4 files changed, 14 insertions, 8 deletions
diff --git a/src/libserver/fuzzy_backend/fuzzy_backend.c b/src/libserver/fuzzy_backend/fuzzy_backend.c
index bab2895cd..3d5cbb863 100644
--- a/src/libserver/fuzzy_backend/fuzzy_backend.c
+++ b/src/libserver/fuzzy_backend/fuzzy_backend.c
@@ -562,6 +562,11 @@ void rspamd_fuzzy_backend_close(struct rspamd_fuzzy_backend *bk)
 	g_free(bk);
 }
 
+bool rspamd_fuzzy_backend_is_noop(struct rspamd_fuzzy_backend *bk)
+{
+	return bk->type == RSPAMD_FUZZY_BACKEND_NOOP;
+}
+
 struct ev_loop *
 rspamd_fuzzy_backend_event_base(struct rspamd_fuzzy_backend *backend)
 {
diff --git a/src/libserver/fuzzy_backend/fuzzy_backend.h b/src/libserver/fuzzy_backend/fuzzy_backend.h
index fe22d473e..249c4d1c3 100644
--- a/src/libserver/fuzzy_backend/fuzzy_backend.h
+++ b/src/libserver/fuzzy_backend/fuzzy_backend.h
@@ -1,11 +1,11 @@
-/*-
- * Copyright 2016 Vsevolod Stakhov
+/*
+ * Copyright 2025 Vsevolod Stakhov
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
- *   http://www.apache.org/licenses/LICENSE-2.0
+ *    http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
@@ -124,6 +124,8 @@ double rspamd_fuzzy_backend_get_expire(struct rspamd_fuzzy_backend *backend);
  */
 void rspamd_fuzzy_backend_close(struct rspamd_fuzzy_backend *backend);
 
+bool rspamd_fuzzy_backend_is_noop(struct rspamd_fuzzy_backend *bk);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/src/libserver/fuzzy_backend/fuzzy_backend_noop.c b/src/libserver/fuzzy_backend/fuzzy_backend_noop.c
index 451a1921b..024d19882 100644
--- a/src/libserver/fuzzy_backend/fuzzy_backend_noop.c
+++ b/src/libserver/fuzzy_backend/fuzzy_backend_noop.c
@@ -26,7 +26,8 @@ void *rspamd_fuzzy_backend_init_noop(struct rspamd_fuzzy_backend *bk,
 									 struct rspamd_config *cfg,
 									 GError **err)
 {
-	return NULL;
+	/* Return non-NULL to distinguish from error */
+	return (void *) (uintptr_t) (-1);
 }
 
 void rspamd_fuzzy_backend_check_noop(struct rspamd_fuzzy_backend *bk,
@@ -50,7 +51,7 @@ void rspamd_fuzzy_backend_update_noop(struct rspamd_fuzzy_backend *bk,
 									  void *subr_ud)
 {
 	if (cb) {
-		cb(FALSE, 0, 0, 0, 0, ud);
+		cb(TRUE, 0, 0, 0, 0, ud);
 	}
 
 	return;
diff --git a/src/libserver/fuzzy_backend/fuzzy_backend_redis.c b/src/libserver/fuzzy_backend/fuzzy_backend_redis.c
index 27c663070..f150d48be 100644
--- a/src/libserver/fuzzy_backend/fuzzy_backend_redis.c
+++ b/src/libserver/fuzzy_backend/fuzzy_backend_redis.c
@@ -116,11 +116,9 @@ rspamd_redis_get_servers(struct rspamd_fuzzy_backend_redis *ctx,
 		res = *((struct upstream_list **) lua_touserdata(L, -1));
 	}
 	else {
-		struct lua_logger_trace tr;
 		char outbuf[8192];
 
-		memset(&tr, 0, sizeof(tr));
-		lua_logger_out_type(L, -2, outbuf, sizeof(outbuf) - 1, &tr,
+		lua_logger_out(L, -2, outbuf, sizeof(outbuf),
 							LUA_ESCAPE_UNPRINTABLE);
 
 		msg_err("cannot get %s upstreams for Redis fuzzy storage %s; table content: %s",