From 40c6f80ccffb16cf16c6e7ec525aea5fa8f5e828 Mon Sep 17 00:00:00 2001
From: Marc Stern <marc.stern@approach.be>
Date: Tue, 3 Oct 2023 16:50:12 +0200
Subject: [PATCH] Avoid some useless code and memory allocation in case no
 macro is present

---
 apache2/re_actions.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/apache2/re_actions.c b/apache2/re_actions.c
index 02ec07d2..94909c55 100644
--- a/apache2/re_actions.c
+++ b/apache2/re_actions.c
@@ -273,6 +273,7 @@ int expand_macros(modsec_rec *msr, msc_string *var, msre_rule *rule, apr_pool_t
                 next_text_start = p + 1;
             }
         } else {
+            if (arr->nelts == 0) return 0; /* no macro */
             /* Text part. */
             part = (msc_string *)apr_pcalloc(mptmp, sizeof(msc_string));
             part->value = apr_pstrdup(mptmp, text_start);