From: Vsevolod Stakhov <vsevolod@rspamd.com>
Date: Sat, 18 Jul 2026 09:26:39 +0000 (+0100)
Subject: [Fix] Fuzzy: skip injected (computed) parts on learn and check
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=74fd79900c2ffb45aa349777bf999b871b0df80b;p=thirdparty%2Frspamd.git

[Fix] Fuzzy: skip injected (computed) parts on learn and check
---

diff --git a/src/plugins/fuzzy_check.c b/src/plugins/fuzzy_check.c
index d17b2d935d..20743b189d 100644
--- a/src/plugins/fuzzy_check.c
+++ b/src/plugins/fuzzy_check.c
@@ -4792,6 +4792,11 @@ fuzzy_insert_metric_results(struct rspamd_task *task, struct fuzzy_rule *rule,
 	if (task->message) {
 		PTR_ARRAY_FOREACH(MESSAGE_FIELD(task, text_parts), i, tp)
 		{
+			if (tp->mime_part && (tp->mime_part->flags & RSPAMD_MIME_PART_COMPUTED)) {
+				/* Injected parts do not affect hashes weights */
+				continue;
+			}
+
 			if (!IS_TEXT_PART_EMPTY(tp) && kv_size(tp->utf_words) > 0) {
 				seen_text_part = TRUE;
 
@@ -5513,6 +5518,12 @@ fuzzy_generate_commands(struct rspamd_task *task, struct fuzzy_rule *rule,
 		check_part = FALSE;
 		fuzzy_check = FALSE;
 
+		if (mime_part->flags & RSPAMD_MIME_PART_COMPUTED) {
+			/* Never learn or check injected (computed) parts */
+			msg_debug_fuzzy_check("skip injected part %ud", mime_part->part_number);
+			continue;
+		}
+
 		if (fuzzy_rule_check_mimepart(task, rule, mime_part, &check_part,
 									  &fuzzy_check)) {
 			io = NULL;
@@ -6784,6 +6795,10 @@ fuzzy_lua_hex_hashes_handler(lua_State *L)
 			{
 				struct rspamd_cached_shingles *cached;
 
+				if (mp->flags & RSPAMD_MIME_PART_COMPUTED) {
+					continue;
+				}
+
 				cached = fuzzy_cmd_get_cached(rule, task, mp);
 
 				if (cached) {