Comment 3 for bug 540464

If an unprivileged user runs something along the lines of:
$ pkcheck --allow-user-interaction --process 0 --action-id ACTION
with action requiring authentication (have not tested others), then polkitd crashes. This is kind of annoying...

Reported in Ubuntu 9.10 with PolicyKit 0.96.

#0 _egg_dbus_error_encode_gerror (error=0x24620b0) at eggdbuserror.c:135
 domain_as_string = (const gchar *) 0x0
 s = <value optimized out>
 n = <value optimized out>
 enum_type = <value optimized out>
#1 0x00007fb76001b7a1 in egg_dbus_method_invocation_return_gerror (
    method_invocation=0x24699c0, error=0x24620b0)
    at eggdbusmethodinvocation.c:342
 error_name = <value optimized out>
#2 0x00007fb760f37fd1 in check_auth_cb (source_object=<value optimized out>,
    res=<value optimized out>, user_data=<value optimized out>)
    at polkitbackendauthority.c:875
 method_invocation = (EggDBusMethodInvocation *) 0x24699c0
 result = (PolkitAuthorizationResult *) 0x0
 error = (GError *) 0x24620b0
#3 0x00007fb760f3ae89 in polkit_backend_interactive_authority_check_authorization (authority=0x2463760, caller=0x2479300, subject=<value optimized out>,
    action_id=<value optimized out>, details=<value optimized out>,
    flags=<value optimized out>, cancellable=0x0,
    callback=0x7fb760f37f00 <check_auth_cb>, user_data=0x24699c0)
    at polkitbackendinteractiveauthority.c:742
 priv = <value optimized out>
 caller_str = (gchar *) 0x2464af0 "system-bus-name::1.70"
 subject_str = (gchar *) 0x2464b10 "unix-process:2083:0"
 user_of_caller = (PolkitIdentity *) 0x2451740
 user_of_subject = (PolkitIdentity *) 0x0
 user_of_caller_str = (gchar *) 0x2475a80 "unix-user:pang"
 user_of_subject_str = (gchar *) 0x8 <Address 0x8 out of bounds>
 result = (PolkitAuthorizationResult *) 0xd8
 implicit_authorization = 1624055424
 error = (GError *) 0x2470c80
 simple = (GSimpleAsyncResult *) 0x2473120
 has_details = 216
 detail_keys = <value optimized out>
#4 0x00007fb760f3794b in authority_handle_check_authorization (
    instance=<value optimized out>, real_subject=<value optimized out>,
    action_id=<value optimized out>, real_details=<value optimized out>,
    flags=<value optimized out>, cancellation_id=<value optimized out>,
    method_invocation=0x24699c0) at polkitbackendauthority.c:953
 caller_name = <value optimized out>
 subject = <value optimized out>
 caller = (PolkitSubject *) 0x2479300
 cancellable = (GCancellable *) 0x0
 details = (PolkitDetails *) 0x2461ae0
#5 0x00007fb760f48379 in handle_message (interface=0x2472ea0,
    message=<value optimized out>) at _polkitauthority.c:2883
 __PRETTY_FUNCTION__ = "handle_message"
#6 0x00007fb7600134c8 in filter_function (dconnection=<value optimized out>,
    message=0x245ccc0, user_data=<value optimized out>)
    at eggdbusconnection.c:2213
 ret = DBUS_HANDLER_RESULT_HANDLED
#7 0x00007fb75ee80386 in dbus_connection_dispatch (connection=0x245c7f0)
    at dbus-connection.c:4444
 filter = <value optimized out>
 next = (DBusList *) 0x0
 message = (DBusMessage *) 0x245ccc0
 link = <value optimized out>
 filter_list_copy = (DBusList *) 0x24722b0
 message_link = (DBusList *) 0x24722e0
 result = <value optimized out>
 status = <value optimized out>
 __FUNCTION__ = "dbus_connection_dispatch"
#8 0x00007fb75f0b8e45 in message_queue_dispatch (
    source=<value optimized out>, callback=<value optimized out>,
    user_data=<value optimized out>) at dbus-gmain.c:101
 connection = (DBusConnection *) 0x245c7f0
#9 0x00007fb760a38432 in g_main_context_dispatch ()
   from /lib/libglib-2.0.so.0
No symbol table info available.
#10 0x00007fb760a3c2b8 in ?? () from /lib/libglib-2.0.so.0
No symbol table info available.
#11 0x00007fb760a3c7c5 in g_main_loop_run () from /lib/libglib-2.0.so.0
No symbol table info available.
#12 0x0000000000400a62 in main (argc=<value optimized out>,
    argv=<value optimized out>) at main.c:59
 ret = 0
 error = (GError *) 0x0
 loop = <value optimized out>
 authority = (PolkitBackendAuthority *) 0x2463760