File 0004-BUG-MEDIUM-ssl-fix-bad-ssl-context-init-can-cause-se.patch of Package haproxy.748

From 4949d66f2a473f665b769d68e322e4d36f298080 Mon Sep 17 00:00:00 2001
From: Emeric Brun <ebrun@haproxy.comw>
Date: Wed, 12 Nov 2014 17:35:37 +0100
Subject: [PATCH 04/13] BUG/MEDIUM: ssl: fix bad ssl context init can cause
 segfault in case of OOM.

Some SSL context's init functions errors were not handled and
can cause a segfault due to an incomplete SSL context
initialization.

This fix must be backported to 1.5.
(cherry picked from commit 5547615cdac377797ae351a2e024376dbf6d6963)
---
 src/ssl_sock.c | 52 ++++++++++++++++++++++++++++++++++++++--------------
 1 file changed, 38 insertions(+), 14 deletions(-)

diff --git a/src/ssl_sock.c b/src/ssl_sock.c
index f8bfbe7..620609f 100644
--- a/src/ssl_sock.c
+++ b/src/ssl_sock.c
@@ -2040,15 +2040,29 @@ static int ssl_sock_init(struct connection *conn)
 			return -1;
 		}
 
+		/* set fd on SSL session context */
+		if (!SSL_set_fd(conn->xprt_ctx, conn->t.sock.fd)) {
+			SSL_free(conn->xprt_ctx);
+			conn->xprt_ctx = NULL;
+			conn->err_code = CO_ER_SSL_NO_MEM;
+			return -1;
+		}
+
+		/* set connection pointer */
+		if (!SSL_set_app_data(conn->xprt_ctx, conn)) {
+			SSL_free(conn->xprt_ctx);
+			conn->xprt_ctx = NULL;
+			conn->err_code = CO_ER_SSL_NO_MEM;
+			return -1;
+		}
+
 		SSL_set_connect_state(conn->xprt_ctx);
-		if (objt_server(conn->target)->ssl_ctx.reused_sess)
-			SSL_set_session(conn->xprt_ctx, objt_server(conn->target)->ssl_ctx.reused_sess);
-
-		/* set fd on SSL session context */
-		SSL_set_fd(conn->xprt_ctx, conn->t.sock.fd);
-
-		/* set connection pointer */
-		SSL_set_app_data(conn->xprt_ctx, conn);
+		if (objt_server(conn->target)->ssl_ctx.reused_sess) {
+			if(!SSL_set_session(conn->xprt_ctx, objt_server(conn->target)->ssl_ctx.reused_sess)) {
+				SSL_SESSION_free(objt_server(conn->target)->ssl_ctx.reused_sess);
+				objt_server(conn->target)->ssl_ctx.reused_sess = NULL;
+			}
+		}
 
 		/* leave init state and start handshake */
 		conn->flags |= CO_FL_SSL_WAIT_HS | CO_FL_WAIT_L6_CONN;
@@ -2065,14 +2079,24 @@ static int ssl_sock_init(struct connection *conn)
 			return -1;
 		}
 
+		/* set fd on SSL session context */
+		if (!SSL_set_fd(conn->xprt_ctx, conn->t.sock.fd)) {
+			SSL_free(conn->xprt_ctx);
+			conn->xprt_ctx = NULL;
+			conn->err_code = CO_ER_SSL_NO_MEM;
+			return -1;
+		}
+
+		/* set connection pointer */
+		if (!SSL_set_app_data(conn->xprt_ctx, conn)) {
+			SSL_free(conn->xprt_ctx);
+			conn->xprt_ctx = NULL;
+			conn->err_code = CO_ER_SSL_NO_MEM;
+			return -1;
+		}
+
 		SSL_set_accept_state(conn->xprt_ctx);
 
-		/* set fd on SSL session context */
-		SSL_set_fd(conn->xprt_ctx, conn->t.sock.fd);
-
-		/* set connection pointer */
-		SSL_set_app_data(conn->xprt_ctx, conn);
-
 		/* leave init state and start handshake */
 		conn->flags |= CO_FL_SSL_WAIT_HS | CO_FL_WAIT_L6_CONN;
 
-- 
2.1.4