krb5 commit [krb5-1.14]: Add test for empty K/M key data handling

[Tom Yu]

https://github.com/krb5/krb5/commit/b371a2c8bbf362df79ee4635a04d50d8b8ba87db
commit b371a2c8bbf362df79ee4635a04d50d8b8ba87db
Author: Matt Rogers <mrogers at redhat.com>
Date:   Fri Apr 22 12:53:41 2016 -0400

    Add test for empty K/M key data handling
    
    (cherry picked from commit f2286a6493c7aab267cf0d9cca680edaf2968707)
    
    ticket: 8395
    version_fixed: 1.14.3

 src/tests/t_mkey.py |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/src/tests/t_mkey.py b/src/tests/t_mkey.py
index 572b2ad..c53b71b 100755
--- a/src/tests/t_mkey.py
+++ b/src/tests/t_mkey.py
@@ -328,4 +328,11 @@ check_mkvno(realm.user_princ, 1)
 realm.run([kdb5_util, 'use_mkey', '2', 'now-1day'])
 check_mkey_list((2, defetype, True, True), (1, des3, True, False))
 
+# Regression test for #8395.  Purge the master key and verify that a
+# master key fetch does not segfault.
+realm.run([kadminl, 'purgekeys', '-all', 'K/M'])
+out = realm.run([kadminl, 'getprinc', realm.user_princ], expected_code=1)
+if 'Cannot find master key record in database' not in out:
+    fail('Unexpected output from failed master key fetch')
+
 success('Master key rollover tests')