From b7fd01c86e0d0f3c341031d62ec89e305859aa0b Mon Sep 17 00:00:00 2001
From: Philippe Antoine <contact@catenacyber.fr>
Date: Sun, 7 Feb 2021 21:34:12 +0100
Subject: [PATCH] detect: forbids unsupported prefilters

---
 src/detect-prefilter.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/detect-prefilter.c b/src/detect-prefilter.c
index 4aab7c1655..d91edcb17f 100644
--- a/src/detect-prefilter.c
+++ b/src/detect-prefilter.c
@@ -71,6 +71,11 @@ static int DetectPrefilterSetup (DetectEngineCtx *de_ctx, Signature *s, const ch
         SCLogError(SC_ERR_INVALID_SIGNATURE, "prefilter needs preceding match");
         SCReturnInt(-1);
     }
+    if (sigmatch_table[sm->type].SupportsPrefilter == NULL) {
+        SCLogError(SC_ERR_INVALID_SIGNATURE, "prefilter is not supported for %s",
+                sigmatch_table[sm->type].name);
+        SCReturnInt(-1);
+    }
 
     s->init_data->prefilter_sm = sm;