From 8cbb153357896c4b224e0678550944f7851bc3b2 Mon Sep 17 00:00:00 2001
From: David Brodski <bid@softing.com>
Date: Tue, 13 May 2014 18:06:27 +0200
Subject: [PATCH] Fixed problem with multiple load-unload of comp zlib

Signed-off-by: Rich Salz <rsalz@akamai.com>
Reviewed-by: Tim Hudson <tjh@openssl.org>
---
 crypto/comp/c_zlib.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/crypto/comp/c_zlib.c b/crypto/comp/c_zlib.c
index 6a57f70926..f0fc0aff9e 100644
--- a/crypto/comp/c_zlib.c
+++ b/crypto/comp/c_zlib.c
@@ -309,7 +309,9 @@ COMP_METHOD *COMP_zlib(void)
 void COMP_zlib_cleanup(void)
 {
 #ifdef ZLIB_SHARED
-    DSO_free(zlib_dso);
+    if (zlib_dso != NULL)
+        DSO_free(zlib_dso);
+    zlib_dso = NULL;
 #endif
 }
 
-- 
2.25.1