From: Jan Smutny <js@excello.cz>
Date: Tue, 31 Aug 2021 12:25:23 +0000 (+0200)
Subject: [Fix] src/lua/lua_mimepart.c: fix null dereference
X-Git-Tag: 3.1~207^2
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=refs%2Fpull%2F3873%2Fhead;p=thirdparty%2Frspamd.git

[Fix] src/lua/lua_mimepart.c: fix null dereference
---

diff --git a/src/lua/lua_mimepart.c b/src/lua/lua_mimepart.c
index 66b588e3aa..21a46d496e 100644
--- a/src/lua/lua_mimepart.c
+++ b/src/lua/lua_mimepart.c
@@ -1240,7 +1240,16 @@ lua_textpart_get_fuzzy_hashes (lua_State * L)
 	rspamd_stat_token_t *word;
 	struct lua_shingle_filter_cbdata cbd;
 
-	if (part && pool) {
+
+	if (part == NULL || pool == NULL) {
+		return luaL_error (L, "invalid arguments");
+	}
+
+	if (IS_TEXT_PART_EMPTY (part) || part->utf_words == NULL) {
+		lua_pushnil (L);
+		lua_pushnil (L);
+	}
+	else {
 		/* TODO: add keys and algorithms support */
 		rspamd_cryptobox_hash (key, "rspamd", strlen ("rspamd"), NULL, 0);
 
@@ -1294,9 +1303,6 @@ lua_textpart_get_fuzzy_hashes (lua_State * L)
 			}
 		}
 	}
-	else {
-		return luaL_error (L, "invalid arguments");
-	}
 
 	return 2;
 }