macos: don't crash on krb5 damage

if we get success but still no client, don't crash

Change-Id: I6be28ac6ecece3448123a84cf442a791eebc93cc
Reviewed-on: http://gerrit.openafs.org/6868
Reviewed-by: Derrick Brashear <shadow@dementix.org>
Tested-by: Derrick Brashear <shadow@dementix.org>

diff --git a/src/platform/DARWIN/AFSPreference/Krb5Util.m b/src/platform/DARWIN/AFSPreference/Krb5Util.m
index 6a54f2a5bd7b7fc35d68aa0b08c138e9cc6430b0..fff03caad01f6fb6f103bc314a92b2d8fd8c3930 100644 (file)
--- a/src/platform/DARWIN/AFSPreference/Krb5Util.m
+++ b/src/platform/DARWIN/AFSPreference/Krb5Util.m
@@ -149,7 +149,7 @@
                                                            &me);
                                in.client = me;
                        }
-                       if (ret == 0) {
+                       if ((ret == 0) && (in.client)) {
                          ret = krb5_build_principal_ext(kcontext, &server,
                                                       krb5_princ_realm(kcontext,
                                                                        in.client)->length,