From: Vsevolod Stakhov <vsevolod@rspamd.com>
Date: Tue, 20 Jan 2026 16:13:21 +0000 (+0000)
Subject: [Fix] Use rspamd_text for subprocess callback data to avoid large allocations
X-Git-Tag: 4.0.0~179^2~9
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=56ba2baed212e08559e772bf4dcf9d13d2028a38;p=thirdparty%2Frspamd.git

[Fix] Use rspamd_text for subprocess callback data to avoid large allocations

Replace lua_pushlstring with lua_new_text(FALSE) when passing subprocess
result data to Lua callbacks. This avoids copying potentially large buffers
(e.g., 2.7MB neural network training results) into Lua's heap, which could
cause crashes under memory pressure.
---

diff --git a/src/lua/lua_worker.c b/src/lua/lua_worker.c
index bfe8175502..5831d172ef 100644
--- a/src/lua/lua_worker.c
+++ b/src/lua/lua_worker.c
@@ -569,7 +569,7 @@ rspamd_lua_call_on_complete(lua_State *L,
 	}
 
 	if (data) {
-		lua_pushlstring(L, data, datalen);
+		lua_new_text(L, data, datalen, FALSE);
 	}
 	else {
 		lua_pushnil(L);