decode('utf-8')
 
diff --git a/src/tests/intg/test_kcm.py b/src/tests/intg/test_kcm.py
index 11f80a1803b4ad9b8e8857bf9a8a244d4816f0a2..1ab2a1837687a6c2cf8676124b42538833550c91 100644
--- a/src/tests/intg/test_kcm.py
+++ b/src/tests/intg/test_kcm.py
@@ -445,3 +445,25 @@ def test_kcm_sec_kdestroy_nocache(setup_for_kcm_sec,
                                   setup_secrets):
     testenv = setup_for_kcm_sec
     exercise_subsidiaries(testenv)
+
+def test_kcm_sec_parallel_klist(setup_for_kcm_sec,
+                                setup_secrets):
+    """
+    Test that parallel operations from a single UID are handled well.
+    Regression test for https://pagure.io/SSSD/sssd/issue/3372
+    """
+    testenv = setup_for_kcm_sec
+
+    testenv.k5kdc.add_principal("alice", "alicepw")
+    out, _, _ = testenv.k5util.kinit("alice", "alicepw")
+    assert out == 0
+
+
+    processes = []
+    for i in range(0,10):
+        p = testenv.k5util.spawn_in_env(['klist', '-A'])
+        processes.append(p)
+
+    for p in processes:
+        rc = p.wait()
+        assert rc == 0
-- 
2.9.4