From a7e17a34ad7b29e06120e9abfeb82149c742fcf1 Mon Sep 17 00:00:00 2001
From: Andreas Schneider <asn@cryptomilk.org>
Date: Tue, 28 May 2019 08:41:48 +0200
Subject: [PATCH] gzip: Add missing NULL check

CID 1398980

Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
---
 src/gzip.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/gzip.c b/src/gzip.c
index 38f0de72..2de576f8 100644
--- a/src/gzip.c
+++ b/src/gzip.c
@@ -67,6 +67,9 @@ static ssh_buffer gzip_compress(ssh_session session, ssh_buffer source, int leve
   int status;
 
   crypto = ssh_packet_get_current_crypto(session, SSH_DIRECTION_OUT);
+  if (crypto == NULL) {
+      return NULL;
+  }
   zout = crypto->compress_out_ctx;
   if (zout == NULL) {
     zout = crypto->compress_out_ctx = initcompress(session, level);