From 0824b0413455b668777e83cabe9fbc0ea81c400a Mon Sep 17 00:00:00 2001
From: Victor Julien <victor@inliniac.net>
Date: Thu, 24 Oct 2019 14:51:48 +0200
Subject: [PATCH] filestore: don't assume flow is TCP

Filestore can be used by UDP based protocols as well. NFSv2 is one
that Suricata supports.

Bug #3277.
---
 src/detect-filestore.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/src/detect-filestore.c b/src/detect-filestore.c
index a4bdc249d2..c2d1340c22 100644
--- a/src/detect-filestore.c
+++ b/src/detect-filestore.c
@@ -209,10 +209,11 @@ static int DetectFilestorePostMatch(DetectEngineThreadCtx *det_ctx,
 #endif
     }
 
-    /* set filestore depth for stream reassembling */
-    TcpSession *ssn = (TcpSession *)p->flow->protoctx;
-    TcpSessionSetReassemblyDepth(ssn, FileReassemblyDepth());
-
+    if (p->proto == IPPROTO_TCP && p->flow->protoctx != NULL) {
+        /* set filestore depth for stream reassembling */
+        TcpSession *ssn = (TcpSession *)p->flow->protoctx;
+        TcpSessionSetReassemblyDepth(ssn, FileReassemblyDepth());
+    }
     if (p->flowflags & FLOW_PKT_TOCLIENT)
         flags |= STREAM_TOCLIENT;
     else
-- 
2.47.2