From 985cb9257343b277def6d561d0c0592e77abbce1 Mon Sep 17 00:00:00 2001
From: Victor Julien <victor@inliniac.net>
Date: Thu, 1 Nov 2012 15:17:14 +0100
Subject: [PATCH] http: don't assume http tx to have header alloc'd. Can happen
 in OOM conditions. Bug #587.

---
 src/detect-engine-hhd.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/detect-engine-hhd.c b/src/detect-engine-hhd.c
index a2a7abf621..aefa9eb03a 100644
--- a/src/detect-engine-hhd.c
+++ b/src/detect-engine-hhd.c
@@ -131,6 +131,8 @@ static void DetectEngineBufferHttpHeaders(DetectEngineThreadCtx *det_ctx, Flow *
         } else {
             headers = tx->response_headers;
         }
+        if (headers == NULL)
+            continue;
 
         htp_header_t *h = NULL;
         uint8_t *headers_buffer = NULL;