PR: 2072
Submitted by: Tomas Mraz <tmraz@redhat.com>
Approved by: steve@openssl.org

Avoid potential doublefree and reuse of freed handshake_buffer.

ssl/s3_lib.c

diff --git a/ssl/s3_lib.c b/ssl/s3_lib.c
index 7aa1c03..d6b047c 100644
--- a/ssl/s3_lib.c
+++ b/ssl/s3_lib.c
@@ -2211,6 +2211,7 @@
  	wlen = s->s3->wbuf.len;
 	if (s->s3->handshake_buffer) {
 		BIO_free(s->s3->handshake_buffer);
+		s->s3->handshake_buffer = NULL;
 	}
 	if (s->s3->handshake_dgst) {
 		ssl3_free_digest_list(s);