From: Philippe Antoine <contact@catenacyber.fr>
Date: Mon, 20 Apr 2020 11:57:44 +0000 (+0200)
Subject: detect: fix insertion in linked list for fast pattern
X-Git-Tag: suricata-5.0.3~41
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dfd825a8cceddeed761c1d1ae0598a0b17b1dc4e;p=thirdparty%2Fsuricata.git

detect: fix insertion in linked list for fast pattern

Make sure we do not add the same list_id twice
by checking at least all the lists with the current priority

(cherry picked from commit a0823bc6ecc0c9787fc148229331957fd55f9e97)
---

diff --git a/src/detect-fast-pattern.c b/src/detect-fast-pattern.c
index 564178b6fe..e81a93f0b6 100644
--- a/src/detect-fast-pattern.c
+++ b/src/detect-fast-pattern.c
@@ -98,7 +98,11 @@ void SupportFastPatternForSigMatchList(int list_id, int priority)
             return;
         }
 
-        if (priority <= tmp->priority)
+        /* We need a strict check to be sure that the current list
+         * was not already registered
+         * and other lists with the same priority hide it.
+         */
+        if (priority < tmp->priority)
             break;
 
         ip = tmp;