Index: mod_authz_dbd.c
===================================================================
--- mod_authz_dbd.c	(revision 1684918)
+++ mod_authz_dbd.c	(working copy)
@@ -126,6 +126,11 @@
                       "No query configured for %s!", action);
         return HTTP_INTERNAL_SERVER_ERROR;
     }
+    if (dbd == NULL) {
+        ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO()
+                      "No db handle available for %s! Check your database access", action);
+        return HTTP_INTERNAL_SERVER_ERROR;
+    }
     query = apr_hash_get(dbd->prepared, cfg->query, APR_HASH_KEY_STRING);
     if (query == NULL) {
         ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01643)
@@ -212,6 +217,11 @@
                       "No query configured for dbd-group!");
         return HTTP_INTERNAL_SERVER_ERROR;
     }
+    if (dbd == NULL) {
+        ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO()
+                      "No db handle available for dbd-query! Check your database access");
+        return HTTP_INTERNAL_SERVER_ERROR;
+    }
     query = apr_hash_get(dbd->prepared, cfg->query, APR_HASH_KEY_STRING);
     if (query == NULL) {
         ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01650)