retval = FALSE;
auth_mechanisms = NULL;
+ _dbus_init_system_log ();
+
context->systemd_activation = systemd_activation;
/* Check for an existing pid file. Of course this is a race;
va_end (args);
}
+static inline const char *
+nonnull (const char *maybe_null,
+ const char *if_null)
+{
+ return (maybe_null ? maybe_null : if_null);
+}
+
+/*
+ * Log something about a message, usually that it was rejected.
+ */
+static void
+complain_about_message (BusContext *context,
+ const char *error_name,
+ const char *complaint,
+ int matched_rules,
+ DBusMessage *message,
+ DBusConnection *sender,
+ DBusConnection *proposed_recipient,
+ dbus_bool_t requested_reply,
+ dbus_bool_t log,
+ DBusError *error)
+{
+ DBusError stack_error = DBUS_ERROR_INIT;
+ const char *sender_name;
+ const char *sender_loginfo;
+ const char *proposed_recipient_loginfo;
+
+ if (error == NULL && !(context->syslog && log))
+ return;
+
+ if (sender != NULL)
+ {
+ sender_name = bus_connection_get_name (sender);
+ sender_loginfo = bus_connection_get_loginfo (sender);
+ }
+ else
+ {
+ sender_name = "(unset)";
+ sender_loginfo = "(bus)";
+ }
+
+ if (proposed_recipient != NULL)
+ proposed_recipient_loginfo = bus_connection_get_loginfo (proposed_recipient);
+ else
+ proposed_recipient_loginfo = "bus";
+
+ dbus_set_error (&stack_error, error_name,
+ "%s, %d matched rules; type=\"%s\", sender=\"%s\" (%s) "
+ "interface=\"%s\" member=\"%s\" error name=\"%s\" "
+ "requested_reply=\"%d\" destination=\"%s\" (%s)",
+ complaint,
+ matched_rules,
+ dbus_message_type_to_string (dbus_message_get_type (message)),
+ sender_name,
+ sender_loginfo,
+ nonnull (dbus_message_get_interface (message), "(unset)"),
+ nonnull (dbus_message_get_member (message), "(unset)"),
+ nonnull (dbus_message_get_error_name (message), "(unset)"),
+ requested_reply,
+ nonnull (dbus_message_get_destination (message), DBUS_SERVICE_DBUS),
+ proposed_recipient_loginfo);
+
+ /* If we hit OOM while setting the error, this will syslog "out of memory"
+ * which is itself an indication that something is seriously wrong */
+ if (log)
+ bus_context_log (context, DBUS_SYSTEM_LOG_SECURITY, "%s",
+ stack_error.message);
+
+ dbus_move_error (&stack_error, error);
+}
+
/*
* addressed_recipient is the recipient specified in the message.
*
addressed_recipient != NULL ||
strcmp (dest, DBUS_SERVICE_DBUS) == 0);
- /* Used in logging below */
- if (sender != NULL)
- {
- sender_name = bus_connection_get_name (sender);
- sender_loginfo = bus_connection_get_loginfo (sender);
- }
- else
- {
- sender_name = NULL;
- sender_loginfo = "(bus)";
- }
-
- if (proposed_recipient != NULL)
- proposed_recipient_loginfo = bus_connection_get_loginfo (proposed_recipient);
- else
- proposed_recipient_loginfo = "bus";
-
switch (type)
{
case DBUS_MESSAGE_TYPE_METHOD_CALL:
{
if (error != NULL && !dbus_error_is_set (error))
{
- dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED,
- "An SELinux policy prevents this sender "
- "from sending this message to this recipient "
- "(rejected message had sender \"%s\" interface \"%s\" "
- "member \"%s\" error name \"%s\" destination \"%s\")",
- sender_name ? sender_name : "(unset)",
- dbus_message_get_interface (message) ?
- dbus_message_get_interface (message) : "(unset)",
- dbus_message_get_member (message) ?
- dbus_message_get_member (message) : "(unset)",
- dbus_message_get_error_name (message) ?
- dbus_message_get_error_name (message) : "(unset)",
- dest ? dest : DBUS_SERVICE_DBUS);
+ /* don't syslog this, just set the error: avc_has_perm should
+ * have already written to either the audit log or syslog */
+ complain_about_message (context, DBUS_ERROR_ACCESS_DENIED,
+ "An SELinux policy prevents this sender from sending this "
+ "message to this recipient",
+ 0, message, sender, proposed_recipient, FALSE, FALSE, error);
_dbus_verbose ("SELinux security check denying send to service\n");
}
const char *msg = "Rejected send message, %d matched rules; "
"type=\"%s\", sender=\"%s\" (%s) interface=\"%s\" member=\"%s\" error name=\"%s\" requested_reply=%d destination=\"%s\" (%s))";
- dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED, msg,
- toggles,
- dbus_message_type_to_string (dbus_message_get_type (message)),
- sender_name ? sender_name : "(unset)",
- sender_loginfo,
- dbus_message_get_interface (message) ?
- dbus_message_get_interface (message) : "(unset)",
- dbus_message_get_member (message) ?
- dbus_message_get_member (message) : "(unset)",
- dbus_message_get_error_name (message) ?
