[Fix] Do not use strdup on data extracted from lua

diff --git a/src/libserver/re_cache.c b/src/libserver/re_cache.c
index 88e346cc563df18624b018eb618c300444ec5668..a9fc2270b711ad47cece6c33a969fd8174307ee7 100644 (file)
--- a/src/libserver/re_cache.c
+++ b/src/libserver/re_cache.c
@@ -855,12 +855,15 @@ rspamd_re_cache_process_selector (struct rspamd_task *task,
        }
        else {
                gsize slen;
+               const gchar *sel_data;
 
                if (lua_type (L, -1) == LUA_TSTRING) {
+                       sel_data = lua_tolstring (L, -1, &slen);
                        *n = 1;
                        *svec = g_malloc (sizeof (guchar *));
                        *lenvec = g_malloc (sizeof (guint));
-                       (*svec)[0] = g_strdup (lua_tolstring (L, -1, &slen));
+                       (*svec)[0] = g_malloc (slen);
+                       memcpy ((*svec)[0], sel_data, slen);
                        (*lenvec)[0] = slen;
 
                        result = TRUE;
@@ -874,7 +877,10 @@ rspamd_re_cache_process_selector (struct rspamd_task *task,
 
                                for (guint i = 0; i < *n; i ++) {
                                        lua_rawgeti (L, -1, i + 1);
-                                       (*svec)[i] = g_strdup (lua_tolstring (L, -1, &slen));
+
+                                       sel_data = lua_tolstring (L, -1, &slen);
+                                       (*svec)[i] = g_malloc (slen);
+                                       memcpy ((*svec)[i], sel_data, slen);
                                        (*lenvec)[i] = slen;
                                        lua_pop (L, 1);
                                }