From da7f1d22ccfe1353fb1dd6966bf209e8b1524754 Mon Sep 17 00:00:00 2001
From: Victor Julien <victor@inliniac.net>
Date: Thu, 1 Nov 2012 15:26:47 +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 2e996e2fed..745e41283e 100644
--- a/src/detect-engine-hhd.c
+++ b/src/detect-engine-hhd.c
@@ -131,6 +131,8 @@ static uint8_t *DetectEngineHHDGetBufferForTX(int tx_id,
     } else {
         headers = tx->response_headers;
     }
+    if (headers == NULL)
+        goto end;
 
     htp_header_t *h = NULL;
     uint8_t *headers_buffer = det_ctx->hhd_buffers[index];