- dbus_message_get_error_name (message) : "(unset)",
- requested_reply,
- dest ? dest : DBUS_SERVICE_DBUS,
- proposed_recipient_loginfo);
- /* Needs to be duplicated to avoid calling malloc and having to handle OOM */
- if (addressed_recipient == proposed_recipient)
- bus_context_log (context, DBUS_SYSTEM_LOG_SECURITY, msg,
- toggles,
- dbus_message_type_to_string (dbus_message_get_type (message)),
- sender_name ? sender_name : "(unset)",
- sender_loginfo,
- dbus_message_get_interface (message) ?
- dbus_message_get_interface (message) : "(unset)",
- dbus_message_get_member (message) ?
- dbus_message_get_member (message) : "(unset)",
- dbus_message_get_error_name (message) ?
- dbus_message_get_error_name (message) : "(unset)",
- requested_reply,
- dest ? dest : DBUS_SERVICE_DBUS,
- proposed_recipient_loginfo);
+ complain_about_message (context, DBUS_ERROR_ACCESS_DENIED,
+ "Rejected send message", toggles,
+ message, sender, proposed_recipient, requested_reply,
+ (addressed_recipient == proposed_recipient), error);
_dbus_verbose ("security policy disallowing message due to sender policy\n");
return FALSE;
}
if (log)
- bus_context_log (context, DBUS_SYSTEM_LOG_SECURITY,
- "Would reject message, %d matched rules; "
- "type=\"%s\", sender=\"%s\" (%s) interface=\"%s\" member=\"%s\" error name=\"%s\" requested_reply=%d destination=\"%s\" (%s))",
- toggles,
- dbus_message_type_to_string (dbus_message_get_type (message)),
- sender_name ? sender_name : "(unset)",
- sender_loginfo,
- dbus_message_get_interface (message) ?
- dbus_message_get_interface (message) : "(unset)",
- dbus_message_get_member (message) ?
- dbus_message_get_member (message) : "(unset)",
- dbus_message_get_error_name (message) ?
- dbus_message_get_error_name (message) : "(unset)",
- requested_reply,
- dest ? dest : DBUS_SERVICE_DBUS,
- proposed_recipient_loginfo);
+ {
+ /* We want to drop this message, and are only not doing so for backwards
+ * compatibility. */
+ complain_about_message (context, DBUS_ERROR_ACCESS_DENIED,
+ "Would reject message", toggles,
+ message, sender, proposed_recipient, requested_reply,
+ TRUE, NULL);
+ }
if (recipient_policy &&
!bus_client_policy_check_can_receive (recipient_policy,
addressed_recipient, proposed_recipient,
message, &toggles))
{
- const char *msg = "Rejected receive message, %d matched rules; "
- "type=\"%s\" sender=\"%s\" (%s) interface=\"%s\" member=\"%s\" error name=\"%s\" reply serial=%u requested_reply=%d destination=\"%s\" (%s))";
-
- dbus_set_error (error, DBUS_ERROR_ACCESS_DENIED, msg,
- toggles,
- dbus_message_type_to_string (dbus_message_get_type (message)),
- sender_name ? sender_name : "(unset)",
- sender_loginfo,
- dbus_message_get_interface (message) ?
- dbus_message_get_interface (message) : "(unset)",
- dbus_message_get_member (message) ?
- dbus_message_get_member (message) : "(unset)",
- dbus_message_get_error_name (message) ?
- dbus_message_get_error_name (message) : "(unset)",
- dbus_message_get_reply_serial (message),
- requested_reply,
- dest ? dest : DBUS_SERVICE_DBUS,
- proposed_recipient_loginfo);
- /* Needs to be duplicated to avoid calling malloc and having to handle OOM */
- if (addressed_recipient == proposed_recipient)
- bus_context_log (context, DBUS_SYSTEM_LOG_SECURITY, msg,
- toggles,
- dbus_message_type_to_string (dbus_message_get_type (message)),
- sender_name ? sender_name : "(unset)",
- sender_loginfo,
- dbus_message_get_interface (message) ?
- dbus_message_get_interface (message) : "(unset)",
- dbus_message_get_member (message) ?
- dbus_message_get_member (message) : "(unset)",
- dbus_message_get_error_name (message) ?
- dbus_message_get_error_name (message) : "(unset)",
- dbus_message_get_reply_serial (message),
- requested_reply,
- dest ? dest : DBUS_SERVICE_DBUS,
- proposed_recipient_loginfo);
+ complain_about_message (context, DBUS_ERROR_ACCESS_DENIED,
+ "Rejected receive message", toggles,
+ message, sender, proposed_recipient, requested_reply,
+ (addressed_recipient == proposed_recipient), NULL);
_dbus_verbose ("security policy disallowing message due to recipient policy\n");
return FALSE;
}
((dbus_connection_get_outgoing_size (proposed_recipient) > context->limits.max_outgoing_bytes) ||
(dbus_connection_get_outgoing_unix_fds (proposed_recipient) > context->limits.max_outgoing_unix_fds)))
{
- dbus_set_error (error, DBUS_ERROR_LIMITS_EXCEEDED,
- "The destination service \"%s\" has a full message queue",
- dest ? dest : (proposed_recipient ?
- bus_connection_get_name (proposed_recipient) :
- DBUS_SERVICE_DBUS));
+ complain_about_message (context, DBUS_ERROR_LIMITS_EXCEEDED,
+ "Rejected: destination has a full message queue",
+ 0, message, sender, proposed_recipient, requested_reply, TRUE,
+ error);
_dbus_verbose ("security policy disallowing message due to full message queue\n");
return FALSE;
}
projects / platform / upstream / dbus.git / blobdiff