detect/urilen: don't pass null pointer to pcre2 free

Bug #5228.

diff --git a/src/detect-urilen.c b/src/detect-urilen.c
index feb61d2acb49c1785c33fbcbb9643c3292cf40f1..a8a16554c834f43c2b17fe0420190f8e718892f1 100644 (file)
--- a/src/detect-urilen.c
+++ b/src/detect-urilen.c
@@ -207,7 +207,8 @@ static DetectUrilenData *DetectUrilenParse (const char *urilenstr)
         }
     }
 
-    pcre2_substring_free((PCRE2_UCHAR *)arg1);
+    if (arg1 != NULL)
+        pcre2_substring_free((PCRE2_UCHAR *)arg1);
     pcre2_substring_free((PCRE2_UCHAR *)arg2);
     if (arg3 != NULL)
         pcre2_substring_free((PCRE2_UCHAR *)arg3);