Fix problem where gss_display_status can infinite loop

Prevent-GSSError-_display_status-infinite-recursion.patch

@@ -0,0 +1,69 @@
+From d7793765e75e2c0db31565903b50bb90bced18ff Mon Sep 17 00:00:00 2001
+From: Robbie Harwood <rharwood@redhat.com>
+Date: Mon, 27 Mar 2017 13:24:37 -0400
+Subject: [PATCH] Prevent GSSError/_display_status() infinite recursion
+
+I was unable to reproduce the problem, but this should prevent the issue.
+
+Resolves: #111
+(cherry picked from commit b7e6c6c5451590f18df965a2a84550a63461d76e)
+---
+ gssapi/raw/misc.pyx | 20 +++++++++++---------
+ 1 file changed, 11 insertions(+), 9 deletions(-)
+
+diff --git a/gssapi/raw/misc.pyx b/gssapi/raw/misc.pyx
+index e278c4b..4ea0c55 100644
+--- a/gssapi/raw/misc.pyx
++++ b/gssapi/raw/misc.pyx
+@@ -139,7 +139,7 @@ def _display_status(unsigned int error_code, bint is_major_code,
+             whether or not to call again for further messages
+ 
+     Raises:
+-       GSSError
++       ValueError
+     """
+ 
+     cdef int status_type
+@@ -165,13 +165,16 @@ def _display_status(unsigned int error_code, bint is_major_code,
+ 
+     if maj_stat == GSS_S_COMPLETE:
+         call_again = bool(msg_ctx_out)
+-
+         msg_out = msg_buff.value[:msg_buff.length]
+         gss_release_buffer(&min_stat, &msg_buff)
+         return (msg_out, msg_ctx_out, call_again)
+     else:
+-        # NB(directxman12): this is highly unlikely to cause a recursive loop
+-        raise GSSError(maj_stat, min_stat)
++        # This hides whatever error gss_display_status is complaining about,
++        # but obviates infinite recursion into stack exhaustion.  The
++        # exception raised here is handled by get_all_statuses(), which prints
++        # the code.
++        raise ValueError("gss_display_status call returned failure "
++                         "(major {0}, minor {1}).".format(maj_stat, min_stat))
+ 
+ 
+ class GSSErrorRegistry(type):
+@@ -294,8 +297,8 @@ class GSSError(Exception, metaclass=GSSErrorRegistry):
+         try:
+             msg, ctx, cont = _display_status(code, is_maj)
+             res.append(msg.decode(msg_encoding))
+-        except GSSError:
+-            res.append(u'issue decoding code: {0}'.format(code))
++        except ValueError as e:
++            res.append(u'{0}  Decoding code: {1}'.format(e, code))
+             cont = False
+ 
+         while cont:
+@@ -303,9 +306,8 @@ class GSSError(Exception, metaclass=GSSErrorRegistry):
+                 msg, ctx, cont = _display_status(code, is_maj,
+                                                  message_context=ctx)
+                 res.append(msg.decode(msg_encoding))
+-            except GSSError:
+-                res.append(u'issue decoding '
+-                           u'code: {0}'.format(code))
++            except ValueError:
++                res.append(u'{0}  Decoding code: {1}'.format(e, code))
+                 cont = False
+ 
+         return res

python-gssapi.spec

@@ -5,13 +5,16 @@
 
 Name:           python-gssapi
 Version:        1.2.0
-Release:        4%{?dist}
+Release:        5%{?dist}
 Summary:        Python Bindings for GSSAPI (RFC 2743/2744 and extensions)
 
 License:        ISC
 URL:            https://github.com/pythongssapi/python-gssapi
 Source0:        https://github.com/pythongssapi/%{name}/releases/download/v%{version}/%{name}-%{version}.tar.gz
 
+# Patches
+Patch0: Prevent-GSSError-_display_status-infinite-recursion.patch
+
 BuildRequires:  python2-devel
 BuildRequires:  krb5-devel >= 1.10
 BuildRequires:  krb5-libs >= 1.10
@@ -23,6 +26,9 @@ Requires:       python-six
 Requires:       python-enum34
 Requires:       python-decorator
 
+# For autosetup
+BuildRequires: git
+
 %if 0%{?run_tests}
 BuildRequires:  python-nose
 BuildRequires:  python-nose-parameterized
@@ -64,7 +70,7 @@ RFC 2743, as well as multiple extensions.
 %endif
 
 %prep
-%setup -q
+%autosetup -S git -n %{name}-%{version}
 
 %if 0%{?with_python3}
 rm -rf %{py3dir}
@@ -128,6 +134,10 @@ popd
 
 
 %changelog
+* Tue Apr 04 2017 Robbie Harwood <rharwood@redhat.com> 1.2.0-5
+- Fix problem where gss_display_status can infinite loop
+- Move to autosetup and rpm-git-tree
+
 * Sat Feb 11 2017 Fedora Release Engineering <releng@fedoraproject.org> - 1.2.0-4
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_26_Mass_Rebuild