From 4e8b5940020b6097f5941a243be6d9eeb41ba4d2 Mon Sep 17 00:00:00 2001
From: Gilles Peskine <Gilles.Peskine@arm.com>
Date: Fri, 20 Sep 2019 19:12:31 +0200
Subject: [PATCH] Fix uninitialized variable in an edge case

If `context_buf = mbedtls_calloc( 1, buf_len )` failed,
`context_buf_len` was not initialized. Noticed by
`gcc -Os -Werror=maybe-uninitialized`.

This was only a problem in ssl_server2 (a test program), only with
MBEDTLS_SSL_CONTEXT_SERIALIZATION enabled.
---
 programs/ssl/ssl_server2.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/programs/ssl/ssl_server2.c b/programs/ssl/ssl_server2.c
index 27f231230..d23a700f8 100644
--- a/programs/ssl/ssl_server2.c
+++ b/programs/ssl/ssl_server2.c
@@ -1820,7 +1820,7 @@ int main( int argc, char *argv[] )
 #endif
 #if defined(MBEDTLS_SSL_CONTEXT_SERIALIZATION)
     unsigned char *context_buf = NULL;
-    size_t context_buf_len;
+    size_t context_buf_len = 0;
 #endif
 
     int i;